// ================================================================
//  AMS — Core Application Logic  |  app.js
// ================================================================

/* ── Active Nav ─────────────────────────────────────────────────── */
function setActiveNav() {
  const page = window.location.pathname.split('/').pop() || 'dashboard.html';
  document.querySelectorAll('.nav-item').forEach(el => {
    const href = el.getAttribute('href') || '';
    if (href && page === href) el.classList.add('active');
    else el.classList.remove('active');
  });
}

/* ── Modals ─────────────────────────────────────────────────────── */
function openModal(id) {
  const el = document.getElementById(id);
  if (el) { el.classList.add('open'); document.body.style.overflow = 'hidden'; }
}
function closeModal(id) {
  const el = document.getElementById(id);
  if (el) { el.classList.remove('open'); document.body.style.overflow = ''; }
}

/* ── Tabs ─────────────────────────────────────────────────────── */
function initTabs(container) {
  const root = container || document;
  root.querySelectorAll('.tab-btn').forEach(btn => {
    btn.addEventListener('click', () => {
      const tabsEl = btn.closest('.tabs');
      const tabGroup = tabsEl ? tabsEl.dataset.group : null;
      const targetId = btn.dataset.tab;
      tabsEl.querySelectorAll('.tab-btn').forEach(b => b.classList.remove('active'));
      btn.classList.add('active');
      const scope = btn.closest('.tab-container') || btn.closest('.card') || btn.closest('.content') || document;
      scope.querySelectorAll('.tab-content').forEach(tc => {
        if (tabGroup && tc.dataset.group && tc.dataset.group !== tabGroup) return;
        tc.classList.toggle('active', tc.id === targetId);
      });
    });
  });
}

/* ── Toast ─────────────────────────────────────────────────────── */
function showToast(title, text='', type='success', dur=4200) {
  const icons = { success:'✅', error:'❌', warning:'⚠️', info:'ℹ️' };
  const c = document.getElementById('toastContainer');
  if (!c) return;
  const t = document.createElement('div');
  t.className = `toast ${type}`;
  t.innerHTML = `<div class="toast-icon">${icons[type]}</div>
    <div class="toast-msg"><div class="toast-title">${title}</div>${text?`<div class="toast-text">${text}</div>`:''}</div>
    <button onclick="this.parentElement.remove()" style="background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:18px;padding:0 2px;margin-left:8px;line-height:1">×</button>`;
  c.appendChild(t);
  setTimeout(() => { t.style.opacity='0'; t.style.transform='translateX(30px)'; t.style.transition='all .3s ease'; setTimeout(()=>t.remove(),350); }, dur);
}

/* ── Table Search ─────────────────────────────────────────────── */
function initSearch(inputId, tableId) {
  const inp = document.getElementById(inputId);
  const tbl = document.getElementById(tableId);
  if (!inp || !tbl) return;
  inp.addEventListener('input', () => {
    const q = inp.value.toLowerCase().trim();
    let vis = 0;
    tbl.querySelectorAll('tbody tr').forEach(r => {
      const show = !q || r.textContent.toLowerCase().includes(q);
      r.style.display = show ? '' : 'none';
      if (show) vis++;
    });
    const cnt = document.getElementById(tableId + '-count');
    if (cnt) cnt.textContent = vis;
  });
}

/* ── Select Filter ─────────────────────────────────────────────── */
function initFilter(selId, tableId, colIdx) {
  const sel = document.getElementById(selId);
  const tbl = document.getElementById(tableId);
  if (!sel || !tbl) return;
  sel.addEventListener('change', () => {
    const v = sel.value.toLowerCase();
    tbl.querySelectorAll('tbody tr').forEach(r => {
      if (!v) { r.style.display = ''; return; }
      const cell = r.cells[colIdx];
      r.style.display = (cell && cell.textContent.toLowerCase().includes(v)) ? '' : 'none';
    });
  });
}

