const API = '/password-manager/api.php';
let token = sessionStorage.getItem('authToken');
let csrfToken = sessionStorage.getItem('csrfToken') || '';
let curUser = sessionStorage.getItem('currentUsername');
function a2b64(arr) { return btoa(String.fromCharCode(...new Uint8Array(arr))).replace(/\+/g,'-').replace(/\//g,'_').replace(/=+$/,''); }
function b642ab(s) { return Uint8Array.from(atob(s.replace(/-/g,'+').replace(/_/g,'/')), c=>c.charCodeAt(0)).buffer; }
let view = localStorage.getItem('vaultView') || 'grid';
let showView = localStorage.getItem('showViewBtn') !== 'false';
let showMail = localStorage.getItem('showEmail') !== 'false';
let dark = localStorage.getItem('darkTheme') !== 'false';
let lockMin = parseInt(localStorage.getItem('autoLockMinutes') || '5');
let order = JSON.parse(localStorage.getItem('entryOrder') || '[]');
let selectedFolder = localStorage.getItem('selectedFolder') || 'All';
let entries = [];
let folders = ['All'];
let genPwdVal = '';
let cryptoKey = null;
let searchQuery = '';
let idleT, warnT, countT;
let draggedId = null;
let showTrash = false;
let selectedIds = new Set();
let lastSelectedId = null;
let rectState = { active: false, startX: 0, startY: 0, el: null, started: false };

// ==================== SOUND ====================
let soundEnabled = localStorage.getItem('soundEnabled') !== 'false';
let audioCtx = null;

function getAudioContext() {
    if (!audioCtx) {
        audioCtx = new (window.AudioContext || window.webkitAudioContext)();
    }
    return audioCtx;
}

function playTone(freq, duration, type = 'sine', volume = 0.08) {
    if (!soundEnabled) return;
    try {
        const ctx = getAudioContext();
        const osc = ctx.createOscillator();
        const gain = ctx.createGain();
        osc.type = type;
        osc.frequency.setValueAtTime(freq, ctx.currentTime);
        gain.gain.setValueAtTime(volume, ctx.currentTime);
        gain.gain.exponentialRampToValueAtTime(0.001, ctx.currentTime + duration);
        osc.connect(gain);
        gain.connect(ctx.destination);
        osc.start(ctx.currentTime);
        osc.stop(ctx.currentTime + duration);
    } catch (e) { /* ignore */ }
}

function playSound(type) {
    if (!soundEnabled) return;
    switch (type) {
        case 'click': playTone(800, 0.08, 'sine', 0.06); break;
        case 'success':
            playTone(523, 0.1, 'sine', 0.1);
            setTimeout(() => playTone(659, 0.1, 'sine', 0.1), 100);
            setTimeout(() => playTone(784, 0.15, 'sine', 0.1), 200);
            break;
        case 'error':
            playTone(200, 0.2, 'square', 0.06);
            setTimeout(() => playTone(150, 0.3, 'square', 0.06), 150);
            break;
        case 'delete':
            playTone(150, 0.15, 'triangle', 0.08);
            break;
        case 'copy':
            playTone(1200, 0.05, 'sine', 0.07);
            break;
        case 'generate':
            playTone(440, 0.05, 'sine', 0.05);
            setTimeout(() => playTone(554, 0.05, 'sine', 0.05), 60);
            setTimeout(() => playTone(659, 0.05, 'sine', 0.05), 120);
            setTimeout(() => playTone(880, 0.1, 'sine', 0.07), 180);
            break;
        case 'open':
            playTone(600, 0.12, 'sine', 0.06);
            setTimeout(() => playTone(800, 0.1, 'sine', 0.06), 80);
            break;
        case 'close':
            playTone(800, 0.08, 'sine', 0.05);
            setTimeout(() => playTone(600, 0.1, 'sine', 0.05), 80);
            break;
        case 'login':
            playTone(523, 0.1, 'sine', 0.08);
            setTimeout(() => playTone(659, 0.1, 'sine', 0.08), 100);
            setTimeout(() => playTone(784, 0.2, 'sine', 0.1), 200);
            break;
        case 'register':
            playTone(440, 0.1, 'sine', 0.08);
            setTimeout(() => playTone(554, 0.1, 'sine', 0.08), 100);
            setTimeout(() => playTone(659, 0.15, 'sine', 0.1), 200);
            break;
    }
}

function toggleSound() {
    soundEnabled = !soundEnabled;
    localStorage.setItem('soundEnabled', soundEnabled);
    if (soundEnabled) playTone(440, 0.05);
    syncSettingsUI();
}

// ==================== TOAST ====================
function toast(m, t) { t = t || 'success'; const c = document.getElementById('toastContainer'); const d = document.createElement('div'); d.className = 'toast ' + t; d.textContent = m; c.appendChild(d); setTimeout(() => d.remove(), 3000); }
function showZigzagToast(elem, msg, type) {
    const t = document.createElement('div');
    t.className = 'toast-zigzag ' + (type || 'success');
    t.textContent = msg;
    document.body.appendChild(t);
    const r = elem.getBoundingClientRect();
    t.style.left = r.left + 'px';
    t.style.top = r.top + 'px';
    setTimeout(() => t.remove(), 1500);
}

// ==================== THEME ====================
function applyTheme() { document.body.classList.toggle('light', !dark); }
function toggleTheme() { dark = !dark; localStorage.setItem('darkTheme', dark); applyTheme(); syncSettingsUI(); playSound('click'); }

// ==================== CRYPTO ====================
function checkStrength() { const p = document.getElementById('passwordInput').value; const b = document.getElementById('strengthBar'); let s = 0; if (p.length >= 8) s++; if (p.length >= 12) s++; if (/[A-Z]/.test(p) && /[a-z]/.test(p)) s++; if (/\d/.test(p)) s++; if (/[!@#$%^&*()_+\-=\[\]{}|;:,.<>?]/.test(p)) s++; b.className = 'strength-bar s' + Math.min(4, s); }
async function deriveKey(pwd, salt) { const enc = new TextEncoder(); const km = await crypto.subtle.importKey('raw', enc.encode(pwd), 'PBKDF2', false, ['deriveKey']); const sb = Uint8Array.from(atob(salt), c => c.charCodeAt(0)); return crypto.subtle.deriveKey({ name: 'PBKDF2', salt: sb, iterations: 100000, hash: 'SHA-256' }, km, { name: 'AES-GCM', length: 256 }, true, ['encrypt', 'decrypt']); }
async function encryptPwd(plain) { const iv = crypto.getRandomValues(new Uint8Array(12)); const enc = await crypto.subtle.encrypt({ name: 'AES-GCM', iv }, cryptoKey, new TextEncoder().encode(plain)); return { encrypted: btoa(String.fromCharCode(...new Uint8Array(enc))), iv: btoa(String.fromCharCode(...iv)) }; }
async function decryptPwd(encB64, ivB64) { try { const enc = Uint8Array.from(atob(encB64), c => c.charCodeAt(0)); const iv = Uint8Array.from(atob(ivB64), c => c.charCodeAt(0)); const dec = await crypto.subtle.decrypt({ name: 'AES-GCM', iv }, cryptoKey, enc); return new TextDecoder().decode(dec); } catch (e) { return '[ERROR]'; } }
async function persistCryptoKey() { const raw = await crypto.subtle.exportKey('raw', cryptoKey); sessionStorage.setItem('cryptoKey', btoa(String.fromCharCode(...new Uint8Array(raw)))); }
async function restoreCryptoKey() { const saved = sessionStorage.getItem('cryptoKey'); if (!saved) return false; try { const raw = Uint8Array.from(atob(saved), c => c.charCodeAt(0)); cryptoKey = await crypto.subtle.importKey('raw', raw, { name: 'AES-GCM' }, false, ['encrypt', 'decrypt']); return true; } catch (e) { return false; } }

// ==================== AUTO-LOCK ====================
function setAutoLock() { lockMin = parseInt(document.getElementById('autoLockTimer').value); localStorage.setItem('autoLockMinutes', lockMin); resetIdle(); }
function resetIdle() { clearTimeout(idleT); clearTimeout(warnT); clearInterval(countT); document.getElementById('idleWarning').classList.remove('show'); if (lockMin > 0 && token) { const lm = lockMin * 60000; warnT = setTimeout(() => { document.getElementById('idleWarning').classList.add('show'); let cd = 30; document.getElementById('idleCountdown').textContent = cd; countT = setInterval(() => { cd--; document.getElementById('idleCountdown').textContent = cd; if (cd <= 0) { clearInterval(countT); doLogout(); } }, 1000); }, Math.max(0, lm - 30000)); idleT = setTimeout(() => doLogout(), lm); } }

