const API = 'api.php';
let customers = [];
let sortField = 'yritys';
let sortAsc = true;
let currentDetailId = null;
let currentUser = { username: '', nimi: '', role: '' };
let currentCompany = null;     // {id, nimi}
let availableCompanies = [];   // [{id, nimi}, ...]
let currentTicketCompanyId = ''; // Avatun tiketin yritys (cross-company tuki)
let currentUserSignatures = {};  // {mailbox_id: "allekirjoitus teksti"}

// Elements
const loginScreen = document.getElementById('login-screen');
const dashboard = document.getElementById('dashboard');
const loginForm = document.getElementById('login-form');
const loginError = document.getElementById('login-error');
const searchInput = document.getElementById('search-input');
const tbody = document.getElementById('customer-tbody');
const noCustomers = document.getElementById('no-customers');
const customerCount = document.getElementById('customer-count');
const totalBilling = document.getElementById('total-billing');
const customerModal = document.getElementById('customer-modal');
const detailModal = document.getElementById('detail-modal');
const customerForm = document.getElementById('customer-form');
const userModal = document.getElementById('user-modal');

// API helpers
async function apiCall(action, method = 'GET', body = null) {
    const opts = { method, credentials: 'include' };
    if (body) {
        opts.headers = { 'Content-Type': 'application/json' };
        opts.body = JSON.stringify(body);
    }
    const res = await fetch(`${API}?action=${action}`, opts);
    const text = await res.text();
    let data;
    try { data = JSON.parse(text); } catch (e) {
        console.error('API JSON parse error:', action, text.slice(0, 500));
        throw new Error('API virhe (' + action + '): ' + text.slice(0, 300));
    }
    if (!res.ok) throw new Error(data.error || 'Virhe');
    return data;
}

// ==================== AUTH ====================

const forgotBox = document.getElementById('forgot-box');
const resetBox = document.getElementById('reset-box');
const loginBox = document.querySelector('.login-box');

function showLoginView() {
    loginBox.style.display = '';
    forgotBox.style.display = 'none';
    resetBox.style.display = 'none';
}

function showForgotView() {
    loginBox.style.display = 'none';
    forgotBox.style.display = '';
    resetBox.style.display = 'none';
}

function showResetView() {
    loginBox.style.display = 'none';
    forgotBox.style.display = 'none';
    resetBox.style.display = '';
}

document.getElementById('forgot-link').addEventListener('click', (e) => { e.preventDefault(); showForgotView(); });
document.getElementById('forgot-back').addEventListener('click', (e) => { e.preventDefault(); showLoginView(); });

async function loadCaptcha() {
    try {
        const data = await apiCall('captcha');
        document.getElementById('captcha-question').textContent = data.question;
    } catch (e) {
        document.getElementById('captcha-question').textContent = 'Virhe';
    }
}

// Salasanan palautuspyyntö
document.getElementById('forgot-form').addEventListener('submit', async (e) => {
    e.preventDefault();
    const username = document.getElementById('forgot-username').value;
    const forgotMsg = document.getElementById('forgot-msg');
    const forgotError = document.getElementById('forgot-error');
    forgotMsg.style.display = 'none';
    forgotError.style.display = 'none';
    try {
        await apiCall('password_reset_request', 'POST', { username });
        forgotMsg.textContent = 'Jos käyttäjätunnukselle on sähköposti, palautuslinkki on lähetetty.';
        forgotMsg.style.display = 'block';
    } catch (err) {
        forgotError.textContent = err.message;
        forgotError.style.display = 'block';
    }
});

// Salasanan vaihto (reset token)
document.getElementById('reset-form').addEventListener('submit', async (e) => {
    e.preventDefault();
    const pw1 = document.getElementById('reset-password').value;
    const pw2 = document.getElementById('reset-password2').value;
    const resetMsg = document.getElementById('reset-msg');
    const resetError = document.getElementById('reset-error');
    resetMsg.style.display = 'none';
    resetError.style.display = 'none';
    if (pw1 !== pw2) { resetError.textContent = 'Salasanat eivät täsmää'; resetError.style.display = 'block'; return; }
    const params = new URLSearchParams(window.location.search);
    const token = params.get('reset');
    try {
        await apiCall('password_reset', 'POST', { token, password: pw1 });
        resetMsg.textContent = 'Salasana vaihdettu! Voit nyt kirjautua.';
        resetMsg.style.display = 'block';
        document.getElementById('reset-form').style.display = 'none';
        setTimeout(() => { window.location.href = window.location.pathname; }, 3000);
    } catch (err) {
        resetError.textContent = err.message;
        resetError.style.display = 'block';
    }
});

async function checkAuth() {
    // Tarkista onko URL:ssa reset-token
    const params = new URLSearchParams(window.location.search);
    if (params.get('reset')) {
        loginScreen.style.display = 'flex';
        try {
            const data = await apiCall('validate_reset_token&token=' + encodeURIComponent(params.get('reset')));
            if (data.valid) { showResetView(); return; }
        } catch (e) {}
        showResetView();
        document.getElementById('reset-error').textContent = 'Palautuslinkki on vanhentunut tai virheellinen';
        document.getElementById('reset-error').style.display = 'block';
        document.getElementById('reset-form').style.display = 'none';
        return;
    }
    try {
        const data = await apiCall('check_auth');
        if (data.authenticated) {
            currentUser = { username: data.username, nimi: data.nimi, role: data.role, id: data.user_id };
            availableCompanies = data.companies || [];
            currentCompany = availableCompanies.find(c => c.id === data.company_id) || availableCompanies[0] || null;
            currentUserSignatures = data.signatures || {};
            if (data.branding) applyBranding(data.branding);
            applyModules(data.enabled_modules || []);
            showDashboard();
            return;
        }
    } catch (e) { /* not logged in */ }
    // Ei kirjautuneena → näytä login
    loginScreen.style.display = 'flex';
}

loginForm.addEventListener('submit', async (e) => {
    e.preventDefault();
    const username = document.getElementById('login-username').value;
    const password = document.getElementById('login-password').value;
    const captcha = document.getElementById('login-captcha').value;
    try {
        const data = await apiCall('login', 'POST', { username, password, captcha: parseInt(captcha) });
        loginError.style.display = 'none';
        currentUser = { username: data.username, nimi: data.nimi, role: data.role, id: data.user_id };
        availableCompanies = data.companies || [];
        currentCompany = availableCompanies.find(c => c.id === data.company_id) || availableCompanies[0] || null;
        currentUserSignatures = data.signatures || {};
        showDashboard();
    } catch (err) {
        loginError.textContent = err.message;
        loginError.style.display = 'block';
        document.getElementById('login-captcha').value = '';
        loadCaptcha();
    }
});

document.getElementById('btn-logout').addEventListener('click', async () => {
    await apiCall('logout');
    dashboard.style.display = 'none';
    loginScreen.style.display = 'flex';
    document.getElementById('login-username').value = '';
    document.getElementById('login-password').value = '';
    document.getElementById('login-captcha').value = '';
    showLoginView();
    loadCaptcha();
    loadBranding(); // Domain-pohjainen brändäys uudelleen
});

async function showDashboard() {
    loginScreen.style.display = 'none';
    dashboard.style.display = 'block';
    document.getElementById('user-info').textContent = currentUser.nimi || currentUser.username;
    const isSuperAdmin = currentUser.role === 'superadmin';
    const isAdmin = currentUser.role === 'admin' || isSuperAdmin;
    // Näytä admin-toiminnot roolin mukaan
    document.getElementById('btn-users').style.display = isAdmin ? '' : 'none';
    document.getElementById('tab-settings').style.display = isAdmin ? '' : 'none';
    document.getElementById('btn-companies').style.display = isAdmin ? '' : 'none';
    // Yritysvalitsin
    populateCompanySelector();
    // Avaa oikea tabi URL-hashin perusteella (tai customers oletuks)
    const hash = window.location.hash.replace('#', '');
    const [mainHash, subHash] = hash.split('/');
    const validTabs = ['customers', 'leads', 'tekniikka', 'ohjeet', 'todo', 'documents', 'laitetilat', 'netadmin', 'archive', 'changelog', 'support', 'users', 'settings', 'companies'];
    const startTab = validTabs.includes(mainHash) ? mainHash : 'customers';
    switchToTab(startTab, subHash);
}

function populateCompanySelector() {
    const sel = document.getElementById('company-selector');
    if (availableCompanies.length <= 1) {
        sel.style.display = 'none';
        return;
    }
    sel.style.display = '';
    sel.innerHTML = availableCompanies.map(c =>
        `<option value="${c.id}" ${currentCompany && c.id === currentCompany.id ? 'selected' : ''}>${esc(c.nimi)}</option>`
    ).join('');
}

async function switchCompany(companyId) {
    try {
        await apiCall('company_switch', 'POST', { company_id: companyId });
        currentCompany = availableCompanies.find(c => c.id === companyId) || null;
        // Päivitä brändäys vaihdetun yrityksen mukaan
        try {
            const auth = await apiCall('check_auth');
            if (auth.branding) applyBranding(auth.branding);
            applyModules(auth.enabled_modules || []);
        } catch (e2) {}
        // Lataa uudelleen aktiivinen tab
        const hash = window.location.hash.replace('#', '') || 'customers';
        const [mainTab, subTab] = hash.split('/');
        switchToTab(mainTab, subTab);
    } catch (e) { alert(e.message); }
}

// ==================== TABS ====================

function switchToTab(target, subTab) {
    document.querySelectorAll('.tab').forEach(t => t.classList.remove('active'));
    document.querySelectorAll('.tab-content').forEach(c => c.classList.remove('active'));
    const tabBtn = document.querySelector(`.tab[data-tab="${target}"]`);
    if (tabBtn) tabBtn.classList.add('active');
    const content = document.getElementById('tab-content-' + target);
    if (content) content.classList.add('active');
    // Tallenna aktiivinen tabi URL-hashiin
    if (target === 'tekniikka' && subTab) {
        window.location.hash = target + '/' + subTab;
    } else {
        window.location.hash = target;
    }
    // Lataa sisältö tarvittaessa
    if (target === 'customers') loadCustomers();
    if (target === 'leads') loadLeads();
    if (target === 'tekniikka') {
        loadDevices(); loadSitesTab(); loadIpam();
        // Palauta sub-tab
        const validSubTabs = ['devices', 'sites', 'ipam'];
        if (subTab && validSubTabs.includes(subTab)) switchSubTab(subTab);
    }
    if (target === 'archive') loadArchive();
    if (target === 'changelog') loadChangelog();
    if (target === 'ohjeet') loadGuides();
    if (target === 'todo') { loadTodos(); if (subTab) switchTodoSubTab(subTab); }
    if (target === 'support') { loadTickets(); showTicketListView(); if (document.getElementById('ticket-auto-refresh').checked) startTicketAutoRefresh(); }
    if (target === 'documents') { loadDocuments(); showDocsListView(); }
    if (target === 'laitetilat') { loadLaitetilat(); showLaitetilatListView(); }
    if (target === 'netadmin') loadNetadmin();
    if (target === 'users') loadUsers();
    if (target === 'settings') loadSettings();
    if (target === 'companies') loadCompaniesTab();
}

document.querySelectorAll('.tab').forEach(tab => {
    tab.addEventListener('click', () => {
        switchToTab(tab.dataset.tab);
    });
});

// Logo -> Asiakkaat (alkunäkymä)
document.getElementById('brand-home').addEventListener('click', () => {
    switchToTab('customers');
});

// Käyttäjät-nappi headerissa
document.getElementById('btn-users').addEventListener('click', () => {
    document.querySelectorAll('.tab').forEach(t => t.classList.remove('active'));
    document.querySelectorAll('.tab-content').forEach(c => c.classList.remove('active'));
    document.getElementById('tab-content-users').classList.add('active');
    loadUsers();
});

document.getElementById('btn-companies').addEventListener('click', () => {
    document.querySelectorAll('.tab').forEach(t => t.classList.remove('active'));
    document.querySelectorAll('.tab-content').forEach(c => c.classList.remove('active'));
    document.getElementById('tab-content-companies').classList.add('active');
    window.location.hash = 'companies';
    loadCompaniesTab();
});

// ==================== CUSTOMERS ====================

async function loadCustomers() {
    customers = await apiCall('customers');
    renderTable();
}

function flattenRows(customerList) {
    const rows = [];
    customerList.forEach(c => {
        const liittymat = c.liittymat || [];
        if (liittymat.length === 0) {
            rows.push({ customer: c, liittyma: { asennusosoite: '', postinumero: '', kaupunki: '', liittymanopeus: '', hinta: 0, sopimuskausi: '', alkupvm: '' }, index: 0 });
        } else {
            liittymat.forEach((l, i) => rows.push({ customer: c, liittyma: l, index: i }));
        }
    });
    return rows;
}

function renderTable() {
    const query = searchInput.value.toLowerCase().trim();
    let filtered = customers;
    if (query) {
        filtered = customers.filter(c => {
            const liittymat = c.liittymat || [];
            const inL = liittymat.some(l =>
                (l.asennusosoite || '').toLowerCase().includes(query) ||
                (l.postinumero || '').toLowerCase().includes(query) ||
                (l.kaupunki || '').toLowerCase().includes(query) ||
                (l.liittymanopeus || '').toLowerCase().includes(query) ||
                (l.vlan || '').toLowerCase().includes(query) ||
                (l.laite || '').toLowerCase().includes(query) ||
                (l.portti || '').toLowerCase().includes(query) ||
                (l.ip || '').toLowerCase().includes(query)
            );
            return c.yritys.toLowerCase().includes(query) ||
                (c.yhteyshenkilö || '').toLowerCase().includes(query) || inL;
        });
    }

    const rows = flattenRows(filtered);
    rows.sort((a, b) => {
        let va, vb;
        if (['asennusosoite', 'postinumero', 'kaupunki', 'liittymanopeus', 'hinta', 'sopimuskausi'].includes(sortField)) {
            va = a.liittyma[sortField] ?? '';
            vb = b.liittyma[sortField] ?? '';
        } else {
            va = a.customer[sortField] ?? '';
            vb = b.customer[sortField] ?? '';
        }
        if (sortField === 'hinta') { va = parseFloat(va) || 0; vb = parseFloat(vb) || 0; }
        else { va = String(va).toLowerCase(); vb = String(vb).toLowerCase(); }
        if (va < vb) return sortAsc ? -1 : 1;
        if (va > vb) return sortAsc ? 1 : -1;
        return 0;
    });

    if (rows.length === 0) {
        tbody.innerHTML = '';
        noCustomers.style.display = 'block';
        document.getElementById('customer-table').style.display = 'none';
    } else {
        noCustomers.style.display = 'none';
        document.getElementById('customer-table').style.display = 'table';
        let prevId = null;
        tbody.innerHTML = rows.map(r => {
            const c = r.customer, l = r.liittyma;
            const isFirst = c.id !== prevId;
            prevId = c.id;
            const sopimusStr = contractRemaining(l.sopimuskausi, l.alkupvm);
            return `<tr data-id="${c.id}" class="${isFirst ? '' : 'sub-row'}">
                <td>${isFirst ? '<strong>' + esc(c.yritys) + '</strong>' : '<span class="sub-marker">&#8627;</span>'}</td>
                <td>${esc(l.asennusosoite)}${l.postinumero ? ', ' + esc(l.postinumero) : ''}</td>
                <td>${esc(l.kaupunki)}</td>
                <td>${esc(l.liittymanopeus)}</td>
                <td class="price-cell">${formatPrice(l.hinta)}</td>
                <td>${sopimusStr}</td>
                <td class="actions-cell">${isFirst ? `<button onclick="event.stopPropagation();editCustomer('${c.id}')" title="Muokkaa">&#9998;</button><button onclick="event.stopPropagation();deleteCustomer('${c.id}','${esc(c.yritys)}')" title="Arkistoi">&#128451;</button>` : ''}</td>
            </tr>`;
        }).join('');
    }
    updateSummary();
}

function getAllLiittymat() {
    const all = [];
    customers.forEach(c => (c.liittymat || []).forEach(l => all.push(l)));
    return all;
}

function updateSummary() {
    const liittymat = getAllLiittymat();
    const count = customers.length;
    const connCount = liittymat.length;
    const total = liittymat.reduce((sum, l) => sum + (parseFloat(l.hinta) || 0), 0);
    customerCount.textContent = `${count} asiakasta, ${connCount} liittymää`;
    totalBilling.textContent = `Laskutus yhteensä: ${formatPrice(total)}/kk`;
    setText('stat-count', count);
    setText('stat-connections', connCount);
    setText('stat-billing', formatPrice(total));
    setText('stat-yearly', formatPrice(total * 12));
    updateTrivia(liittymat, connCount);
}

function updateTrivia(liittymat, connCount) {
    if (connCount === 0) {
        setTrivia('stat-top-zip', '-', '');
        setText('stat-avg-price', '-');
        const st = document.getElementById('stat-speed-table');
        if (st) st.innerHTML = '<span style="color:#aaa;font-size:0.85rem;">-</span>';
        return;
    }
    // Postinumero
    const zipCounts = {};
    liittymat.forEach(l => { const z = (l.postinumero || '').trim(); if (z) zipCounts[z] = (zipCounts[z] || 0) + 1; });
    const topZip = Object.entries(zipCounts).sort((a, b) => b[1] - a[1])[0];
    if (topZip) {
        const city = liittymat.find(l => (l.postinumero || '').trim() === topZip[0]);
        setTrivia('stat-top-zip', topZip[0], `${topZip[1]} liittymää` + (city && city.kaupunki ? ` (${city.kaupunki})` : ''));
    } else { setTrivia('stat-top-zip', '-', ''); }
    // Nopeudet
    const speedCounts = {};
    liittymat.forEach(l => { const s = (l.liittymanopeus || '').trim(); if (s) speedCounts[s] = (speedCounts[s] || 0) + 1; });
    const speedTable = document.getElementById('stat-speed-table');
    if (speedTable) {
        const sorted = Object.entries(speedCounts).sort((a, b) => b[1] - a[1]);
        const maxC = sorted.length > 0 ? sorted[0][1] : 0;
        speedTable.innerHTML = sorted.length === 0 ? '<span style="color:#aaa;font-size:0.85rem;">-</span>' :
            sorted.map(([sp, cnt]) => {
                const isTop = cnt === maxC;
                const w = Math.max(15, (cnt / maxC) * 50);
                return `<span class="speed-item ${isTop ? 'top' : ''}">${esc(sp)} (${cnt})<span class="speed-bar" style="width:${w}px"></span></span>`;
            }).join('');
    }
    // Keskihinta
    const total = liittymat.reduce((sum, l) => sum + (parseFloat(l.hinta) || 0), 0);
    setText('stat-avg-price', formatPrice(total / connCount));
}

function setTrivia(id, value, sub) {
    const el = document.getElementById(id);
    const subEl = document.getElementById(id + '-detail');
    if (el) el.textContent = value;
    if (subEl) subEl.textContent = sub;
}
function setText(id, value) { const el = document.getElementById(id); if (el) el.textContent = value; }
function formatPrice(val) { return parseFloat(val || 0).toFixed(2).replace('.', ',') + ' €'; }

function contractRemaining(sopimuskausi, alkupvm) {
    if (!sopimuskausi) return '';
    const months = parseInt(sopimuskausi);
    if (!months || !alkupvm) return months + ' kk';
    const start = new Date(alkupvm);
    if (isNaN(start.getTime())) return months + ' kk';
    const end = new Date(start);
    end.setMonth(end.getMonth() + months);
    const now = new Date();
    const diffMs = end - now;
    if (diffMs <= 0) return `${months} kk <span style="color:#27ae60;font-size:0.8rem;">(jatkuva)</span>`;
    const remainMonths = Math.ceil(diffMs / (1000 * 60 * 60 * 24 * 30.44));
    return `${months} kk <span style="color:#888;font-size:0.8rem;">(${remainMonths} kk jäljellä)</span>`;
}

// Hintojen näyttö/piilotus
(function() {
    const toggle = document.getElementById('toggle-prices');
    if (!toggle) return;
    // Oletuksena piilossa
    document.getElementById('customer-table')?.classList.add('prices-hidden');
    toggle.addEventListener('change', () => {
        document.getElementById('customer-table')?.classList.toggle('prices-hidden', !toggle.checked);
        // Blurraa myös asiakaskortin hinnat
        document.querySelectorAll('.customer-detail-card').forEach(el => {
            el.classList.toggle('prices-hidden', !toggle.checked);
        });
    });
})();
function esc(str) { if (!str) return ''; const d = document.createElement('div'); d.textContent = str; return d.innerHTML; }

function timeAgo(dateStr) {
    if (!dateStr) return '';
    const date = new Date(dateStr.replace(' ', 'T'));
    const now = new Date();
    const diffMs = now - date;
    if (diffMs < 0) return 'juuri nyt';
    const diffSec = Math.floor(diffMs / 1000);
    if (diffSec < 60) return 'juuri nyt';
    const diffMin = Math.floor(diffSec / 60);
    if (diffMin < 60) return diffMin + ' min sitten';
    const diffHours = Math.floor(diffMin / 60);
    if (diffHours < 24) return diffHours + 'h sitten';
    const diffDays = Math.floor(diffHours / 24);
    if (diffDays < 7) return diffDays + 'pv sitten';
    if (diffDays < 30) return Math.floor(diffDays / 7) + 'vk sitten';
    // Yli kuukausi → näytä päivämäärä
    return dateStr.substring(0, 10);
}

// Search & Sort
searchInput.addEventListener('input', () => renderTable());
document.querySelectorAll('th[data-sort]').forEach(th => {
    th.addEventListener('click', () => {
        const f = th.dataset.sort;
        if (sortField === f) sortAsc = !sortAsc;
        else { sortField = f; sortAsc = true; }
        renderTable();
    });
});

// Row click
tbody.addEventListener('click', (e) => {
    const row = e.target.closest('tr');
    if (row) showDetail(row.dataset.id);
});

function detailVal(val) { return val ? esc(val) : '<span class="empty">-</span>'; }
function detailLink(val, type) {
    if (!val) return '<span class="empty">-</span>';
    if (type === 'tel') return `<a href="tel:${esc(val)}">${esc(val)}</a>`;
    if (type === 'email') return `<a href="mailto:${esc(val)}">${esc(val)}</a>`;
    return esc(val);
}

function showDetail(id) {
    const c = customers.find(x => x.id === id);
    if (!c) return;
    currentDetailId = id;
    const liittymat = c.liittymat || [];
    const fullBilling = [c.laskutusosoite, c.laskutuspostinumero, c.laskutuskaupunki].filter(Boolean).join(', ');
    const liittymatHtml = liittymat.map((l, i) => {
        const addr = [l.asennusosoite, l.postinumero, l.kaupunki].filter(Boolean).join(', ');
        return `<div class="liittyma-card">
            ${liittymat.length > 1 ? `<div class="liittyma-num">Liittymä ${i + 1}</div>` : ''}
            <div class="detail-grid">
                <div class="detail-item"><div class="detail-label">Osoite</div><div class="detail-value">${detailVal(addr)}</div></div>
                <div class="detail-item"><div class="detail-label">Nopeus</div><div class="detail-value">${detailVal(l.liittymanopeus)}</div></div>
                <div class="detail-item"><div class="detail-label">Hinta / kk</div><div class="detail-value price-cell">${formatPrice(l.hinta)}</div></div>
                <div class="detail-item"><div class="detail-label">Sopimuskausi</div><div class="detail-value">${contractRemaining(l.sopimuskausi, l.alkupvm) || '-'}</div></div>
                <div class="detail-item"><div class="detail-label">Alkaen</div><div class="detail-value">${detailVal(l.alkupvm)}</div></div>
                <div class="detail-item"><div class="detail-label">VLAN</div><div class="detail-value">${detailVal(l.vlan)}</div></div>
                <div class="detail-item"><div class="detail-label">Laite</div><div class="detail-value">${detailVal(l.laite)}</div></div>
                <div class="detail-item"><div class="detail-label">Portti</div><div class="detail-value">${detailVal(l.portti)}</div></div>
                <div class="detail-item"><div class="detail-label">IP</div><div class="detail-value">${detailVal(l.ip)}</div></div>
            </div>
        </div>`;
    }).join('');
    const totalH = liittymat.reduce((s, l) => s + (parseFloat(l.hinta) || 0), 0);

    document.getElementById('detail-title').textContent = c.yritys;
    document.getElementById('detail-body').innerHTML = `
        <div class="detail-section"><h3>Perustiedot</h3><div class="detail-grid">
            <div class="detail-item"><div class="detail-label">Yritys</div><div class="detail-value">${detailVal(c.yritys)}</div></div>
            <div class="detail-item"><div class="detail-label">Y-tunnus</div><div class="detail-value">${detailVal(c.ytunnus)}</div></div>
        </div></div>
        <div class="detail-section"><h3>Liittymät (${liittymat.length})</h3>${liittymatHtml}
            ${liittymat.length > 1 ? `<div class="liittyma-total"><span class="price-cell">${formatPrice(totalH)}/kk</span></div>` : ''}
        </div>
        <div class="detail-section"><h3>Yhteystiedot</h3><div class="detail-grid">
            <div class="detail-item"><div class="detail-label">Yhteyshenkilö</div><div class="detail-value">${detailVal(c.yhteyshenkilö)}</div></div>
            <div class="detail-item"><div class="detail-label">Puhelin</div><div class="detail-value">${detailLink(c.puhelin, 'tel')}</div></div>
            <div class="detail-item"><div class="detail-label">Sähköposti</div><div class="detail-value">${detailLink(c.sahkoposti, 'email')}</div></div>
        </div></div>
        <div class="detail-section"><h3>Laskutustiedot</h3><div class="detail-grid">
            <div class="detail-item"><div class="detail-label">Laskutusosoite</div><div class="detail-value">${detailVal(fullBilling)}</div></div>
            <div class="detail-item"><div class="detail-label">Laskutussähköposti</div><div class="detail-value">${detailLink(c.laskutussahkoposti, 'email')}</div></div>
            <div class="detail-item"><div class="detail-label">E-laskuosoite</div><div class="detail-value">${detailVal(c.elaskuosoite)}</div></div>
            <div class="detail-item"><div class="detail-label">E-laskuvälittäjä</div><div class="detail-value">${detailVal(c.elaskuvalittaja)}</div></div>
        </div></div>
        ${c.lisatiedot ? `<div class="detail-section"><h3>Lisätiedot</h3><p style="white-space:pre-wrap;color:#555;">${esc(c.lisatiedot)}</p></div>` : ''}
        <div class="detail-section"><h3>Tiedostot</h3>
            <div class="file-upload-area">
                <label class="file-upload-btn btn-primary" style="display:inline-block;cursor:pointer;font-size:0.85rem;padding:8px 16px;">
                    + Lisää tiedosto <input type="file" id="file-upload-input" style="display:none" multiple>
                </label>
                <span style="font-size:0.8rem;color:#999;margin-left:8px;">Max 20 MB / tiedosto</span>
            </div>
            <div id="file-list" class="file-list" style="margin-top:0.75rem;"></div>
        </div>`;

    // Synkronoi prices-hidden tila detail-modaliin
    const pricesHidden = document.getElementById('customer-table')?.classList.contains('prices-hidden');
    detailModal.querySelector('.modal-content')?.classList.toggle('prices-hidden', !!pricesHidden);
    detailModal.style.display = 'flex';
    loadFiles(id);
    document.getElementById('file-upload-input').addEventListener('change', async function () {
        for (const file of this.files) {
            const fd = new FormData();
            fd.append('customer_id', id);
            fd.append('file', file);
            try {
                const res = await fetch(`${API}?action=file_upload`, { method: 'POST', credentials: 'include', body: fd });
                const data = await res.json();
                if (!res.ok) alert(data.error || 'Virhe');
            } catch (e) { alert('Tiedoston lähetys epäonnistui'); }
        }
        this.value = '';
        loadFiles(id);
    });
}

async function loadFiles(customerId) {
    const fileList = document.getElementById('file-list');
    if (!fileList) return;
    try {
        const files = await apiCall(`file_list&customer_id=${customerId}`);
        if (files.length === 0) { fileList.innerHTML = '<p style="color:#aaa;font-size:0.85rem;">Ei tiedostoja.</p>'; return; }
        fileList.innerHTML = files.map(f => `<div class="file-item">
            <div class="file-info">
                <a href="${API}?action=file_download&customer_id=${customerId}&filename=${encodeURIComponent(f.filename)}" class="file-name" target="_blank">${esc(f.filename)}</a>
                <span class="file-meta">${formatFileSize(f.size)} &middot; ${f.modified}</span>
            </div>
            <button class="file-delete-btn" onclick="deleteFile('${customerId}','${esc(f.filename)}')" title="Poista">&#10005;</button>
        </div>`).join('');
    } catch (e) { fileList.innerHTML = '<p style="color:#e74c3c;font-size:0.85rem;">Virhe ladattaessa tiedostoja.</p>'; }
}

function formatFileSize(bytes) {
    if (bytes < 1024) return bytes + ' B';
    if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB';
    return (bytes / (1024 * 1024)).toFixed(1) + ' MB';
}

async function deleteFile(customerId, filename) {
    if (!confirm(`Poistetaanko tiedosto "${filename}"?`)) return;
    await apiCall('file_delete', 'POST', { customer_id: customerId, filename });
    loadFiles(customerId);
}

// Detail modal actions
document.getElementById('detail-close').addEventListener('click', () => detailModal.style.display = 'none');
document.getElementById('detail-cancel').addEventListener('click', () => detailModal.style.display = 'none');
document.getElementById('detail-edit').addEventListener('click', () => { detailModal.style.display = 'none'; editCustomer(currentDetailId); });
document.getElementById('detail-delete').addEventListener('click', () => {
    const c = customers.find(x => x.id === currentDetailId);
    if (c) { detailModal.style.display = 'none'; deleteCustomer(currentDetailId, c.yritys); }
});