/* ── Bulk Checkboxes ─────────────────────────────────────────── */
function initCheckboxes(tableId, bulkBarId) {
  const tbl = document.getElementById(tableId);
  const bar = document.getElementById(bulkBarId);
  if (!tbl) return;
  const all = tbl.querySelector('.select-all');
  const rows = () => [...tbl.querySelectorAll('.row-check')];
  const updateBar = () => {
    if (!bar) return;
    const n = rows().filter(c => c.checked).length;
    bar.style.display = n > 0 ? 'flex' : 'none';
    const cnt = bar.querySelector('.bulk-count');
    if (cnt) cnt.textContent = `${n} item${n!==1?'s':''} selected`;
  };
  if (all) {
    all.addEventListener('change', () => {
      rows().forEach(c => { c.checked = all.checked; c.closest('tr').classList.toggle('row-selected', all.checked); });
      updateBar();
    });
  }
  rows().forEach(c => {
    c.addEventListener('change', () => {
      c.closest('tr').classList.toggle('row-selected', c.checked);
      if (all) all.checked = rows().every(r => r.checked);
      updateBar();
    });
  });
}

/* ── Confirm Dialog ─────────────────────────────────────────── */
function confirmAction(title, msg, cb, type='danger') {
  const m = document.getElementById('confirmModal');
  if (!m) { if (confirm(msg) && cb) cb(); return; }
  m.querySelector('.confirm-title').textContent = title;
  m.querySelector('.confirm-message').textContent = msg;
  const btn = m.querySelector('.confirm-ok');
  btn.onclick = () => { closeModal('confirmModal'); if (cb) cb(); };
  openModal('confirmModal');
}

/* ── Dropdowns ─────────────────────────────────────────────── */
function initDropdowns() {
  document.querySelectorAll('[data-dropdown]').forEach(trigger => {
    trigger.addEventListener('click', e => {
      e.stopPropagation();
      const menuId = trigger.dataset.dropdown;
      const menu = document.getElementById(menuId);
      if (!menu) return;
      document.querySelectorAll('.dropdown-menu.open').forEach(m => { if (m.id !== menuId) m.classList.remove('open'); });
      menu.classList.toggle('open');
    });
  });
  document.addEventListener('click', () => {
    document.querySelectorAll('.dropdown-menu.open').forEach(m => m.classList.remove('open'));
  });
}

/* ── Tree ─────────────────────────────────────────────────── */
function initTrees() {
  document.querySelectorAll('.tree-toggle').forEach(t => {
    t.addEventListener('click', () => {
      const ch = t.closest('.tree-node').querySelector('.tree-children');
      const ar = t.querySelector('.tree-arrow');
      if (ch) { ch.classList.toggle('open'); if (ar) ar.classList.toggle('open'); }
    });
  });
}

/* ── Notif Panel ─────────────────────────────────────────────── */
function initNotifPanel() {
  const bell = document.getElementById('notifBell');
  const panel = document.getElementById('notifPanel');
  if (bell && panel) {
    bell.addEventListener('click', e => { e.stopPropagation(); panel.classList.toggle('open'); });
    document.addEventListener('click', e => { if (!panel.contains(e.target) && e.target !== bell) panel.classList.remove('open'); });
  }
}

/* ── Sidebar User Info ─────────────────────────────────────── */
function populateSidebarUser() {
  if (!window.AMS) return;
  const u = AMS.currentUser;
  const nameEl = document.getElementById('sidebarUserName');
  const roleEl = document.getElementById('sidebarUserRole');
  const avEl   = document.getElementById('sidebarUserAv');
  if (nameEl) nameEl.textContent = u.name;
  if (roleEl) roleEl.textContent = u.role;
  if (avEl)   avEl.textContent   = u.avatar;
}

/* ── Topbar Notifications Badge ─────────────────────────────── */
function populateNotifBadge() {
  if (!window.AMS) return;
  const unread = AMS.notifications.filter(n => !n.read).length;
  const dot = document.querySelector('#notifBell .badge-dot');
  if (dot) dot.style.display = unread > 0 ? '' : 'none';
}