// ==================== USERNAME ====================
function saveUsername() { const f = document.getElementById('addUsername'); if (f && f.value.trim()) localStorage.setItem('savedUsername', f.value.trim()); }
function loadUsername() { const s = localStorage.getItem('savedUsername'); const f = document.getElementById('addUsername'); if (s && f) f.value = s; }

// ==================== FOLDERS ====================
async function loadFolders() {
    if (!token) return;
    try {
        const r = await fetch(API + '/folders', { headers: { 'Authorization': 'Bearer ' + token } });
        if (r.ok) {
            const data = await r.json();
            if (Array.isArray(data)) {
                folders = data.filter(f => typeof f === 'string');
                if (!folders.includes('All')) folders.unshift('All');
            } else {
                folders = ['All'];
            }
        } else {
            folders = ['All'];
        }
    } catch (e) {
        folders = ['All'];
    }
}

async function addFolderToServer(name) {
    try {
        const r = await fetch(API + '/folders', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken },
            body: JSON.stringify({ name })
        });
        if (r.ok) { await loadFolders(); return true; }
        const d = await r.json();
        toast('❌ ' + (d.error || 'Error'), 'error');
        return false;
    } catch (e) { toast('⚠️ Connection error', 'error'); return false; }
}

async function deleteFolderFromServer(name) {
    try {
        const r = await fetch(API + '/folders/' + encodeURIComponent(name), {
            method: 'DELETE',
            headers: { 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken }
        });
        if (r.ok) {
            await loadFolders();
            if (selectedFolder === name) { selectedFolder = 'All'; localStorage.setItem('selectedFolder', 'All'); }
            return true;
        }
        const d = await r.json();
        toast('❌ ' + (d.error || 'Error'), 'error');
        return false;
    } catch (e) { toast('⚠️ Connection error', 'error'); return false; }
}

function folderColor(name) {
    if (name === 'All') return '';
    let hash = 0;
    for (let i = 0; i < name.length; i++) hash = name.charCodeAt(i) + ((hash << 5) - hash);
    const hue = ((hash % 360) + 360) % 360;
    return `style="--chip-color:hsl(${hue},60%,55%)"`;
}
function renderFolders() {
    const bar = document.getElementById('foldersBar');
    if (!bar) return;
    entries.forEach(e => { if (!e.folder || typeof e.folder !== 'string') e.folder = 'All'; });
    const counts = {};
    entries.forEach(e => { const f = e.folder; counts[f] = (counts[f] || 0) + 1; });
    let html = '';
    folders.forEach(f => {
        if (!f) return;
        const count = counts[f] || 0;
        const color = folderColor(f);
        html += `<span class="folder-chip${selectedFolder === f ? ' active' : ''}" ${color} data-folder="${esc(f)}" onclick="selectFolder('${esc(f)}')">📁 ${esc(f)}<span class="folder-count">${count}</span>${f !== 'All' ? `<button class="folder-delete-btn" onclick="event.stopPropagation();showDeleteFolderConfirm('${esc(f)}')">✕</button>` : ''}</span>`;
    });
    html += `<button class="folder-add-btn" onclick="showAddFolderModal()">+ New</button>`;
    bar.innerHTML = html;
    // Make folders drop targets for moving entries
    bar.querySelectorAll('.folder-chip[data-folder]').forEach(chip => {
        chip.addEventListener('dragover', e => { e.preventDefault(); chip.classList.add('drag-over'); });
        chip.addEventListener('dragleave', () => chip.classList.remove('drag-over'));
        chip.addEventListener('drop', async function(e) {
            e.preventDefault();
            this.classList.remove('drag-over');
            const id = parseInt(e.dataTransfer.getData('text/plain'));
            if (!id) return;
            const entry = entries.find(x => x.id === id);
            if (!entry) return;
            const folder = this.dataset.folder;
            const ids = selectedIds.has(id) && selectedIds.size > 1 ? [...selectedIds] : [id];
            let moved = 0;
            for (const sid of ids) {
                const e2 = entries.find(x => x.id === sid);
                if (!e2 || e2.folder === folder) continue;
                const enc = await encryptPwd(e2.password);
                const r = await fetch(API + '/entries/' + sid, {
                    method: 'PUT',
                    headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken },
                    body: JSON.stringify({ site: e2.site, username: e2.username, encrypted_password: enc.encrypted, iv: enc.iv, folder })
                });
                if (r.ok) { e2.folder = folder; moved++; }
            }
            renderFolders();
            render();
            if (moved) playSound('success');
        });
    });
}



function selectFolder(f) {
    selectedFolder = f;
    localStorage.setItem('selectedFolder', f);
    renderFolders();
    populateFolderSelects();
    render();
    playSound('click');
}

function showAddFolderModal() {
    const overlay = document.createElement('div');
    overlay.className = 'custom-modal-overlay show';
    overlay.innerHTML = `<div class="custom-modal"><h3>📁 New Folder</h3><input type="text" id="newFolderName" placeholder="Folder name"><div class="modal-actions"><button class="btn btn-outline btn-sm" id="cancelAddFolder">Cancel</button><button class="btn btn-sm" id="confirmAddFolder">Create</button></div></div>`;
    document.body.appendChild(overlay);
    document.getElementById('cancelAddFolder').onclick = () => overlay.remove();
    document.getElementById('confirmAddFolder').onclick = async () => {
        const name = document.getElementById('newFolderName').value.trim();
        if (!name) { toast('Enter a name', 'error'); return; }
        const ok = await addFolderToServer(name);
        if (ok) { renderFolders(); populateFolderSelects(); overlay.remove(); toast('📁 Folder created!'); playSound('success'); }
    };
    overlay.addEventListener('click', (e) => { if (e.target === overlay) overlay.remove(); });
    playSound('open');
}

function showDeleteFolderConfirm(folderName) {
    const overlay = document.createElement('div');
    overlay.className = 'custom-modal-overlay show';
    overlay.innerHTML = `<div class="custom-modal"><h3>🗑️ Delete Folder</h3><p style="color:var(--text2);margin-bottom:1rem;">Delete "${folderName}"? Entries move to "All".</p><div class="modal-actions"><button class="btn btn-outline btn-sm" id="cancelDeleteFolder">Cancel</button><button class="btn btn-sm btn-danger" id="confirmDeleteFolder">Delete</button></div></div>`;
    document.body.appendChild(overlay);
    document.getElementById('cancelDeleteFolder').onclick = () => overlay.remove();
    document.getElementById('confirmDeleteFolder').onclick = async () => {
        const ok = await deleteFolderFromServer(folderName);
        if (ok) { renderFolders(); populateFolderSelects(); render(); overlay.remove(); toast('📁 Folder deleted'); playSound('delete'); }
    };
    overlay.addEventListener('click', (e) => { if (e.target === overlay) overlay.remove(); });
}

// ==================== TRASH ====================
function toggleTrash() {
    showTrash = !showTrash;
    const btn = document.getElementById('trashBtn');
    const actions = document.getElementById('trashActions');
    if (btn) { btn.textContent = showTrash ? '📋 Active' : '🗑️ Trash'; btn.classList.toggle('btn-danger', showTrash); }
    if (actions) actions.classList.toggle('hidden', !showTrash);
    loadEntries();
    playSound('click');
}
async function restoreEntry(id) {
    try { const r = await fetch(API + '/entries/' + id + '/restore', { method: 'POST', headers: { 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken } }); if (r.ok) { toast('✅ Restored!'); await loadEntries(); playSound('success'); } } catch (e) { toast('⚠️ Error', 'error'); }
}
async function toggleFavorite(id) {
    try { await fetch(API + '/entries/' + id + '/favorite', { method: 'POST', headers: { 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken } }); const e = entries.find(x => x.id == id); if (e) e.favorite = e.favorite ? 0 : 1; renderFolders(); render(); playSound('click'); } catch (e) {}
}
async function permanentDelete(id) {
    if (!confirm('Permanently delete?')) return;
    try { const r = await fetch(API + '/entries/' + id + '?permanent=1', { method: 'DELETE', headers: { 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken } }); if (r.ok) { toast('🗑️ Permanently deleted'); await loadEntries(); playSound('error'); } } catch (e) { toast('⚠️ Error', 'error'); }
}
async function emptyTrash() {
    if (!confirm('Delete ALL trashed entries?')) return;
    try { const r = await fetch(API + '/entries/trash/empty', { method: 'DELETE', headers: { 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken } }); if (r.ok) { toast('🗑️ Trash emptied'); await loadEntries(); playSound('error'); } } catch (e) { toast('⚠️ Error', 'error'); }
}
function timeAgo(dateStr) {
    if (!dateStr) return '';
    const now = new Date(); const d = new Date(dateStr + 'Z');
    const days = 30 - Math.floor((now - d) / (1000 * 60 * 60 * 24));
    return days <= 0 ? 'Expiring' : days + 'd left';
}