// ==================== FORM: Liittymät ====================

function createLiittymaRow(data = {}, index = 0) {
    const div = document.createElement('div');
    div.className = 'liittyma-row';
    div.dataset.index = index;
    div.innerHTML = `<div class="liittyma-row-header">
        <span class="liittyma-row-title">Liittymä ${index + 1}</span>
        <button type="button" class="btn-remove-row" title="Poista liittymä">&#10005;</button>
    </div>
    <div class="form-grid form-grid-liittyma">
        <div class="form-group"><label>Osoite</label><input type="text" class="l-asennusosoite" value="${esc(data.asennusosoite || '')}" placeholder="esim. Esimerkkikatu 1"></div>
        <div class="form-group"><label>Postinumero</label><input type="text" class="l-postinumero" value="${esc(data.postinumero || '')}" placeholder="00100"></div>
        <div class="form-group"><label>Kaupunki</label><input type="text" class="l-kaupunki" value="${esc(data.kaupunki || '')}" placeholder="Helsinki"></div>
        <div class="form-group"><label>Nopeus</label><input type="text" class="l-liittymanopeus" value="${esc(data.liittymanopeus || '')}" placeholder="esim. 100/100"></div>
        <div class="form-group"><label>Hinta €/kk</label><input type="number" class="l-hinta" step="0.01" min="0" value="${data.hinta || ''}"></div>
        <div class="form-group"><label>Sopimuskausi</label><select class="l-sopimuskausi">
            <option value="">- Valitse -</option>
            <option value="1" ${data.sopimuskausi === '1' ? 'selected' : ''}>1 kk</option>
            <option value="12" ${data.sopimuskausi === '12' ? 'selected' : ''}>12 kk</option>
            <option value="24" ${data.sopimuskausi === '24' ? 'selected' : ''}>24 kk</option>
            <option value="36" ${data.sopimuskausi === '36' ? 'selected' : ''}>36 kk</option>
        </select></div>
        <div class="form-group"><label>Alkaen</label><input type="date" class="l-alkupvm" value="${esc(data.alkupvm || '')}"></div>
        <div class="form-group"><label>VLAN</label><input type="text" class="l-vlan" value="${esc(data.vlan || '')}" placeholder="esim. 100"></div>
        <div class="form-group"><label>Laite</label><input type="text" class="l-laite" value="${esc(data.laite || '')}" placeholder="esim. SW-CORE-01"></div>
        <div class="form-group"><label>Portti</label><input type="text" class="l-portti" value="${esc(data.portti || '')}" placeholder="esim. Gi0/1"></div>
        <div class="form-group"><label>IP</label><input type="text" class="l-ip" value="${esc(data.ip || '')}" placeholder="esim. 10.0.0.5"></div>
    </div>`;
    div.querySelector('.btn-remove-row').addEventListener('click', () => { div.remove(); renumberLiittymaRows(); });
    return div;
}

function renumberLiittymaRows() {
    document.getElementById('liittymat-container').querySelectorAll('.liittyma-row').forEach((row, i) => {
        row.dataset.index = i;
        row.querySelector('.liittyma-row-title').textContent = `Liittymä ${i + 1}`;
    });
}

function collectLiittymatFromForm() {
    return Array.from(document.getElementById('liittymat-container').querySelectorAll('.liittyma-row')).map(row => ({
        asennusosoite: row.querySelector('.l-asennusosoite').value,
        postinumero: row.querySelector('.l-postinumero').value,
        kaupunki: row.querySelector('.l-kaupunki').value,
        liittymanopeus: row.querySelector('.l-liittymanopeus').value,
        hinta: row.querySelector('.l-hinta').value,
        sopimuskausi: row.querySelector('.l-sopimuskausi').value,
        alkupvm: row.querySelector('.l-alkupvm').value,
        vlan: row.querySelector('.l-vlan').value,
        laite: row.querySelector('.l-laite').value,
        portti: row.querySelector('.l-portti').value,
        ip: row.querySelector('.l-ip').value,
    }));
}

document.getElementById('btn-add-liittyma').addEventListener('click', () => {
    const container = document.getElementById('liittymat-container');
    container.appendChild(createLiittymaRow({}, container.querySelectorAll('.liittyma-row').length));
});

document.getElementById('form-billing-same').addEventListener('change', function () {
    const bf = document.getElementById('billing-fields');
    if (this.checked) {
        bf.style.display = 'none';
        const first = document.querySelector('.liittyma-row');
        if (first) {
            document.getElementById('form-laskutusosoite').value = first.querySelector('.l-asennusosoite').value;
            document.getElementById('form-laskutuspostinumero').value = first.querySelector('.l-postinumero').value;
            document.getElementById('form-laskutuskaupunki').value = first.querySelector('.l-kaupunki').value;
        }
    } else { bf.style.display = 'block'; }
});

// Add/Edit modal
document.getElementById('btn-add').addEventListener('click', () => openCustomerForm());
document.getElementById('modal-close').addEventListener('click', () => customerModal.style.display = 'none');
document.getElementById('form-cancel').addEventListener('click', () => customerModal.style.display = 'none');

function openCustomerForm(customer = null) {
    const c = customer;
    document.getElementById('modal-title').textContent = c ? 'Muokkaa asiakasta' : 'Lisää asiakas';
    document.getElementById('form-submit').textContent = c ? 'Päivitä' : 'Tallenna';
    document.getElementById('form-id').value = c ? c.id : '';
    document.getElementById('form-yritys').value = c ? c.yritys : '';
    document.getElementById('form-ytunnus').value = c ? (c.ytunnus || '') : '';
    document.getElementById('form-yhteyshenkilo').value = c ? (c.yhteyshenkilö || '') : '';
    document.getElementById('form-puhelin').value = c ? (c.puhelin || '') : '';
    document.getElementById('form-sahkoposti').value = c ? (c.sahkoposti || '') : '';
    document.getElementById('form-laskutusosoite').value = c ? (c.laskutusosoite || '') : '';
    document.getElementById('form-laskutuspostinumero').value = c ? (c.laskutuspostinumero || '') : '';
    document.getElementById('form-laskutuskaupunki').value = c ? (c.laskutuskaupunki || '') : '';
    document.getElementById('form-laskutussahkoposti').value = c ? (c.laskutussahkoposti || '') : '';
    document.getElementById('form-elaskuosoite').value = c ? (c.elaskuosoite || '') : '';
    document.getElementById('form-elaskuvalittaja').value = c ? (c.elaskuvalittaja || '') : '';
    document.getElementById('form-lisatiedot').value = c ? (c.lisatiedot || '') : '';
    document.getElementById('form-priority-emails').value = c ? (c.priority_emails || '') : '';
    document.getElementById('form-billing-same').checked = false;
    document.getElementById('billing-fields').style.display = 'block';
    const container = document.getElementById('liittymat-container');
    container.innerHTML = '';
    (c ? (c.liittymat || []) : [{}]).forEach((l, i) => container.appendChild(createLiittymaRow(l, i)));
    customerModal.style.display = 'flex';
    document.getElementById('form-yritys').focus();
}

function editCustomer(id) { const c = customers.find(x => x.id === id); if (c) openCustomerForm(c); }

async function deleteCustomer(id, name) {
    if (!confirm(`Arkistoidaanko asiakas "${name}"?\n\nAsiakas siirretään arkistoon, josta sen voi palauttaa.`)) return;
    await apiCall('customer_delete', 'POST', { id });
    await loadCustomers();
}

customerForm.addEventListener('submit', async (e) => {
    e.preventDefault();
    const id = document.getElementById('form-id').value;
    if (document.getElementById('form-billing-same').checked) {
        const first = document.querySelector('.liittyma-row');
        if (first) {
            document.getElementById('form-laskutusosoite').value = first.querySelector('.l-asennusosoite').value;
            document.getElementById('form-laskutuspostinumero').value = first.querySelector('.l-postinumero').value;
            document.getElementById('form-laskutuskaupunki').value = first.querySelector('.l-kaupunki').value;
        }
    }
    const data = {
        yritys: document.getElementById('form-yritys').value,
        ytunnus: document.getElementById('form-ytunnus').value,
        yhteyshenkilö: document.getElementById('form-yhteyshenkilo').value,
        puhelin: document.getElementById('form-puhelin').value,
        sahkoposti: document.getElementById('form-sahkoposti').value,
        laskutusosoite: document.getElementById('form-laskutusosoite').value,
        laskutuspostinumero: document.getElementById('form-laskutuspostinumero').value,
        laskutuskaupunki: document.getElementById('form-laskutuskaupunki').value,
        laskutussahkoposti: document.getElementById('form-laskutussahkoposti').value,
        elaskuosoite: document.getElementById('form-elaskuosoite').value,
        elaskuvalittaja: document.getElementById('form-elaskuvalittaja').value,
        lisatiedot: document.getElementById('form-lisatiedot').value,
        priority_emails: document.getElementById('form-priority-emails').value,
        liittymat: collectLiittymatFromForm(),
    };
    if (id) { data.id = id; await apiCall('customer_update', 'POST', data); }
    else { await apiCall('customer', 'POST', data); }
    customerModal.style.display = 'none';
    await loadCustomers();
});

// ==================== LEADS ====================

let leads = [];
let currentLeadId = null;
const leadModal = document.getElementById('lead-modal');
const leadDetailModal = document.getElementById('lead-detail-modal');

const leadStatusLabels = {
    uusi: 'Uusi',
    kontaktoitu: 'Kontaktoitu',
    kiinnostunut: 'Kiinnostunut',
    odottaa: 'Odottaa toimitusta',
    ei_kiinnosta: 'Ei kiinnosta',
};

async function loadLeads() {
    try {
        leads = await apiCall('leads');
        renderLeads();
    } catch (e) { console.error(e); }
}

function renderLeads() {
    const query = document.getElementById('lead-search-input').value.toLowerCase().trim();
    let filtered = leads;
    if (query) {
        filtered = leads.filter(l =>
            (l.yritys || '').toLowerCase().includes(query) ||
            (l.yhteyshenkilo || '').toLowerCase().includes(query) ||
            (l.kaupunki || '').toLowerCase().includes(query)
        );
    }
    const ltbody = document.getElementById('leads-tbody');
    const noLeads = document.getElementById('no-leads');
    if (filtered.length === 0) {
        ltbody.innerHTML = '';
        noLeads.style.display = 'block';
        document.getElementById('leads-table').style.display = 'none';
    } else {
        noLeads.style.display = 'none';
        document.getElementById('leads-table').style.display = 'table';
        ltbody.innerHTML = filtered.map(l => `<tr data-lead-id="${l.id}">
            <td><strong>${esc(l.yritys)}</strong></td>
            <td>${esc(l.yhteyshenkilo || '')}</td>
            <td>${esc(l.kaupunki || '')}</td>
            <td><span class="lead-status lead-status-${l.tila || 'uusi'}">${leadStatusLabels[l.tila] || l.tila || 'Uusi'}</span></td>
            <td class="nowrap">${esc((l.luotu || '').substring(0, 10))}</td>
            <td class="actions-cell">
                <button onclick="event.stopPropagation();editLead('${l.id}')" title="Muokkaa">&#9998;</button>
                <button onclick="event.stopPropagation();deleteLead('${l.id}','${esc(l.yritys)}')" title="Poista">&#128465;</button>
            </td>
        </tr>`).join('');
    }
    document.getElementById('lead-count').textContent = `${leads.length} liidiä`;
}

document.getElementById('lead-search-input').addEventListener('input', () => renderLeads());

document.getElementById('leads-tbody').addEventListener('click', (e) => {
    const row = e.target.closest('tr');
    if (row && row.dataset.leadId) showLeadDetail(row.dataset.leadId);
});

function showLeadDetail(id) {
    const l = leads.find(x => x.id === id);
    if (!l) return;
    currentLeadId = id;
    document.getElementById('lead-detail-title').textContent = l.yritys;
    document.getElementById('lead-detail-body').innerHTML = `
        <div style="padding:1.5rem;">
            <div class="detail-grid">
                <div class="detail-item"><div class="detail-label">Yritys</div><div class="detail-value">${detailVal(l.yritys)}</div></div>
                <div class="detail-item"><div class="detail-label">Tila</div><div class="detail-value"><span class="lead-status lead-status-${l.tila || 'uusi'}">${leadStatusLabels[l.tila] || 'Uusi'}</span></div></div>
                <div class="detail-item"><div class="detail-label">Yhteyshenkilö</div><div class="detail-value">${detailVal(l.yhteyshenkilo)}</div></div>
                <div class="detail-item"><div class="detail-label">Puhelin</div><div class="detail-value">${detailLink(l.puhelin, 'tel')}</div></div>
                <div class="detail-item"><div class="detail-label">Sähköposti</div><div class="detail-value">${detailLink(l.sahkoposti, 'email')}</div></div>
                <div class="detail-item"><div class="detail-label">Osoite</div><div class="detail-value">${detailVal([l.osoite, l.kaupunki].filter(Boolean).join(', '))}</div></div>
                <div class="detail-item"><div class="detail-label">Lisätty</div><div class="detail-value">${detailVal(l.luotu)} (${esc(l.luoja || '')})</div></div>
                ${l.muokattu ? `<div class="detail-item"><div class="detail-label">Muokattu</div><div class="detail-value">${timeAgo(l.muokattu)} (${esc(l.muokkaaja || '')})</div></div>` : ''}
            </div>
            ${l.muistiinpanot ? `<div style="margin-top:1.25rem;"><div class="detail-label" style="margin-bottom:0.5rem;">MUISTIINPANOT</div><div style="white-space:pre-wrap;color:#555;background:#f8f9fb;padding:1rem;border-radius:8px;border:1px solid #e8ebf0;font-size:0.9rem;">${esc(l.muistiinpanot)}</div></div>` : ''}
        </div>`;
    leadDetailModal.style.display = 'flex';
}

// Lead form
document.getElementById('btn-add-lead').addEventListener('click', () => openLeadForm());
document.getElementById('lead-modal-close').addEventListener('click', () => leadModal.style.display = 'none');
document.getElementById('lead-form-cancel').addEventListener('click', () => leadModal.style.display = 'none');

function openLeadForm(lead = null) {
    document.getElementById('lead-modal-title').textContent = lead ? 'Muokkaa liidiä' : 'Lisää liidi';
    document.getElementById('lead-form-submit').textContent = lead ? 'Päivitä' : 'Tallenna';
    document.getElementById('lead-form-id').value = lead ? lead.id : '';
    document.getElementById('lead-form-yritys').value = lead ? lead.yritys : '';
    document.getElementById('lead-form-yhteyshenkilo').value = lead ? (lead.yhteyshenkilo || '') : '';
    document.getElementById('lead-form-puhelin').value = lead ? (lead.puhelin || '') : '';
    document.getElementById('lead-form-sahkoposti').value = lead ? (lead.sahkoposti || '') : '';
    document.getElementById('lead-form-osoite').value = lead ? (lead.osoite || '') : '';
    document.getElementById('lead-form-kaupunki').value = lead ? (lead.kaupunki || '') : '';
    document.getElementById('lead-form-tila').value = lead ? (lead.tila || 'uusi') : 'uusi';
    document.getElementById('lead-form-muistiinpanot').value = lead ? (lead.muistiinpanot || '') : '';
    leadModal.style.display = 'flex';
    document.getElementById('lead-form-yritys').focus();
}

function editLead(id) {
    const l = leads.find(x => x.id === id);
    if (l) { leadDetailModal.style.display = 'none'; openLeadForm(l); }
}

async function deleteLead(id, name) {
    if (!confirm(`Poistetaanko liidi "${name}"?`)) return;
    await apiCall('lead_delete', 'POST', { id });
    leadDetailModal.style.display = 'none';
    await loadLeads();
}

async function convertLeadToCustomer(id) {
    const l = leads.find(x => x.id === id);
    if (!l) return;
    if (!confirm(`Muutetaanko "${l.yritys}" asiakkaaksi?\n\nLiidi poistetaan ja asiakas luodaan sen tiedoilla.`)) return;
    await apiCall('lead_to_customer', 'POST', { id });
    leadDetailModal.style.display = 'none';
    await loadLeads();
    await loadCustomers();
}

document.getElementById('lead-form').addEventListener('submit', async (e) => {
    e.preventDefault();
    const id = document.getElementById('lead-form-id').value;
    const data = {
        yritys: document.getElementById('lead-form-yritys').value,
        yhteyshenkilo: document.getElementById('lead-form-yhteyshenkilo').value,
        puhelin: document.getElementById('lead-form-puhelin').value,
        sahkoposti: document.getElementById('lead-form-sahkoposti').value,
        osoite: document.getElementById('lead-form-osoite').value,
        kaupunki: document.getElementById('lead-form-kaupunki').value,
        tila: document.getElementById('lead-form-tila').value,
        muistiinpanot: document.getElementById('lead-form-muistiinpanot').value,
    };
    if (id) { data.id = id; await apiCall('lead_update', 'POST', data); }
    else { await apiCall('lead_create', 'POST', data); }
    leadModal.style.display = 'none';
    await loadLeads();
});

// Lead detail actions
document.getElementById('lead-detail-close').addEventListener('click', () => leadDetailModal.style.display = 'none');
document.getElementById('lead-detail-cancel').addEventListener('click', () => leadDetailModal.style.display = 'none');
document.getElementById('lead-detail-edit').addEventListener('click', () => editLead(currentLeadId));
document.getElementById('lead-detail-delete').addEventListener('click', () => {
    const l = leads.find(x => x.id === currentLeadId);
    if (l) deleteLead(currentLeadId, l.yritys);
});
document.getElementById('lead-detail-convert').addEventListener('click', () => convertLeadToCustomer(currentLeadId));

// ==================== ARCHIVE ====================

async function loadArchive() {
    try {
        const archive = await apiCall('archived_customers');
        const atbody = document.getElementById('archive-tbody');
        const noArc = document.getElementById('no-archive');
        if (archive.length === 0) {
            atbody.innerHTML = '';
            noArc.style.display = 'block';
            document.getElementById('archive-table').style.display = 'none';
        } else {
            noArc.style.display = 'none';
            document.getElementById('archive-table').style.display = 'table';
            atbody.innerHTML = archive.map(c => `<tr>
                <td><strong>${esc(c.yritys)}</strong></td>
                <td>${(c.liittymat || []).length}</td>
                <td>${esc(c.arkistoitu || '')}</td>
                <td>${esc(c.arkistoija || '')}</td>
                <td class="actions-cell">
                    <button onclick="restoreCustomer('${c.id}')" class="btn-small btn-restore" title="Palauta">&#8634; Palauta</button>
                    ${currentUser.role === 'admin' ? `<button onclick="permanentDelete('${c.id}','${esc(c.yritys)}')" class="btn-small btn-perm-delete" title="Poista pysyvästi">&#10005; Poista</button>` : ''}
                </td>
            </tr>`).join('');
        }
    } catch (e) { console.error(e); }
}

async function restoreCustomer(id) {
    if (!confirm('Palautetaanko asiakas arkistosta?')) return;
    await apiCall('customer_restore', 'POST', { id });
    loadArchive();
    loadCustomers();
}

async function permanentDelete(id, name) {
    if (!confirm(`Poistetaanko "${name}" PYSYVÄSTI?\n\nTätä ei voi perua!`)) return;
    await apiCall('customer_permanent_delete', 'POST', { id });
    loadArchive();
}

// ==================== CHANGELOG ====================

const actionLabels = {
    customer_create: 'Lisäsi asiakkaan',
    customer_update: 'Muokkasi asiakasta',
    customer_archive: 'Arkistoi asiakkaan',
    customer_restore: 'Palautti asiakkaan',
    customer_permanent_delete: 'Poisti pysyvästi',
    user_create: 'Lisäsi käyttäjän',
    user_update: 'Muokkasi käyttäjää',
    user_delete: 'Poisti käyttäjän',
    lead_create: 'Lisäsi liidin',
    lead_update: 'Muokkasi liidiä',
    lead_delete: 'Poisti liidin',
    lead_to_customer: 'Muutti liidin asiakkaaksi',
    config_update: 'Päivitti asetukset',
    ticket_fetch: 'Haki sähköpostit',
    ticket_reply: 'Vastasi tikettiin',
    ticket_status: 'Muutti tiketin tilaa',
    ticket_assign: 'Osoitti tiketin',
    ticket_note: 'Lisäsi muistiinpanon',
    ticket_delete: 'Poisti tiketin',
    ticket_customer: 'Linkitti tiketin asiakkaaseen',
    ticket_type: 'Muutti tiketin tyyppiä',
};

async function loadChangelog() {
    try {
        const log = await apiCall('changelog&limit=200');
        const ctbody = document.getElementById('changelog-tbody');
        const noLog = document.getElementById('no-changelog');
        if (log.length === 0) {
            ctbody.innerHTML = '';
            noLog.style.display = 'block';
            document.getElementById('changelog-table').style.display = 'none';
        } else {
            noLog.style.display = 'none';
            document.getElementById('changelog-table').style.display = 'table';
            ctbody.innerHTML = log.map(e => `<tr>
                <td class="nowrap">${esc(e.timestamp)}</td>
                <td><strong>${esc(e.user)}</strong></td>
                <td>${actionLabels[e.action] || esc(e.action)}</td>
                <td>${esc(e.customer_name)}</td>
                <td class="text-muted">${esc(e.details)}</td>
            </tr>`).join('');
        }
    } catch (e) { console.error(e); }
}

// ==================== USERS ====================

async function loadUsers() {
    try {
        const users = await apiCall('users');
        const utbody = document.getElementById('users-tbody');
        utbody.innerHTML = users.map(u => `<tr>
            <td><strong>${esc(u.username)}</strong></td>
            <td>${esc(u.nimi)}</td>
            <td>${esc(u.email || '')}</td>
            <td><span class="role-badge role-${u.role}">${u.role === 'superadmin' ? 'Pääkäyttäjä' : (u.role === 'admin' ? 'Yritysadmin' : 'Käyttäjä')}</span></td>
            <td>${esc(u.luotu)}</td>
            <td class="actions-cell">
                <button onclick="editUser('${u.id}')" title="Muokkaa">&#9998;</button>
                ${u.id !== '${currentUser.id}' ? `<button onclick="deleteUser('${u.id}','${esc(u.username)}')" title="Poista">&#128465;</button>` : ''}
            </td>
        </tr>`).join('');
    } catch (e) { console.error(e); }
}

let usersCache = [];
document.getElementById('btn-add-user').addEventListener('click', () => openUserForm());
document.getElementById('user-modal-close').addEventListener('click', () => userModal.style.display = 'none');
document.getElementById('user-form-cancel').addEventListener('click', () => userModal.style.display = 'none');

function openUserForm(user = null) {
    document.getElementById('user-modal-title').textContent = user ? 'Muokkaa käyttäjää' : 'Lisää käyttäjä';
    document.getElementById('user-form-id').value = user ? user.id : '';
    document.getElementById('user-form-username').value = user ? user.username : '';
    document.getElementById('user-form-username').disabled = !!user;
    document.getElementById('user-form-nimi').value = user ? user.nimi : '';
    document.getElementById('user-form-email').value = user ? (user.email || '') : '';
    document.getElementById('user-form-password').value = '';
    document.getElementById('user-pw-hint').textContent = user ? '(jätä tyhjäksi jos ei muuteta)' : '*';
    document.getElementById('user-form-role').value = user ? user.role : 'user';
    // Piilota superadmin-vaihtoehto ellei ole superadmin
    const saOption = document.querySelector('#user-form-role option[value="superadmin"]');
    if (saOption) saOption.style.display = currentUser?.role === 'superadmin' ? '' : 'none';
    // Piilota yrityscheckboxit adminilta (näkee vain oman yrityksen)
    const compSection = document.getElementById('user-company-checkboxes')?.closest('.form-group');
    if (compSection) compSection.style.display = currentUser?.role === 'superadmin' ? '' : 'none';
    // Yrityscheckboxit
    const allComps = availableCompanies.length > 0 ? availableCompanies : [];
    const userComps = user ? (user.companies || []) : [];
    const container = document.getElementById('user-company-checkboxes');
    // Hae kaikki yritykset admin-näkymää varten
    apiCall('companies_all').then(companies => {
        container.innerHTML = companies.map(c =>
            `<label style="display:flex;align-items:center;gap:0.3rem;cursor:pointer;">
                <input type="checkbox" class="user-company-cb" value="${c.id}" ${userComps.includes(c.id) ? 'checked' : ''}>
                ${esc(c.nimi)}
            </label>`
        ).join('');
    }).catch(() => {
        container.innerHTML = allComps.map(c =>
            `<label style="display:flex;align-items:center;gap:0.3rem;cursor:pointer;">
                <input type="checkbox" class="user-company-cb" value="${c.id}" ${userComps.includes(c.id) ? 'checked' : ''}>
                ${esc(c.nimi)}
            </label>`
        ).join('');
    });
    // Allekirjoitukset per postilaatikko
    const sigSection = document.getElementById('user-signatures-section');
    const sigList = document.getElementById('user-signatures-list');
    const userSigs = user ? (user.signatures || {}) : {};
    apiCall('all_mailboxes').then(mailboxes => {
        if (mailboxes.length === 0) {
            sigSection.style.display = 'none';
            return;
        }
        sigSection.style.display = '';
        sigList.innerHTML = mailboxes.map(mb =>
            `<div style="margin-bottom:0.75rem;">
                <label style="font-weight:600;font-size:0.85rem;color:#333;">${esc(mb.company_nimi)} — ${esc(mb.nimi)}</label>
                <textarea class="sig-textarea" data-mailbox-id="${mb.id}" rows="3"
                    style="width:100%;margin-top:0.25rem;padding:8px;border:1px solid #ddd;border-radius:6px;font-size:0.85rem;font-family:inherit;resize:vertical;"
                    placeholder="esim.\nJukka\nYritys Oy\ninfo@yritys.fi">${esc(userSigs[mb.id] || '')}</textarea>
            </div>`
        ).join('');
    }).catch(() => {
        sigSection.style.display = 'none';
    });
    userModal.style.display = 'flex';
}

async function editUser(id) {
    try {
        const users = await apiCall('users');
        const u = users.find(x => x.id === id);
        if (u) openUserForm(u);
    } catch (e) { alert(e.message); }
}

async function deleteUser(id, username) {
    if (!confirm(`Poistetaanko käyttäjä "${username}"?`)) return;
    try {
        await apiCall('user_delete', 'POST', { id });
        loadUsers();
    } catch (e) { alert(e.message); }
}

document.getElementById('user-form').addEventListener('submit', async (e) => {
    e.preventDefault();
    const id = document.getElementById('user-form-id').value;
    const companies = [...document.querySelectorAll('.user-company-cb:checked')].map(cb => cb.value);
    // Kerää allekirjoitukset
    const signatures = {};
    document.querySelectorAll('.sig-textarea').forEach(ta => {
        const mbId = ta.dataset.mailboxId;
        const val = ta.value.trim();
        if (val) signatures[mbId] = val;
    });
    const data = {
        username: document.getElementById('user-form-username').value,
        nimi: document.getElementById('user-form-nimi').value,
        email: document.getElementById('user-form-email').value,
        role: document.getElementById('user-form-role').value,
        companies,
        signatures,
    };
    const pw = document.getElementById('user-form-password').value;
    if (pw) data.password = pw;
    else if (!id) { alert('Salasana vaaditaan uudelle käyttäjälle'); return; }
    try {
        if (id) { data.id = id; await apiCall('user_update', 'POST', data); }
        else { await apiCall('user_create', 'POST', data); }
        userModal.style.display = 'none';
        loadUsers();
        // Päivitä omat allekirjoitukset (check_auth palauttaa tuoreet)
        const auth = await apiCall('check_auth');
        if (auth.authenticated) {
            currentUser = { username: auth.username, nimi: auth.nimi, role: auth.role, id: auth.user_id };
            currentUserSignatures = auth.signatures || {};
        }
    } catch (e) { alert(e.message); }
});

// ==================== OMA PROFIILI ====================

const profileModal = document.getElementById('profile-modal');
document.getElementById('btn-profile').addEventListener('click', openProfileModal);
document.getElementById('user-info').addEventListener('click', openProfileModal);
document.getElementById('profile-modal-close').addEventListener('click', () => profileModal.style.display = 'none');
document.getElementById('profile-form-cancel').addEventListener('click', () => profileModal.style.display = 'none');

async function openProfileModal() {
    // Hae tuoreet tiedot
    const auth = await apiCall('check_auth');
    if (!auth.authenticated) return;
    document.getElementById('profile-username').value = auth.username;
    document.getElementById('profile-nimi').value = auth.nimi || '';
    document.getElementById('profile-email').value = auth.email || '';
    document.getElementById('profile-password').value = '';
    // Allekirjoitukset
    const sigSection = document.getElementById('profile-signatures-section');
    const sigList = document.getElementById('profile-signatures-list');
    const userSigs = auth.signatures || {};
    try {
        const mailboxes = await apiCall('all_mailboxes');
        if (mailboxes.length === 0) {
            sigSection.style.display = 'none';
        } else {
            sigSection.style.display = '';
            sigList.innerHTML = mailboxes.map(mb =>
                `<div style="margin-bottom:0.75rem;">
                    <label style="font-weight:600;font-size:0.85rem;color:#333;">${esc(mb.company_nimi)} — ${esc(mb.nimi)}</label>
                    <textarea class="profile-sig-textarea" data-mailbox-id="${mb.id}" rows="3"
                        style="width:100%;margin-top:0.25rem;padding:8px;border:1px solid #ddd;border-radius:6px;font-size:0.85rem;font-family:inherit;resize:vertical;"
                        placeholder="esim.\nNimi\nYritys Oy\ninfo@yritys.fi">${esc(userSigs[mb.id] || '')}</textarea>
                </div>`
            ).join('');
        }
    } catch {
        sigSection.style.display = 'none';
    }
    profileModal.style.display = 'flex';
}

document.getElementById('profile-form').addEventListener('submit', async (e) => {
    e.preventDefault();
    const signatures = {};
    document.querySelectorAll('.profile-sig-textarea').forEach(ta => {
        const mbId = ta.dataset.mailboxId;
        const val = ta.value.trim();
        if (val) signatures[mbId] = val;
    });
    const data = {
        nimi: document.getElementById('profile-nimi').value,
        email: document.getElementById('profile-email').value,
        signatures,
    };
    const pw = document.getElementById('profile-password').value;
    if (pw) data.password = pw;
    try {
        await apiCall('profile_update', 'POST', data);
        // Päivitä UI
        const auth = await apiCall('check_auth');
        if (auth.authenticated) {
            currentUser = { username: auth.username, nimi: auth.nimi, role: auth.role, id: auth.user_id };
            currentUserSignatures = auth.signatures || {};
            document.getElementById('user-info').textContent = auth.nimi || auth.username;
        }
        profileModal.style.display = 'none';
        alert('Profiili päivitetty!');
    } catch (e) { alert(e.message); }
});