/* ── Render Notifications Panel ─────────────────────────────── */
function renderNotifPanel() {
  if (!window.AMS) return;
  const list = document.getElementById('notifList');
  if (!list) return;
  list.innerHTML = AMS.notifications.map(n => `
    <div class="notif-item" onclick="markNotifRead('${n.id}')">
      ${n.read ? '' : '<div class="notif-dot"></div>'}
      <div style="flex:1">
        <div class="notif-text">${n.text}</div>
        <div class="notif-time">${n.time}</div>
      </div>
    </div>`).join('');
}

function markNotifRead(id) {
  if (window.AMS) {
    const n = AMS.notifications.find(x => x.id === id);
    if (n) n.read = true;
    populateNotifBadge();
    renderNotifPanel();
  }
}

/* ── Pagination ─────────────────────────────────────────────── */
function renderPagination(containerId, total, perPage=10, current=1, onChange) {
  const c = document.getElementById(containerId);
  if (!c) return;
  const pages = Math.ceil(total / perPage);
  let html = `<button class="page-btn" onclick="(${onChange})(${Math.max(1,current-1)})" ${current===1?'disabled':''}>‹</button>`;
  for (let i=1;i<=pages;i++) {
    html += `<button class="page-btn${i===current?' active':''}" onclick="(${onChange})(${i})">${i}</button>`;
  }
  html += `<button class="page-btn" onclick="(${onChange})(${Math.min(pages,current+1)})" ${current===pages?'disabled':''}>›</button>`;
  c.innerHTML = html;
}

/* ── Download CSV ─────────────────────────────────────────── */
function downloadCSV(data, filename='export.csv') {
  if (!data.length) return;
  const headers = Object.keys(data[0]).join(',');
  const rows = data.map(r => Object.values(r).map(v => `"${String(v).replace(/"/g,'""')}"`).join(','));
  const csv = [headers, ...rows].join('\n');
  const a = document.createElement('a');
  a.href = URL.createObjectURL(new Blob([csv],{type:'text/csv'}));
  a.download = filename;
  a.click();
}

/* ── Generate QR SVG Pattern ───────────────────────────────── */
function generateQRPattern(seed) {
  // Deterministic pseudo-QR pattern based on seed string
  let hash = 0;
  for (let i=0; i<seed.length; i++) hash = (hash * 31 + seed.charCodeAt(i)) | 0;
  const rand = (n) => { hash = (hash * 1103515245 + 12345) | 0; return Math.abs(hash) % n; };
  const cells = [];
  for (let i=0;i<49;i++) cells.push(rand(2));
  // Force finder pattern corners
  const corners = [0,1,2,3,4,5,6,7,14,21,28,35,42,43,44,45,46,47,48];
  corners.forEach(i => cells[i] = i%7<1 || i%7>5 || Math.floor(i/7)<1 || Math.floor(i/7)>5 ? 1 : 0);
  return cells;
}

/* ── DOMContentLoaded Init ─────────────────────────────────── */
document.addEventListener('DOMContentLoaded', () => {
  setActiveNav();
  initTabs();
  initDropdowns();
  initTrees();
  initNotifPanel();
  populateSidebarUser();
  populateNotifBadge();
  renderNotifPanel();

  // Auto close modal on overlay click
  document.querySelectorAll('.modal-overlay').forEach(ov => {
    ov.addEventListener('click', e => { if (e.target === ov) { ov.classList.remove('open'); document.body.style.overflow = ''; } });
  });

  // Auto close modal on .modal-close
  document.querySelectorAll('.modal-close').forEach(btn => {
    btn.addEventListener('click', () => {
      const ov = btn.closest('.modal-overlay');
      if (ov) { ov.classList.remove('open'); document.body.style.overflow = ''; }
    });
  });
});