// ==================== SETTINGS ====================
function toggleSettings() {
    document.getElementById('settingsMenu').classList.toggle('hidden');
}
function syncSettingsUI() {
    document.getElementById('soundToggleSwitch').classList.toggle('active', soundEnabled);
    document.getElementById('themeToggleSwitch').classList.toggle('active', !dark);
    document.getElementById('showViewBtnToggle').classList.toggle('active', showView);
    document.getElementById('showEmailToggle').classList.toggle('active', showMail);
    document.getElementById('autoLockTimer').value = lockMin;
}
async function registerPasskey() {
    try {
        const r = await fetch(API + '/passkey/register/begin', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken }
        });
        if (!r.ok) { const d = await r.json(); toast('❌ ' + (d.error || 'Failed'), 'error'); return; }
        const opts = await r.json();
        opts.challenge = b642ab(opts.challenge);
        opts.user.id = b642ab(opts.user.id);
        if (!window.PublicKeyCredential) { toast('❌ Passkeys not supported', 'error'); return; }
        const cred = await navigator.credentials.create({ publicKey: opts });
        const result = {
            id: cred.id,
            response: {
                clientDataJSON: a2b64(cred.response.clientDataJSON),
                attestationObject: a2b64(cred.response.attestationObject)
            }
        };
        const r2 = await fetch(API + '/passkey/register/complete', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken },
            body: JSON.stringify(result)
        });
        if (r2.ok) { toast('✅ Passkey registered!'); playSound('success'); }
        else { const d = await r2.json(); toast('❌ ' + (d.error || 'Failed'), 'error'); }
    } catch (e) { toast('⚠️ Passkey setup failed: ' + e.message, 'error'); }
}

// ==================== INIT ====================
function init() {
    document.querySelectorAll('.view-btn').forEach(b => b.classList.toggle('active', b.dataset.view === view));
    document.getElementById('autoLockTimer').value = lockMin;
    applyTheme();
  //  document.getElementById('usernameInput').style.display = showMail ? '' : 'none';
    loadUsername();
    const sl = localStorage.getItem('savedLoginUser');
    if (sl) document.getElementById('loginUsername').value = sl;
    syncSettingsUI();
    document.getElementById('viewToggle').addEventListener('click', e => {
        if (e.target.classList.contains('view-btn')) {
            document.querySelectorAll('.view-btn').forEach(b => b.classList.remove('active'));
            e.target.classList.add('active');
            view = e.target.dataset.view;
            localStorage.setItem('vaultView', view);
            render();
            playSound('click');
        }
    });
    const clearBtn = document.getElementById('clearSearchBtn');
    if (clearBtn) clearBtn.style.display = 'none';
    document.getElementById('addModal').addEventListener('click', e => {
      if (e.target === e.currentTarget) closeAdd();
    });
    // Close settings when clicking outside
    document.addEventListener('click', (e) => {
        const menu = document.getElementById('settingsMenu');
        const btn = document.getElementById('settingsBtn');
        if (menu && !menu.classList.contains('hidden') && !menu.contains(e.target) && e.target !== btn) {
            menu.classList.add('hidden');
        }
    });
}

function toggleViewBtn() { showView = !showView; localStorage.setItem('showViewBtn', showView); syncSettingsUI(); render(); playSound('click'); }
function toggleShowEmail() { showMail = !showMail; localStorage.setItem('showEmail', showMail); syncSettingsUI();  render(); playSound('click'); }

// ==================== GENERATOR ====================
function openGen() { document.getElementById('genModal').style.display = 'flex'; genPwd(); playSound('open'); }
function closeGen() { document.getElementById('genModal').style.display = 'none'; playSound('close'); }
function onLenChange() { document.getElementById('lenVal').textContent = document.getElementById('pwdLen').value; genPwd(); }
function genPreset(len, chars) {
    document.getElementById('pwdLen').value = len;
    document.getElementById('lenVal').textContent = len;
    document.getElementById('useUpper').checked = chars.includes('upper');
    document.getElementById('useLower').checked = chars.includes('lower');
    document.getElementById('useNum').checked = chars.includes('num');
    document.getElementById('useSym').checked = chars.includes('sym');
    genPwd();
    playSound('click');
}
function genPwd() { const l = parseInt(document.getElementById('pwdLen').value); let c = ''; if (document.getElementById('useUpper').checked) c += 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; if (document.getElementById('useLower').checked) c += 'abcdefghijklmnopqrstuvwxyz'; if (document.getElementById('useNum').checked) c += '0123456789'; if (document.getElementById('useSym').checked) c += '!@#$%^&*()_+-=[]{}|;:,.<>?'; if (!c) { document.getElementById('genPreview').textContent = 'Select option'; return; } let p = ''; const arr = new Uint32Array(l); crypto.getRandomValues(arr); for (let i = 0; i < l; i++) p += c.charAt(arr[i] % c.length); genPwdVal = p; document.getElementById('genPreview').textContent = p; }
function useGen() {
  if (!genPwdVal) genPwd();
  // Put the generated password into the add‑modal’s password field
  const pwdField = document.getElementById('addPassword');
  if (pwdField) {
    pwdField.value = genPwdVal;
    checkAddStrength();   // update the strength bar
  }
  navigator.clipboard.writeText(genPwdVal);
  toast('🎲 Copied!');
  closeGen();   // closes the generator modal, not the add modal
}
function populateFolderSelects() {
  ['addFolder', 'editFolder'].forEach(id => {
    const select = document.getElementById(id);
    if (!select) return;
    select.innerHTML = '';
    folders.forEach(f => {
      if (!f) return;
      const option = document.createElement('option');
      option.value = f;
      option.textContent = '📁 ' + f;
      if (f === selectedFolder) option.selected = true;
      select.appendChild(option);
    });
  });
}
function openAdd() {
  document.getElementById('addSite').value = '';
  document.getElementById('addPassword').value = '';
  document.getElementById('addStrengthBar').className = 'strength-bar s0';
  loadUsername();
  populateFolderSelects();
  document.getElementById('addModal').classList.add('show');
  playSound('open');
}

function closeAdd() {
  document.getElementById('addModal').classList.remove('show');
  playSound('close');
}

function checkRegStrength() {
    const p = document.getElementById('regPassword').value;
    const bar = document.getElementById('regStrengthBar');
    let s = 0;
    if (p.length >= 8) s++;
    if (p.length >= 12) s++;
    if (/[A-Z]/.test(p) && /[a-z]/.test(p)) s++;
    if (/\d/.test(p)) s++;
    if (/[!@#$%^&*()_+\-=\[\]{}|;:,.<>?]/.test(p)) s++;
    bar.className = 'strength-bar s' + Math.min(4, s);
}
function checkAddStrength() {
  const p = document.getElementById('addPassword').value;
  const bar = document.getElementById('addStrengthBar');
  let s = 0;
  if (p.length >= 8) s++;
  if (p.length >= 12) s++;
  if (/[A-Z]/.test(p) && /[a-z]/.test(p)) s++;
  if (/\d/.test(p)) s++;
  if (/[!@#$%^&*()_+\-=\[\]{}|;:,.<>?]/.test(p)) s++;
  bar.className = 'strength-bar s' + Math.min(4, s);
}
// ==================== AUTH ====================
function switchTab(t) { document.querySelectorAll('.auth-tab').forEach(x => x.classList.remove('active')); event.target.classList.add('active'); document.getElementById('loginForm').classList.toggle('hidden', t !== 'login'); document.getElementById('registerForm').classList.toggle('hidden', t !== 'register'); }