// ==================== TICKETS (ASIAKASPALVELU) ====================

let tickets = [];
let currentTicketId = null;
let ticketReplyType = 'reply';

const ticketStatusLabels = {
    uusi: 'Uusi',
    kasittelyssa: 'Käsittelyssä',
    odottaa: 'Odottaa vastausta',
    suljettu: 'Suljettu',
};

const ticketTypeLabels = {
    laskutus: 'Laskutus',
    tekniikka: 'Tekniikka',
    vika: 'Vika',
    muu: 'Muu',
};

async function loadTickets() {
    try {
        // Hae kaikkien yritysten tiketit jos useampi yritys
        const allParam = availableCompanies.length > 1 ? '&all=1' : '';
        tickets = await apiCall('tickets' + allParam);
        renderTickets();
    } catch (e) { console.error(e); }
}

function renderTickets() {
    const query = document.getElementById('ticket-search-input').value.toLowerCase().trim();
    const statusFilter = document.getElementById('ticket-status-filter').value;
    const typeFilter = document.getElementById('ticket-type-filter').value;
    const showClosed = document.getElementById('ticket-show-closed').checked;
    let filtered = tickets;

    // Suljetut näkyvät vain kun täppä on päällä
    if (showClosed) {
        filtered = filtered.filter(t => t.status === 'suljettu');
    } else {
        filtered = filtered.filter(t => t.status !== 'suljettu');
        if (statusFilter) {
            filtered = filtered.filter(t => t.status === statusFilter);
        }
    }

    if (typeFilter) {
        filtered = filtered.filter(t => (t.type || 'muu') === typeFilter);
    }

    // Tag filter
    const tagFilter = (document.getElementById('ticket-tag-filter').value || '').trim().toLowerCase().replace(/^#/, '');
    if (tagFilter) {
        filtered = filtered.filter(t => (t.tags || []).some(tag => tag.toLowerCase().includes(tagFilter)));
    }

    if (query) {
        filtered = filtered.filter(t =>
            (t.subject || '').toLowerCase().includes(query) ||
            (t.from_name || '').toLowerCase().includes(query) ||
            (t.from_email || '').toLowerCase().includes(query) ||
            (t.tags || []).some(tag => tag.toLowerCase().includes(query))
        );
    }

    // Sorttaus: prioriteetti → tila → päivämäärä
    const ticketSortField = document.getElementById('ticket-sort')?.value || 'status';
    const statusPriority = { kasittelyssa: 0, uusi: 1, odottaa: 2, suljettu: 3 };
    const priorityOrder = { urgent: 0, 'tärkeä': 1, normaali: 2 };
    filtered.sort((a, b) => {
        // Urgent/tärkeä aina ensin
        const prioA = priorityOrder[a.priority || 'normaali'] ?? 2;
        const prioB = priorityOrder[b.priority || 'normaali'] ?? 2;
        if (prioA !== prioB) return prioA - prioB;

        if (ticketSortField === 'status') {
            const pa = statusPriority[a.status] ?? 9;
            const pb = statusPriority[b.status] ?? 9;
            if (pa !== pb) return pa - pb;
            return (b.updated || '').localeCompare(a.updated || '');
        } else if (ticketSortField === 'updated') {
            return (b.updated || '').localeCompare(a.updated || '');
        } else if (ticketSortField === 'created') {
            return (b.created || '').localeCompare(a.created || '');
        }
        return 0;
    });

    const ttbody = document.getElementById('tickets-tbody');
    const noTickets = document.getElementById('no-tickets');
    if (filtered.length === 0) {
        ttbody.innerHTML = '';
        noTickets.style.display = 'block';
        document.getElementById('tickets-table').style.display = 'none';
    } else {
        noTickets.style.display = 'none';
        document.getElementById('tickets-table').style.display = 'table';
        const multiCompany = availableCompanies.length > 1;
        ttbody.innerHTML = filtered.map(t => {
            const lastType = t.last_message_type === 'reply_out' ? '&#8594;' : (t.last_message_type === 'note' ? '&#128221;' : '&#8592;');
            const typeLabel = ticketTypeLabels[t.type] || 'Muu';
            const rowClass = t.priority === 'urgent' ? 'ticket-row-urgent' : (t.priority === 'tärkeä' ? 'ticket-row-important' : (t.status === 'kasittelyssa' ? 'ticket-row-active' : ''));
            const checked = bulkSelectedIds.has(t.id) ? 'checked' : '';
            const companyBadge = multiCompany && t.company_name ? `<span class="company-badge">${esc(t.company_name)}</span> ` : '';
            const prioBadge = t.priority === 'urgent' ? '<span class="ticket-prio-urgent">🚨</span> ' : (t.priority === 'tärkeä' ? '<span class="ticket-prio-important">⚠️</span> ' : '');
            return `<tr data-ticket-id="${t.id}" data-company-id="${t.company_id || ''}" class="${rowClass}">
                <td onclick="event.stopPropagation()"><input type="checkbox" class="ticket-checkbox" data-ticket-id="${t.id}" ${checked}></td>
                <td><span class="ticket-status ticket-status-${t.status}">${ticketStatusLabels[t.status] || t.status}</span></td>
                <td>${t.customer_name ? esc(t.customer_name) : '<span style="color:#ccc;">-</span>'}</td>
                <td><span class="ticket-type ticket-type-${t.type || 'muu'}">${typeLabel}</span></td>
                <td>${prioBadge}${companyBadge}${t.ticket_number ? `<span style="color:#888;font-size:0.8rem;margin-right:0.3rem;">#${t.ticket_number}</span>` : ''}<strong>${esc(t.subject)}</strong></td>
                <td>${esc(t.mailbox_name || t.from_name || t.from_email)}</td>
                <td style="text-align:center;">${lastType} ${t.message_count}</td>
                <td class="nowrap" title="${esc((t.updated || '').substring(0, 16))}">${timeAgo(t.updated)}</td>
                <td>${t.assigned_to ? esc(t.assigned_to) : '<span style="color:#ccc;">—</span>'}</td>
            </tr>`;
        }).join('');
        // Re-attach checkbox listeners
        document.querySelectorAll('.ticket-checkbox').forEach(cb => {
            cb.addEventListener('change', function() {
                if (this.checked) bulkSelectedIds.add(this.dataset.ticketId);
                else bulkSelectedIds.delete(this.dataset.ticketId);
                updateBulkToolbar();
            });
        });
    }

    const openCount = tickets.filter(t => t.status !== 'suljettu').length;
    document.getElementById('ticket-count').textContent = `${openCount} avointa tikettiä (${tickets.length} yht.)`;

    // Status summary
    const counts = {};
    tickets.forEach(t => { counts[t.status] = (counts[t.status] || 0) + 1; });
    const parts = [];
    if (counts.uusi) parts.push(`${counts.uusi} uutta`);
    if (counts.kasittelyssa) parts.push(`${counts.kasittelyssa} käsittelyssä`);
    if (counts.odottaa) parts.push(`${counts.odottaa} odottaa`);
    document.getElementById('ticket-status-summary').textContent = parts.join(' · ');
}

document.getElementById('ticket-search-input').addEventListener('input', () => renderTickets());
document.getElementById('ticket-status-filter').addEventListener('change', () => renderTickets());
document.getElementById('ticket-type-filter').addEventListener('change', () => renderTickets());
document.getElementById('ticket-tag-filter').addEventListener('input', () => renderTickets());
document.getElementById('ticket-sort').addEventListener('change', () => renderTickets());
document.getElementById('ticket-show-closed').addEventListener('change', () => renderTickets());
document.getElementById('bulk-select-all').addEventListener('change', function() {
    const checkboxes = document.querySelectorAll('.ticket-checkbox');
    checkboxes.forEach(cb => {
        cb.checked = this.checked;
        if (this.checked) bulkSelectedIds.add(cb.dataset.ticketId);
        else bulkSelectedIds.delete(cb.dataset.ticketId);
    });
    updateBulkToolbar();
});

document.getElementById('tickets-tbody').addEventListener('click', (e) => {
    const row = e.target.closest('tr');
    if (row && row.dataset.ticketId) showTicketDetail(row.dataset.ticketId, row.dataset.companyId || '');
});

// Helper: lisää company_id query parametri tiketti-kutsuihin
function ticketCompanyParam() {
    return currentTicketCompanyId ? '&company_id=' + encodeURIComponent(currentTicketCompanyId) : '';
}

async function showTicketDetail(id, companyId = '') {
    try {
        currentTicketCompanyId = companyId;
        const ticket = await apiCall('ticket_detail&id=' + encodeURIComponent(id) + ticketCompanyParam());
        currentTicketId = id;

        // Header
        document.getElementById('ticket-detail-header').innerHTML = `
            <div style="display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:1rem;margin-bottom:1.25rem;">
                <div>
                    <h2 style="color:#0f3460;margin-bottom:0.25rem;font-size:1.2rem;">${ticket.ticket_number ? `<span style="color:#888;font-weight:normal;font-size:0.9rem;">#${ticket.ticket_number}</span> ` : ''}${esc(ticket.subject)}</h2>
                    <div style="font-size:0.85rem;color:#888;" id="ticket-sender-line">
                        ${esc(ticket.from_name)} &lt;${esc(ticket.from_email)}&gt; · Luotu ${esc(ticket.created)}
                    </div>
                </div>
                <div style="display:flex;gap:0.5rem;align-items:center;flex-wrap:wrap;">
                    <select id="ticket-type-select" style="padding:6px 10px;border:2px solid #e0e0e0;border-radius:8px;font-size:0.85rem;">
                        <option value="muu" ${(ticket.type || 'muu') === 'muu' ? 'selected' : ''}>Muu</option>
                        <option value="laskutus" ${ticket.type === 'laskutus' ? 'selected' : ''}>Laskutus</option>
                        <option value="tekniikka" ${ticket.type === 'tekniikka' ? 'selected' : ''}>Tekniikka</option>
                        <option value="vika" ${ticket.type === 'vika' ? 'selected' : ''}>Vika</option>
                    </select>
                    <select id="ticket-status-select" style="padding:6px 10px;border:2px solid #e0e0e0;border-radius:8px;font-size:0.85rem;">
                        <option value="uusi" ${ticket.status === 'uusi' ? 'selected' : ''}>Uusi</option>
                        <option value="kasittelyssa" ${ticket.status === 'kasittelyssa' ? 'selected' : ''}>Käsittelyssä</option>
                        <option value="odottaa" ${ticket.status === 'odottaa' ? 'selected' : ''}>Odottaa vastausta</option>
                        <option value="suljettu" ${ticket.status === 'suljettu' || ticket.status === 'ratkaistu' ? 'selected' : ''}>Suljettu</option>
                    </select>
                    <select id="ticket-assign-select" style="padding:6px 10px;border:2px solid #e0e0e0;border-radius:8px;font-size:0.85rem;">
                        <option value="">Ei agenttia</option>
                    </select>
                    <select id="ticket-priority-select" style="padding:6px 10px;border:2px solid ${(ticket.priority || 'normaali') === 'urgent' ? '#e74c3c' : (ticket.priority === 'tärkeä' ? '#e67e22' : '#e0e0e0')};border-radius:8px;font-size:0.85rem;${(ticket.priority || 'normaali') === 'urgent' ? 'background:#fef2f2;color:#c0392b;font-weight:700;' : ''}">
                        <option value="normaali" ${(ticket.priority || 'normaali') === 'normaali' ? 'selected' : ''}>Normaali</option>
                        <option value="tärkeä" ${ticket.priority === 'tärkeä' ? 'selected' : ''}>⚠️ Tärkeä</option>
                        <option value="urgent" ${ticket.priority === 'urgent' ? 'selected' : ''}>🚨 URGENT</option>
                    </select>
                    <select id="ticket-customer-select" style="padding:6px 10px;border:2px solid #e0e0e0;border-radius:8px;font-size:0.85rem;">
                        <option value="">Ei asiakkuutta</option>
                    </select>
                    <button class="btn-secondary" id="btn-ticket-to-todo" style="padding:6px 12px;font-size:0.82rem;" title="Luo tehtävä tästä tiketistä">📋 Tehtävä</button>
                    <button class="btn-danger" id="btn-ticket-delete" style="padding:6px 12px;font-size:0.82rem;">Poista</button>
                </div>
            </div>
            <div style="display:flex;align-items:center;gap:0.5rem;flex-wrap:wrap;margin-top:0.5rem;">
                <span style="font-size:0.82rem;color:#888;font-weight:600;">Tagit:</span>
                <div id="ticket-tags-container" style="display:flex;gap:0.35rem;flex-wrap:wrap;align-items:center;">
                    ${(ticket.tags || []).map(tag => '<span class="ticket-tag ticket-tag-editable" data-tag="' + esc(tag) + '">#' + esc(tag) + ' <button class="ticket-tag-remove" title="Poista">&times;</button></span>').join('')}
                </div>
                <div style="display:flex;gap:0.3rem;align-items:center;">
                    <input type="text" id="ticket-tag-input" placeholder="+ Lisää tagi" style="padding:4px 8px;border:1px solid #ddd;border-radius:6px;font-size:0.82rem;width:120px;">
                </div>
                ${ticket.auto_close_at ? '<span style="font-size:0.78rem;color:#e67e22;margin-left:0.5rem;">&#9200; Auto-close: ' + esc(ticket.auto_close_at.substring(0, 10)) + '</span>' : ''}
            </div>
            ${ticket.cc ? '<div style="font-size:0.82rem;color:#888;margin-top:0.4rem;">CC: ' + esc(ticket.cc) + '</div>' : ''}`;

        // Load users for assignment dropdown
        try {
            const users = await apiCall('users');
            const assignSelect = document.getElementById('ticket-assign-select');
            users.forEach(u => {
                const opt = document.createElement('option');
                opt.value = u.username;
                opt.textContent = u.nimi || u.username;
                if (u.username === ticket.assigned_to) opt.selected = true;
                assignSelect.appendChild(opt);
            });
        } catch (e) { /* non-admin may not access users */ }

        // Type change handler
        document.getElementById('ticket-type-select').addEventListener('change', async function() {
            try {
                await apiCall('ticket_type' + ticketCompanyParam(), 'POST', { id: currentTicketId, type: this.value });
            } catch (e) { alert(e.message); }
        });

        // Status change handler
        document.getElementById('ticket-status-select').addEventListener('change', async function() {
            try {
                await apiCall('ticket_status' + ticketCompanyParam(), 'POST', { id: currentTicketId, status: this.value });
            } catch (e) { alert(e.message); }
        });

        // Assign handler
        document.getElementById('ticket-assign-select').addEventListener('change', async function() {
            try {
                await apiCall('ticket_assign' + ticketCompanyParam(), 'POST', { id: currentTicketId, assigned_to: this.value });
            } catch (e) { alert(e.message); }
        });

        // Customer link — load customers dropdown + automaattinen tunnistus
        try {
            const custSelect = document.getElementById('ticket-customer-select');
            customers.forEach(c => {
                const opt = document.createElement('option');
                opt.value = c.id;
                opt.textContent = c.yritys;
                if (c.id === ticket.customer_id) opt.selected = true;
                custSelect.appendChild(opt);
            });

            // Automaattinen asiakastunnistus sähköpostin perusteella
            const senderEmail = (ticket.from_email || '').toLowerCase().trim();
            const senderLine = document.getElementById('ticket-sender-line');
            if (senderEmail && !ticket.customer_id) {
                const matchedCustomer = customers.find(c =>
                    (c.sahkoposti || '').toLowerCase().trim() === senderEmail ||
                    (c.laskutussahkoposti || '').toLowerCase().trim() === senderEmail
                );
                if (matchedCustomer) {
                    // Löytyi asiakas → linkitä automaattisesti
                    custSelect.value = matchedCustomer.id;
                    custSelect.dispatchEvent(new Event('change'));
                    if (senderLine) {
                        senderLine.insertAdjacentHTML('beforeend',
                            ` <span style="background:#e6f9ee;color:#1a7d42;padding:2px 8px;border-radius:10px;font-size:0.78rem;font-weight:600;">✓ ${esc(matchedCustomer.yritys)}</span>`);
                    }
                } else {
                    // Ei löytynyt → näytä "Lisää liidi" -nappi
                    if (senderLine) {
                        senderLine.insertAdjacentHTML('beforeend',
                            ` <button class="btn-link" id="btn-ticket-add-lead" style="font-size:0.82rem;color:#2563eb;font-weight:600;margin-left:0.5rem;" title="Luo liidi tämän lähettäjän tiedoilla">+ Lisää liidi</button>`);
                        document.getElementById('btn-ticket-add-lead')?.addEventListener('click', () => {
                            // Avaa liidilomake esitäytetyillä tiedoilla
                            openLeadForm(null);
                            document.getElementById('lead-form-yhteyshenkilo').value = ticket.from_name || '';
                            document.getElementById('lead-form-sahkoposti').value = ticket.from_email || '';
                            document.getElementById('lead-form-muistiinpanot').value = 'Tiketti: ' + (ticket.subject || '') + '\\nLähettäjä: ' + (ticket.from_email || '');
                        });
                    }
                }
            } else if (senderEmail && ticket.customer_id) {
                // Asiakas jo linkitetty — näytä badge
                const linked = customers.find(c => c.id === ticket.customer_id);
                if (linked && senderLine) {
                    senderLine.insertAdjacentHTML('beforeend',
                        ` <span style="background:#e6f9ee;color:#1a7d42;padding:2px 8px;border-radius:10px;font-size:0.78rem;font-weight:600;">✓ ${esc(linked.yritys)}</span>`);
                }
            }
        } catch (e) {}

        document.getElementById('ticket-customer-select').addEventListener('change', async function() {
            const selOpt = this.options[this.selectedIndex];
            const custName = this.value ? selOpt.textContent : '';
            try {
                await apiCall('ticket_customer' + ticketCompanyParam(), 'POST', { id: currentTicketId, customer_id: this.value, customer_name: custName });
            } catch (e) { alert(e.message); }
        });

        // Priority handler
        document.getElementById('ticket-priority-select').addEventListener('change', async function() {
            try {
                await apiCall('ticket_priority' + ticketCompanyParam(), 'POST', { id: currentTicketId, priority: this.value });
                // Päivitä näkymä (visuaalinen muutos)
                await showTicketDetail(currentTicketId, currentTicketCompanyId);
            } catch (e) { alert(e.message); }
        });

        // Delete handler
        document.getElementById('btn-ticket-delete').addEventListener('click', async () => {
            if (!confirm('Poistetaanko tiketti "' + ticket.subject + '"?')) return;
            try {
                await apiCall('ticket_delete' + ticketCompanyParam(), 'POST', { id: currentTicketId });
                showTicketListView();
                loadTickets();
            } catch (e) { alert(e.message); }
        });

        // Luo tehtävä tiketistä
        document.getElementById('btn-ticket-to-todo')?.addEventListener('click', () => {
            createTodoFromTicket(ticket);
        });

        // Tags: add new tag on Enter
        document.getElementById('ticket-tag-input').addEventListener('keydown', async (e) => {
            if (e.key !== 'Enter') return;
            e.preventDefault();
            const input = e.target;
            const newTag = input.value.trim().toLowerCase().replace(/^#/, '');
            if (!newTag) return;
            const currentTags = (ticket.tags || []).slice();
            if (!currentTags.includes(newTag)) currentTags.push(newTag);
            input.value = '';
            try {
                await apiCall('ticket_tags' + ticketCompanyParam(), 'POST', { id: currentTicketId, tags: currentTags });
                await showTicketDetail(currentTicketId, currentTicketCompanyId);
            } catch (e2) { alert(e2.message); }
        });

        // Tags: remove tag
        document.querySelectorAll('.ticket-tag-remove').forEach(btn => {
            btn.addEventListener('click', async (e) => {
                e.stopPropagation();
                const tagEl = btn.closest('.ticket-tag-editable');
                const tagToRemove = tagEl.dataset.tag;
                const currentTags = (ticket.tags || []).filter(t => t !== tagToRemove);
                try {
                    await apiCall('ticket_tags' + ticketCompanyParam(), 'POST', { id: currentTicketId, tags: currentTags });
                    await showTicketDetail(currentTicketId, currentTicketCompanyId);
                } catch (e2) { alert(e2.message); }
            });
        });

        // Thread messages
        const thread = document.getElementById('ticket-thread');
        thread.innerHTML = (ticket.messages || []).map(m => {
            const isOut = m.type === 'reply_out';
            const isAutoReply = m.type === 'auto_reply';
            const isNote = m.type === 'note';
            const typeClass = (isOut || isAutoReply) ? 'ticket-msg-out' : (isNote ? 'ticket-msg-note' : 'ticket-msg-in');
            const typeIcon = isAutoReply ? '&#9889; Automaattinen vastaus' : (isOut ? '&#8594; Vastaus' : (isNote ? '&#128221; Muistiinpano' : '&#8592; Saapunut'));
            return `<div class="ticket-message ${typeClass}">
                <div class="ticket-msg-header">
                    <span class="ticket-msg-type">${typeIcon}</span>
                    <strong>${esc(m.from_name || m.from)}</strong>
                    <span class="ticket-msg-time">${esc(m.timestamp)}</span>
                </div>
                <div class="ticket-msg-body">${esc(m.body)}</div>
            </div>`;
        }).join('');

        // Show detail, hide list + other views
        document.getElementById('ticket-list-view').style.display = 'none';
        document.getElementById('ticket-rules-view').style.display = 'none';
        document.getElementById('ticket-templates-view').style.display = 'none';
        document.getElementById('ticket-detail-view').style.display = 'block';

        // Reset reply form
        document.getElementById('ticket-reply-body').value = '';
        document.getElementById('ticket-reply-body').placeholder = 'Kirjoita vastaus...';
        ticketReplyType = 'reply';
        document.querySelectorAll('.btn-reply-tab').forEach(b => b.classList.remove('active'));
        document.querySelector('.btn-reply-tab[data-reply-type="reply"]').classList.add('active');
        document.getElementById('btn-send-reply').textContent = 'Lähetä vastaus';

        // TO-kenttä — tiketin alkuperäinen lähettäjä
        const toField = document.getElementById('reply-to');
        if (toField) toField.value = ticket.from_email || '';

        // CC-kenttä — täytetään tiketin CC:stä
        const ccField = document.getElementById('reply-cc');
        if (ccField) ccField.value = ticket.cc || '';

        // Mailbox-valinta — täytetään yrityksen postilaatikoista
        const mbSelect = document.getElementById('reply-mailbox-select');
        if (mbSelect) {
            try {
                const mailboxes = await apiCall('all_mailboxes');
                mbSelect.innerHTML = mailboxes.map(mb =>
                    `<option value="${esc(mb.id)}" ${mb.id === (ticket.mailbox_id || '') ? 'selected' : ''}>${esc(mb.nimi || mb.smtp_from_email)} &lt;${esc(mb.smtp_from_email)}&gt;</option>`
                ).join('');
                // Vaihda allekirjoitusta kun mailbox vaihtuu
                mbSelect.addEventListener('change', function() {
                    updateSignaturePreview(this.value);
                });
            } catch (e) { mbSelect.innerHTML = '<option>Ei postilaatikoita</option>'; }
        }

        // Allekirjoituksen esikatselu
        function updateSignaturePreview(mbId) {
            const sigPreview = document.getElementById('signature-preview');
            const useSigCheck = document.getElementById('reply-use-signature');
            // Etsi allekirjoitus: ensin suoraan mailbox-id:llä, sitten fallback ensimmäiseen löytyvään
            let sig = currentUserSignatures[mbId] || '';
            if (!sig && mbId) {
                // Kokeile myös string/number-konversiota
                sig = currentUserSignatures[String(mbId)] || currentUserSignatures[Number(mbId)] || '';
            }
            if (!sig) {
                // Fallback: käytä ensimmäistä löytyvää allekirjoitusta
                const keys = Object.keys(currentUserSignatures);
                if (keys.length > 0) sig = currentUserSignatures[keys[0]] || '';
            }
            if (sig && useSigCheck && useSigCheck.checked) {
                sigPreview.textContent = '-- \n' + sig;
                sigPreview.style.display = 'block';
            } else {
                sigPreview.style.display = 'none';
            }
        }
        updateSignaturePreview(ticket.mailbox_id || '');

        // Allekirjoitus-checkbox: päivitä esikatselu vaihdettaessa
        const useSigCheckbox = document.getElementById('reply-use-signature');
        if (useSigCheckbox) {
            useSigCheckbox.addEventListener('change', () => {
                const mbSelect = document.getElementById('reply-mailbox-select');
                updateSignaturePreview(mbSelect ? mbSelect.value : '');
            });
        }

        // Vastauspohjat — lataa dropdown
        try {
            const templates = await apiCall('reply_templates');
            const tplSelect = document.getElementById('reply-template-select');
            tplSelect.innerHTML = '<option value="">📝 Vastauspohjat...</option>';
            templates.forEach(t => {
                tplSelect.innerHTML += `<option value="${esc(t.id)}" data-body="${esc(t.body)}">${esc(t.nimi)}</option>`;
            });
            tplSelect.addEventListener('change', function() {
                const opt = this.options[this.selectedIndex];
                const body = opt.dataset.body || '';
                if (body) {
                    const textarea = document.getElementById('ticket-reply-body');
                    textarea.value = textarea.value ? textarea.value + '\n\n' + body : body;
                    textarea.focus();
                }
                this.value = ''; // Reset select
            });
        } catch (e) { /* templates not critical */ }

    } catch (e) { alert(e.message); }
}

function showTicketListView() {
    document.getElementById('ticket-detail-view').style.display = 'none';
    document.getElementById('ticket-rules-view').style.display = 'none';
    document.getElementById('ticket-templates-view').style.display = 'none';
    document.getElementById('ticket-list-view').style.display = 'block';
    currentTicketId = null;
    // Reset bulk selection
    bulkSelectedIds.clear();
    const selectAll = document.getElementById('bulk-select-all');
    if (selectAll) selectAll.checked = false;
    updateBulkToolbar();
}

document.getElementById('btn-ticket-back').addEventListener('click', () => {
    showTicketListView();
    loadTickets();
});

// Reply type tabs
document.querySelectorAll('.btn-reply-tab').forEach(btn => {
    btn.addEventListener('click', () => {
        document.querySelectorAll('.btn-reply-tab').forEach(b => b.classList.remove('active'));
        btn.classList.add('active');
        ticketReplyType = btn.dataset.replyType;
        const textarea = document.getElementById('ticket-reply-body');
        const sendBtn = document.getElementById('btn-send-reply');
        const sigPrev = document.getElementById('signature-preview');
        const metaFields = document.getElementById('reply-meta-fields');
        const tplWrap = document.getElementById('reply-template-select-wrap');
        const useSigEl = document.getElementById('reply-use-signature');
        const sigLabel = useSigEl ? useSigEl.closest('label') : null;
        if (ticketReplyType === 'note') {
            textarea.placeholder = 'Kirjoita sisäinen muistiinpano...';
            sendBtn.textContent = 'Tallenna muistiinpano';
            sigPrev.style.display = 'none';
            if (metaFields) metaFields.style.display = 'none';
            if (tplWrap) tplWrap.style.display = 'none';
            if (sigLabel) sigLabel.style.display = 'none';
        } else {
            textarea.placeholder = 'Kirjoita vastaus...';
            sendBtn.textContent = 'Lähetä vastaus';
            if (metaFields) metaFields.style.display = '';
            if (tplWrap) tplWrap.style.display = '';
            if (sigLabel) sigLabel.style.display = '';
            // Näytä allekirjoitus jos checkbox päällä
            if (sigPrev.textContent.trim() && useSigEl && useSigEl.checked) sigPrev.style.display = 'block';
        }
    });
});

// Send reply or note
document.getElementById('btn-send-reply').addEventListener('click', async () => {
    const body = document.getElementById('ticket-reply-body').value.trim();
    if (!body) { alert('Kirjoita viesti ensin'); return; }
    if (!currentTicketId) return;

    const btn = document.getElementById('btn-send-reply');
    btn.disabled = true;
    btn.textContent = 'Lähetetään...';

    try {
        const action = ticketReplyType === 'note' ? 'ticket_note' : 'ticket_reply';
        const payload = { id: currentTicketId, body };
        if (ticketReplyType !== 'note') {
            const mbSel = document.getElementById('reply-mailbox-select');
            const toFld = document.getElementById('reply-to');
            const ccFld = document.getElementById('reply-cc');
            const useSig = document.getElementById('reply-use-signature');
            if (mbSel) payload.mailbox_id = mbSel.value;
            if (toFld && toFld.value.trim()) payload.to = toFld.value.trim();
            if (ccFld) payload.cc = ccFld.value.trim();
            if (useSig && !useSig.checked) payload.no_signature = true;
        }
        await apiCall(action + ticketCompanyParam(), 'POST', payload);
        // Reload the detail view
        await showTicketDetail(currentTicketId, currentTicketCompanyId);
    } catch (e) {
        alert(e.message);
    } finally {
        btn.disabled = false;
        btn.textContent = ticketReplyType === 'note' ? 'Tallenna muistiinpano' : 'Lähetä vastaus';
    }
});

// Fetch emails
document.getElementById('btn-fetch-emails').addEventListener('click', async () => {
    const btn = document.getElementById('btn-fetch-emails');
    const status = document.getElementById('ticket-fetch-status');
    btn.disabled = true;
    btn.textContent = '⏳ Haetaan...';
    status.style.display = 'block';
    status.className = '';
    status.style.background = '#f0f7ff';
    status.style.color = '#0f3460';
    status.textContent = 'Yhdistetään sähköpostipalvelimeen...';

    try {
        const result = await apiCall('ticket_fetch', 'POST');
        status.style.background = '#eafaf1';
        status.style.color = '#27ae60';
        status.textContent = `Valmis! ${result.new_tickets} uutta tikettiä, ${result.threaded} ketjutettu viestiä. Yhteensä ${result.total} tikettiä.`;
        await loadTickets();
    } catch (e) {
        status.style.background = '#fef2f2';
        status.style.color = '#e74c3c';
        status.textContent = 'Virhe: ' + e.message;
    } finally {
        btn.disabled = false;
        btn.textContent = '📧 Hae postit';
        setTimeout(() => { status.style.display = 'none'; }, 8000);
    }
});

// ==================== TICKET AUTO-REFRESH ====================

let ticketAutoRefreshTimer = null;

function startTicketAutoRefresh() {
    stopTicketAutoRefresh();
    const seconds = parseInt(document.getElementById('ticket-refresh-interval').value) || 60;
    ticketAutoRefreshTimer = setInterval(() => {
        // Vain jos support-tabi on aktiivinen ja listanäkymä näkyy
        const supportActive = document.getElementById('tab-content-support').classList.contains('active');
        const listVisible = document.getElementById('ticket-list-view').style.display !== 'none';
        if (supportActive && listVisible) {
            loadTickets();
        }
    }, seconds * 1000);
}

function stopTicketAutoRefresh() {
    if (ticketAutoRefreshTimer) {
        clearInterval(ticketAutoRefreshTimer);
        ticketAutoRefreshTimer = null;
    }
}

document.getElementById('ticket-auto-refresh').addEventListener('change', function() {
    if (this.checked) {
        startTicketAutoRefresh();
    } else {
        stopTicketAutoRefresh();
    }
});

document.getElementById('ticket-refresh-interval').addEventListener('change', function() {
    if (document.getElementById('ticket-auto-refresh').checked) {
        startTicketAutoRefresh(); // Käynnistä uudelleen uudella intervallilla
    }
});

// ==================== TICKET RULES (AUTOMAATTISÄÄNNÖT) ====================

let ticketRules = [];
let editingRuleId = null;

async function loadRules() {
    try {
        ticketRules = await apiCall('ticket_rules');
        renderRules();
    } catch (e) { console.error(e); }
}

function renderRules() {
    const list = document.getElementById('rules-list');
    if (ticketRules.length === 0) {
        list.innerHTML = '<div style="text-align:center;padding:2rem;color:#aaa;">Ei sääntöjä vielä. Lisää ensimmäinen sääntö.</div>';
        return;
    }
    list.innerHTML = ticketRules.map(r => {
        const conditions = [];
        if (r.from_contains) conditions.push('Lähettäjä: <strong>' + esc(r.from_contains) + '</strong>');
        if (r.subject_contains) conditions.push('Otsikko: <strong>' + esc(r.subject_contains) + '</strong>');
        const actions = [];
        if (r.set_status) actions.push('Tila → ' + (ticketStatusLabels[r.set_status] || r.set_status));
        if (r.set_type) actions.push('Tyyppi → ' + (ticketTypeLabels[r.set_type] || r.set_type));
        if (r.set_tags) actions.push('Tagit: #' + r.set_tags.split(',').map(t => t.trim()).join(' #'));
        if (r.auto_close_days) actions.push('Auto-close: ' + r.auto_close_days + 'pv');
        return `<div style="display:flex;justify-content:space-between;align-items:center;padding:0.75rem 1rem;background:${r.enabled ? '#f8f9fb' : '#fafafa'};border:1px solid #e8ebf0;border-radius:8px;margin-bottom:0.5rem;opacity:${r.enabled ? '1' : '0.5'};">
            <div>
                <div style="font-weight:600;color:#0f3460;font-size:0.9rem;">${esc(r.name)}</div>
                <div style="font-size:0.8rem;color:#888;margin-top:2px;">
                    ${conditions.length ? 'Ehdot: ' + conditions.join(', ') : '<em>Ei ehtoja</em>'} → ${actions.length ? actions.join(', ') : '<em>Ei toimenpiteitä</em>'}
                </div>
            </div>
            <div style="display:flex;gap:0.4rem;align-items:center;flex-shrink:0;">
                <label style="cursor:pointer;font-size:0.8rem;color:#888;display:flex;align-items:center;gap:3px;">
                    <input type="checkbox" ${r.enabled ? 'checked' : ''} onchange="toggleRule('${r.id}', this.checked)"> Päällä
                </label>
                <button onclick="editRule('${r.id}')" style="background:none;border:none;cursor:pointer;font-size:1rem;padding:4px;">&#9998;</button>
                <button onclick="deleteRule('${r.id}')" style="background:none;border:none;cursor:pointer;font-size:1rem;padding:4px;color:#e74c3c;">&#128465;</button>
            </div>
        </div>`;
    }).join('');
}

function showRulesView() {
    document.getElementById('ticket-list-view').style.display = 'none';
    document.getElementById('ticket-detail-view').style.display = 'none';
    document.getElementById('ticket-templates-view').style.display = 'none';
    document.getElementById('ticket-rules-view').style.display = 'block';
    loadRules();
}

function hideRulesView() {
    document.getElementById('ticket-rules-view').style.display = 'none';
    document.getElementById('ticket-list-view').style.display = 'block';
}

function showRuleForm(rule) {
    document.getElementById('rule-form-container').style.display = '';
    document.getElementById('rule-form-title').textContent = rule ? 'Muokkaa sääntöä' : 'Uusi sääntö';
    document.getElementById('rule-form-id').value = rule ? rule.id : '';
    document.getElementById('rule-form-name').value = rule ? rule.name : '';
    document.getElementById('rule-form-from').value = rule ? rule.from_contains : '';
    document.getElementById('rule-form-subject').value = rule ? rule.subject_contains : '';
    document.getElementById('rule-form-status').value = rule ? (rule.set_status || '') : '';
    document.getElementById('rule-form-type').value = rule ? (rule.set_type || '') : '';
    document.getElementById('rule-form-tags').value = rule ? (rule.set_tags || '') : '';
    document.getElementById('rule-form-autoclose').value = rule ? (rule.auto_close_days || '') : '';
    editingRuleId = rule ? rule.id : null;
}

function hideRuleForm() {
    document.getElementById('rule-form-container').style.display = 'none';
    editingRuleId = null;
}

document.getElementById('btn-ticket-rules').addEventListener('click', () => showRulesView());
document.getElementById('btn-rules-back').addEventListener('click', () => hideRulesView());
document.getElementById('btn-add-rule').addEventListener('click', () => showRuleForm(null));
document.getElementById('btn-cancel-rule').addEventListener('click', () => hideRuleForm());

document.getElementById('btn-save-rule').addEventListener('click', async () => {
    const name = document.getElementById('rule-form-name').value.trim();
    if (!name) { alert('Nimi puuttuu'); return; }
    const data = {
        name,
        from_contains: document.getElementById('rule-form-from').value.trim(),
        subject_contains: document.getElementById('rule-form-subject').value.trim(),
        set_status: document.getElementById('rule-form-status').value,
        set_type: document.getElementById('rule-form-type').value,
        set_tags: document.getElementById('rule-form-tags').value.trim(),
        auto_close_days: parseInt(document.getElementById('rule-form-autoclose').value) || 0,
        enabled: true,
    };
    const existingId = document.getElementById('rule-form-id').value;
    if (existingId) data.id = existingId;
    try {
        await apiCall('ticket_rule_save', 'POST', data);
        hideRuleForm();
        await loadRules();
    } catch (e) { alert(e.message); }
});

async function editRule(id) {
    const rule = ticketRules.find(r => r.id === id);
    if (rule) showRuleForm(rule);
}

async function deleteRule(id) {
    if (!confirm('Poistetaanko sääntö?')) return;
    try {
        await apiCall('ticket_rule_delete', 'POST', { id });
        await loadRules();
    } catch (e) { alert(e.message); }
}

async function toggleRule(id, enabled) {
    const rule = ticketRules.find(r => r.id === id);
    if (!rule) return;
    try {
        await apiCall('ticket_rule_save', 'POST', { ...rule, enabled });
        await loadRules();
    } catch (e) { alert(e.message); }
}

// ==================== VASTAUSPOHJAT (TUKITABISSA) ====================

function showTemplatesView() {
    document.getElementById('ticket-list-view').style.display = 'none';
    document.getElementById('ticket-detail-view').style.display = 'none';
    document.getElementById('ticket-rules-view').style.display = 'none';
    document.getElementById('ticket-templates-view').style.display = 'block';
    hideTplForm();
    renderTplList();
}

function hideTemplatesView() {
    document.getElementById('ticket-templates-view').style.display = 'none';
    document.getElementById('ticket-list-view').style.display = 'block';
}

function renderTplList() {
    const list = document.getElementById('tpl-list');
    if (!list) return;
    if (replyTemplates.length === 0) {
        list.innerHTML = '<p style="color:#aaa;font-size:0.85rem;">Ei vastauspohjia vielä. Lisää ensimmäinen klikkaamalla "+ Lisää pohja".</p>';
        return;
    }
    list.innerHTML = replyTemplates.map(t =>
        `<div style="display:flex;justify-content:space-between;align-items:center;padding:0.6rem 0;border-bottom:1px solid #f0f2f5;">
            <div style="min-width:0;flex:1;">
                <strong style="font-size:0.9rem;">${esc(t.nimi)}</strong>
                <div style="font-size:0.8rem;color:#888;max-width:450px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;">${esc(t.body.substring(0, 100))}</div>
            </div>
            <div style="display:flex;gap:0.3rem;flex-shrink:0;">
                <button class="btn-secondary" onclick="editTpl('${t.id}')" style="padding:4px 10px;font-size:0.8rem;">Muokkaa</button>
                <button class="btn-danger" onclick="deleteTpl('${t.id}')" style="padding:4px 10px;font-size:0.8rem;">Poista</button>
            </div>
        </div>`
    ).join('');
}

function showTplForm(tpl) {
    document.getElementById('tpl-form-container').style.display = '';
    document.getElementById('tpl-form-title').textContent = tpl ? 'Muokkaa vastauspohjaa' : 'Uusi vastauspohja';
    document.getElementById('tpl-form-id').value = tpl ? tpl.id : '';
    document.getElementById('tpl-form-name').value = tpl ? tpl.nimi : '';
    document.getElementById('tpl-form-body').value = tpl ? tpl.body : '';
}

function hideTplForm() {
    document.getElementById('tpl-form-container').style.display = 'none';
}

document.getElementById('btn-ticket-templates').addEventListener('click', async () => {
    await loadTemplates();
    showTemplatesView();
});
document.getElementById('btn-templates-back').addEventListener('click', () => hideTemplatesView());
document.getElementById('btn-add-tpl').addEventListener('click', () => showTplForm(null));
document.getElementById('btn-cancel-tpl').addEventListener('click', () => hideTplForm());

document.getElementById('btn-save-tpl').addEventListener('click', async () => {
    const nimi = document.getElementById('tpl-form-name').value.trim();
    const body = document.getElementById('tpl-form-body').value.trim();
    if (!nimi || !body) { alert('Täytä nimi ja sisältö'); return; }
    const id = document.getElementById('tpl-form-id').value || undefined;
    try {
        await apiCall('reply_template_save', 'POST', { id, nimi, body });
        hideTplForm();
        await loadTemplates();
        renderTplList();
    } catch (e) { alert(e.message); }
});

window.editTpl = function(id) {
    const t = replyTemplates.find(x => x.id === id);
    if (t) showTplForm(t);
};

window.deleteTpl = async function(id) {
    if (!confirm('Poistetaanko vastauspohja?')) return;
    try {
        await apiCall('reply_template_delete', 'POST', { id });
        await loadTemplates();
        renderTplList();
    } catch (e) { alert(e.message); }
};

// ==================== BULK ACTIONS ====================

let bulkSelectedIds = new Set();

function updateBulkToolbar() {
    const toolbar = document.getElementById('bulk-actions-toolbar');
    if (bulkSelectedIds.size > 0) {
        toolbar.style.display = 'flex';
        document.getElementById('bulk-count').textContent = bulkSelectedIds.size + ' valittu';
    } else {
        toolbar.style.display = 'none';
    }
}

async function bulkCloseSelected() {
    if (bulkSelectedIds.size === 0) return;
    if (!confirm(`Suljetaanko ${bulkSelectedIds.size} tikettiä?`)) return;
    try {
        await apiCall('ticket_bulk_status', 'POST', { ids: [...bulkSelectedIds], status: 'suljettu' });
        bulkSelectedIds.clear();
        updateBulkToolbar();
        await loadTickets();
    } catch (e) { alert(e.message); }
}

async function bulkDeleteSelected() {
    if (bulkSelectedIds.size === 0) return;
    if (!confirm(`Poistetaanko ${bulkSelectedIds.size} tikettiä pysyvästi?`)) return;
    try {
        await apiCall('ticket_bulk_delete', 'POST', { ids: [...bulkSelectedIds] });
        bulkSelectedIds.clear();
        updateBulkToolbar();
        await loadTickets();
    } catch (e) { alert(e.message); }
}

// ==================== SETTINGS ====================

async function loadSettings() {
    try {
        const config = await apiCall('config');
        document.getElementById('settings-api-key').value = config.api_key || '';
        document.getElementById('settings-cors').value = (config.cors_origins || []).join('\n');
        // Näytä yrityksen nimi API-otsikossa
        const apiTitle = document.getElementById('api-company-name');
        if (apiTitle && currentCompany) apiTitle.textContent = currentCompany.nimi + ' — ';
        const key = config.api_key || 'AVAIN';
        document.getElementById('api-example-url').textContent = `api.php?action=saatavuus&key=${key}&osoite=Esimerkkikatu+1&postinumero=00100&kaupunki=Helsinki`;

        // Telegram-asetukset
        document.getElementById('settings-telegram-token').value = config.telegram_bot_token || '';
        document.getElementById('settings-telegram-chat').value = config.telegram_chat_id || '';
    } catch (e) { console.error(e); }

    // Vastauspohjat
    loadTemplates();
}

// ==================== VASTAUSPOHJAT ====================

let replyTemplates = [];

async function loadTemplates() {
    try {
        replyTemplates = await apiCall('reply_templates');
        renderTplList();
    } catch (e) { console.error(e); }
}


// ==================== TELEGRAM ====================

document.getElementById('btn-save-telegram').addEventListener('click', async () => {
    try {
        await apiCall('config_update', 'POST', {
            telegram_bot_token: document.getElementById('settings-telegram-token').value.trim(),
            telegram_chat_id: document.getElementById('settings-telegram-chat').value.trim(),
        });
        alert('Telegram-asetukset tallennettu!');
    } catch (e) { alert(e.message); }
});

document.getElementById('btn-test-telegram').addEventListener('click', async () => {
    try {
        await apiCall('telegram_test', 'POST');
        alert('Testiviesti lähetetty!');
    } catch (e) { alert(e.message); }
});

document.getElementById('btn-generate-key').addEventListener('click', async () => {
    try {
        const config = await apiCall('generate_api_key', 'POST');
        document.getElementById('settings-api-key').value = config.api_key || '';
        document.getElementById('api-example-url').textContent = `api.php?action=saatavuus&key=${config.api_key}&osoite=Esimerkkikatu+1&postinumero=00100&kaupunki=Helsinki`;
    } catch (e) { alert(e.message); }
});

document.getElementById('btn-save-settings').addEventListener('click', async () => {
    try {
        const config = await apiCall('config_update', 'POST', {
            api_key: document.getElementById('settings-api-key').value,
            cors_origins: document.getElementById('settings-cors').value,
        });
        alert('Asetukset tallennettu!');
    } catch (e) { alert(e.message); }
});

document.getElementById('btn-test-api').addEventListener('click', async () => {
    const osoite = document.getElementById('test-api-address').value.trim();
    const postinumero = document.getElementById('test-api-zip').value.trim();
    const kaupunki = document.getElementById('test-api-city').value.trim();
    const apiKey = document.getElementById('settings-api-key').value;
    if (!osoite || !postinumero || !kaupunki) { alert('Täytä osoite, postinumero ja kaupunki'); return; }
    const result = document.getElementById('test-api-result');
    result.style.display = 'block';
    result.textContent = 'Haetaan...';
    try {
        const params = `osoite=${encodeURIComponent(osoite)}&postinumero=${encodeURIComponent(postinumero)}&kaupunki=${encodeURIComponent(kaupunki)}`;
        const res = await fetch(`${API}?action=saatavuus&key=${encodeURIComponent(apiKey)}&${params}`);
        const data = await res.json();
        result.textContent = JSON.stringify(data, null, 2);
    } catch (e) { result.textContent = 'Virhe: ' + e.message; }
});

// ==================== MODALS ====================

customerModal.addEventListener('click', (e) => { if (e.target === customerModal) customerModal.style.display = 'none'; });
detailModal.addEventListener('click', (e) => { if (e.target === detailModal) detailModal.style.display = 'none'; });
userModal.addEventListener('click', (e) => { if (e.target === userModal) userModal.style.display = 'none'; });
leadModal.addEventListener('click', (e) => { if (e.target === leadModal) leadModal.style.display = 'none'; });
leadDetailModal.addEventListener('click', (e) => { if (e.target === leadDetailModal) leadDetailModal.style.display = 'none'; });
document.addEventListener('keydown', (e) => {
    if (e.key === 'Escape') {
        customerModal.style.display = 'none';
        detailModal.style.display = 'none';
        userModal.style.display = 'none';
        leadModal.style.display = 'none';
        leadDetailModal.style.display = 'none';
    }
});

// ==================== COMPANY SELECTOR ====================

document.getElementById('company-selector').addEventListener('change', function () {
    switchCompany(this.value);
});

// ==================== YRITYKSET-TAB (admin) ====================

let companiesTabData = [];
let currentCompanyDetail = null;

async function loadCompaniesTab() {
    try {
        companiesTabData = await apiCall('companies_all');
        renderCompaniesTable();
    } catch (e) {
        console.error(e);
        // Fallback: käytä availableCompanies
        companiesTabData = availableCompanies;
        renderCompaniesTable();
    }
}

function renderCompaniesTable() {
    const tbody = document.getElementById('companies-tbody');
    const superAdmin = currentUser?.role === 'superadmin';
    tbody.innerHTML = companiesTabData.map(c => `<tr>
        <td><code>${esc(c.id)}</code></td>
        <td><strong>${esc(c.nimi)}</strong></td>
        <td>-</td>
        <td class="nowrap">${esc((c.luotu || '').substring(0, 10))}</td>
        <td>${c.aktiivinen !== false ? '<span style="color:#22c55e;">Aktiivinen</span>' : '<span style="color:#888;">Ei aktiivinen</span>'}</td>
        <td>
            <button class="btn-link" onclick="showCompanyDetail('${c.id}')">Asetukset</button>
            ${superAdmin ? `<button class="btn-link" style="color:#dc2626;" onclick="deleteCompany('${c.id}','${esc(c.nimi)}')">Poista</button>` : ''}
        </td>
    </tr>`).join('');
    // Piilota "Lisää yritys" nappi jos ei superadmin
    const addBtn = document.getElementById('btn-add-company');
    if (addBtn) addBtn.style.display = superAdmin ? '' : 'none';
    document.getElementById('companies-list-view').style.display = '';
    document.getElementById('company-detail-view').style.display = 'none';
}

document.getElementById('btn-add-company').addEventListener('click', () => {
    const nimi = prompt('Yrityksen nimi:');
    if (!nimi) return;
    const id = prompt('Yrityksen ID (pienillä kirjaimilla, a-z, 0-9, viiva sallittu):');
    if (!id) return;
    apiCall('company_create', 'POST', { id, nimi }).then(() => {
        loadCompaniesTab();
        // Päivitä myös company-selector
        apiCall('check_auth').then(data => {
            if (data.authenticated) {
                availableCompanies = data.companies || [];
                currentCompany = availableCompanies.find(c => c.id === data.company_id) || currentCompany;
                populateCompanySelector();
            }
        });
    }).catch(e => alert(e.message));
});

async function deleteCompany(id, nimi) {
    if (!confirm(`Poistetaanko yritys "${nimi}"? Tämä poistaa pääsyn yrityksen dataan.`)) return;
    try {
        await apiCall('company_delete', 'POST', { id });
        loadCompaniesTab();
        // Päivitä selector
        availableCompanies = availableCompanies.filter(c => c.id !== id);
        if (currentCompany && currentCompany.id === id) {
            currentCompany = availableCompanies[0] || null;
            if (currentCompany) switchCompany(currentCompany.id);
        }
        populateCompanySelector();
    } catch (e) { alert(e.message); }
}

async function showCompanyDetail(id) {
    currentCompanyDetail = id;
    document.getElementById('companies-list-view').style.display = 'none';
    document.getElementById('company-detail-view').style.display = '';
    const comp = companiesTabData.find(c => c.id === id);
    document.getElementById('company-detail-title').textContent = (comp ? comp.nimi : id) + ' — Asetukset';
    document.getElementById('company-edit-nimi').value = comp ? comp.nimi : '';
    // Brändäyskentät
    document.getElementById('company-edit-subtitle').value = comp?.subtitle || '';
    const color = comp?.primary_color || '#0f3460';
    document.getElementById('company-edit-color').value = color;
    document.getElementById('company-edit-color-text').value = color;
    document.getElementById('company-edit-domains').value = (comp?.domains || []).join('\n');
    // Logo-esikatselu
    const logoPreview = document.getElementById('company-logo-preview');
    if (comp?.logo_file) {
        logoPreview.src = 'api.php?action=company_logo&company_id=' + encodeURIComponent(id) + '&t=' + Date.now();
        logoPreview.style.display = '';
    } else {
        logoPreview.style.display = 'none';
    }

    // Moduuli-checkboxit (yhteensopivuus: vanha 'devices' → 'tekniikka')
    let enabledMods = comp?.enabled_modules || [];
    if (enabledMods.includes('devices') && !enabledMods.includes('tekniikka')) {
        enabledMods = enabledMods.map(m => m === 'devices' ? 'tekniikka' : m);
    }
    document.querySelectorAll('#modules-checkboxes input[data-module]').forEach(cb => {
        const mod = cb.dataset.module;
        // Jos enabled_modules on tyhjä → kaikki päällä (oletus)
        cb.checked = enabledMods.length === 0 ? DEFAULT_MODULES.includes(mod) : enabledMods.includes(mod);
    });

    // Sallitut IP-osoitteet
    document.getElementById('company-edit-allowed-ips').value = comp?.allowed_ips || 'kaikki';

    // Vaihda aktiivinen yritys jotta API-kutsut kohdistuvat oikein
    await apiCall('company_switch', 'POST', { company_id: id });

    // Lataa postilaatikot
    loadMailboxes();
    // Lataa sijainnit
    loadSites();
    // Lataa käyttäjäoikeudet
    loadCompanyUsers(id);
}

document.getElementById('btn-company-back').addEventListener('click', () => {
    // Vaihda takaisin alkuperäiseen yritykseen
    if (currentCompany) apiCall('company_switch', 'POST', { company_id: currentCompany.id });
    renderCompaniesTable();
});

// Synkronoi color picker <-> text input
document.getElementById('company-edit-color').addEventListener('input', function() {
    document.getElementById('company-edit-color-text').value = this.value;
});
document.getElementById('company-edit-color-text').addEventListener('input', function() {
    if (/^#[0-9a-fA-F]{6}$/.test(this.value)) {
        document.getElementById('company-edit-color').value = this.value;
    }
});

// Poimi hallitseva väri kuvasta (canvas)
function extractDominantColor(file) {
    return new Promise((resolve) => {
        const img = new Image();
        const url = URL.createObjectURL(file);
        img.onload = () => {
            const canvas = document.createElement('canvas');
            const size = 50; // Pieni koko nopeuttaa
            canvas.width = size;
            canvas.height = size;
            const ctx = canvas.getContext('2d');
            ctx.drawImage(img, 0, 0, size, size);
            const pixels = ctx.getImageData(0, 0, size, size).data;
            URL.revokeObjectURL(url);

            // Laske värien esiintymät (ryhmiteltynä 32-askeleen tarkkuudella)
            const colorCounts = {};
            for (let i = 0; i < pixels.length; i += 4) {
                const r = pixels[i], g = pixels[i+1], b = pixels[i+2], a = pixels[i+3];
                if (a < 128) continue; // Ohita läpinäkyvät
                // Ohita lähes valkoiset, mustat ja harmaat
                const max = Math.max(r, g, b), min = Math.min(r, g, b);
                const saturation = max === 0 ? 0 : (max - min) / max;
                if (max > 230 && min > 200) continue; // Valkoinen
                if (max < 30) continue; // Musta
                if (saturation < 0.15 && max > 60) continue; // Harmaa
                // Ryhmittele
                const qr = Math.round(r / 32) * 32;
                const qg = Math.round(g / 32) * 32;
                const qb = Math.round(b / 32) * 32;
                const key = `${qr},${qg},${qb}`;
                colorCounts[key] = (colorCounts[key] || 0) + 1;
            }

            // Etsi yleisin
            let bestKey = null, bestCount = 0;
            for (const [key, count] of Object.entries(colorCounts)) {
                if (count > bestCount) { bestCount = count; bestKey = key; }
            }

            if (bestKey) {
                const [r, g, b] = bestKey.split(',').map(Number);
                const hex = '#' + [r, g, b].map(v => Math.min(255, v).toString(16).padStart(2, '0')).join('');
                resolve(hex);
            } else {
                resolve(null); // Ei löytynyt selkeää väriä
            }
        };
        img.onerror = () => { URL.revokeObjectURL(url); resolve(null); };
        img.src = url;
    });
}

// Logo-upload — poimi väri automaattisesti
document.getElementById('company-logo-upload').addEventListener('change', async function() {
    if (!this.files[0] || !currentCompanyDetail) return;
    const file = this.files[0];

    // Poimi väri logosta ennen uploadia
    const dominantColor = await extractDominantColor(file);

    const formData = new FormData();
    formData.append('logo', file);
    formData.append('company_id', currentCompanyDetail);
    try {
        const res = await fetch('api.php?action=company_logo_upload', { method: 'POST', body: formData, credentials: 'include' });
        const data = await res.json();
        if (!res.ok) throw new Error(data.error || 'Virhe');
        // Päivitä preview
        const preview = document.getElementById('company-logo-preview');
        preview.src = data.logo_url + '&t=' + Date.now();
        preview.style.display = '';
        // Päivitä paikallinen data
        const comp = companiesTabData.find(c => c.id === currentCompanyDetail);
        if (comp) comp.logo_file = data.logo_file;

        // Aseta logosta poimittu väri teemaväriksi
        if (dominantColor) {
            const colorInput = document.getElementById('company-edit-color');
            if (colorInput) {
                colorInput.value = dominantColor;
                // Näytä ilmoitus
                const msg = document.createElement('span');
                msg.textContent = ` Väri ${dominantColor} poimittu logosta`;
                msg.style.cssText = 'color:#27ae60;font-size:0.85rem;margin-left:8px;';
                colorInput.parentElement.appendChild(msg);
                setTimeout(() => msg.remove(), 4000);
            }
        }
    } catch (e) { alert(e.message); }
    this.value = ''; // Reset file input
});

document.getElementById('btn-save-company-settings').addEventListener('click', async () => {
    const nimi = document.getElementById('company-edit-nimi').value.trim();
    if (!nimi) return;
    const subtitle = document.getElementById('company-edit-subtitle').value.trim();
    const primary_color = document.getElementById('company-edit-color').value;
    const domainsText = document.getElementById('company-edit-domains').value;
    const domains = domainsText.split('\n').map(d => d.trim()).filter(d => d);
    // Moduulit
    const enabled_modules = [];
    document.querySelectorAll('#modules-checkboxes input[data-module]:checked').forEach(cb => {
        enabled_modules.push(cb.dataset.module);
    });
    const allowed_ips = document.getElementById('company-edit-allowed-ips').value.trim();
    try {
        await apiCall('company_update', 'POST', { id: currentCompanyDetail, nimi, subtitle, primary_color, domains, enabled_modules, allowed_ips });
        alert('Asetukset tallennettu!');
        // Päivitä paikalliset tiedot
        const comp = companiesTabData.find(c => c.id === currentCompanyDetail);
        if (comp) { comp.nimi = nimi; comp.subtitle = subtitle; comp.primary_color = primary_color; comp.domains = domains; comp.enabled_modules = enabled_modules; comp.allowed_ips = allowed_ips; }
        const avail = availableCompanies.find(c => c.id === currentCompanyDetail);
        if (avail) avail.nimi = nimi;
        populateCompanySelector();
        // Jos tämä on aktiivinen yritys → päivitä brändäys ja moduulit heti
        if (currentCompany && currentCompany.id === currentCompanyDetail) {
            applyBranding({
                nimi, subtitle, primary_color,
                logo_url: comp?.logo_file ? 'api.php?action=company_logo&company_id=' + encodeURIComponent(currentCompanyDetail) + '&t=' + Date.now() : ''
            });
            applyModules(enabled_modules);
        }
    } catch (e) { alert(e.message); }
});