async function loginWithPasskey() {
    if (!window.PublicKeyCredential) { toast('❌ Passkeys not supported', 'error'); return; }
    const u = document.getElementById('loginUsername').value.trim();
    if (!u) { toast('Enter username first', 'error'); return; }
    document.getElementById('loginBtn').disabled = true;
    try {
        const r = await fetch(API + '/passkey/login/begin', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ username: u })
        });
        if (!r.ok) { const d = await r.json(); toast('❌ ' + (d.error || 'Failed'), 'error'); document.getElementById('loginBtn').disabled = false; return; }
        const opts = await r.json();
        opts.challenge = b642ab(opts.challenge);
        opts.allowCredentials.forEach(c => { c.id = b642ab(c.id); });
        const cred = await navigator.credentials.get({ publicKey: opts });
        const result = {
            id: cred.id,
            response: {
                clientDataJSON: a2b64(cred.response.clientDataJSON),
                authenticatorData: a2b64(cred.response.authenticatorData),
                signature: a2b64(cred.response.signature),
                userHandle: cred.response.userHandle ? a2b64(cred.response.userHandle) : null
            }
        };
        const r2 = await fetch(API + '/passkey/login/complete', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(result)
        });
        const d = await r2.json();
        if (r2.ok) {
            token = d.token; csrfToken = d.csrfToken || ''; curUser = d.username || u;
            sessionStorage.setItem('authToken', token);
            sessionStorage.setItem('csrfToken', csrfToken);
            sessionStorage.setItem('currentUsername', curUser);
            // Try to restore crypto key from sessionStorage
            const restored = await restoreCryptoKey();
            if (!restored) {
                // Need master password once to derive crypto key
                const mp = await new Promise(resolve => {
                    const overlay = document.createElement('div');
                    overlay.className = 'custom-modal-overlay show';
                    overlay.innerHTML = `<div class="custom-modal"><h3>🔑 One more step</h3><p style="color:var(--text2);margin-bottom:1rem">Enter your master password to unlock the vault</p><input type="password" id="passkeyTempPwd" placeholder="Master password" style="width:100%"><div class="modal-actions" style="margin-top:1rem"><button class="btn btn-sm" id="passkeyTempBtn">Unlock</button></div></div>`;
                    document.body.appendChild(overlay);
                    document.getElementById('passkeyTempBtn').onclick = () => resolve(document.getElementById('passkeyTempPwd').value);
                    overlay.addEventListener('keydown', function handler(e) { if (e.key === 'Enter') { resolve(document.getElementById('passkeyTempPwd').value); overlay.remove(); document.removeEventListener('keydown', handler); } });
                });
                const m = document.querySelector('.custom-modal-overlay.show');
                if (m) m.remove();
                cryptoKey = await deriveKey(mp, d.salt);
                persistCryptoKey();
            }
            await loadFolders();
            toast('✅ Biometric login!');
            playSound('login');
            showVault();
            loadEntries();
        } else { toast('❌ ' + (d.error || 'Failed'), 'error'); }
    } catch (e) { toast('⚠️ Passkey login failed: ' + e.message, 'error'); }
    finally { document.getElementById('loginBtn').disabled = false; }
}
async function login() {
    const u = document.getElementById('loginUsername').value.trim();
    const p = document.getElementById('loginPassword').value;
    if (!u || !p) { toast('Fill all fields', 'error'); return; }
    document.getElementById('loginBtn').disabled = true;
    localStorage.setItem('savedLoginUser', u);
    try {
        const r = await fetch(API + '/login', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ username: u, masterPassword: p }) });
        const d = await r.json();
        if (r.ok) {
            token = d.token; csrfToken = d.csrfToken || ''; curUser = u;
            cryptoKey = await deriveKey(p, d.salt);
            persistCryptoKey();
            sessionStorage.setItem('authToken', token);
            sessionStorage.setItem('csrfToken', csrfToken);
            sessionStorage.setItem('currentUsername', u);
            await loadFolders();
            toast('✅ Login!');
            playSound('login');
            showVault();
            loadEntries();
        } else { toast('❌ ' + (d.error || 'Invalid'), 'error'); document.getElementById('loginPassword').value = ''; }
    } catch (e) { toast('⚠️ Connection error', 'error'); }
    finally { document.getElementById('loginBtn').disabled = false; }
}

async function register() {
    const u = document.getElementById('regUsername').value.trim();
    const p = document.getElementById('regPassword').value;
    if (u.length < 3) { toast('Username min 3', 'error'); return; }
    if (p.length < 8) { toast('Password min 8', 'error'); return; }
    document.getElementById('registerBtn').disabled = true;
    try {
        const r = await fetch(API + '/register', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ username: u, masterPassword: p }) });
        const d = await r.json();
        if (r.ok) {
            token = d.token; csrfToken = d.csrfToken || ''; curUser = u;
            cryptoKey = await deriveKey(p, d.salt);
            persistCryptoKey();
            sessionStorage.setItem('authToken', token);
            sessionStorage.setItem('csrfToken', csrfToken);
            sessionStorage.setItem('currentUsername', u);
            await loadFolders();
            toast('✅ Created!');
            playSound('register');
            showVault();
            loadEntries();
        } else { toast('❌ ' + (d.error || 'Failed'), 'error'); }
    } catch (e) { toast('⚠️ Connection error', 'error'); }
    finally { document.getElementById('registerBtn').disabled = false; }
}

async function doLogout() {
    saveUsername();
    if (token) {
        try { await fetch(API + '/logout', { method: 'POST', headers: { 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken } }); } catch (e) {}
    }
    clearTimeout(idleT); clearTimeout(warnT); clearInterval(countT);
    document.getElementById('idleWarning').classList.remove('show');
    token = null; csrfToken = ''; curUser = null; entries = []; cryptoKey = null; folders = ['All']; showTrash = false;
    sessionStorage.clear();
    document.getElementById('authSection').classList.remove('hidden');
    document.getElementById('vaultSection').classList.add('hidden');
    document.getElementById('loginPassword').value = '';
    document.getElementById('loginUsername').value = localStorage.getItem('savedLoginUser') || '';
}

function showVault() {
    document.getElementById('authSection').classList.add('hidden');
    document.getElementById('vaultSection').classList.remove('hidden');
    document.getElementById('currentUser').textContent = '👤 ' + curUser;
    //document.getElementById('usernameInput').style.display = showMail ? '' : 'none';
    document.getElementById('autoLockTimer').value = lockMin;
    loadUsername();
    renderFolders();
    populateFolderSelects();
    syncSettingsUI();
    resetIdle();
}

// ==================== ENTRIES ====================
function applyOrder(list) { if (!list || !list.length) return []; if (!order || !order.length) return list; const map = new Map(list.filter(e => e && e.id).map(e => [e.id, e])); const ord = []; order.forEach(id => { if (map.has(id)) { ord.push(map.get(id)); map.delete(id); } }); map.forEach(e => ord.push(e)); return ord; }

async function loadEntries(q) {
    try {
        let url = API + '/entries?deleted=' + (showTrash ? '1' : '0');
        if (q) url += '&search=' + encodeURIComponent(q);
        const r = await fetch(url, { headers: { 'Authorization': 'Bearer ' + token } });
        if (r.ok) {
            const raw = await r.json();
            entries = [];
            for (const e of raw) {
                if (e.encryption_method === 'client') {
                    const pw = await decryptPwd(e.encrypted_password, e.iv);
                    entries.push({ id: e.id, site: e.site, username: e.username, password: pw, folder: e.folder || 'All', deleted_at: e.deleted_at, favorite: e.favorite || 0 });
                } else {
                    entries.push({ id: e.id, site: e.site, username: e.username, password: e.password || '', folder: e.folder || 'All', deleted_at: e.deleted_at, favorite: e.favorite || 0 });
                }
            }
            entries = applyOrder(entries);
            entries.sort((a, b) => (b.favorite || 0) - (a.favorite || 0));
            document.getElementById('connectionStatus').textContent = '🟢 Connected';
            document.getElementById('entryCount').textContent = '(' + entries.length + ' entries)';
            renderFolders();
            populateFolderSelects();
            render();
        } else if (r.status === 401) { toast('Session expired', 'error'); doLogout(); }
    } catch (e) { document.getElementById('connectionStatus').textContent = '🔴 Error'; toast('Connection error', 'error'); }
}

function getFilteredEntries() {
    if (showTrash) return entries;
    if (selectedFolder === 'All') return entries;
    return entries.filter(e => (e.folder || 'All') === selectedFolder);
}