// ==================== POSTILAATIKOT ====================

let mailboxesData = [];

async function loadMailboxes() {
    try {
        mailboxesData = await apiCall('mailboxes');
        renderMailboxes();
    } catch (e) { console.error(e); }
}

function renderMailboxes() {
    const container = document.getElementById('mailboxes-list');
    if (mailboxesData.length === 0) {
        container.innerHTML = '<p style="color:#888;font-size:0.9rem;">Ei postilaatikoita. Lisää ensimmäinen postilaatikko.</p>';
        return;
    }
    container.innerHTML = mailboxesData.map(mb => `<div class="mailbox-item" style="display:flex;justify-content:space-between;align-items:center;padding:0.75rem;background:#fff;border:1px solid #e0e0e0;border-radius:8px;margin-bottom:0.5rem;">
        <div>
            <strong>${esc(mb.nimi)}</strong>
            <span style="color:#888;font-size:0.85rem;margin-left:0.75rem;">${esc(mb.imap_user)}</span>
            <span style="color:${mb.aktiivinen !== false ? '#22c55e' : '#888'};font-size:0.8rem;margin-left:0.5rem;">${mb.aktiivinen !== false ? 'Aktiivinen' : 'Ei aktiivinen'}</span>
        </div>
        <div style="display:flex;gap:0.5rem;">
            <button class="btn-link" onclick="editMailbox('${mb.id}')">Muokkaa</button>
            <button class="btn-link" style="color:#dc2626;" onclick="deleteMailbox('${mb.id}','${esc(mb.nimi)}')">Poista</button>
        </div>
    </div>`).join('');
}

document.getElementById('btn-add-mailbox').addEventListener('click', () => {
    showMailboxForm();
});

function showMailboxForm(mb = null) {
    document.getElementById('mailbox-form-title').textContent = mb ? 'Muokkaa postilaatikkoa' : 'Uusi postilaatikko';
    document.getElementById('mailbox-form-id').value = mb ? mb.id : '';
    document.getElementById('mailbox-form-nimi').value = mb ? mb.nimi : '';
    document.getElementById('mailbox-form-host').value = mb ? mb.imap_host : '';
    document.getElementById('mailbox-form-port').value = mb ? mb.imap_port : 993;
    document.getElementById('mailbox-form-user').value = mb ? mb.imap_user : '';
    document.getElementById('mailbox-form-password').value = mb ? mb.imap_password : '';
    document.getElementById('mailbox-form-encryption').value = mb ? (mb.imap_encryption || 'ssl') : 'ssl';
    document.getElementById('mailbox-form-smtp-email').value = mb ? (mb.smtp_from_email || '') : '';
    document.getElementById('mailbox-form-smtp-name').value = mb ? (mb.smtp_from_name || '') : '';
    document.getElementById('mailbox-form-smtp-host').value = mb ? (mb.smtp_host || '') : '';
    document.getElementById('mailbox-form-smtp-port').value = mb ? (mb.smtp_port || 587) : 587;
    document.getElementById('mailbox-form-smtp-user').value = mb ? (mb.smtp_user || '') : '';
    document.getElementById('mailbox-form-smtp-pass').value = mb ? (mb.smtp_password || '') : '';
    document.getElementById('mailbox-form-smtp-encryption').value = mb ? (mb.smtp_encryption || 'tls') : 'tls';
    // "Käytä samoja tunnuksia" — oletuksena päällä uudelle, olemassa olevalle tarkistetaan
    const sameCheck = document.getElementById('mailbox-form-smtp-same');
    if (mb) {
        // Jos SMTP-host on tyhjä tai sama kuin IMAP -> samoja tunnuksia
        const smtpIsSame = !mb.smtp_host || mb.smtp_host === mb.imap_host;
        sameCheck.checked = smtpIsSame;
    } else {
        sameCheck.checked = true;
    }
    // Autoreply
    const arCheck = document.getElementById('mailbox-form-auto-reply');
    arCheck.checked = mb ? !!mb.auto_reply_enabled : false;
    document.getElementById('mailbox-form-auto-reply-body').value = mb ? (mb.auto_reply_body || '') : '';
    toggleAutoReplyFields();
    toggleSmtpFields();
    document.getElementById('smtp-test-result').style.display = 'none';
    document.getElementById('mailbox-form-container').style.display = '';
}

function toggleSmtpFields() {
    const same = document.getElementById('mailbox-form-smtp-same').checked;
    document.getElementById('smtp-custom-fields').style.display = same ? 'none' : '';
}

function toggleAutoReplyFields() {
    const enabled = document.getElementById('mailbox-form-auto-reply').checked;
    document.getElementById('auto-reply-fields').style.display = enabled ? '' : 'none';
}
document.getElementById('mailbox-form-auto-reply').addEventListener('change', toggleAutoReplyFields);

function editMailbox(id) {
    const mb = mailboxesData.find(m => m.id === id);
    if (mb) showMailboxForm(mb);
}

async function deleteMailbox(id, nimi) {
    if (!confirm(`Poistetaanko postilaatikko "${nimi}"?`)) return;
    try {
        await apiCall('mailbox_delete', 'POST', { id });
        loadMailboxes();
    } catch (e) { alert(e.message); }
}

// SMTP "Käytä samoja tunnuksia" -checkbox toggle
document.getElementById('mailbox-form-smtp-same').addEventListener('change', toggleSmtpFields);

document.getElementById('btn-save-mailbox').addEventListener('click', async () => {
    const useSame = document.getElementById('mailbox-form-smtp-same').checked;
    const imapHost = document.getElementById('mailbox-form-host').value;
    const imapUser = document.getElementById('mailbox-form-user').value;
    const imapPass = document.getElementById('mailbox-form-password').value;
    const imapEnc = document.getElementById('mailbox-form-encryption').value;
    const data = {
        id: document.getElementById('mailbox-form-id').value || undefined,
        nimi: document.getElementById('mailbox-form-nimi').value,
        imap_host: imapHost,
        imap_port: parseInt(document.getElementById('mailbox-form-port').value) || 993,
        imap_user: imapUser,
        imap_password: imapPass,
        imap_encryption: imapEnc,
        smtp_from_email: document.getElementById('mailbox-form-smtp-email').value,
        smtp_from_name: document.getElementById('mailbox-form-smtp-name').value,
        smtp_host: document.getElementById('mailbox-form-smtp-host').value || (useSame ? imapHost : ''),
        smtp_port: parseInt(document.getElementById('mailbox-form-smtp-port').value) || 587,
        smtp_user: useSame ? imapUser : document.getElementById('mailbox-form-smtp-user').value,
        smtp_password: useSame ? imapPass : document.getElementById('mailbox-form-smtp-pass').value,
        smtp_encryption: document.getElementById('mailbox-form-smtp-encryption').value,
        aktiivinen: true,
        auto_reply_enabled: document.getElementById('mailbox-form-auto-reply').checked,
        auto_reply_body: document.getElementById('mailbox-form-auto-reply-body').value,
    };
    try {
        const saved = await apiCall('mailbox_save', 'POST', data);
        // Päivitä lomakkeen ID (uusi laatikko saa ID:n backendiltä)
        if (saved.id) document.getElementById('mailbox-form-id').value = saved.id;
        // Päivitä lista taustalle mutta pidä lomake auki
        loadMailboxes();
        // Näytä lyhyt "Tallennettu" -ilmoitus
        const btn = document.getElementById('btn-save-mailbox');
        const orig = btn.textContent;
        btn.textContent = '✓ Tallennettu';
        btn.style.background = '#4caf50';
        setTimeout(() => { btn.textContent = orig; btn.style.background = ''; }, 2000);
    } catch (e) { alert(e.message); }
});

document.getElementById('btn-cancel-mailbox').addEventListener('click', () => {
    document.getElementById('mailbox-form-container').style.display = 'none';
});

// SMTP-testaus
document.getElementById('btn-test-smtp').addEventListener('click', async () => {
    const mailboxId = document.getElementById('mailbox-form-id').value;
    const resultEl = document.getElementById('smtp-test-result');
    if (!mailboxId) {
        resultEl.style.display = '';
        resultEl.textContent = '⚠️ Tallenna postilaatikko ensin, sitten testaa.';
        return;
    }
    resultEl.style.display = '';
    resultEl.textContent = '⏳ Testataan SMTP-yhteyttä...';
    try {
        const res = await apiCall('smtp_test', 'POST', { mailbox_id: mailboxId });
        let output = '=== TIETOKANNAN ARVOT ===\n';
        if (res.db_values) {
            for (const [k, v] of Object.entries(res.db_values)) {
                output += `  ${k}: ${v === '' ? '(tyhjä)' : v}\n`;
            }
        }
        output += `\n=== KÄYTETTÄVÄT ARVOT ===\n`;
        output += `  Käyttäjä: ${res.effective_user || '(tyhjä)'}\n`;
        output += `  Salasana: ${res.effective_pass_hint || '?'} (${res.effective_pass_len} merkkiä)\n\n`;
        output += `=== TESTIN VAIHEET ===\n`;
        if (res.steps) {
            res.steps.forEach(s => { output += `  ${s}\n`; });
        }
        resultEl.textContent = output;
    } catch (e) {
        resultEl.textContent = '❌ Virhe: ' + e.message;
    }
});

// ==================== YRITYKSEN KÄYTTÄJÄOIKEUDET ====================

async function loadCompanyUsers(companyId) {
    try {
        const users = await apiCall('users');
        const container = document.getElementById('company-users-list');
        container.innerHTML = users.map(u => {
            const hasAccess = (u.companies || []).includes(companyId);
            return `<label style="display:flex;align-items:center;gap:0.5rem;padding:0.4rem 0;cursor:pointer;">
                <input type="checkbox" class="company-user-cb" data-user-id="${u.id}" ${hasAccess ? 'checked' : ''} onchange="toggleCompanyUser('${u.id}','${companyId}',this.checked)">
                <strong>${esc(u.nimi || u.username)}</strong>
                <span style="color:#888;font-size:0.85rem;">(${u.username}) — ${u.role === 'superadmin' ? 'Pääkäyttäjä' : (u.role === 'admin' ? 'Yritysadmin' : 'Käyttäjä')}</span>
            </label>`;
        }).join('');
    } catch (e) { console.error(e); }
}

async function toggleCompanyUser(userId, companyId, add) {
    try {
        const users = await apiCall('users');
        const user = users.find(u => u.id === userId);
        if (!user) return;
        let companies = user.companies || [];
        if (add && !companies.includes(companyId)) {
            companies.push(companyId);
        } else if (!add) {
            companies = companies.filter(c => c !== companyId);
        }
        await apiCall('user_update', 'POST', { id: userId, companies });
    } catch (e) { alert(e.message); }
}

// ==================== LAITTEET (DEVICES) ====================

let devicesData = [];
let sitesData = [];

async function loadDevices() {
    try {
        devicesData = await apiCall('devices');
        renderDevices();
    } catch (e) { console.error(e); }
}

function renderDevices() {
    const query = (document.getElementById('device-search-input')?.value || '').toLowerCase().trim();
    let filtered = devicesData;
    if (query) {
        filtered = devicesData.filter(d =>
            (d.nimi || '').toLowerCase().includes(query) ||
            (d.hallintaosoite || '').toLowerCase().includes(query) ||
            (d.serial || '').toLowerCase().includes(query) ||
            (d.site_name || '').toLowerCase().includes(query) ||
            (d.funktio || '').toLowerCase().includes(query) ||
            (d.tyyppi || '').toLowerCase().includes(query) ||
            (d.malli || '').toLowerCase().includes(query)
        );
    }
    const tbody = document.getElementById('device-tbody');
    const noDevices = document.getElementById('no-devices');
    if (filtered.length === 0) {
        tbody.innerHTML = '';
        noDevices.style.display = 'block';
    } else {
        noDevices.style.display = 'none';
        tbody.innerHTML = filtered.map(d => {
            const pingIcon = d.ping_check ? (d.ping_status === 'up' ? '🟢' : (d.ping_status === 'down' ? '🔴' : '⚪')) : '<span style="color:#ccc;">—</span>';
            return `<tr>
                <td><strong>${esc(d.nimi)}</strong></td>
                <td><code style="font-size:0.82rem;">${esc(d.hallintaosoite || '-')}</code></td>
                <td style="font-size:0.85rem;">${esc(d.serial || '-')}</td>
                <td>${d.site_name ? esc(d.site_name) : '<span style="color:#ccc;">-</span>'}</td>
                <td>${esc(d.tyyppi || '-')}</td>
                <td>${esc(d.funktio || '-')}</td>
                <td>${esc(d.malli || '-')}</td>
                <td style="text-align:center;">${pingIcon}</td>
                <td class="actions-cell">
                    <button class="btn-link" onclick="editDevice('${d.id}')">✎</button>
                    <button class="btn-link" style="color:#dc2626;" onclick="deleteDevice('${d.id}','${esc(d.nimi)}')">🗑</button>
                </td>
            </tr>`;
        }).join('');
    }
    document.getElementById('device-count').textContent = filtered.length + ' laitetta' + (query ? ` (${devicesData.length} yhteensä)` : '');
}

function setSelectValue(selectId, val) {
    const sel = document.getElementById(selectId);
    if (!val) { sel.value = ''; return; }
    const exists = Array.from(sel.options).some(o => o.value === val);
    if (!exists) {
        const opt = document.createElement('option');
        opt.value = val;
        opt.textContent = val;
        sel.appendChild(opt);
    }
    sel.value = val;
}

async function editDevice(id) {
    const d = devicesData.find(x => x.id === id);
    if (!d) return;
    document.getElementById('device-form-id').value = d.id;
    document.getElementById('device-form-nimi').value = d.nimi || '';
    document.getElementById('device-form-hallintaosoite').value = d.hallintaosoite || '';
    document.getElementById('device-form-serial').value = d.serial || '';
    setSelectValue('device-form-tyyppi', d.tyyppi || '');
    setSelectValue('device-form-funktio', d.funktio || '');
    document.getElementById('device-form-malli').value = d.malli || '';
    document.getElementById('device-form-ping-check').checked = d.ping_check || false;
    document.getElementById('device-form-lisatiedot').value = d.lisatiedot || '';
    await loadSitesForDropdown();
    document.getElementById('device-form-site').value = d.site_id || '';
    document.getElementById('device-modal-title').textContent = 'Muokkaa laitetta';
    document.getElementById('device-modal').style.display = 'flex';
}

async function deleteDevice(id, name) {
    if (!confirm(`Poistetaanko laite "${name}"?`)) return;
    try {
        await apiCall('device_delete', 'POST', { id });
        loadDevices();
    } catch (e) { alert(e.message); }
}

async function loadSitesForDropdown() {
    try {
        sitesData = await apiCall('sites');
        const sel = document.getElementById('device-form-site');
        sel.innerHTML = '<option value="">— Ei sijaintia —</option>' +
            sitesData.map(s => `<option value="${s.id}">${esc(s.nimi)}${s.kaupunki ? ' (' + esc(s.kaupunki) + ')' : ''}</option>`).join('');
    } catch (e) { console.error(e); }
}

document.getElementById('btn-add-device')?.addEventListener('click', async () => {
    document.getElementById('device-form-id').value = '';
    document.getElementById('device-form').reset();
    await loadSitesForDropdown();
    document.getElementById('device-modal-title').textContent = 'Lisää laite';
    document.getElementById('device-modal').style.display = 'flex';
});

document.getElementById('device-modal-close')?.addEventListener('click', () => {
    document.getElementById('device-modal').style.display = 'none';
});
document.getElementById('device-form-cancel')?.addEventListener('click', () => {
    document.getElementById('device-modal').style.display = 'none';
});

document.getElementById('device-form')?.addEventListener('submit', async (e) => {
    e.preventDefault();
    const id = document.getElementById('device-form-id').value;
    const data = {
        nimi: document.getElementById('device-form-nimi').value.trim(),
        hallintaosoite: document.getElementById('device-form-hallintaosoite').value.trim(),
        serial: document.getElementById('device-form-serial').value.trim(),
        site_id: document.getElementById('device-form-site').value || null,
        funktio: document.getElementById('device-form-funktio').value.trim(),
        tyyppi: document.getElementById('device-form-tyyppi').value.trim(),
        malli: document.getElementById('device-form-malli').value.trim(),
        ping_check: document.getElementById('device-form-ping-check').checked,
        lisatiedot: document.getElementById('device-form-lisatiedot').value.trim(),
    };
    if (id) data.id = id;
    try {
        await apiCall('device_save', 'POST', data);
        document.getElementById('device-modal').style.display = 'none';
        loadDevices();
    } catch (e) { alert(e.message); }
});

document.getElementById('device-search-input')?.addEventListener('input', () => renderDevices());

// ==================== TEKNIIKKA SUB-TABS ====================

function switchSubTab(target) {
    document.querySelectorAll('#tab-content-tekniikka .sub-tab').forEach(t => t.classList.remove('active'));
    document.querySelectorAll('#tab-content-tekniikka .sub-tab-content').forEach(c => c.classList.remove('active'));
    const btn = document.querySelector(`.sub-tab[data-subtab="${target}"]`);
    if (btn) btn.classList.add('active');
    const content = document.getElementById('subtab-' + target);
    if (content) content.classList.add('active');
    // Tallenna sub-tab hashiin (esim. #tekniikka/ipam)
    window.location.hash = 'tekniikka/' + target;
}

document.querySelectorAll('#tab-content-tekniikka .sub-tab').forEach(btn => {
    btn.addEventListener('click', () => switchSubTab(btn.dataset.subtab));
});

// ==================== SIJAINNIT (SITES) — TEKNIIKKA TAB ====================

let sitesTabData = [];

async function loadSitesTab() {
    try {
        sitesData = await apiCall('sites');
        sitesTabData = sitesData;
        renderSitesTab();
        renderSitesSettings(); // Päivitä myös asetuksissa
    } catch (e) { console.error(e); }
}

function renderSitesTab() {
    const query = (document.getElementById('site-search-input')?.value || '').toLowerCase().trim();
    let filtered = sitesTabData;
    if (query) {
        filtered = sitesTabData.filter(s =>
            (s.nimi || '').toLowerCase().includes(query) ||
            (s.osoite || '').toLowerCase().includes(query) ||
            (s.kaupunki || '').toLowerCase().includes(query)
        );
    }
    const tbody = document.getElementById('site-tbody');
    const noSites = document.getElementById('no-sites-tab');
    if (filtered.length === 0) {
        tbody.innerHTML = '';
        if (noSites) noSites.style.display = 'block';
    } else {
        if (noSites) noSites.style.display = 'none';
        tbody.innerHTML = filtered.map(s => {
            const deviceCount = devicesData.filter(d => d.site_id === s.id).length;
            return `<tr>
                <td><strong>${esc(s.nimi)}</strong></td>
                <td>${esc(s.osoite || '-')}</td>
                <td>${esc(s.kaupunki || '-')}</td>
                <td style="text-align:center;">${deviceCount}</td>
                <td class="actions-cell">
                    <button class="btn-link" onclick="editSiteTab('${s.id}')">✎</button>
                    <button class="btn-link" style="color:#dc2626;" onclick="deleteSite('${s.id}','${esc(s.nimi)}')">🗑</button>
                </td>
            </tr>`;
        }).join('');
    }
    document.getElementById('site-count').textContent = filtered.length + ' sijaintia';
}

function editSiteTab(id) {
    const s = sitesData.find(x => x.id === id);
    if (!s) return;
    document.getElementById('site-form-id').value = s.id;
    document.getElementById('site-form-nimi').value = s.nimi || '';
    document.getElementById('site-form-osoite').value = s.osoite || '';
    document.getElementById('site-form-kaupunki').value = s.kaupunki || '';
    document.getElementById('site-form-title').textContent = 'Muokkaa sijaintia';
    document.getElementById('site-form-container').style.display = '';
    // Varmista että asetukset-tab ja yrityksen tiedot näkyvissä, scrollaa lomakkeeseen
    switchToTab('settings');
    document.getElementById('company-detail-view').style.display = '';
    document.getElementById('companies-list-view').style.display = 'none';
    setTimeout(() => document.getElementById('site-form-container')?.scrollIntoView({ behavior: 'smooth', block: 'center' }), 100);
}

// Alias vanhalle editSite-funktiolle
function editSite(id) { editSiteTab(id); }

async function deleteSite(id, name) {
    if (!confirm(`Poistetaanko sijainti "${name}"? Laitteet joissa tämä sijainti on menettävät sijainti-viittauksen.`)) return;
    try {
        await apiCall('site_delete', 'POST', { id });
        loadSitesTab();
        loadDevices();
    } catch (e) { alert(e.message); }
}

// Renderöi sijainnit myös asetuksissa (company detail)
function renderSitesSettings() {
    const container = document.getElementById('sites-list');
    if (!container) return;
    if (sitesData.length === 0) {
        container.innerHTML = '<p style="color:#888;font-size:0.9rem;">Ei sijainteja. Lisää ensimmäinen sijainti.</p>';
        return;
    }
    container.innerHTML = sitesData.map(s => `<div style="display:flex;justify-content:space-between;align-items:center;padding:0.75rem;background:#fff;border:1px solid #e0e0e0;border-radius:8px;margin-bottom:0.5rem;">
        <div>
            <strong>${esc(s.nimi)}</strong>
            ${s.osoite ? `<span style="color:#888;font-size:0.85rem;margin-left:0.75rem;">${esc(s.osoite)}</span>` : ''}
            ${s.kaupunki ? `<span style="color:#888;font-size:0.85rem;margin-left:0.5rem;">${esc(s.kaupunki)}</span>` : ''}
        </div>
        <div style="display:flex;gap:0.5rem;">
            <button class="btn-link" onclick="editSite('${s.id}')">Muokkaa</button>
            <button class="btn-link" style="color:#dc2626;" onclick="deleteSite('${s.id}','${esc(s.nimi)}')">Poista</button>
        </div>
    </div>`).join('');
}

// Alias loadSites asetuksista kutsuun
async function loadSites() { await loadSitesTab(); }

function renderSites() { renderSitesSettings(); }

document.getElementById('site-search-input')?.addEventListener('input', () => renderSitesTab());

document.getElementById('btn-add-site')?.addEventListener('click', () => {
    document.getElementById('site-form-id').value = '';
    document.getElementById('site-form-nimi').value = '';
    document.getElementById('site-form-osoite').value = '';
    document.getElementById('site-form-kaupunki').value = '';
    document.getElementById('site-form-title').textContent = 'Uusi sijainti';
    document.getElementById('site-form-container').style.display = '';
});

document.getElementById('btn-save-site')?.addEventListener('click', async () => {
    const id = document.getElementById('site-form-id').value;
    const nimi = document.getElementById('site-form-nimi').value.trim();
    if (!nimi) return alert('Sijainnin nimi vaaditaan');
    const data = {
        nimi,
        osoite: document.getElementById('site-form-osoite').value.trim(),
        kaupunki: document.getElementById('site-form-kaupunki').value.trim(),
    };
    if (id) data.id = id;
    try {
        await apiCall('site_save', 'POST', data);
        document.getElementById('site-form-container').style.display = 'none';
        loadSitesTab();
    } catch (e) { alert(e.message); }
});

document.getElementById('btn-cancel-site')?.addEventListener('click', () => {
    document.getElementById('site-form-container').style.display = 'none';
});

// ==================== IPAM ====================

let ipamData = [];
let ipamExpandedIds = new Set();
let ipamDrillStack = []; // [{id, label}] breadcrumb

// --- IP-laskenta-apufunktiot (IPv4 + IPv6) ---
function ipv4ToBI(ip) {
    return ip.split('.').reduce((acc, oct) => (acc << 8n) + BigInt(parseInt(oct)), 0n);
}
function ipv6ToBI(ip) {
    // Expand :: shorthand
    let parts = ip.split('::');
    let left = parts[0] ? parts[0].split(':') : [];
    let right = parts.length > 1 && parts[1] ? parts[1].split(':') : [];
    const missing = 8 - left.length - right.length;
    const full = [...left, ...Array(missing).fill('0'), ...right];
    return full.reduce((acc, hex) => (acc << 16n) + BigInt(parseInt(hex || '0', 16)), 0n);
}
function parseNetwork(verkko) {
    if (!verkko) return null;
    const v = verkko.trim();
    let ip, prefix;
    if (v.includes('/')) {
        const slash = v.lastIndexOf('/');
        ip = v.substring(0, slash);
        prefix = parseInt(v.substring(slash + 1));
        if (isNaN(prefix) || prefix < 0) return null;
    } else {
        ip = v;
        prefix = null; // auto-detect
    }
    // IPv6?
    if (ip.includes(':')) {
        const maxBits = 128;
        if (prefix === null) prefix = 128;
        if (prefix > maxBits) return null;
        try {
            return { net: ipv6ToBI(ip), prefix, bits: maxBits, v6: true };
        } catch { return null; }
    }
    // IPv4
    const parts = ip.split('.');
    if (parts.length !== 4) return null;
    const maxBits = 32;
    if (prefix === null) prefix = 32;
    if (prefix > maxBits) return null;
    return { net: ipv4ToBI(ip), prefix, bits: maxBits, v6: false };
}
function isSubnetOf(childNet, childPrefix, childBits, parentNet, parentPrefix, parentBits) {
    if (childBits !== parentBits) return false; // eri perhe (v4 vs v6)
    if (childPrefix <= parentPrefix) return false;
    const shift = BigInt(parentBits - parentPrefix);
    return (childNet >> shift) === (parentNet >> shift);
}
// BigInt -> IP-osoite merkkijono
function biToIpv4(bi) {
    return [Number((bi >> 24n) & 0xFFn), Number((bi >> 16n) & 0xFFn), Number((bi >> 8n) & 0xFFn), Number(bi & 0xFFn)].join('.');
}
function biToIpv6(bi) {
    const parts = [];
    for (let i = 7; i >= 0; i--) parts.push(Number((bi >> BigInt(i * 16)) & 0xFFFFn).toString(16));
    // Yksinkertaistettu: ei :: kompressointia
    return parts.join(':');
}
function biToIp(bi, v6) { return v6 ? biToIpv6(bi) : biToIpv4(bi); }

// Laske vapaat lohkot parent-subnetin sisällä (aukot lasten välissä)
function findFreeSpaces(parentNode, maxEntries = 30) {
    if (!parentNode || parentNode.bits === 0 || parentNode.entry.tyyppi !== 'subnet') return [];
    const pNet = parentNode.net;
    const pPrefix = parentNode.prefix;
    const pBits = parentNode.bits;
    const hostBits = BigInt(pBits - pPrefix);
    const parentStart = (pNet >> hostBits) << hostBits;
    const parentSize = 1n << hostBits;
    const parentEnd = parentStart + parentSize;

    // Kerää lapset samasta osoiteperheestä, järjestä osoitteen mukaan
    const children = parentNode.children
        .filter(c => c.bits === pBits)
        .sort((a, b) => a.net < b.net ? -1 : a.net > b.net ? 1 : 0);

    const result = [];
    let pos = parentStart;

    for (const child of children) {
        const cHostBits = BigInt(pBits - child.prefix);
        const childStart = (child.net >> cHostBits) << cHostBits;
        const childEnd = childStart + (1n << cHostBits);
        if (pos < childStart) {
            addAlignedBlocks(result, pos, childStart, pBits, pBits === 128, maxEntries - result.length);
        }
        if (childEnd > pos) pos = childEnd;
    }
    if (pos < parentEnd) {
        addAlignedBlocks(result, pos, parentEnd, pBits, pBits === 128, maxEntries - result.length);
    }
    return result;
}

function addAlignedBlocks(result, start, end, totalBits, v6, maxAdd) {
    let pos = start;
    const tb = BigInt(totalBits);
    while (pos < end && maxAdd > 0) {
        const space = end - pos;
        // Alignment: kuinka monta trailing nollaa pos:ssa
        let alignBits = 0n;
        if (pos === 0n) {
            alignBits = tb;
        } else {
            let tmp = pos;
            while ((tmp & 1n) === 0n && alignBits < tb) { alignBits++; tmp >>= 1n; }
        }
        // Suurin 2^n joka mahtuu tilaan
        let spaceBits = 0n;
        let tmp = space >> 1n;
        while (tmp > 0n) { spaceBits++; tmp >>= 1n; }
        // Tarkista ettei ylitä
        if ((1n << spaceBits) > space) spaceBits--;
        const blockBits = alignBits < spaceBits ? alignBits : spaceBits;
        if (blockBits < 0n) break;
        const prefix = totalBits - Number(blockBits);
        result.push({ net: pos, prefix, bits: totalBits, v6, verkko: biToIp(pos, v6) + '/' + prefix });
        pos += (1n << blockBits);
        maxAdd--;
    }
}

// Laske subnetin käyttöaste: kuinka monta lasta (direct children) vs kapasiteetti
function subnetUsageHtml(node) {
    if (node.entry.tyyppi !== 'subnet' || node.children.length === 0) return '';
    const childCount = node.children.length;
    // Laske kuinka monta "slottia" tässä subnetissa on seuraavalla tasolla
    // Etsi yleisin lapsi-prefix
    const childPrefixes = node.children.filter(c => c.prefix > node.prefix).map(c => c.prefix);
    if (childPrefixes.length === 0) return `<span class="ipam-usage">${childCount}</span>`;
    // Käytä pienintä child-prefixiä (isoimpia aliverkkoja) kapasiteetin laskuun
    const commonPrefix = Math.min(...childPrefixes);
    const bits = node.entry.tyyppi === 'subnet' ? (node.children[0]?.bits || 32) : 32;
    const slotBits = commonPrefix - node.prefix;
    if (slotBits <= 0 || slotBits > 20) return `<span class="ipam-usage">${childCount}</span>`;
    const totalSlots = 1 << slotBits; // 2^slotBits
    const sameLevel = node.children.filter(c => c.prefix === commonPrefix).length;
    const freeSlots = totalSlots - sameLevel;
    return `<span class="ipam-usage" title="${sameLevel}/${totalSlots} /${commonPrefix} käytössä">${sameLevel}/${totalSlots}</span>`;
}

// --- Puurakenne ---
function buildIpamTree(entries) {
    // Parsitaan verkko-osoitteet; ei-parsittavat lisätään juureen sellaisenaan
    const unparsed = [];
    const items = [];
    for (const e of entries) {
        const parsed = parseNetwork(e.verkko);
        if (parsed) {
            items.push({ entry: e, net: parsed.net, prefix: parsed.prefix, bits: parsed.bits, v6: parsed.v6, children: [] });
        } else {
            unparsed.push({ entry: e, net: 0n, prefix: 0, bits: 0, v6: false, children: [] });
        }
    }
    // Järjestetään: v4 ennen v6, pienin prefix ensin, sitten osoitteen mukaan
    items.sort((a, b) => {
        if (a.v6 !== b.v6) return a.v6 ? 1 : -1;
        if (a.prefix !== b.prefix) return a.prefix - b.prefix;
        return a.net < b.net ? -1 : a.net > b.net ? 1 : 0;
    });
    const roots = [];
    for (const item of items) {
        // Etsi lähin parent (suurin prefix joka sisältää tämän)
        const findParent = (nodes) => {
            for (let i = nodes.length - 1; i >= 0; i--) {
                const node = nodes[i];
                if (isSubnetOf(item.net, item.prefix, item.bits, node.net, node.prefix, node.bits)) {
                    // Tarkista ensin onko jokin lapsi tarkempi parent
                    if (!findParent(node.children)) {
                        node.children.push(item);
                    }
                    return true;
                }
            }
            return false;
        };
        if (!findParent(roots)) {
            roots.push(item);
        }
    }
    // Lisää ei-parsittavat (esim. virheelliset osoitteet) juureen
    roots.push(...unparsed);
    return roots;
}

function flattenTree(nodes, depth, drillId) {
    // Jos drill-down aktiivinen, etsi drill-node ja renderöi vain sen lapset
    if (drillId) {
        const findNode = (list) => {
            for (const n of list) {
                if (n.entry.id === drillId) return n;
                const found = findNode(n.children);
                if (found) return found;
            }
            return null;
        };
        const drillNode = findNode(nodes);
        if (drillNode) {
            nodes = drillNode.children;
            depth = 0;
        }
    }
    const rows = [];
    const render = (list, d) => {
        for (const node of list) {
            const hasChildren = node.children.length > 0;
            const expanded = ipamExpandedIds.has(node.entry.id);
            rows.push({ entry: node.entry, depth: d, hasChildren, expanded, node, isFree: false });
            if (hasChildren && expanded) {
                // Laske vapaat lohkot vain jos verkko ei ole varattu
                const freeSpaces = node.entry.tila === 'varattu' ? [] : findFreeSpaces(node);
                if (freeSpaces.length > 0) {
                    // Yhdistä lapset + vapaat, järjestä osoitteen mukaan
                    const allItems = [
                        ...node.children.map(c => ({ type: 'node', item: c, sortKey: c.net })),
                        ...freeSpaces.map(f => ({ type: 'free', item: f, sortKey: f.net }))
                    ];
                    allItems.sort((a, b) => a.sortKey < b.sortKey ? -1 : a.sortKey > b.sortKey ? 1 : 0);
                    for (const ai of allItems) {
                        if (ai.type === 'node') {
                            render([ai.item], d + 1);
                        } else {
                            rows.push({
                                entry: { verkko: ai.item.verkko, tyyppi: 'free', nimi: '', tila: 'vapaa' },
                                depth: d + 1, hasChildren: false, expanded: false, node: ai.item, isFree: true
                            });
                        }
                    }
                } else {
                    render(node.children, d + 1);
                }
            }
        }
    };
    render(nodes, depth);
    return rows;
}

async function loadIpam() {
    try {
        ipamData = await apiCall('ipam');
        renderIpam();
    } catch (e) { console.error(e); }
}

function renderIpam() {
    const query = (document.getElementById('ipam-search-input')?.value || '').toLowerCase().trim();