// ==================== RENDER ====================
function render() {
    const c = document.getElementById('entriesContainer');
    c.className = '';
    if (showTrash) c.classList.add('trash-view');
    c.classList.add(view + '-view');
    const filtered = getFilteredEntries();
    if (!filtered.length) { c.innerHTML = '<div style="text-align:center;color:var(--text2);padding:2rem;grid-column:1/-1">' + (showTrash ? '📭 Trash empty' : '📭 No entries') + '</div>'; return; }
    if (view === 'table') {
        let h = '<table><thead><tr><th></th><th>Site</th>' + (showMail ? '<th>User</th>' : '') + '<th>Password</th>' + (!showTrash ? '<th>Folder</th>' : '<th>Deleted</th>') + '<th>Actions</th></tr></thead><tbody>';
        filtered.forEach(e => {
            const sel = selectedIds.has(e.id);
            h += '<tr class="table-row-drag' + (e.favorite ? ' favorite' : '') + (sel ? ' selected' : '') + '" draggable="true" data-id="' + e.id + '" onclick="toggleSelectEntry(' + e.id + ', event)">' +
                '<td>' + (e.favorite ? '⭐' : '') + '</td>' +
                '<td>🌐 ' + highlightText(e.site, searchQuery) + '</td>' +
                (showMail ? '<td>👤 ' + highlightText(e.username, searchQuery) + '</td>' : '') +
                '<td class="password-cell"><span id="p-' + e.id + '" class="pw-display' + (showView ? ' pw-hover' : '') + '">••••••••</span></td>';
            if (!showTrash) {
            h += '<td><span class="entry-folder">📁 ' + esc(e.folder || 'All') + '</span></td>' +
                '<td class="actions-cell">' +
                    '<button class="star-btn" data-id="' + e.id + '">' + (e.favorite ? '⭐' : '☆') + '</button> ' +
                    '<button class="icon-btn copy-p" data-id="' + e.id + '">📋</button> ' +
                    '<button class="edit-btn" data-id="' + e.id + '" style="position:static;display:inline-flex;vertical-align:middle;">✏️</button> ' +
                    '<button class="delete-btn" data-id="' + e.id + '" style="position:static;display:inline-flex;vertical-align:middle;">✕</button>' +
                '</td>';
        } else {
            h += '<td><span class="trash-badge">🗑️ ' + timeAgo(e.deleted_at) + '</span></td>' +
                '<td class="actions-cell">' +
                    '<button class="restore-btn" onclick="restoreEntry(' + e.id + ')">↩️</button> ' +
                    '<button class="delete-btn" data-id="' + e.id + '" style="position:static;display:inline-flex;vertical-align:middle;">✕</button>' +
                '</td>';
        }
            h += '</tr>';
        });
        h += '</tbody></table>';
        c.innerHTML = h;
    } else {
        c.innerHTML = filtered.map(e => {
            if (view === 'grid') return gridC(e);
            if (view === 'compact') return compC(e);
            return listC(e);
        }).join('');
    }
    attachEvents();
    setupDrag();
}

function gridC(e) {
    const sel = selectedIds.has(e.id);
    let html = '<div class="entry-card' + (e.favorite ? ' favorite' : '') + (sel ? ' selected' : '') + '" draggable="true" data-id="' + e.id + '" onclick="toggleSelectEntry(' + e.id + ', event)">';
    html += '<div class="action-btns">';
    if (showTrash) {
        html += '<button class="restore-btn" onclick="restoreEntry(' + e.id + ')">↩️</button>';
        html += '<button class="delete-btn" data-id="' + e.id + '">✕</button>';
    } else {
        html += '<button class="star-btn" data-id="' + e.id + '">' + (e.favorite ? '⭐' : '☆') + '</button>';
        html += '<button class="edit-btn" data-id="' + e.id + '">✏️</button>';
        html += '<button class="delete-btn" data-id="' + e.id + '">✕</button>';
    }
    html += '</div>';
    html += '<div class="card-site">🌐 ' + highlightText(e.site, searchQuery) + '</div>';
    if (showMail) html += '<div class="card-user">👤 ' + highlightText(e.username, searchQuery) + '</div>';
    html += '<div class="card-folder">📁 ' + esc(e.folder || 'All') + '</div>';
    if (!showTrash) {
        html += '<div class="card-password"><span id="p-' + e.id + '" class="pw-display' + (showView ? ' pw-hover' : '') + '">••••••••</span><div>' +
            '<button class="icon-btn copy-p" data-id="' + e.id + '">📋</button></div></div>';
    } else {
        html += '<div class="trash-info">🗑️ ' + timeAgo(e.deleted_at) + '</div>';
    }
    html += '</div>';
    return html;
}
function listC(e) {
    const sel = selectedIds.has(e.id);
    let html = '<div class="entry-row' + (e.favorite ? ' favorite' : '') + (sel ? ' selected' : '') + '" draggable="true" data-id="' + e.id + '" onclick="toggleSelectEntry(' + e.id + ', event)">';
    html += '<div class="action-btns">';
    if (showTrash) {
        html += '<button class="restore-btn" onclick="restoreEntry(' + e.id + ')">↩️</button>';
        html += '<button class="delete-btn" data-id="' + e.id + '">✕</button>';
    } else {
        html += '<button class="star-btn" data-id="' + e.id + '">' + (e.favorite ? '⭐' : '☆') + '</button>';
        html += '<button class="edit-btn" data-id="' + e.id + '">✏️</button>';
        html += '<button class="delete-btn" data-id="' + e.id + '">✕</button>';
    }
    html += '</div>';
    html += '<div class="entry-info"><span class="entry-site">🌐 ' + highlightText(e.site, searchQuery) + '</span>';
    if (showMail) html += '<span class="entry-user">👤 ' + highlightText(e.username, searchQuery) + '</span>';
    if (!showTrash) {
        html += '<span class="entry-folder">📁 ' + esc(e.folder || 'All') + '</span>';
        html += '<div class="password-field"><span class="password-text pw-display' + (showView ? ' pw-hover' : '') + '" id="p-' + e.id + '">••••••••</span>' +
            '<button class="icon-btn copy-p" data-id="' + e.id + '">📋</button></div>';
    } else {
        html += '<span class="trash-badge">🗑️ ' + timeAgo(e.deleted_at) + '</span>';
    }
    html += '</div></div>';
    return html;
}
function compC(e) {
    const sel = selectedIds.has(e.id);
    let html = '<div class="entry-compact' + (e.favorite ? ' favorite' : '') + (sel ? ' selected' : '') + '" draggable="true" data-id="' + e.id + '" onclick="toggleSelectEntry(' + e.id + ', event)">';
    html += '<div class="action-btns">';
    if (showTrash) {
        html += '<button class="restore-btn" onclick="restoreEntry(' + e.id + ')">↩️</button>';
        html += '<button class="delete-btn" data-id="' + e.id + '">✕</button>';
    } else {
        html += '<button class="star-btn" data-id="' + e.id + '">' + (e.favorite ? '⭐' : '☆') + '</button>';
        html += '<button class="edit-btn" data-id="' + e.id + '">✏️</button>';
        html += '<button class="delete-btn" data-id="' + e.id + '">✕</button>';
    }
    html += '</div>';
    html += '<span>🌐 ' + highlightText(e.site, searchQuery) + '</span>';
    if (showMail) html += '<span>👤 ' + highlightText(e.username, searchQuery) + '</span>';
    if (!showTrash) {
        html += '<span class="entry-folder">📁 ' + esc(e.folder || 'All') + '</span>';
        html += '<span id="p-' + e.id + '" class="pw-display' + (showView ? ' pw-hover' : '') + '">••••••••</span>';
        html += '<button class="icon-btn copy-p" data-id="' + e.id + '">📋</button>';
    } else {
        html += '<span class="trash-badge">🗑️ ' + timeAgo(e.deleted_at) + '</span>';
    }
    html += '</div>';
    return html;
}