    // --- Verkot + IP:t (hierarkkinen puu) ---
    let networkEntries = ipamData.filter(e => e.tyyppi === 'subnet' || e.tyyppi === 'ip');
    if (query) {
        networkEntries = networkEntries.filter(e =>
            (e.tyyppi || '').toLowerCase().includes(query) ||
            (e.verkko || '').toLowerCase().includes(query) ||
            (e.nimi || '').toLowerCase().includes(query) ||
            (e.site_name || '').toLowerCase().includes(query) ||
            (e.lisatiedot || '').toLowerCase().includes(query) ||
            String(e.vlan_id || '').includes(query)
        );
    }

    const tree = buildIpamTree(networkEntries);

    // Breadcrumb
    const bcEl = document.getElementById('ipam-breadcrumb');
    if (bcEl) {
        const drillId = ipamDrillStack.length > 0 ? ipamDrillStack[ipamDrillStack.length - 1].id : null;
        if (ipamDrillStack.length === 0) {
            bcEl.style.display = 'none';
        } else {
            bcEl.style.display = '';
            bcEl.innerHTML = `<span class="ipam-bc-link" onclick="ipamDrillTo(-1)">Kaikki verkot</span>` +
                ipamDrillStack.map((s, i) =>
                    ` <span style="color:#aaa;">›</span> <span class="ipam-bc-link${i === ipamDrillStack.length - 1 ? ' ipam-bc-current' : ''}" onclick="ipamDrillTo(${i})">${esc(s.label)}</span>`
                ).join('');
        }
        // Flatten tree siten että drill-down huomioidaan
        var drillTarget = drillId;
    } else {
        var drillTarget = null;
    }

    const rows = flattenTree(tree, 0, drillTarget);

    const tbody = document.getElementById('ipam-tbody');
    const noIpam = document.getElementById('no-ipam');
    const tilaClass = { vapaa: 'ipam-tila-vapaa', varattu: 'ipam-tila-varattu', reserved: 'ipam-tila-reserved' };
    const tilaLabel = { vapaa: 'Vapaa', varattu: 'Varattu', reserved: 'Reserved' };

    if (rows.length === 0 && !query) {
        tbody.innerHTML = '';
        if (noIpam) noIpam.style.display = 'block';
    } else {
        if (noIpam) noIpam.style.display = 'none';
        tbody.innerHTML = rows.map(r => {
            const e = r.entry;
            const indent = r.depth * 1.5;

            // Vapaa-lohko (ei oikea entry, vaan laskettu vapaa tila)
            if (r.isFree) {
                return `<tr class="ipam-tree-row ipam-free-row" onclick="ipamAddFromFree('${esc(e.verkko)}')" title="Klikkaa varataksesi tämä verkko" style="cursor:pointer;">
                    <td style="padding-left:${indent}rem;white-space:nowrap;">
                        <span class="ipam-toggle-placeholder"></span> <span class="ipam-type-free">Vapaa</span>
                    </td>
                    <td><code class="ipam-network ipam-network-free">${esc(e.verkko)}</code></td>
                    <td colspan="4" style="color:#999;font-style:italic;">Klikkaa varataksesi</td>
                </tr>`;
            }

            const toggleIcon = r.hasChildren
                ? `<span class="ipam-toggle" onclick="event.stopPropagation();ipamToggle('${e.id}')">${r.expanded ? '▼' : '▶'}</span> `
                : '<span class="ipam-toggle-placeholder"></span> ';
            const typeTag = e.tyyppi === 'subnet'
                ? '<span class="ipam-type-subnet">Subnet</span>'
                : '<span class="ipam-type-ip">IP</span>';
            const drillBtn = (e.tyyppi === 'subnet' && r.hasChildren)
                ? ` <span class="ipam-drill" onclick="event.stopPropagation();ipamDrillInto('${e.id}','${esc(e.verkko || e.nimi)}')" title="Poraudu sisään">→</span>`
                : '';
            return `<tr class="ipam-tree-row" onclick="ipamToggle('${e.id}')">
                <td style="padding-left:${indent}rem;white-space:nowrap;">
                    ${toggleIcon}${typeTag}
                </td>
                <td><code class="ipam-network">${esc(e.verkko || '-')}</code>${drillBtn} ${subnetUsageHtml(r.node)}</td>
                <td>${esc(e.nimi || '-')}</td>
                <td>${vlanRefHtml(e.vlan_id)}</td>
                <td>${e.site_name ? esc(e.site_name) : '<span style="color:#ccc;">—</span>'}</td>
                <td><span class="ipam-tila ${tilaClass[e.tila] || ''}">${tilaLabel[e.tila] || e.tila}</span></td>
                <td class="actions-cell" onclick="event.stopPropagation()">
                    <button class="btn-link" onclick="editIpam('${e.id}')">✎</button>
                    <button class="btn-link" style="color:#dc2626;" onclick="deleteIpam('${e.id}','${esc(e.nimi || e.verkko)}')">🗑</button>
                </td>
            </tr>`;
        }).join('');
    }

    const netCount = networkEntries.length;
    document.getElementById('ipam-count').textContent = netCount + ' verkkoa/IP:tä' + (query ? ` (${ipamData.filter(e => e.tyyppi !== 'vlan').length} yhteensä)` : '');

    // --- VLANit ---
    renderIpamVlans(query);
}

function renderIpamVlans(query) {
    let vlans = ipamData.filter(e => e.tyyppi === 'vlan');
    if (query) {
        vlans = vlans.filter(e =>
            String(e.vlan_id || '').includes(query) ||
            (e.nimi || '').toLowerCase().includes(query) ||
            (e.verkko || '').toLowerCase().includes(query) ||
            (e.site_name || '').toLowerCase().includes(query)
        );
    }
    vlans.sort((a, b) => (a.vlan_id || 0) - (b.vlan_id || 0));

    const tbody = document.getElementById('ipam-vlan-tbody');
    const section = document.getElementById('ipam-vlan-section');
    if (!tbody) return;

    const tilaClass = { vapaa: 'ipam-tila-vapaa', varattu: 'ipam-tila-varattu', reserved: 'ipam-tila-reserved' };
    const tilaLabel = { vapaa: 'Vapaa', varattu: 'Varattu', reserved: 'Reserved' };

    if (section) section.style.display = '';
    if (vlans.length === 0) {
        tbody.innerHTML = '<tr><td colspan="6" style="text-align:center;color:#aaa;padding:1rem;">Ei VLANeja vielä.</td></tr>';
    } else {
        tbody.innerHTML = vlans.map(e => `<tr>
            <td><strong>${e.vlan_id || '-'}</strong></td>
            <td><code style="font-size:0.85rem;">${esc(e.verkko || '-')}</code></td>
            <td>${esc(e.nimi || '-')}</td>
            <td>${e.site_name ? esc(e.site_name) : '<span style="color:#ccc;">—</span>'}</td>
            <td><span class="ipam-tila ${tilaClass[e.tila] || ''}">${tilaLabel[e.tila] || e.tila}</span></td>
            <td class="actions-cell">
                <button class="btn-link" onclick="editIpam('${e.id}')">✎</button>
                <button class="btn-link" style="color:#dc2626;" onclick="deleteIpam('${e.id}','${esc(e.nimi || e.verkko)}')">🗑</button>
            </td>
        </tr>`).join('');
    }
    document.getElementById('ipam-vlan-count').textContent = vlans.length + ' VLANia';
}

// --- VLAN-viite apufunktio ---
function vlanRefHtml(vlanId) {
    if (!vlanId) return '<span style="color:#ccc;">—</span>';
    const vl = ipamData.find(v => v.tyyppi === 'vlan' && String(v.vlan_id) === String(vlanId));
    const label = vl ? esc(vl.nimi) : '';
    return `<strong>${vlanId}</strong>${label ? ` <small style="color:#888;">${label}</small>` : ''}`;
}

// --- Toggle & Drill ---
function ipamToggle(id) {
    if (ipamExpandedIds.has(id)) ipamExpandedIds.delete(id);
    else ipamExpandedIds.add(id);
    renderIpam();
}
function ipamDrillInto(id, label) {
    ipamDrillStack.push({ id, label });
    ipamExpandedIds.clear(); // reset expand-tila uudessa näkymässä
    renderIpam();
}
function ipamDrillTo(index) {
    if (index < 0) {
        ipamDrillStack = [];
    } else {
        ipamDrillStack = ipamDrillStack.slice(0, index + 1);
    }
    ipamExpandedIds.clear();
    renderIpam();
}

async function ipamAddFromFree(verkko) {
    document.getElementById('ipam-form-id').value = '';
    document.getElementById('ipam-form').reset();
    document.getElementById('ipam-form-tyyppi').value = 'subnet';
    document.getElementById('ipam-form-verkko').value = verkko;
    document.getElementById('ipam-form-tila').value = 'varattu';
    await loadIpamSitesDropdown();
    document.getElementById('ipam-modal-title').textContent = 'Lisää verkko / IP';
    document.getElementById('ipam-modal').style.display = 'flex';
    // Fokusoi nimi-kenttään koska verkko on jo täytetty
    document.getElementById('ipam-form-nimi')?.focus();
}

async function loadIpamSitesDropdown() {
    try {
        if (!sitesData || sitesData.length === 0) sitesData = await apiCall('sites');
        const sel = document.getElementById('ipam-form-site');
        sel.innerHTML = '<option value="">— Ei sijaintia —</option>' +
            sitesData.map(s => `<option value="${s.id}">${esc(s.nimi)}${s.kaupunki ? ' (' + esc(s.kaupunki) + ')' : ''}</option>`).join('');
    } catch (e) { console.error(e); }
}

async function editIpam(id) {
    const e = ipamData.find(x => x.id === id);
    if (!e) return;
    document.getElementById('ipam-form-id').value = e.id;
    document.getElementById('ipam-form-tyyppi').value = e.tyyppi || 'ip';
    document.getElementById('ipam-form-verkko').value = e.verkko || '';
    document.getElementById('ipam-form-nimi').value = e.nimi || '';
    document.getElementById('ipam-form-tila').value = e.tila || 'vapaa';
    document.getElementById('ipam-form-lisatiedot').value = e.lisatiedot || '';
    document.getElementById('ipam-form-vlan').value = e.vlan_id || '';
    await loadIpamSitesDropdown();
    document.getElementById('ipam-form-site').value = e.site_id || '';
    document.getElementById('ipam-modal-title').textContent = e.tyyppi === 'vlan' ? 'Muokkaa VLANia' : 'Muokkaa verkkoa / IP:tä';
    document.getElementById('ipam-modal').style.display = 'flex';
}

async function deleteIpam(id, name) {
    if (!confirm(`Poistetaanko IPAM-merkintä "${name}"?`)) return;
    try {
        await apiCall('ipam_delete', 'POST', { id });
        loadIpam();
    } catch (e) { alert(e.message); }
}

document.getElementById('btn-add-ipam')?.addEventListener('click', async () => {
    document.getElementById('ipam-form-id').value = '';
    document.getElementById('ipam-form').reset();
    document.getElementById('ipam-form-tyyppi').value = 'subnet';
    document.getElementById('ipam-form-tila').value = 'varattu';
    await loadIpamSitesDropdown();
    document.getElementById('ipam-modal-title').textContent = 'Lisää verkko / IP';
    document.getElementById('ipam-modal').style.display = 'flex';
});

document.getElementById('btn-add-vlan')?.addEventListener('click', async () => {
    document.getElementById('ipam-form-id').value = '';
    document.getElementById('ipam-form').reset();
    document.getElementById('ipam-form-tyyppi').value = 'vlan';
    document.getElementById('ipam-form-tila').value = 'varattu';
    await loadIpamSitesDropdown();
    document.getElementById('ipam-modal-title').textContent = 'Lisää VLAN';
    document.getElementById('ipam-modal').style.display = 'flex';
});

document.getElementById('ipam-modal-close')?.addEventListener('click', () => {
    document.getElementById('ipam-modal').style.display = 'none';
});
document.getElementById('ipam-form-cancel')?.addEventListener('click', () => {
    document.getElementById('ipam-modal').style.display = 'none';
});

document.getElementById('ipam-form')?.addEventListener('submit', async (e) => {
    e.preventDefault();
    const id = document.getElementById('ipam-form-id').value;
    const data = {
        tyyppi: document.getElementById('ipam-form-tyyppi').value,
        verkko: document.getElementById('ipam-form-verkko').value.trim(),
        vlan_id: document.getElementById('ipam-form-vlan').value || null,
        nimi: document.getElementById('ipam-form-nimi').value.trim(),
        site_id: document.getElementById('ipam-form-site').value || null,
        tila: document.getElementById('ipam-form-tila').value,
        lisatiedot: document.getElementById('ipam-form-lisatiedot').value.trim(),
    };
    if (id) data.id = id;
    try {
        const res = await fetch(`${API}?action=ipam_save`, {
            method: 'POST', credentials: 'include',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(data)
        });
        const result = await res.json();
        if (res.status === 409 && result.warning) {
            if (confirm(result.warning)) {
                data.force = true;
                await apiCall('ipam_save', 'POST', data);
            } else {
                return;
            }
        } else if (!res.ok) {
            throw new Error(result.error || 'Virhe');
        }
        document.getElementById('ipam-modal').style.display = 'none';
        loadIpam();
    } catch (e) { alert(e.message); }
});

document.getElementById('ipam-search-input')?.addEventListener('input', () => renderIpam());

// ==================== OHJEET ====================

let guidesData = [];
let guideCategories = [];
let currentGuideId = null;

// Markdown-renderöijä (kevyt, ei ulkoisia kirjastoja)
// Kuva-lightbox ohjeissa
function openGuideLightbox(src, alt) {
    let overlay = document.getElementById('guide-lightbox');
    if (!overlay) {
        overlay = document.createElement('div');
        overlay.id = 'guide-lightbox';
        overlay.style.cssText = 'position:fixed;inset:0;background:rgba(0,0,0,0.85);display:flex;align-items:center;justify-content:center;z-index:10000;cursor:zoom-out;padding:2rem;';
        overlay.addEventListener('click', () => overlay.style.display = 'none');
        document.body.appendChild(overlay);
    }
    overlay.innerHTML = `<img src="${src}" alt="${alt}" style="max-width:95%;max-height:95%;border-radius:8px;box-shadow:0 8px 40px rgba(0,0,0,0.5);">`;
    overlay.style.display = 'flex';
}

function renderMarkdown(md) {
    if (!md) return '';
    let html = esc(md);
    // Koodilohkot ``` ... ```
    html = html.replace(/```(\w*)\n([\s\S]*?)```/g, (m, lang, code) => `<pre><code>${code}</code></pre>`);
    // Inline-koodi
    html = html.replace(/`([^`]+)`/g, '<code>$1</code>');
    // Otsikot
    html = html.replace(/^### (.+)$/gm, '<h3>$1</h3>');
    html = html.replace(/^## (.+)$/gm, '<h2>$1</h2>');
    html = html.replace(/^# (.+)$/gm, '<h1>$1</h1>');
    // Lihavointi + kursiivi
    html = html.replace(/\*\*\*(.+?)\*\*\*/g, '<strong><em>$1</em></strong>');
    html = html.replace(/\*\*(.+?)\*\*/g, '<strong>$1</strong>');
    html = html.replace(/\*(.+?)\*/g, '<em>$1</em>');
    // Kuvat (ennen linkkejä!) — klikkaa avataksesi isompana
    html = html.replace(/!\[([^\]]*)\]\(([^)]+)\)/g, '<img src="$2" alt="$1" class="guide-img" onclick="openGuideLightbox(this.src, this.alt)" title="Klikkaa suurentaaksesi">');
    // Linkit
    html = html.replace(/\[([^\]]+)\]\(([^)]+)\)/g, '<a href="$2" target="_blank" rel="noopener">$1</a>');
    // Lainaukset
    html = html.replace(/^&gt; (.+)$/gm, '<blockquote>$1</blockquote>');
    // Vaakaviiva
    html = html.replace(/^---$/gm, '<hr>');
    // Listat: kerätään peräkkäiset lista-rivit yhteen
    html = html.replace(/(^[\-\*] .+\n?)+/gm, (match) => {
        const items = match.trim().split('\n').map(l => '<li>' + l.replace(/^[\-\*] /, '') + '</li>').join('');
        return '<ul>' + items + '</ul>';
    });
    html = html.replace(/(^\d+\. .+\n?)+/gm, (match) => {
        const items = match.trim().split('\n').map(l => '<li>' + l.replace(/^\d+\. /, '') + '</li>').join('');
        return '<ol>' + items + '</ol>';
    });
    // Kappalejaot
    html = html.replace(/\n\n/g, '</p><p>');
    html = html.replace(/\n/g, '<br>');
    return '<p>' + html + '</p>';
}

async function loadGuides() {
    try {
        [guidesData, guideCategories] = await Promise.all([
            apiCall('guides'),
            apiCall('guide_categories')
        ]);
        populateGuideCategoryFilter();
        renderGuidesList();
        showGuideListView();
        const isAdmin = currentUser?.role === 'admin' || currentUser?.role === 'superadmin';
        document.getElementById('btn-add-guide').style.display = isAdmin ? '' : 'none';
        document.getElementById('btn-manage-guide-cats').style.display = isAdmin ? '' : 'none';
    } catch (e) { console.error(e); }
}

function populateGuideCategoryFilter() {
    const sel = document.getElementById('guide-category-filter');
    const formSel = document.getElementById('guide-form-category');
    const opts = guideCategories.map(c => `<option value="${c.id}">${esc(c.nimi)}</option>`).join('');
    if (sel) sel.innerHTML = '<option value="">Kaikki kategoriat</option>' + opts;
    if (formSel) formSel.innerHTML = '<option value="">Ei kategoriaa</option>' + opts;
}

function renderGuidesList() {
    const query = (document.getElementById('guide-search-input')?.value || '').toLowerCase().trim();
    const catFilter = document.getElementById('guide-category-filter')?.value || '';

    let filtered = guidesData;
    if (catFilter) filtered = filtered.filter(g => g.category_id === catFilter);
    if (query) {
        filtered = filtered.filter(g =>
            (g.title || '').toLowerCase().includes(query) ||
            (g.tags || '').toLowerCase().includes(query) ||
            (g.category_name || '').toLowerCase().includes(query) ||
            (g.content || '').toLowerCase().includes(query)
        );
    }

    const grid = document.getElementById('guides-grid');
    const noGuides = document.getElementById('no-guides');
    if (!grid) return;

    if (filtered.length === 0) {
        grid.innerHTML = '';
        if (noGuides) noGuides.style.display = 'block';
    } else {
        if (noGuides) noGuides.style.display = 'none';
        grid.innerHTML = filtered.map(g => {
            const preview = (g.content || '').substring(0, 150).replace(/[#*`\[\]]/g, '');
            const tags = (g.tags || '').split(',').filter(t => t.trim());
            return `<div class="guide-card ${g.pinned ? 'guide-pinned' : ''}" onclick="openGuideRead('${g.id}')">
                <div class="guide-card-header">
                    ${g.pinned ? '<span class="guide-pin-icon" title="Kiinnitetty">&#128204;</span>' : ''}
                    ${g.category_name ? `<span class="guide-category-badge">${esc(g.category_name)}</span>` : ''}
                </div>
                <h3 class="guide-card-title">${esc(g.title)}</h3>
                <p class="guide-card-preview">${esc(preview)}${(g.content || '').length > 150 ? '...' : ''}</p>
                <div class="guide-card-footer">
                    <span>${esc(g.author || '')}</span>
                    <span>${timeAgo(g.muokattu || g.luotu)}</span>
                </div>
                ${tags.length > 0 ? `<div class="guide-card-tags">${tags.map(t => `<span class="guide-tag">${esc(t.trim())}</span>`).join('')}</div>` : ''}
            </div>`;
        }).join('');
    }
}

function showGuideListView() {
    document.getElementById('guides-list-view').style.display = '';
    document.getElementById('guide-read-view').style.display = 'none';
    document.getElementById('guide-edit-view').style.display = 'none';
}
function showGuideReadView() {
    document.getElementById('guides-list-view').style.display = 'none';
    document.getElementById('guide-read-view').style.display = '';
    document.getElementById('guide-edit-view').style.display = 'none';
}
function showGuideEditView() {
    document.getElementById('guides-list-view').style.display = 'none';
    document.getElementById('guide-read-view').style.display = 'none';
    document.getElementById('guide-edit-view').style.display = '';
}

async function openGuideRead(id) {
    try {
        const guide = await apiCall('guide&id=' + encodeURIComponent(id));
        currentGuideId = id;
        document.getElementById('guide-read-title').textContent = guide.title;
        document.getElementById('guide-read-meta').innerHTML = [
            guide.category_name ? `<span>&#128193; ${esc(guide.category_name)}</span>` : '',
            `<span>&#9998; ${esc(guide.author || 'Tuntematon')}</span>`,
            `<span>&#128197; ${esc((guide.luotu || '').substring(0, 10))}</span>`,
            guide.muokattu ? `<span>Päivitetty: ${timeAgo(guide.muokattu)} (${esc(guide.muokkaaja || '')})</span>` : ''
        ].filter(Boolean).join('');
        document.getElementById('guide-read-content').innerHTML = renderMarkdown(guide.content);
        const tags = (guide.tags || '').split(',').filter(t => t.trim());
        document.getElementById('guide-read-tags').innerHTML = tags.length > 0
            ? tags.map(t => `<span class="guide-tag">${esc(t.trim())}</span>`).join(' ')
            : '';
        const isAdmin = currentUser?.role === 'admin' || currentUser?.role === 'superadmin';
        document.getElementById('guide-read-actions').style.display = isAdmin ? 'block' : 'none';
        showGuideReadView();
    } catch (e) { alert(e.message); }
}

function openGuideEdit(guide) {
    document.getElementById('guide-edit-title').textContent = guide ? 'Muokkaa ohjetta' : 'Uusi ohje';
    document.getElementById('guide-form-id').value = guide ? guide.id : '';
    document.getElementById('guide-form-title').value = guide ? guide.title : '';
    document.getElementById('guide-form-content').value = guide ? guide.content : '';
    document.getElementById('guide-form-tags').value = guide ? (guide.tags || '') : '';
    document.getElementById('guide-form-pinned').checked = guide ? guide.pinned : false;
    document.getElementById('guide-form-content').style.display = '';
    document.getElementById('guide-preview-pane').style.display = 'none';
    populateGuideCategoryFilter();
    if (guide) document.getElementById('guide-form-category').value = guide.category_id || '';
    showGuideEditView();
    document.getElementById('guide-form-title').focus();
}

// Tallenna ohje
document.getElementById('guide-form')?.addEventListener('submit', async (e) => {
    e.preventDefault();
    const id = document.getElementById('guide-form-id').value;
    const body = {
        title: document.getElementById('guide-form-title').value.trim(),
        category_id: document.getElementById('guide-form-category').value || null,
        content: document.getElementById('guide-form-content').value,
        tags: document.getElementById('guide-form-tags').value.trim(),
        pinned: document.getElementById('guide-form-pinned').checked,
    };
    if (id) {
        body.id = id;
        const existing = guidesData.find(g => g.id === id);
        if (existing) { body.luotu = existing.luotu; body.author = existing.author; }
    }
    try {
        const saved = await apiCall('guide_save', 'POST', body);
        await loadGuides();
        openGuideRead(saved.id);
    } catch (e) { alert(e.message); }
});

async function deleteGuide(id) {
    if (!confirm('Haluatko varmasti poistaa tämän ohjeen?')) return;
    try {
        await apiCall('guide_delete', 'POST', { id });
        await loadGuides();
        showGuideListView();
    } catch (e) { alert(e.message); }
}

// Event listenerit
document.getElementById('guide-search-input')?.addEventListener('input', () => renderGuidesList());
document.getElementById('guide-category-filter')?.addEventListener('change', () => renderGuidesList());
document.getElementById('btn-add-guide')?.addEventListener('click', () => openGuideEdit(null));
document.getElementById('btn-guide-back')?.addEventListener('click', () => { showGuideListView(); currentGuideId = null; });
document.getElementById('btn-guide-edit-cancel')?.addEventListener('click', () => {
    if (currentGuideId) openGuideRead(currentGuideId); else showGuideListView();
});
document.getElementById('guide-form-cancel')?.addEventListener('click', () => {
    if (currentGuideId) openGuideRead(currentGuideId); else showGuideListView();
});
document.getElementById('btn-edit-guide')?.addEventListener('click', () => {
    const guide = guidesData.find(g => g.id === currentGuideId);
    if (guide) openGuideEdit(guide);
});
document.getElementById('btn-delete-guide')?.addEventListener('click', () => {
    if (currentGuideId) deleteGuide(currentGuideId);
});

// Markdown toolbar
document.querySelectorAll('.guide-tb-btn[data-md]').forEach(btn => {
    btn.addEventListener('click', () => {
        const ta = document.getElementById('guide-form-content');
        const start = ta.selectionStart;
        const end = ta.selectionEnd;
        const sel = ta.value.substring(start, end);
        let ins = '';
        switch (btn.dataset.md) {
            case 'bold': ins = `**${sel || 'teksti'}**`; break;
            case 'italic': ins = `*${sel || 'teksti'}*`; break;
            case 'h2': ins = `\n## ${sel || 'Otsikko'}\n`; break;
            case 'h3': ins = `\n### ${sel || 'Alaotsikko'}\n`; break;
            case 'ul': ins = `\n- ${sel || 'kohta'}\n`; break;
            case 'ol': ins = `\n1. ${sel || 'kohta'}\n`; break;
            case 'link': ins = `[${sel || 'linkki'}](https://)`; break;
            case 'code': ins = sel.includes('\n') ? `\n\`\`\`\n${sel}\n\`\`\`\n` : `\`${sel || 'koodi'}\``; break;
            case 'quote': ins = `\n> ${sel || 'lainaus'}\n`; break;
        }
        ta.value = ta.value.substring(0, start) + ins + ta.value.substring(end);
        ta.focus();
        ta.selectionStart = ta.selectionEnd = start + ins.length;
    });
});

// Esikatselu-toggle
document.getElementById('btn-guide-preview-toggle')?.addEventListener('click', () => {
    const ta = document.getElementById('guide-form-content');
    const preview = document.getElementById('guide-preview-pane');
    if (ta.style.display !== 'none') {
        preview.innerHTML = renderMarkdown(ta.value);
        ta.style.display = 'none';
        preview.style.display = '';
    } else {
        ta.style.display = '';
        preview.style.display = 'none';
    }
});

// Kuva-upload: yhteinen upload-funktio
async function guideUploadImage(file) {
    const ta = document.getElementById('guide-form-content');
    if (!ta) return;
    const pos = ta.selectionStart;
    // Näytä upload-placeholder
    const placeholder = `![Ladataan: ${file.name}...]()`;
    ta.value = ta.value.substring(0, pos) + placeholder + ta.value.substring(ta.selectionEnd);
    ta.focus();
    const formData = new FormData();
    formData.append('image', file);
    try {
        const res = await fetch(`${API}?action=guide_image_upload`, {
            method: 'POST', credentials: 'include', body: formData
        });
        const result = await res.json();
        if (!res.ok) throw new Error(result.error || 'Virhe');
        const mdImg = `![${file.name}](${result.url})`;
        ta.value = ta.value.replace(placeholder, mdImg);
    } catch (err) {
        ta.value = ta.value.replace(placeholder, '');
        alert('Kuvan lataus epäonnistui: ' + err.message);
    }
}

// Toolbar-nappi
document.getElementById('btn-guide-image')?.addEventListener('click', () => {
    document.getElementById('guide-image-input')?.click();
});
document.getElementById('guide-image-input')?.addEventListener('change', async (e) => {
    const file = e.target.files[0];
    if (file) await guideUploadImage(file);
    e.target.value = '';
});

// Paste screenshot leikepöydältä (Ctrl+V / Cmd+V)
document.getElementById('guide-form-content')?.addEventListener('paste', async (e) => {
    const items = e.clipboardData?.items;
    if (!items) return;
    for (const item of items) {
        if (item.type.startsWith('image/')) {
            e.preventDefault();
            const file = item.getAsFile();
            if (file) {
                // Anna tiedostolle nimi aikaleimalla
                const ext = file.type.split('/')[1] || 'png';
                const named = new File([file], `screenshot-${Date.now()}.${ext}`, { type: file.type });
                await guideUploadImage(named);
            }
            return;
        }
    }
});

// Drag & drop kuvat editoriin
const guideTA = document.getElementById('guide-form-content');
if (guideTA) {
    guideTA.addEventListener('dragover', (e) => {
        if (e.dataTransfer?.types?.includes('Files')) {
            e.preventDefault();
            guideTA.style.borderColor = 'var(--primary-color)';
            guideTA.style.background = '#f0f7ff';
        }
    });
    guideTA.addEventListener('dragleave', () => {
        guideTA.style.borderColor = '';
        guideTA.style.background = '';
    });
    guideTA.addEventListener('drop', async (e) => {
        guideTA.style.borderColor = '';
        guideTA.style.background = '';
        const files = e.dataTransfer?.files;
        if (!files?.length) return;
        for (const file of files) {
            if (file.type.startsWith('image/')) {
                e.preventDefault();
                await guideUploadImage(file);
            }
        }
    });
}