// ==================== EVENTS ====================
function showConfirm(btn, message, callback) {
    const id = btn.dataset.id;
    const existing = document.querySelector('.custom-confirm');
    if (existing) existing.remove();

    const confirm = document.createElement('div');
    confirm.className = 'custom-confirm show';
    confirm.innerHTML =
        '<div class="confirm-text">' + message + '</div>' +
        '<div class="confirm-btns">' +
            '<button class="confirm-yes">Yes</button>' +
            '<button class="confirm-no">No</button>' +
        '</div>';
    document.body.appendChild(confirm);

    const rect = btn.getBoundingClientRect();
    confirm.style.top = (rect.top - 60) + 'px';
    let leftPos = rect.left - confirm.offsetWidth + rect.width;
    if (leftPos < 10) leftPos = 10;
    confirm.style.left = leftPos + 'px';

    const yesBtn = confirm.querySelector('.confirm-yes');
    const noBtn = confirm.querySelector('.confirm-no');

    const cleanup = () => {
        confirm.remove();
        document.removeEventListener('keydown', keyHandler);
    };

    const keyHandler = (e) => {
        if (e.key === 'Enter' || e.key === 'y' || e.key === 'Y') {
            e.preventDefault();
            cleanup();
            callback(id);
            showZigzagToast(btn, '🗑️ Deleted!', 'error');
            playSound('delete');
        } else if (e.key === 'Escape' || e.key === 'n' || e.key === 'N') {
            e.preventDefault();
            cleanup();
        }
    };

    yesBtn.onclick = () => {
        cleanup();
        callback(id);
        showZigzagToast(btn, '🗑️ Deleted!', 'error');
        playSound('delete');
    };
    noBtn.onclick = () => cleanup();

    // Focus the confirm box so keyboard events are captured
    confirm.tabIndex = 0;
    confirm.focus();
    document.addEventListener('keydown', keyHandler);

    // Close if clicking outside
    setTimeout(() => {
        document.addEventListener('click', function closeConfirm(e) {
            if (!confirm.contains(e.target) && e.target !== btn) {
                cleanup();
                document.removeEventListener('click', closeConfirm);
            }
        });
    }, 10);
}
function entryPw(id) { const e = entries.find(x => x.id == id); return e ? e.password : ''; }
function attachEvents() {
    document.querySelectorAll('.delete-btn').forEach(b => b.onclick = function(ev) { ev.stopPropagation(); if (showTrash) { permanentDelete(this.dataset.id); } else { showConfirm(this, 'Delete this entry?', id => delEntry(id)); } });
    document.querySelectorAll('.edit-btn').forEach(b => b.onclick = function(ev) { ev.stopPropagation(); openEdit(this.dataset.id); });
    document.querySelectorAll('.star-btn').forEach(b => b.onclick = function(ev) { ev.stopPropagation(); toggleFavorite(this.dataset.id); });
    document.querySelectorAll('.copy-p').forEach(b => b.onclick = async function(ev) { ev.stopPropagation(); const pw = entryPw(this.dataset.id); try { await navigator.clipboard.writeText(pw); this.textContent = '✓'; const btn = this; setTimeout(() => { btn.textContent = '📋'; }, 1000); showZigzagToast(this, '📋 Copied!', 'success'); playSound('copy'); } catch (e) { showZigzagToast(this, 'Failed', 'error'); } });
    // Password reveal on hover
    if (showView) {
        document.querySelectorAll('.pw-display.pw-hover').forEach(el => {
            el.addEventListener('mouseenter', function() {
                const pw = entryPw(this.id.replace('p-', ''));
                this.textContent = pw;
            });
            el.addEventListener('mouseleave', function() {
                this.textContent = '••••••••';
            });
        });
    }
}
function setupDrag() {
    const c = document.getElementById('entriesContainer'); if (!c) return;
    c.querySelectorAll('[draggable="true"]').forEach(el => {
        el.ondragstart = function(e) { draggedId = this.dataset.id; const dragIds = selectedIds.has(parseInt(draggedId)) && selectedIds.size > 1 ? [...selectedIds] : [parseInt(draggedId)]; c.querySelectorAll('[draggable="true"]').forEach(card => { card.classList.toggle('drag-dim', dragIds.includes(parseInt(card.dataset.id))); }); e.dataTransfer.setData('text/plain', this.dataset.id); e.dataTransfer.effectAllowed = 'move'; if (dragIds.length > 1) { const cv = document.createElement('canvas'); cv.width = 100; cv.height = 50; const g = cv.getContext('2d'); for (let i = dragIds.length - 1; i >= 0; i--) { const ox = i * 4, oy = i * 4; g.fillStyle = i === 0 ? 'rgba(30,40,55,0.9)' : 'rgba(59,130,246,0.15)'; g.fillRect(ox, oy, 80, 36); g.strokeStyle = 'rgba(255,255,255,0.15)'; g.strokeRect(ox, oy, 80, 36); } g.fillStyle = 'rgba(0,0,0,0.7)'; g.fillRect(0, 34, 100, 16); g.fillStyle = '#fff'; g.font = '11px sans-serif'; g.textAlign = 'center'; g.fillText(dragIds.length + ' items', 50, 46); cv.style.position = 'fixed'; cv.style.top = '-1000px'; document.body.appendChild(cv); e.dataTransfer.setDragImage(cv, 6, 10); setTimeout(() => cv.remove(), 50); } };
        el.ondragend = function(e) { c.querySelectorAll('.drag-dim').forEach(card => card.classList.remove('drag-dim')); draggedId = null; c.querySelectorAll('.drag-over').forEach(x => x.classList.remove('drag-over')); document.getElementById('trashBtn')?.classList.remove('drag-over'); };
        el.ondragover = function(e) { e.preventDefault(); e.dataTransfer.dropEffect = 'move'; if (this.dataset.id !== draggedId) this.classList.add('drag-over'); };
        el.ondragleave = function(e) { this.classList.remove('drag-over'); };
        el.ondrop = function(e) { e.preventDefault(); e.stopPropagation(); this.classList.remove('drag-over'); const fromId = parseInt(e.dataTransfer.getData('text/plain')); const toId = parseInt(this.dataset.id); if (!fromId || !toId) return; const ids = selectedIds.has(fromId) && selectedIds.size > 1 ? [...selectedIds] : [fromId]; if (ids.length === 1 && ids[0] === toId) return; const base = order.length > 0 ? order : entries.filter(e => e).map(e => e.id); const filtered = base.filter(id => !ids.includes(id)); const idx = filtered.indexOf(toId); idx > -1 ? filtered.splice(idx, 0, ...ids) : filtered.push(...ids); order = filtered; localStorage.setItem('entryOrder', JSON.stringify(order)); const map = new Map(entries.filter(e => e).map(e => [e.id, e])); entries = order.map(id => map.get(id)).filter(e => e); entries.sort((a, b) => (b.favorite || 0) - (a.favorite || 0)); render(); };
    });
}

// ==================== EDIT ====================
function openEdit(id) {
    let e = null;
    for (let i = 0; i < entries.length; i++) { if (entries[i] && entries[i].id == id) { e = entries[i]; break; } }
    if (!e) return;
    const folderSelect = document.getElementById('editFolder');
    folderSelect.innerHTML = '';
    folders.forEach(f => {
        if (!f) return;
        const option = document.createElement('option');
        option.value = f;
        option.textContent = '📁 ' + f;
        if (f === (e.folder || 'All')) option.selected = true;
        folderSelect.appendChild(option);
    });
    document.getElementById('editId').value = id;
    document.getElementById('editSite').value = e.site;
    document.getElementById('editUsername').value = e.username;
    document.getElementById('editPassword').value = e.password;
    document.getElementById('editPassword').type = 'password';
    document.getElementById('editModal').classList.add('show');
    playSound('open');
}
function closeEdit() { document.getElementById('editModal').classList.remove('show'); playSound('close'); }
function toggleEditPassword() { const f = document.getElementById('editPassword'); f.type = f.type === 'password' ? 'text' : 'password'; }
async function saveEdit() {
    const id = document.getElementById('editId').value;
    const site = document.getElementById('editSite').value.trim();
    const username = document.getElementById('editUsername').value.trim();
    const password = document.getElementById('editPassword').value;
    const folder = document.getElementById('editFolder').value;
    if (!site || !password) { toast('Site and password required', 'error'); return; }
    try {
        const enc = await encryptPwd(password);
        const r = await fetch(API + '/entries/' + id, { method: 'PUT', headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken }, body: JSON.stringify({ site, username, encrypted_password: enc.encrypted, iv: enc.iv, folder }) });
        if (r.ok) { toast('✅ Updated!'); closeEdit(); loadEntries(); playSound('success'); }
        else { const d = await r.json(); toast('❌ ' + (d.error || 'Failed'), 'error'); }
    } catch (e) { toast('⚠️ Error', 'error'); }
}
//======================== batch selection ==========================
function toggleSelectEntry(id, e) {
    if (e?.shiftKey && lastSelectedId !== null) {
        const ids = getFilteredEntries().map(x => x.id);
        const i1 = ids.indexOf(lastSelectedId);
        const i2 = ids.indexOf(id);
        if (i1 > -1 && i2 > -1) {
            const start = Math.min(i1, i2), end = Math.max(i1, i2);
            for (let i = start; i <= end; i++) selectedIds.add(ids[i]);
        }
    } else if (e?.ctrlKey || e?.metaKey) {
        if (selectedIds.has(id)) selectedIds.delete(id); else selectedIds.add(id);
    } else {
        if (selectedIds.size === 1 && selectedIds.has(id)) { selectedIds.clear(); }
        else { selectedIds.clear(); selectedIds.add(id); }
    }
    lastSelectedId = id;
    updateBatchBar();
    render();
}

function clearSelection() {
    selectedIds.clear();
    lastSelectedId = null;
    hideBatchBar();
    render();
}

function updateBatchBar() {
    const existing = document.getElementById('batchBar');
    if (existing) existing.remove();
    if (selectedIds.size === 0) return;
    const bar = document.createElement('div');
    bar.id = 'batchBar';
    bar.className = 'batch-actions';
    bar.innerHTML = `<span class="selected-count">${selectedIds.size} selected</span>`;
    if (showTrash) {
        bar.innerHTML += `
            <button class="btn btn-sm restore-btn" onclick="batchRestore()">↩️ Restore All</button>
            <button class="btn btn-sm btn-danger" onclick="batchPermanentDelete()">🗑️ Delete</button>
        `;
    } else {
        bar.innerHTML += `
            <select id="batchFolder" style="font-size:0.75rem;padding:0.2rem 0.5rem;">
                ${folders.map(f => `<option value="${f}">📁 ${f}</option>`).join('')}
            </select>
            <button class="btn btn-sm" onclick="batchMove()">Move</button>
            <button class="btn btn-sm btn-danger" onclick="batchDelete()">Delete</button>
        `;
    }
    bar.innerHTML += `<button class="btn btn-sm btn-outline" onclick="clearSelection()">Clear</button>`;
    document.body.appendChild(bar);
}

function hideBatchBar() {
    const bar = document.getElementById('batchBar');
    if (bar) bar.remove();
}

async function batchDelete() {
    if (!confirm(`Move ${selectedIds.size} entries to trash?`)) return;
    for (const id of selectedIds) await delEntry(id);
    clearSelection();
}

async function batchPermanentDelete() {
    if (!confirm(`Permanently delete ${selectedIds.size} entries?`)) return;
    for (const id of selectedIds) await permanentDelete(id);
    clearSelection();
}

async function batchRestore() {
    for (const id of selectedIds) await restoreEntry(id);
    clearSelection();
}

async function batchMove() {
    const folder = document.getElementById('batchFolder')?.value || 'All';
    for (const id of selectedIds) {
        const e = entries.find(x => x.id == id);
        if (e) {
            e.folder = folder;
            const enc = await encryptPwd(e.password);
            await fetch(API + '/entries/' + id, {
                method: 'PUT',
                headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken },
                body: JSON.stringify({ site: e.site, username: e.username, encrypted_password: enc.encrypted, iv: enc.iv, folder })
            });
        }
    }
    clearSelection();
    loadEntries();
}
// ==================== ADD / DELETE ====================
async function addEntry() {
  const site = document.getElementById('addSite').value.trim();
  const user = document.getElementById('addUsername').value.trim();
  const pass = document.getElementById('addPassword').value;
  if (!site || !pass) { toast('❌ Site and password required', 'error'); return; }
  if (user) localStorage.setItem('savedUsername', user);
  const btn = document.getElementById('addEntryBtn');
  btn.disabled = true;
  try {
    const enc = await encryptPwd(pass);
    const folder = document.getElementById('addFolder').value;
    const r = await fetch(API + '/entries', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken },
      body: JSON.stringify({ site, username: user, encrypted_password: enc.encrypted, iv: enc.iv, encryption_method: 'client', folder })
    });
    if (r.ok) {
      closeAdd();
      toast('✅ Saved!');
      loadEntries();
      playSound('success');
    } else {
      const d = await r.json();
      toast('❌ ' + (d.error || 'Failed'), 'error');
    }
  } catch (e) { toast('⚠️ Error', 'error'); }
  finally { btn.disabled = false; }
}
async function delEntry(id) {
    try {
        const r = await fetch(API + '/entries/' + id, { method: 'DELETE', headers: { 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken } });
        if (r.ok) { selectedIds.delete(id); order = order.filter(x => x != id); localStorage.setItem('entryOrder', JSON.stringify(order)); toast('📦 Moved to trash'); await loadEntries(); playSound('delete'); }
    } catch (e) { toast('Error', 'error'); }
}

// ==================== UTILS ====================
function searchEntries() {
    const input = document.getElementById('searchInput');
    searchQuery = input.value.trim();
    const btn = document.getElementById('clearSearchBtn');
    if (btn) btn.style.display = searchQuery ? 'block' : 'none';
    loadEntries(searchQuery);
}
function showExportModal() {
    const overlay = document.createElement('div');
    overlay.className = 'custom-modal-overlay show';
    overlay.innerHTML = `<div class="custom-modal"><h3>📤 Export Passwords</h3><p style="color:var(--text2);margin-bottom:1rem;">Re-enter master password to export plaintext passwords</p><input type="password" id="exportPassword" placeholder="Master password" style="width:100%"><div class="modal-actions" style="margin-top:1rem"><button class="btn btn-outline btn-sm" id="cancelExport">Cancel</button><button class="btn btn-sm" id="confirmExport">Export</button></div></div>`;
    document.body.appendChild(overlay);
    document.getElementById('cancelExport').onclick = () => overlay.remove();
    document.getElementById('confirmExport').onclick = async () => {
        const pwd = document.getElementById('exportPassword').value;
        if (!pwd) { toast('Enter your master password', 'error'); return; }
        try {
            const r = await fetch(API + '/reauth', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json', 'Authorization': 'Bearer ' + token, 'X-CSRF-Token': csrfToken },
                body: JSON.stringify({ masterPassword: pwd })
            });
            if (r.ok) {
                overlay.remove();
                const b = new Blob([JSON.stringify(entries, null, 2)], { type: 'application/json' });
                const a = document.createElement('a');
                a.href = URL.createObjectURL(b);
                a.download = 'vault-' + new Date().toISOString().slice(0, 10) + '.json';
                a.click();
                URL.revokeObjectURL(a.href);
                toast('Exported!');
                playSound('success');
            } else {
                toast('❌ Invalid password', 'error');
            }
        } catch (e) { toast('⚠️ Error', 'error'); }
    };
    overlay.addEventListener('click', (e) => { if (e.target === overlay) overlay.remove(); });
    playSound('open');
}
function esc(t) { const d = document.createElement('div'); d.textContent = t; return d.innerHTML; }
function escRegex(s) { return s.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); }
function highlightText(text, query) {
    if (!query || !query.trim()) return esc(text);
    const re = new RegExp('(' + escRegex(query.trim()) + ')', 'gi');
    return esc(text).replace(re, '<mark style="background:var(--accent);color:#fff;border-radius:3px;padding:0 2px">$1</mark>');
}
function showShortcutsHelp() {
    const overlay = document.createElement('div');
    overlay.className = 'custom-modal-overlay show';
    overlay.innerHTML = `<div class="custom-modal" style="min-width:380px"><h3>⌨️ Keyboard Shortcuts</h3><div style="display:grid;grid-template-columns:auto 1fr;gap:0.5rem 1.2rem;font-size:0.85rem;margin-bottom:1rem"><span style="background:var(--input);padding:0.15rem 0.6rem;border-radius:0.4rem;font-family:monospace;text-align:center">Ctrl+N</span><span>New entry</span><span style="background:var(--input);padding:0.15rem 0.6rem;border-radius:0.4rem;font-family:monospace;text-align:center">Ctrl+F</span><span>Search</span><span style="background:var(--input);padding:0.15rem 0.6rem;border-radius:0.4rem;font-family:monospace;text-align:center">Ctrl+T</span><span>Toggle trash</span><span style="background:var(--input);padding:0.15rem 0.6rem;border-radius:0.4rem;font-family:monospace;text-align:center">Ctrl+L</span><span>Lock vault</span><span style="background:var(--input);padding:0.15rem 0.6rem;border-radius:0.4rem;font-family:monospace;text-align:center">Ctrl+S</span><span>Save entry</span><span style="background:var(--input);padding:0.15rem 0.6rem;border-radius:0.4rem;font-family:monospace;text-align:center">Esc</span><span>Close modal / deselect</span><span style="background:var(--input);padding:0.15rem 0.6rem;border-radius:0.4rem;font-family:monospace;text-align:center">?</span><span>Show this help</span></div><p style="color:var(--text2);font-size:0.8rem;margin-bottom:0.8rem">💡 Click any entry to select, Shift+click for range, Ctrl+click to toggle</p><div class="modal-actions"><button class="btn btn-sm" onclick="this.closest('.custom-modal-overlay').remove()">Got it</button></div></div>`;
    document.body.appendChild(overlay);
    overlay.addEventListener('click', e => { if (e.target === overlay) overlay.remove(); });
}
function clearSearch() {
    const input = document.getElementById('searchInput');
    input.value = '';
    searchQuery = '';
    const btn = document.getElementById('clearSearchBtn');
    if (btn) btn.style.display = 'none';
    loadEntries();
    input.focus();
}
// ==================== STARTUP – session persistence ====================
init();
applyTheme();