// Kategorianhallinta
document.getElementById('btn-manage-guide-cats')?.addEventListener('click', () => {
    renderGuideCatList();
    document.getElementById('guide-cat-modal').style.display = 'flex';
});
document.getElementById('guide-cat-modal-close')?.addEventListener('click', () => {
    document.getElementById('guide-cat-modal').style.display = 'none';
});

function renderGuideCatList() {
    const list = document.getElementById('guide-cat-list');
    if (!list) return;
    if (guideCategories.length === 0) {
        list.innerHTML = '<p style="color:#888;font-size:0.9rem;">Ei kategorioita.</p>';
        return;
    }
    list.innerHTML = guideCategories.map(c => `
        <div style="display:flex;align-items:center;gap:0.5rem;padding:0.5rem 0;border-bottom:1px solid #f0f0f0;">
            <span style="flex:1;font-weight:600;">${esc(c.nimi)}</span>
            <button onclick="deleteGuideCategory('${c.id}','${esc(c.nimi)}')" class="btn-link" style="color:#dc2626;" title="Poista">&times;</button>
        </div>
    `).join('');
}

document.getElementById('btn-guide-cat-add')?.addEventListener('click', async () => {
    const inp = document.getElementById('guide-cat-new-name');
    const nimi = inp.value.trim();
    if (!nimi) return;
    try {
        await apiCall('guide_category_save', 'POST', { nimi, sort_order: guideCategories.length });
        inp.value = '';
        guideCategories = await apiCall('guide_categories');
        renderGuideCatList();
        populateGuideCategoryFilter();
    } catch (e) { alert(e.message); }
});

async function deleteGuideCategory(id, name) {
    if (!confirm(`Poista kategoria "${name}"? Ohjeet siirtyvät kategoriattomiksi.`)) return;
    try {
        await apiCall('guide_category_delete', 'POST', { id });
        guideCategories = await apiCall('guide_categories');
        renderGuideCatList();
        populateGuideCategoryFilter();
    } catch (e) { alert(e.message); }
}

// ==================== TEHTÄVÄT (TODO) ====================

let todosData = [];
let currentTodoId = null;
let currentTodoSubTab = 'tasks';

function createTodoFromTicket(ticket) {
    // Vaihda todo-välilehdelle ja avaa uusi tehtävälomake esitäytetyillä tiedoilla
    switchToTab('todo');
    switchTodoSubTab('tasks');
    // Pieni viive jotta tab ehtii renderöityä
    setTimeout(async () => {
        await openTaskEdit(null);
        const num = ticket.ticket_number ? `#${ticket.ticket_number} ` : '';
        document.getElementById('task-form-title').value = num + (ticket.subject || '');
        // Mapataan tiketin tyyppi tehtävän kategoriaan
        const catMap = { tekniikka: 'tekniikka', laskutus: 'laskutus', vika: 'tekniikka', muu: 'muu' };
        document.getElementById('task-form-category').value = catMap[ticket.type] || '';
        // Mapataan prioriteetti
        const prioMap = { urgent: 'kiireellinen', 'tärkeä': 'tarkea', normaali: 'normaali' };
        document.getElementById('task-form-priority').value = prioMap[ticket.priority] || 'normaali';
        // Kuvaus: lähettäjä + lyhyt viite
        const desc = `Tiketti${num ? ' ' + num : ''}: ${ticket.subject || ''}\nLähettäjä: ${ticket.from_name || ''} <${ticket.from_email || ''}>`;
        document.getElementById('task-form-desc').value = desc;
    }, 100);
}

const todoStatusLabels = { avoin:'Avoin', kaynnissa:'Käynnissä', odottaa:'Odottaa', valmis:'Valmis', ehdotettu:'Ehdotettu', harkinnassa:'Harkinnassa', toteutettu:'Toteutettu', hylatty:'Hylätty' };
const todoPriorityLabels = { normaali:'Normaali', tarkea:'Tärkeä', kiireellinen:'Kiireellinen' };
const todoCategoryLabels = { tekniikka:'Tekniikka', laskutus:'Laskutus', myynti:'Myynti', asennus:'Asennus', muu:'Muu' };

function switchTodoSubTab(target) {
    currentTodoSubTab = target;
    document.querySelectorAll('[data-todotab]').forEach(b => {
        b.classList.toggle('active', b.dataset.todotab === target);
        b.style.borderBottomColor = b.dataset.todotab === target ? 'var(--primary-color)' : 'transparent';
        b.style.color = b.dataset.todotab === target ? 'var(--primary-color)' : '#888';
    });
    document.getElementById('todo-subtab-tasks').style.display = target === 'tasks' ? '' : 'none';
    document.getElementById('todo-subtab-features').style.display = target === 'features' ? '' : 'none';
    // Palauta listanäkymään kun vaihdetaan tabia
    if (target === 'tasks') showTaskListView();
    if (target === 'features') showFeatureListView();
    window.location.hash = 'todo/' + target;
}

async function loadTodos() {
    try {
        todosData = await apiCall('todos');
        renderTasksList();
        renderFeaturesList();
        populateTodoAssignedFilter();
        const isAdmin = currentUser?.role === 'admin' || currentUser?.role === 'superadmin';
        const btnTask = document.getElementById('btn-add-task');
        if (btnTask) btnTask.style.display = isAdmin ? '' : 'none';
    } catch (e) { console.error('loadTodos:', e); }
}

function populateTodoAssignedFilter() {
    const sel = document.getElementById('todo-assigned-filter');
    if (!sel) return;
    const users = [...new Set(todosData.filter(t => t.assigned_to).map(t => t.assigned_to))].sort();
    sel.innerHTML = '<option value="">Kaikki vastuuhenkilöt</option>' + users.map(u => `<option value="${esc(u)}">${esc(u)}</option>`).join('');
}

// ---- Osatehtävät (subtaskit) ----

function renderSubtasks(subtasks, todoId) {
    const list = document.getElementById('task-subtasks-list');
    const countEl = document.getElementById('task-subtask-count');
    if (!list) return;
    const done = subtasks.filter(s => s.completed).length;
    const total = subtasks.length;
    if (countEl) countEl.textContent = total > 0 ? `(${done}/${total})` : '';
    list.innerHTML = subtasks.length ? subtasks.map(s => `<div class="subtask-item${s.completed ? ' completed' : ''}">
        <label><input type="checkbox" ${s.completed ? 'checked' : ''} onchange="toggleSubtask('${s.id}','${todoId}')"> <span>${esc(s.title)}</span></label>
        <button class="subtask-delete" onclick="deleteSubtask('${s.id}','${todoId}')" title="Poista">&times;</button>
    </div>`).join('') : '<div style="color:#aaa;font-size:0.85rem;">Ei osatehtäviä</div>';
}

async function addSubtask(todoId) {
    const input = document.getElementById('subtask-input');
    const title = (input?.value || '').trim();
    if (!title) return;
    try {
        await apiCall('todo_subtask_add', 'POST', { todo_id: todoId, title });
        input.value = '';
        await openTaskRead(todoId);
    } catch (e) { alert(e.message); }
}

async function toggleSubtask(subtaskId, todoId) {
    try {
        await apiCall('todo_subtask_toggle', 'POST', { id: subtaskId });
        await openTaskRead(todoId);
        await loadTodos();
    } catch (e) { alert(e.message); }
}

async function deleteSubtask(subtaskId, todoId) {
    try {
        await apiCall('todo_subtask_delete', 'POST', { id: subtaskId });
        await openTaskRead(todoId);
        await loadTodos();
    } catch (e) { alert(e.message); }
}

// ---- Tehtävät ----

function renderTasksList() {
    const query = (document.getElementById('todo-search-input')?.value || '').toLowerCase().trim();
    const statusF = document.getElementById('todo-status-filter')?.value || '';
    const assignF = document.getElementById('todo-assigned-filter')?.value || '';
    const catF = document.getElementById('todo-category-filter')?.value || '';
    let tasks = todosData.filter(t => t.type === 'task');
    if (query) tasks = tasks.filter(t => (t.title||'').toLowerCase().includes(query) || (t.description||'').toLowerCase().includes(query) || (t.assigned_to||'').toLowerCase().includes(query));
    if (statusF) tasks = tasks.filter(t => t.status === statusF);
    if (assignF) tasks = tasks.filter(t => t.assigned_to === assignF);
    if (catF) tasks = tasks.filter(t => t.category === catF);

    // Lajittelu: deadline lähimmät ensin (null-deadlinet loppuun), sitten prioriteetti
    const today = new Date().toISOString().slice(0,10);
    const prioOrder = { kiireellinen: 0, tarkea: 1, normaali: 2 };
    const statusOrder = { avoin: 0, kaynnissa: 1, odottaa: 2, valmis: 3 };
    tasks.sort((a, b) => {
        // Valmiit aina loppuun
        if ((a.status === 'valmis') !== (b.status === 'valmis')) return a.status === 'valmis' ? 1 : -1;
        // Deadline: lähimmät ensin, null loppuun
        const da = a.deadline || '9999-99-99';
        const db = b.deadline || '9999-99-99';
        if (da !== db) return da.localeCompare(db);
        // Prioriteetti
        const pa = prioOrder[a.priority] ?? 2;
        const pb = prioOrder[b.priority] ?? 2;
        if (pa !== pb) return pa - pb;
        return 0;
    });

    const tbody = document.getElementById('tasks-tbody');
    const table = document.getElementById('tasks-table');
    const noEl = document.getElementById('no-tasks');
    if (!tbody) return;
    if (!tasks.length) { tbody.innerHTML = ''; table.style.display = 'none'; if (noEl) noEl.style.display = ''; return; }
    if (noEl) noEl.style.display = 'none';
    table.style.display = 'table';
    tbody.innerHTML = tasks.map(t => {
        const overdue = t.deadline && t.status !== 'valmis' && t.deadline < today;
        const soon = t.deadline && t.status !== 'valmis' && !overdue && t.deadline <= new Date(Date.now()+3*86400000).toISOString().slice(0,10);
        const rowClass = overdue ? 'todo-row-overdue' : (soon ? 'todo-row-soon' : (t.status === 'kaynnissa' ? 'todo-row-active' : (t.status === 'valmis' ? 'todo-row-done' : '')));
        return `<tr class="${rowClass}" onclick="openTaskRead('${t.id}')" style="cursor:pointer;">
            <td class="nowrap">${t.deadline ? `<span${overdue ? ' style="color:#e74c3c;font-weight:600;"' : (soon ? ' style="color:#f39c12;font-weight:600;"' : '')}>${t.deadline}</span>` : '<span style="color:#ccc;">—</span>'}</td>
            <td><span class="todo-status status-${t.status}">${todoStatusLabels[t.status]||t.status}</span></td>
            <td><span class="priority-badge priority-${t.priority}">${todoPriorityLabels[t.priority]||t.priority}</span></td>
            <td>${t.category ? `<span class="todo-category cat-${t.category}">${todoCategoryLabels[t.category]||t.category}</span>` : '<span style="color:#ccc;">—</span>'}</td>
            <td><strong>${esc(t.title)}</strong>${t.subtask_count > 0 ? ` <span class="subtask-progress">&#9745; ${t.subtask_done}/${t.subtask_count}</span>` : ''}</td>
            <td>${t.assigned_to ? esc(t.assigned_to) : '<span style="color:#ccc;">—</span>'}</td>
            <td style="text-align:center;">${t.total_hours > 0 ? t.total_hours + 'h' : '<span style="color:#ccc;">—</span>'}</td>
            <td style="text-align:center;">${t.comment_count > 0 ? t.comment_count : ''}</td>
        </tr>`;
    }).join('');
}

function showTaskListView() {
    document.getElementById('tasks-list-view').style.display = '';
    document.getElementById('task-read-view').style.display = 'none';
    document.getElementById('task-edit-view').style.display = 'none';
}

async function openTaskRead(id) {
    currentTodoId = id;
    try {
        const t = await apiCall('todo_detail&id=' + id);
        const isAdmin = currentUser?.role === 'admin' || currentUser?.role === 'superadmin';
        document.getElementById('task-read-title').textContent = t.title;
        document.getElementById('task-read-meta').innerHTML = `Luoja: ${esc(t.created_by)} &nbsp;|&nbsp; Luotu: ${(t.luotu||'').slice(0,10)} ${t.muokattu ? '&nbsp;|&nbsp; Muokattu: ' + t.muokattu.slice(0,10) : ''}`;
        document.getElementById('task-read-badges').innerHTML = `
            <span class="priority-badge priority-${t.priority}">${todoPriorityLabels[t.priority]||t.priority}</span>
            <span class="todo-status status-${t.status}">${todoStatusLabels[t.status]||t.status}</span>`;
        document.getElementById('task-read-fields').innerHTML = `
            <div><strong style="font-size:0.78rem;color:#888;">Status</strong><br>${isAdmin ? `<select onchange="updateTaskField('${t.id}','status',this.value)" style="font-size:0.88rem;padding:0.25rem 0.5rem;border-radius:6px;border:1px solid #ddd;">
                <option value="avoin" ${t.status==='avoin'?'selected':''}>Avoin</option><option value="kaynnissa" ${t.status==='kaynnissa'?'selected':''}>Käynnissä</option><option value="odottaa" ${t.status==='odottaa'?'selected':''}>Odottaa</option><option value="valmis" ${t.status==='valmis'?'selected':''}>Valmis</option>
            </select>` : (todoStatusLabels[t.status]||t.status)}</div>
            <div><strong style="font-size:0.78rem;color:#888;">Vastuuhenkilö</strong><br>${isAdmin ? `<select onchange="updateTaskField('${t.id}','assigned',this.value)" style="font-size:0.88rem;padding:0.25rem 0.5rem;border-radius:6px;border:1px solid #ddd;" id="task-read-assigned-sel">
                <option value="">— Ei —</option>
            </select>` : esc(t.assigned_to || '—')}</div>
            <div><strong style="font-size:0.78rem;color:#888;">Prioriteetti</strong><br>${todoPriorityLabels[t.priority]||t.priority}</div>
            <div><strong style="font-size:0.78rem;color:#888;">Tyyppi</strong><br>${t.category ? (todoCategoryLabels[t.category]||t.category) : '—'}</div>
            <div><strong style="font-size:0.78rem;color:#888;">Deadline</strong><br>${t.deadline || '—'}</div>`;
        // Populoi vastuuhenkilö-dropdown
        if (isAdmin) {
            try {
                const users = await apiCall('users');
                const sel = document.getElementById('task-read-assigned-sel');
                if (sel) { users.forEach(u => { const o = document.createElement('option'); o.value = u.username; o.textContent = u.nimi || u.username; if (u.username === t.assigned_to) o.selected = true; sel.appendChild(o); }); }
            } catch(e) {}
        }
        document.getElementById('task-read-description').textContent = t.description || '(Ei kuvausta)';
        // Aikakirjaukset
        const entries = t.time_entries || [];
        document.getElementById('task-time-total').textContent = `(yhteensä: ${t.total_hours || 0}h)`;
        document.getElementById('task-time-tbody').innerHTML = entries.length ? entries.map(e => `<tr>
            <td>${e.work_date}</td><td>${esc(e.user)}</td><td>${e.hours}h</td><td>${esc(e.description||'')}</td>
            <td>${(e.user === currentUser?.username || isAdmin) ? `<button onclick="deleteTimeEntry('${e.id}','${t.id}')" style="background:none;border:none;cursor:pointer;color:#ccc;font-size:1rem;" title="Poista">&#128465;</button>` : ''}</td>
        </tr>`).join('') : '<tr><td colspan="5" style="color:#aaa;text-align:center;">Ei kirjauksia</td></tr>';
        // Osatehtävät
        renderSubtasks(t.subtasks || [], t.id);
        document.getElementById('btn-add-subtask')?.replaceWith(document.getElementById('btn-add-subtask')?.cloneNode(true));
        document.getElementById('btn-add-subtask')?.addEventListener('click', () => addSubtask(t.id));
        document.getElementById('subtask-input')?.addEventListener('keydown', (e) => { if (e.key === 'Enter') { e.preventDefault(); addSubtask(t.id); } });
        // Kommentit
        renderTodoComments(t.comments || [], 'task');
        document.getElementById('task-comment-count').textContent = `(${(t.comments||[]).length})`;
        // Actionit
        document.getElementById('task-read-actions').innerHTML = isAdmin ? `<button class="btn-secondary" onclick="openTaskEdit('${t.id}')">&#9998; Muokkaa</button><button class="btn-secondary" onclick="deleteTodo('${t.id}')" style="color:#e74c3c;">&#128465; Poista</button>` : '';
        // Aikakirjaus-lomake valmistelu
        document.getElementById('time-form-date').value = new Date().toISOString().slice(0,10);
        document.getElementById('time-form-hours').value = '';
        document.getElementById('time-form-desc').value = '';
        document.getElementById('task-time-form').style.display = 'none';
        document.getElementById('tasks-list-view').style.display = 'none';
        document.getElementById('task-edit-view').style.display = 'none';
        document.getElementById('task-read-view').style.display = '';
    } catch (e) { alert('Virhe: ' + e.message); }
}

async function updateTaskField(id, field, value) {
    try {
        if (field === 'status') await apiCall('todo_status', 'POST', { id, status: value });
        if (field === 'assigned') await apiCall('todo_assign', 'POST', { id, assigned_to: value });
        await loadTodos();
        // Päivitä lukunäkymä jos auki
        const taskReadView = document.getElementById('task-read-view');
        const featureReadView = document.getElementById('feature-read-view');
        if (taskReadView && taskReadView.style.display !== 'none') {
            await openTaskRead(id);
        } else if (featureReadView && featureReadView.style.display !== 'none') {
            await openFeatureRead(id);
        }
    } catch (e) { alert(e.message); }
}

async function openTaskEdit(id) {
    const t = id ? todosData.find(x => x.id === id) : null;
    currentTodoId = t?.id || null;
    document.getElementById('task-form-id').value = t?.id || '';
    document.getElementById('task-form-type').value = 'task';
    document.getElementById('task-form-title').value = t?.title || '';
    document.getElementById('task-form-priority').value = t?.priority || 'normaali';
    document.getElementById('task-form-status').value = t?.status || 'avoin';
    document.getElementById('task-form-category').value = t?.category || '';
    document.getElementById('task-form-deadline').value = t?.deadline || '';
    document.getElementById('task-form-desc').value = t?.description || '';
    document.getElementById('task-edit-title').textContent = t ? 'Muokkaa tehtävää' : 'Uusi tehtävä';
    // Populoi vastuuhenkilö-dropdown
    const asel = document.getElementById('task-form-assigned');
    asel.innerHTML = '<option value="">— Ei vastuuhenkilöä —</option>';
    try {
        const users = await apiCall('users');
        users.forEach(u => {
            const o = document.createElement('option');
            o.value = u.username; o.textContent = u.nimi || u.username;
            if (t && u.username === t.assigned_to) o.selected = true;
            asel.appendChild(o);
        });
    } catch(e) {}
    document.getElementById('tasks-list-view').style.display = 'none';
    document.getElementById('task-read-view').style.display = 'none';
    document.getElementById('task-edit-view').style.display = '';
}

document.getElementById('task-form')?.addEventListener('submit', async (e) => {
    e.preventDefault();
    const id = document.getElementById('task-form-id').value;
    const existing = id ? todosData.find(t => t.id === id) : null;
    const body = {
        id: id || undefined,
        type: 'task',
        title: document.getElementById('task-form-title').value.trim(),
        description: document.getElementById('task-form-desc').value.trim(),
        priority: document.getElementById('task-form-priority').value,
        category: document.getElementById('task-form-category').value,
        status: document.getElementById('task-form-status').value,
        deadline: document.getElementById('task-form-deadline').value || null,
        assigned_to: document.getElementById('task-form-assigned').value,
        created_by: existing?.created_by,
        luotu: existing?.luotu,
    };
    if (!body.title) return;
    try {
        const saved = await apiCall('todo_save', 'POST', body);
        await loadTodos();
        openTaskRead(saved.id);
    } catch (e) { alert(e.message); }
});

// ---- Kehitysehdotukset ----

function renderFeaturesList() {
    const query = (document.getElementById('feature-search-input')?.value || '').toLowerCase().trim();
    const statusF = document.getElementById('feature-status-filter')?.value || '';
    let features = todosData.filter(t => t.type === 'feature_request');
    if (query) features = features.filter(t => (t.title||'').toLowerCase().includes(query) || (t.description||'').toLowerCase().includes(query));
    if (statusF) features = features.filter(t => t.status === statusF);

    // Lajittelu: uusimmat ensin, toteutetut/hylätyt loppuun
    features.sort((a, b) => {
        const doneA = (a.status === 'toteutettu' || a.status === 'hylatty') ? 1 : 0;
        const doneB = (b.status === 'toteutettu' || b.status === 'hylatty') ? 1 : 0;
        if (doneA !== doneB) return doneA - doneB;
        return (b.luotu || '').localeCompare(a.luotu || '');
    });

    const tbody = document.getElementById('features-tbody');
    const table = document.getElementById('features-table');
    const noEl = document.getElementById('no-features');
    if (!tbody) return;
    if (!features.length) { tbody.innerHTML = ''; table.style.display = 'none'; if (noEl) noEl.style.display = ''; return; }
    if (noEl) noEl.style.display = 'none';
    table.style.display = 'table';
    tbody.innerHTML = features.map(t => {
        const done = t.status === 'toteutettu' || t.status === 'hylatty';
        const rowClass = done ? 'todo-row-done' : '';
        return `<tr class="${rowClass}" onclick="openFeatureRead('${t.id}')" style="cursor:pointer;">
            <td class="nowrap">${(t.luotu||'').slice(0,10)}</td>
            <td><span class="todo-status status-${t.status}">${todoStatusLabels[t.status]||t.status}</span></td>
            <td><strong>${esc(t.title)}</strong></td>
            <td>${esc(t.created_by)}</td>
            <td style="text-align:center;">${t.comment_count > 0 ? t.comment_count : ''}</td>
        </tr>`;
    }).join('');
}

function showFeatureListView() {
    document.getElementById('features-list-view').style.display = '';
    document.getElementById('feature-read-view').style.display = 'none';
    document.getElementById('feature-edit-view').style.display = 'none';
}

async function openFeatureRead(id) {
    currentTodoId = id;
    try {
        const t = await apiCall('todo_detail&id=' + id);
        const isAdmin = currentUser?.role === 'admin' || currentUser?.role === 'superadmin';
        const isOwner = t.created_by === currentUser?.username;
        document.getElementById('feature-read-title').textContent = t.title;
        document.getElementById('feature-read-meta').innerHTML = `Ehdottaja: ${esc(t.created_by)} &nbsp;|&nbsp; ${(t.luotu||'').slice(0,10)}`;
        document.getElementById('feature-read-badges').innerHTML = isAdmin
            ? `<select onchange="updateTaskField('${t.id}','status',this.value)" style="font-size:0.88rem;padding:0.3rem 0.6rem;border-radius:6px;border:1px solid #ddd;">
                <option value="ehdotettu" ${t.status==='ehdotettu'?'selected':''}>Ehdotettu</option><option value="harkinnassa" ${t.status==='harkinnassa'?'selected':''}>Harkinnassa</option><option value="toteutettu" ${t.status==='toteutettu'?'selected':''}>Toteutettu</option><option value="hylatty" ${t.status==='hylatty'?'selected':''}>Hylätty</option>
            </select>`
            : `<span class="todo-status status-${t.status}">${todoStatusLabels[t.status]||t.status}</span>`;
        document.getElementById('feature-read-description').textContent = t.description || '(Ei kuvausta)';
        renderTodoComments(t.comments || [], 'feature');
        document.getElementById('feature-comment-count').textContent = `(${(t.comments||[]).length})`;
        document.getElementById('feature-read-actions').innerHTML = (isAdmin || isOwner)
            ? `<button class="btn-secondary" onclick="openFeatureEdit('${t.id}')">&#9998; Muokkaa</button>${isAdmin ? `<button class="btn-secondary" onclick="deleteTodo('${t.id}')" style="color:#e74c3c;">&#128465; Poista</button>` : ''}`
            : '';
        document.getElementById('features-list-view').style.display = 'none';
        document.getElementById('feature-edit-view').style.display = 'none';
        document.getElementById('feature-read-view').style.display = '';
    } catch (e) { alert('Virhe: ' + e.message); }
}

async function openFeatureEdit(id) {
    const t = id ? todosData.find(x => x.id === id) : null;
    currentTodoId = t?.id || null;
    document.getElementById('feature-form-id').value = t?.id || '';
    document.getElementById('feature-form-type').value = 'feature_request';
    document.getElementById('feature-form-title').value = t?.title || '';
    document.getElementById('feature-form-desc').value = t?.description || '';
    document.getElementById('feature-edit-title').textContent = t ? 'Muokkaa ehdotusta' : 'Uusi kehitysehdotus';
    document.getElementById('features-list-view').style.display = 'none';
    document.getElementById('feature-read-view').style.display = 'none';
    document.getElementById('feature-edit-view').style.display = '';
}

document.getElementById('feature-form')?.addEventListener('submit', async (e) => {
    e.preventDefault();
    const id = document.getElementById('feature-form-id').value;
    const existing = id ? todosData.find(t => t.id === id) : null;
    const body = {
        id: id || undefined,
        type: 'feature_request',
        title: document.getElementById('feature-form-title').value.trim(),
        description: document.getElementById('feature-form-desc').value.trim(),
        status: existing?.status || 'ehdotettu',
        priority: 'normaali',
        created_by: existing?.created_by,
        luotu: existing?.luotu,
    };
    if (!body.title) return;
    try {
        const saved = await apiCall('todo_save', 'POST', body);
        await loadTodos();
        openFeatureRead(saved.id);
    } catch (e) { alert(e.message); }
});

// ---- Yhteiset funktiot ----

function renderTodoComments(comments, prefix) {
    const list = document.getElementById(prefix + '-comments-list');
    if (!list) return;
    const isAdmin = currentUser?.role === 'admin' || currentUser?.role === 'superadmin';
    list.innerHTML = comments.length ? comments.map(c => `<div class="todo-comment">
        <div class="todo-comment-meta">${esc(c.author)} &nbsp;·&nbsp; ${(c.luotu||'').replace('T',' ').slice(0,16)}</div>
        <div style="white-space:pre-wrap;">${esc(c.body)}</div>
        ${(c.author === currentUser?.username || isAdmin) ? `<button onclick="deleteTodoComment('${c.id}')" style="background:none;border:none;color:#ccc;cursor:pointer;font-size:0.78rem;margin-top:0.25rem;">Poista</button>` : ''}
    </div>`).join('') : '<p style="color:#aaa;font-size:0.88rem;">Ei kommentteja vielä.</p>';
}

async function sendTodoComment(prefix) {
    const input = document.getElementById(prefix + '-comment-input');
    const body = input?.value.trim();
    if (!body || !currentTodoId) return;
    try {
        await apiCall('todo_comment', 'POST', { todo_id: currentTodoId, body });
        input.value = '';
        if (prefix === 'task') await openTaskRead(currentTodoId);
        else await openFeatureRead(currentTodoId);
    } catch (e) { alert(e.message); }
}

async function deleteTodoComment(commentId) {
    if (!confirm('Poistetaanko kommentti?')) return;
    try {
        await apiCall('todo_comment_delete', 'POST', { id: commentId });
        if (currentTodoSubTab === 'tasks') await openTaskRead(currentTodoId);
        else await openFeatureRead(currentTodoId);
    } catch (e) { alert(e.message); }
}

async function deleteTodo(id) {
    if (!confirm('Poistetaanko pysyvästi?')) return;
    try {
        await apiCall('todo_delete', 'POST', { id });
        await loadTodos();
        if (currentTodoSubTab === 'tasks') showTaskListView();
        else showFeatureListView();
    } catch (e) { alert(e.message); }
}

async function addTimeEntry() {
    if (!currentTodoId) return;
    const hours = parseFloat(document.getElementById('time-form-hours').value);
    const desc = document.getElementById('time-form-desc').value.trim();
    const date = document.getElementById('time-form-date').value;
    if (!hours || hours <= 0) { alert('Syötä tunnit'); return; }
    try {
        await apiCall('todo_time_add', 'POST', { todo_id: currentTodoId, hours, description: desc, work_date: date });
        await loadTodos();
        await openTaskRead(currentTodoId);
    } catch (e) { alert(e.message); }
}

async function deleteTimeEntry(entryId, todoId) {
    if (!confirm('Poistetaanko aikakirjaus?')) return;
    try {
        await apiCall('todo_time_delete', 'POST', { id: entryId });
        await loadTodos();
        await openTaskRead(todoId);
    } catch (e) { alert(e.message); }
}

// Event listeners
document.getElementById('todo-search-input')?.addEventListener('input', () => renderTasksList());
document.getElementById('todo-status-filter')?.addEventListener('change', () => renderTasksList());
document.getElementById('todo-assigned-filter')?.addEventListener('change', () => renderTasksList());
document.getElementById('todo-category-filter')?.addEventListener('change', () => renderTasksList());
document.getElementById('feature-search-input')?.addEventListener('input', () => renderFeaturesList());
document.getElementById('feature-status-filter')?.addEventListener('change', () => renderFeaturesList());
document.getElementById('btn-add-task')?.addEventListener('click', () => openTaskEdit(null));
document.getElementById('btn-add-feature')?.addEventListener('click', () => openFeatureEdit(null));
document.getElementById('btn-task-back')?.addEventListener('click', () => { showTaskListView(); currentTodoId = null; });
document.getElementById('btn-feature-back')?.addEventListener('click', () => { showFeatureListView(); currentTodoId = null; });
document.getElementById('btn-task-edit-cancel')?.addEventListener('click', () => showTaskListView());
document.getElementById('task-form-cancel')?.addEventListener('click', () => showTaskListView());
document.getElementById('btn-feature-edit-cancel')?.addEventListener('click', () => showFeatureListView());
document.getElementById('feature-form-cancel')?.addEventListener('click', () => showFeatureListView());
document.getElementById('btn-task-comment-send')?.addEventListener('click', () => sendTodoComment('task'));
document.getElementById('btn-feature-comment-send')?.addEventListener('click', () => sendTodoComment('feature'));
document.getElementById('btn-add-time')?.addEventListener('click', () => {
    document.getElementById('task-time-form').style.display = 'flex';
    document.getElementById('btn-add-time').style.display = 'none';
});
document.getElementById('btn-time-cancel')?.addEventListener('click', () => {
    document.getElementById('task-time-form').style.display = 'none';
    document.getElementById('btn-add-time').style.display = '';
});
document.getElementById('btn-time-save')?.addEventListener('click', () => addTimeEntry());