if (token && curUser) {
    (async () => {
        if (await restoreCryptoKey()) {
            await loadFolders();
            showVault();
            loadEntries();
        } else {
            sessionStorage.clear();
            token = null;
            curUser = null;
            document.getElementById('loginUsername').value = localStorage.getItem('savedLoginUser') || '';
        }
    })();
}

['click', 'keypress', 'scroll', 'mousemove'].forEach(e => document.addEventListener(e, () => { if (token) resetIdle(); }));
// Trash button as drop target (set up once, outside setupDrag to avoid duplicates)
(function() {
    const trashBtn = document.getElementById('trashBtn');
    if (trashBtn) {
        trashBtn.addEventListener('dragover', e => { if (!showTrash) { e.preventDefault(); trashBtn.classList.add('drag-over'); } });
        trashBtn.addEventListener('dragleave', () => trashBtn.classList.remove('drag-over'));
        trashBtn.addEventListener('drop', async function(e) {
            e.preventDefault();
            this.classList.remove('drag-over');
            const id = parseInt(e.dataTransfer.getData('text/plain'));
            if (!id) return;
            const ids = selectedIds.has(id) && selectedIds.size > 1 ? [...selectedIds] : [id];
            for (const sid of ids) await delEntry(sid);
            clearSelection();
        });
    }
})();

// Document mousedown: rect selection on vault background, clear outside vault
document.addEventListener('mousedown', function(e) {
    if (e.button !== 0 || rectState.active) return;
    if (e.target?.closest?.('.entry-card,.entry-row,.entry-compact,.table-row-drag,#batchBar,.custom-modal-overlay.show,.edit-modal.show,.modal-overlay.show,#genModal,#settingsMenu')) return;
    if (e.target?.closest?.('button,input,select,.folders-bar,.toolbar,#trashActions,.settings-dropdown,.fab,.view-toggle,.auth-section')) {
        if (selectedIds.size > 0) clearSelection();
        return;
    }
    if (e.target?.closest?.('.vault')) {
        rectState.active = true;
        rectState.startX = e.clientX;
        rectState.startY = e.clientY;
        rectState.started = false;
        rectState.el = null;
        selectedIds.clear();
        lastSelectedId = null;
        hideBatchBar();
        document.getElementById('entriesContainer')?.querySelectorAll('.selected').forEach(el => el.classList.remove('selected'));
    } else if (selectedIds.size > 0) {
        clearSelection();
    }
});
document.addEventListener('mousemove', function(e) {
    if (!rectState.active) return;
    const dx = e.clientX - rectState.startX;
    const dy = e.clientY - rectState.startY;
    if (!rectState.started && (dx > 5 || dx < -5 || dy > 5 || dy < -5)) {
        rectState.started = true;
        rectState.el = document.createElement('div');
        rectState.el.id = 'rectSelect';
        document.body.appendChild(rectState.el);
    }
    if (rectState.el) {
        const x = Math.min(rectState.startX, e.clientX);
        const y = Math.min(rectState.startY, e.clientY);
        const w = Math.abs(dx);
        const h = Math.abs(dy);
        rectState.el.style.cssText = `left:${x}px;top:${y}px;width:${w}px;height:${h}px;display:block;position:fixed;pointer-events:none;z-index:999;border:1px solid var(--accent);background:rgba(59,130,246,0.1);`;
    }
});
document.addEventListener('mouseup', function(e) {
    if (!rectState.active) return;
    rectState.active = false;
    if (rectState.el) {
        rectState.el.remove();
        rectState.el = null;
        if (rectState.started) {
            const r = {
                left: Math.min(rectState.startX, e.clientX),
                top: Math.min(rectState.startY, e.clientY),
                right: Math.max(rectState.startX, e.clientX),
                bottom: Math.max(rectState.startY, e.clientY)
            };
            const container = document.getElementById('entriesContainer');
            if (container) {
                container.querySelectorAll('.entry-card,.entry-row,.entry-compact,.table-row-drag').forEach(el => {
                    const er = el.getBoundingClientRect();
                    if (er.left < r.right && er.right > r.left && er.top < r.bottom && er.bottom > r.top) {
                        const id = parseInt(el.dataset.id);
                        if (id) selectedIds.add(id);
                    }
                });
            }
            if (selectedIds.size > 0) { updateBatchBar(); render(); }
        }
    }
});
document.addEventListener('keypress', e => { if (e.key === 'Enter') { if (document.getElementById('passwordInput') === document.activeElement) addEntry(); else if (document.getElementById('loginPassword') === document.activeElement) login(); else if (document.getElementById('regPassword') === document.activeElement) register(); } });
document.getElementById('genModal').addEventListener('click', e => { if (e.target === e.currentTarget) closeGen(); });
document.getElementById('editModal').addEventListener('click', e => { if (e.target === e.currentTarget) closeEdit(); });
// ==================== KEYBOARD SHORTCUTS ====================
document.addEventListener('keydown', function(e) {
    const tag = document.activeElement?.tagName;
    const isInput = tag === 'INPUT' || tag === 'TEXTAREA' || tag === 'SELECT';
    
    // Escape – close any open modal or settings
    if (e.key === 'Escape') {
        if (rectState.active || rectState.el) { rectState.active = false; if (rectState.el) { rectState.el.remove(); rectState.el = null; } clearSelection(); return; }
        if (selectedIds.size > 0) { clearSelection(); return; }
        if (!document.getElementById('settingsMenu').classList.contains('hidden')) {
            document.getElementById('settingsMenu').classList.add('hidden');
            return;
        }
        if (document.getElementById('addModal').classList.contains('show')) { closeAdd(); return; }
        if (document.getElementById('editModal').classList.contains('show')) { closeEdit(); return; }
        if (document.getElementById('genModal').style.display === 'flex') { closeGen(); return; }
        const confirm = document.querySelector('.custom-confirm.show');
        if (confirm) confirm.remove();
        return;
    }
    
    // ? or / to show shortcuts help (only in vault)
    if ((e.key === '?' || e.key === '/') && !isInput) {
        if (!document.getElementById('authSection').classList.contains('hidden')) return;
        e.preventDefault();
        showShortcutsHelp();
        return;
    }
    
    // Only handle Ctrl+[key], no Shift/Alt/Meta
    if (!e.ctrlKey || e.shiftKey || e.altKey || e.metaKey) return;
    
    // Prevent browser defaults for ALL our shortcuts BEFORE dispatching
    const code = e.code;
    if (code === 'KeyN' || code === 'KeyF' || code === 'KeyT' || code === 'KeyL' || code === 'KeyS') {
        e.preventDefault();
    }
    
    if (code === 'KeyN') {
        if (!isInput && !document.getElementById('addModal').classList.contains('show')) openAdd();
    } else if (code === 'KeyF') {
        const el = document.getElementById('searchInput');
        if (el) { el.focus(); el.select(); }
    } else if (code === 'KeyT') {
        if (!isInput) toggleTrash();
    } else if (code === 'KeyL') {
        if (!isInput) doLogout();
    } else if (code === 'KeyS') {
        if (document.getElementById('addModal').classList.contains('show')) addEntry();
        else if (document.getElementById('editModal').classList.contains('show')) saveEdit();
    }
});