// ==================== NETADMIN ====================

let netadminData = { connections: [], devices: [] };

async function loadNetadmin() {
    try {
        netadminData = await apiCall('netadmin_connections');
        populateNetadminFilters();
        renderNetadminTable();
    } catch (e) { console.error('NetAdmin lataus epäonnistui:', e); }
}

function populateNetadminFilters() {
    const conns = netadminData.connections || [];

    // Kaupungit
    const cities = [...new Set(conns.map(c => c.kaupunki).filter(Boolean))].sort();
    const citySel = document.getElementById('netadmin-filter-city');
    const cityVal = citySel.value;
    citySel.innerHTML = '<option value="">Kaikki kaupungit</option>' +
        cities.map(c => `<option value="${c}">${esc(c)}</option>`).join('');
    citySel.value = cityVal;

    // Nopeudet
    const speeds = [...new Set(conns.map(c => c.liittymanopeus).filter(Boolean))].sort();
    const speedSel = document.getElementById('netadmin-filter-speed');
    const speedVal = speedSel.value;
    speedSel.innerHTML = '<option value="">Kaikki nopeudet</option>' +
        speeds.map(s => `<option value="${s}">${esc(s)}</option>`).join('');
    speedSel.value = speedVal;

    // Laitteet
    const devs = [...new Set(conns.map(c => c.laite).filter(Boolean))].sort();
    const devSel = document.getElementById('netadmin-filter-device');
    const devVal = devSel.value;
    devSel.innerHTML = '<option value="">Kaikki laitteet</option>' +
        devs.map(d => `<option value="${d}">${esc(d)}</option>`).join('');
    devSel.value = devVal;
}

function renderNetadminTable() {
    const query = (document.getElementById('netadmin-search')?.value || '').toLowerCase().trim();
    const filterCity = document.getElementById('netadmin-filter-city')?.value || '';
    const filterSpeed = document.getElementById('netadmin-filter-speed')?.value || '';
    const filterDevice = document.getElementById('netadmin-filter-device')?.value || '';

    let filtered = netadminData.connections || [];

    if (query) {
        filtered = filtered.filter(c => {
            const searchStr = [
                c.customer_name, c.asennusosoite, c.kaupunki, c.postinumero,
                c.liittymanopeus, c.vlan, c.laite, c.portti, c.ip
            ].filter(Boolean).join(' ').toLowerCase();
            return searchStr.includes(query);
        });
    }
    if (filterCity) filtered = filtered.filter(c => c.kaupunki === filterCity);
    if (filterSpeed) filtered = filtered.filter(c => c.liittymanopeus === filterSpeed);
    if (filterDevice) filtered = filtered.filter(c => c.laite === filterDevice);

    const tbody = document.getElementById('netadmin-tbody');
    const noEl = document.getElementById('no-netadmin');
    const countEl = document.getElementById('netadmin-count');

    countEl.textContent = `${filtered.length} / ${(netadminData.connections || []).length} liittymää`;

    if (filtered.length === 0) {
        tbody.innerHTML = '';
        noEl.style.display = '';
        return;
    }
    noEl.style.display = 'none';

    tbody.innerHTML = filtered.map(c => {
        const addr = c.asennusosoite || '-';
        const deviceInfo = c.device_info;
        const pingClass = deviceInfo?.ping_status === 'up' ? 'netadmin-status-up' :
                          deviceInfo?.ping_status === 'down' ? 'netadmin-status-down' : '';
        const deviceDisplay = c.laite ? `<span class="${pingClass}">${esc(c.laite)}</span>` : '-';

        return `<tr onclick="editCustomer('${c.customer_id}')" style="cursor:pointer;" title="Avaa asiakas">
            <td><strong>${esc(c.customer_name || '-')}</strong></td>
            <td>${esc(addr)}</td>
            <td>${esc(c.kaupunki || '-')}</td>
            <td><span class="netadmin-speed">${esc(c.liittymanopeus || '-')}</span></td>
            <td>${esc(c.vlan || '-')}</td>
            <td>${deviceDisplay}</td>
            <td>${esc(c.portti || '-')}</td>
            <td><code>${esc(c.ip || '-')}</code></td>
        </tr>`;
    }).join('');
}

document.getElementById('netadmin-search')?.addEventListener('input', renderNetadminTable);
document.getElementById('netadmin-filter-city')?.addEventListener('change', renderNetadminTable);
document.getElementById('netadmin-filter-speed')?.addEventListener('change', renderNetadminTable);
document.getElementById('netadmin-filter-device')?.addEventListener('change', renderNetadminTable);

// ==================== DOKUMENTIT ====================

let allDocuments = [];
let currentDocument = null;

const docCategoryLabels = {
    sopimus: 'Sopimus',
    lasku: 'Lasku',
    ohje: 'Ohje',
    raportti: 'Raportti',
    muu: 'Muu'
};

function showDocsListView() {
    document.getElementById('docs-list-view').style.display = '';
    document.getElementById('doc-read-view').style.display = 'none';
    document.getElementById('doc-edit-view').style.display = 'none';
}

function showDocReadView() {
    document.getElementById('docs-list-view').style.display = 'none';
    document.getElementById('doc-read-view').style.display = '';
    document.getElementById('doc-edit-view').style.display = 'none';
}

function showDocEditView() {
    document.getElementById('docs-list-view').style.display = 'none';
    document.getElementById('doc-read-view').style.display = 'none';
    document.getElementById('doc-edit-view').style.display = '';
}

async function loadDocuments() {
    try {
        allDocuments = await apiCall('documents');
        populateDocCustomerFilter();
        renderDocumentsList();
    } catch (e) { console.error('Dokumenttien lataus epäonnistui:', e); }
}

function populateDocCustomerFilter() {
    const sel = document.getElementById('doc-filter-customer');
    const existing = sel.value;
    // Kerää uniikki lista asiakkaista
    const customerMap = {};
    allDocuments.forEach(d => {
        if (d.customer_id) {
            customerMap[d.customer_id] = d.customer_id; // käytetään myöhemmin nimeä jos saatavilla
        }
    });
    // Käytä customers-listaa nimien näyttämiseen
    sel.innerHTML = '<option value="">Kaikki asiakkaat</option>';
    if (typeof customers !== 'undefined' && customers.length > 0) {
        customers.forEach(c => {
            sel.innerHTML += `<option value="${c.id}">${esc(c.yritys)}</option>`;
        });
    } else {
        Object.keys(customerMap).forEach(id => {
            sel.innerHTML += `<option value="${id}">${id}</option>`;
        });
    }
    sel.value = existing || '';
}

function renderDocumentsList() {
    const query = (document.getElementById('doc-search')?.value || '').toLowerCase().trim();
    const filterCustomer = document.getElementById('doc-filter-customer')?.value || '';
    const filterCategory = document.getElementById('doc-filter-category')?.value || '';

    let filtered = allDocuments;
    if (query) {
        filtered = filtered.filter(d =>
            (d.title || '').toLowerCase().includes(query) ||
            (d.description || '').toLowerCase().includes(query)
        );
    }
    if (filterCustomer) {
        filtered = filtered.filter(d => d.customer_id === filterCustomer);
    }
    if (filterCategory) {
        filtered = filtered.filter(d => d.category === filterCategory);
    }

    const tbody = document.getElementById('docs-tbody');
    const noDocsEl = document.getElementById('no-docs');

    if (filtered.length === 0) {
        tbody.innerHTML = '';
        noDocsEl.style.display = '';
        return;
    }
    noDocsEl.style.display = 'none';

    // Hae asiakasnimien map
    const customerNameMap = {};
    if (typeof customers !== 'undefined') {
        customers.forEach(c => { customerNameMap[c.id] = c.yritys; });
    }

    tbody.innerHTML = filtered.map(d => {
        const customerName = d.customer_id ? (customerNameMap[d.customer_id] || d.customer_id) : '<span style="color:#aaa;">Yleinen</span>';
        const catLabel = docCategoryLabels[d.category] || d.category || '-';
        const version = d.current_version || 0;
        const date = d.muokattu ? new Date(d.muokattu).toLocaleDateString('fi-FI') : '-';
        const author = d.version_author || d.created_by || '-';
        return `<tr onclick="openDocRead('${d.id}')" style="cursor:pointer;">
            <td><strong>${esc(d.title)}</strong></td>
            <td>${customerName}</td>
            <td><span class="doc-category cat-${d.category || 'muu'}">${catLabel}</span></td>
            <td style="text-align:center;">v${version}</td>
            <td>${date}</td>
            <td>${esc(author)}</td>
        </tr>`;
    }).join('');
}

document.getElementById('doc-search')?.addEventListener('input', renderDocumentsList);
document.getElementById('doc-filter-customer')?.addEventListener('change', renderDocumentsList);
document.getElementById('doc-filter-category')?.addEventListener('change', renderDocumentsList);

async function openDocRead(docId) {
    try {
        currentDocument = await apiCall(`document&id=${docId}`);
        renderDocReadView();
        showDocReadView();
    } catch (e) { alert('Dokumentin avaus epäonnistui: ' + e.message); }
}

function renderDocReadView() {
    const d = currentDocument;
    if (!d) return;

    // Asiakasnimen haku
    let customerName = 'Ei asiakasta (yleinen)';
    if (d.customer_id && typeof customers !== 'undefined') {
        const c = customers.find(c => c.id === d.customer_id);
        if (c) customerName = c.yritys;
    }

    document.getElementById('doc-read-title').textContent = d.title || '';
    document.getElementById('doc-read-customer').textContent = '👤 ' + customerName;
    document.getElementById('doc-read-category').innerHTML = `<span class="doc-category cat-${d.category || 'muu'}">${docCategoryLabels[d.category] || d.category || 'Muu'}</span>`;
    document.getElementById('doc-read-version').textContent = `📌 Versio ${d.current_version || 0}`;
    document.getElementById('doc-read-date').textContent = d.muokattu ? '📅 ' + new Date(d.muokattu).toLocaleDateString('fi-FI') : '';
    document.getElementById('doc-read-description').textContent = d.description || '';

    // Admin-napit
    const isAdmin = currentUser?.role === 'admin' || currentUser?.role === 'superadmin';
    document.getElementById('btn-doc-delete').style.display = isAdmin ? '' : 'none';

    // Latausnappi - piilota jos ei versioita
    document.getElementById('btn-doc-download').style.display = (d.current_version && d.current_version > 0) ? '' : 'none';

    // Versiohistoria
    const vtbody = document.getElementById('doc-versions-tbody');
    if (!d.versions || d.versions.length === 0) {
        vtbody.innerHTML = '<tr><td colspan="6" style="text-align:center;color:#aaa;padding:1rem;">Ei versioita vielä.</td></tr>';
    } else {
        vtbody.innerHTML = d.versions.map(v => {
            const date = v.luotu ? new Date(v.luotu).toLocaleDateString('fi-FI', { day: '2-digit', month: '2-digit', year: 'numeric', hour: '2-digit', minute: '2-digit' }) : '-';
            const isCurrent = v.version_number === d.current_version;
            return `<tr${isCurrent ? ' style="background:#f0f7ff;"' : ''}>
                <td style="font-weight:600;">v${v.version_number}${isCurrent ? ' ✓' : ''}</td>
                <td>${date}</td>
                <td>${esc(v.created_by || '-')}</td>
                <td>${esc(v.change_notes || '-')}</td>
                <td>${formatFileSize(v.file_size || 0)}</td>
                <td class="actions-cell">
                    <a href="${API}?action=document_download&id=${d.id}&version=${v.version_number}" target="_blank" title="Lataa">⬇️</a>
                    ${isAdmin && !isCurrent ? `<button onclick="restoreDocVersion('${d.id}', '${v.id}', ${v.version_number})" title="Palauta tämä versio" style="background:none;border:none;cursor:pointer;font-size:1rem;">🔄</button>` : ''}
                </td>
            </tr>`;
        }).join('');
    }
}

// Latausnappi
document.getElementById('btn-doc-download')?.addEventListener('click', () => {
    if (!currentDocument || !currentDocument.current_version) return;
    window.open(`${API}?action=document_download&id=${currentDocument.id}&version=${currentDocument.current_version}`, '_blank');
});

// Uusi versio
document.getElementById('btn-doc-upload-version')?.addEventListener('click', async () => {
    const fileInput = document.getElementById('doc-version-file');
    const notesInput = document.getElementById('doc-version-notes');
    if (!fileInput.files.length) { alert('Valitse tiedosto'); return; }
    if (!currentDocument) return;

    const fd = new FormData();
    fd.append('document_id', currentDocument.id);
    fd.append('file', fileInput.files[0]);
    fd.append('change_notes', notesInput.value || '');

    try {
        const res = await fetch(`${API}?action=document_upload`, { method: 'POST', credentials: 'include', body: fd });
        const text = await res.text();
        let data;
        try { data = JSON.parse(text); } catch (e) { throw new Error('Palvelin palautti virheellisen vastauksen'); }
        if (!res.ok) throw new Error(data.error || 'Virhe');
        currentDocument = data;
        renderDocReadView();
        fileInput.value = '';
        notesInput.value = '';
    } catch (e) { alert('Tiedoston lataus epäonnistui: ' + e.message); }
});

async function restoreDocVersion(docId, versionId, versionNum) {
    if (!confirm(`Palautetaanko versio ${versionNum}? Siitä tulee uusi nykyinen versio.`)) return;
    try {
        currentDocument = await apiCall('document_restore', 'POST', { document_id: docId, version_id: versionId });
        renderDocReadView();
    } catch (e) { alert('Palautus epäonnistui: ' + e.message); }
}

// Poista dokumentti
document.getElementById('btn-doc-delete')?.addEventListener('click', async () => {
    if (!currentDocument) return;
    if (!confirm(`Poistetaanko dokumentti "${currentDocument.title}" ja kaikki sen versiot?`)) return;
    try {
        await apiCall('document_delete', 'POST', { id: currentDocument.id });
        currentDocument = null;
        showDocsListView();
        loadDocuments();
    } catch (e) { alert('Poisto epäonnistui: ' + e.message); }
});

// Navigaatio
document.getElementById('btn-doc-back')?.addEventListener('click', () => { showDocsListView(); });
document.getElementById('btn-doc-edit')?.addEventListener('click', () => { openDocEdit(currentDocument); });
document.getElementById('btn-doc-edit-back')?.addEventListener('click', () => {
    if (currentDocument) showDocReadView();
    else showDocsListView();
});
document.getElementById('btn-doc-edit-cancel')?.addEventListener('click', () => {
    if (currentDocument) showDocReadView();
    else showDocsListView();
});

// Uusi dokumentti
document.getElementById('btn-new-document')?.addEventListener('click', () => { openDocEdit(null); });

function openDocEdit(doc) {
    document.getElementById('doc-edit-id').value = doc?.id || '';
    document.getElementById('doc-edit-name').value = doc?.title || '';
    document.getElementById('doc-edit-description').value = doc?.description || '';
    document.getElementById('doc-edit-category').value = doc?.category || 'muu';
    document.getElementById('doc-edit-title').textContent = doc ? 'Muokkaa dokumenttia' : 'Uusi dokumentti';

    // Täytä asiakas-dropdown
    const custSel = document.getElementById('doc-edit-customer');
    custSel.innerHTML = '<option value="">Ei asiakasta (yleinen)</option>';
    if (typeof customers !== 'undefined') {
        customers.forEach(c => {
            custSel.innerHTML += `<option value="${c.id}" ${doc?.customer_id === c.id ? 'selected' : ''}>${esc(c.yritys)}</option>`;
        });
    }
    if (doc?.customer_id) custSel.value = doc.customer_id;

    // Piilota tiedostokenttä muokkaustilassa (versiot hoidetaan read-viewissä)
    document.getElementById('doc-edit-file').parentElement.style.display = doc ? 'none' : '';

    showDocEditView();
}

// Lomakkeen lähetys
document.getElementById('doc-edit-form')?.addEventListener('submit', async (e) => {
    e.preventDefault();
    const id = document.getElementById('doc-edit-id').value;
    const docData = {
        id: id || undefined,
        title: document.getElementById('doc-edit-name').value.trim(),
        description: document.getElementById('doc-edit-description').value.trim(),
        category: document.getElementById('doc-edit-category').value,
        customer_id: document.getElementById('doc-edit-customer').value || null,
        created_by: currentUser?.username || ''
    };

    if (!docData.title) { alert('Otsikko on pakollinen'); return; }

    try {
        const saved = await apiCall('document_save', 'POST', docData);
        const docId = saved.id;

        // Jos uusi dokumentti ja tiedosto valittu → lataa ensimmäinen versio
        const fileInput = document.getElementById('doc-edit-file');
        if (!id && fileInput.files.length > 0) {
            const fd = new FormData();
            fd.append('document_id', docId);
            fd.append('file', fileInput.files[0]);
            fd.append('change_notes', 'Ensimmäinen versio');
            const res = await fetch(`${API}?action=document_upload`, { method: 'POST', credentials: 'include', body: fd });
            const text = await res.text();
            let data;
            try { data = JSON.parse(text); } catch (err) { throw new Error('Tiedoston lataus epäonnistui'); }
            if (!res.ok) throw new Error(data.error || 'Virhe');
        }

        currentDocument = await apiCall(`document&id=${docId}`);
        renderDocReadView();
        showDocReadView();
        loadDocuments();
    } catch (e) { alert('Tallennus epäonnistui: ' + e.message); }
});

// ==================== LAITETILAT ====================

let allLaitetilat = [];
let currentLaitetila = null;

function showLaitetilatListView() {
    document.getElementById('laitetilat-list-view').style.display = '';
    document.getElementById('laitetila-read-view').style.display = 'none';
    document.getElementById('laitetila-edit-view').style.display = 'none';
}

function showLaitetilaReadView() {
    document.getElementById('laitetilat-list-view').style.display = 'none';
    document.getElementById('laitetila-read-view').style.display = '';
    document.getElementById('laitetila-edit-view').style.display = 'none';
}

function showLaitetilaEditView() {
    document.getElementById('laitetilat-list-view').style.display = 'none';
    document.getElementById('laitetila-read-view').style.display = 'none';
    document.getElementById('laitetila-edit-view').style.display = '';
}

async function loadLaitetilat() {
    try {
        allLaitetilat = await apiCall('laitetilat');
        renderLaitetilatList();
    } catch (e) { console.error('Laitetilojen lataus epäonnistui:', e); }
}

function renderLaitetilatList() {
    const grid = document.getElementById('laitetilat-grid');
    const noEl = document.getElementById('no-laitetilat');

    if (allLaitetilat.length === 0) {
        grid.innerHTML = '';
        noEl.style.display = '';
        return;
    }
    noEl.style.display = 'none';

    grid.innerHTML = allLaitetilat.map(t => `
        <div class="laitetila-card" onclick="openLaitetilaRead('${t.id}')">
            <h4>${esc(t.nimi)}</h4>
            <p class="laitetila-osoite">${esc(t.osoite || '')}</p>
            <p class="laitetila-meta">📁 ${t.file_count || 0} tiedostoa</p>
        </div>
    `).join('');
}

async function openLaitetilaRead(tilaId) {
    try {
        currentLaitetila = await apiCall(`laitetila&id=${tilaId}`);
        renderLaitetilaReadView();
        showLaitetilaReadView();
    } catch (e) { alert('Laitetilan avaus epäonnistui: ' + e.message); }
}

function renderLaitetilaReadView() {
    const t = currentLaitetila;
    if (!t) return;

    document.getElementById('laitetila-read-nimi').textContent = t.nimi || '';
    document.getElementById('laitetila-read-osoite').textContent = t.osoite ? '📍 ' + t.osoite : '';
    document.getElementById('laitetila-read-kuvaus').textContent = t.kuvaus || '';

    const isAdmin = currentUser?.role === 'admin' || currentUser?.role === 'superadmin';
    document.getElementById('btn-laitetila-delete').style.display = isAdmin ? '' : 'none';

    // Erota kuvat ja muut tiedostot
    const files = t.files || [];
    const images = files.filter(f => (f.mime_type || '').startsWith('image/'));
    const otherFiles = files.filter(f => !(f.mime_type || '').startsWith('image/'));

    // Kuvagalleria
    const gallerySection = document.getElementById('laitetila-gallery');
    const galleryGrid = document.getElementById('laitetila-gallery-grid');
    if (images.length > 0) {
        gallerySection.style.display = '';
        galleryGrid.innerHTML = images.map(f => {
            const imgUrl = `${API}?action=laitetila_file_download&laitetila_id=${t.id}&file_id=${f.id}`;
            return `<div class="gallery-item">
                <img src="${imgUrl}" alt="${esc(f.original_name)}" onclick="window.open('${imgUrl}', '_blank')" title="Klikkaa avataksesi">
                <div class="gallery-caption">
                    <span>${esc(f.original_name)}</span>
                    ${isAdmin ? `<button onclick="deleteLaitetilaFile('${f.id}')" class="btn-icon" title="Poista">🗑</button>` : ''}
                </div>
            </div>`;
        }).join('');
    } else {
        gallerySection.style.display = 'none';
    }

    // Muut tiedostot
    const filesSection = document.getElementById('laitetila-files-section');
    const filesList = document.getElementById('laitetila-files-list');
    if (otherFiles.length > 0) {
        filesSection.style.display = '';
        filesList.innerHTML = otherFiles.map(f => {
            const dlUrl = `${API}?action=laitetila_file_download&laitetila_id=${t.id}&file_id=${f.id}`;
            return `<div class="laitetila-file-item">
                <div>
                    <a href="${dlUrl}" target="_blank" class="file-name">${esc(f.original_name)}</a>
                    <span class="file-meta">${formatFileSize(f.file_size || 0)} · ${f.luotu ? new Date(f.luotu).toLocaleDateString('fi-FI') : ''}</span>
                    ${f.description ? `<span class="file-desc">${esc(f.description)}</span>` : ''}
                </div>
                ${isAdmin ? `<button onclick="deleteLaitetilaFile('${f.id}')" class="btn-icon" title="Poista">🗑</button>` : ''}
            </div>`;
        }).join('');
    } else {
        filesSection.style.display = 'none';
    }
}

// Tiedoston lataus
document.getElementById('btn-laitetila-upload')?.addEventListener('click', async () => {
    const fileInput = document.getElementById('laitetila-file-input');
    const descInput = document.getElementById('laitetila-file-desc');
    if (!fileInput.files.length) { alert('Valitse tiedosto'); return; }
    if (!currentLaitetila) return;

    for (const file of fileInput.files) {
        const fd = new FormData();
        fd.append('laitetila_id', currentLaitetila.id);
        fd.append('file', file);
        fd.append('description', descInput.value || '');

        try {
            const res = await fetch(`${API}?action=laitetila_file_upload`, { method: 'POST', credentials: 'include', body: fd });
            const text = await res.text();
            let data;
            try { data = JSON.parse(text); } catch (e) { throw new Error('Palvelin palautti virheellisen vastauksen'); }
            if (!res.ok) throw new Error(data.error || 'Virhe');
            currentLaitetila = data;
        } catch (e) { alert('Tiedoston lataus epäonnistui: ' + e.message); }
    }

    renderLaitetilaReadView();
    fileInput.value = '';
    descInput.value = '';
});

async function deleteLaitetilaFile(fileId) {
    if (!confirm('Poistetaanko tiedosto?')) return;
    try {
        await apiCall('laitetila_file_delete', 'POST', { id: fileId });
        // Päivitä näkymä
        currentLaitetila = await apiCall(`laitetila&id=${currentLaitetila.id}`);
        renderLaitetilaReadView();
    } catch (e) { alert('Poisto epäonnistui: ' + e.message); }
}

// Navigaatio
document.getElementById('btn-laitetila-back')?.addEventListener('click', () => { showLaitetilatListView(); });
document.getElementById('btn-laitetila-edit')?.addEventListener('click', () => { openLaitetilaEdit(currentLaitetila); });
document.getElementById('btn-laitetila-edit-back')?.addEventListener('click', () => {
    if (currentLaitetila) showLaitetilaReadView();
    else showLaitetilatListView();
});
document.getElementById('btn-laitetila-edit-cancel')?.addEventListener('click', () => {
    if (currentLaitetila) showLaitetilaReadView();
    else showLaitetilatListView();
});

// Poista laitetila
document.getElementById('btn-laitetila-delete')?.addEventListener('click', async () => {
    if (!currentLaitetila) return;
    if (!confirm(`Poistetaanko laitetila "${currentLaitetila.nimi}" ja kaikki sen tiedostot?`)) return;
    try {
        await apiCall('laitetila_delete', 'POST', { id: currentLaitetila.id });
        currentLaitetila = null;
        showLaitetilatListView();
        loadLaitetilat();
    } catch (e) { alert('Poisto epäonnistui: ' + e.message); }
});

// Uusi laitetila
document.getElementById('btn-new-laitetila')?.addEventListener('click', () => { openLaitetilaEdit(null); });

function openLaitetilaEdit(tila) {
    document.getElementById('laitetila-edit-id').value = tila?.id || '';
    document.getElementById('laitetila-edit-nimi').value = tila?.nimi || '';
    document.getElementById('laitetila-edit-osoite').value = tila?.osoite || '';
    document.getElementById('laitetila-edit-kuvaus').value = tila?.kuvaus || '';
    document.getElementById('laitetila-edit-title').textContent = tila ? 'Muokkaa laitetilaa' : 'Uusi laitetila';
    showLaitetilaEditView();
}

// Lomakkeen lähetys
document.getElementById('laitetila-edit-form')?.addEventListener('submit', async (e) => {
    e.preventDefault();
    const id = document.getElementById('laitetila-edit-id').value;
    const tilaData = {
        id: id || undefined,
        nimi: document.getElementById('laitetila-edit-nimi').value.trim(),
        osoite: document.getElementById('laitetila-edit-osoite').value.trim(),
        kuvaus: document.getElementById('laitetila-edit-kuvaus').value.trim()
    };

    if (!tilaData.nimi) { alert('Nimi on pakollinen'); return; }

    try {
        const saved = await apiCall('laitetila_save', 'POST', tilaData);
        currentLaitetila = saved;
        renderLaitetilaReadView();
        showLaitetilaReadView();
        loadLaitetilat();
    } catch (e) { alert('Tallennus epäonnistui: ' + e.message); }
});

// ==================== MODUULIT ====================

const ALL_MODULES = ['customers', 'support', 'leads', 'tekniikka', 'ohjeet', 'todo', 'documents', 'laitetilat', 'netadmin', 'archive', 'changelog', 'settings'];
const DEFAULT_MODULES = ['customers', 'support', 'archive', 'changelog', 'settings'];

function applyModules(modules) {
    // Yhteensopivuus: vanha 'devices' → 'tekniikka'
    if (modules && modules.includes('devices') && !modules.includes('tekniikka')) {
        modules = modules.map(m => m === 'devices' ? 'tekniikka' : m);
    }
    // Jos tyhjä array → kaikki moduulit päällä (fallback)
    const enabled = (modules && modules.length > 0) ? modules : ALL_MODULES;
    const isAdminUser = currentUser?.role === 'admin' || currentUser?.role === 'superadmin';
    ALL_MODULES.forEach(mod => {
        const tabBtn = document.querySelector(`.tab[data-tab="${mod}"]`);
        if (tabBtn) {
            // settings-tabi näkyy vain adminille/superadminille
            if (mod === 'settings') {
                tabBtn.style.display = (enabled.includes(mod) && isAdminUser) ? '' : 'none';
            } else {
                tabBtn.style.display = enabled.includes(mod) ? '' : 'none';
            }
        }
    });
    // Jos aktiivinen tabi on piilotettu → vaihda ensimmäiseen näkyvään
    const activeTab = document.querySelector('.tab.active');
    if (activeTab && activeTab.style.display === 'none') {
        const firstVisible = document.querySelector('.tab[data-tab]:not([style*="display: none"])');
        if (firstVisible) switchToTab(firstVisible.dataset.tab);
    }
}

// ==================== BRANDING ====================

function applyBranding(branding) {
    const color = branding.primary_color || '#0f3460';
    const nimi = branding.nimi || 'Noxus Intra';
    const subtitle = branding.subtitle || '';
    const logoUrl = branding.logo_url || '';

    // CSS-muuttuja
    document.documentElement.style.setProperty('--primary-color', color);
    // Laske tumma variantti
    document.documentElement.style.setProperty('--primary-dark', color);

    // Login-sivu
    const loginLogo = document.getElementById('login-logo');
    const loginTitle = document.getElementById('login-title');
    const loginSubtitle = document.getElementById('login-subtitle');
    if (loginLogo) {
        if (logoUrl) { loginLogo.src = logoUrl; loginLogo.style.display = ''; }
        else { loginLogo.style.display = 'none'; }
    }
    if (loginTitle) { loginTitle.style.display = logoUrl ? 'none' : ''; if (!logoUrl) loginTitle.textContent = nimi; }
    if (loginSubtitle) { loginSubtitle.style.display = logoUrl ? 'none' : ''; if (!logoUrl) loginSubtitle.textContent = subtitle || 'Kirjaudu sisään'; }
    // Muut login-boxien otsikot
    document.querySelectorAll('.login-brand-title').forEach(el => el.textContent = nimi);

    // Header
    const headerLogo = document.getElementById('header-logo');
    const headerIcon = document.getElementById('header-brand-icon');
    const headerTitle = document.getElementById('header-title');
    const headerSubtitle = document.getElementById('header-subtitle');
    if (headerLogo) {
        if (logoUrl) { headerLogo.src = logoUrl; headerLogo.style.display = ''; if (headerIcon) headerIcon.style.display = 'none'; }
        else { headerLogo.style.display = 'none'; if (headerIcon) headerIcon.style.display = ''; }
    }
    // Kun logo on, piilotetaan tekstit — logo riittää
    if (headerTitle) { headerTitle.style.display = logoUrl ? 'none' : ''; if (!logoUrl) headerTitle.textContent = nimi; }
    if (headerSubtitle) { headerSubtitle.style.display = logoUrl ? 'none' : ''; if (!logoUrl) headerSubtitle.textContent = subtitle || ''; }

    // Sivun title
    document.title = nimi;
}

async function loadBranding() {
    try {
        const data = await apiCall('branding');
        applyBranding(data);
    } catch (e) {
        // Oletusbrändäys
        applyBranding({ nimi: 'Noxus Intra', primary_color: '#0f3460', subtitle: 'Hallintapaneeli', logo_url: '' });
    }
}

// Init — branding ensin (luo session-cookien), sitten captcha + auth
loadBranding().then(() => {
    loadCaptcha();
    checkAuth();
});