/* ui.js — Helper tampilan: escape, format, badge, modal, toast, confirm */
(function (global) {
  'use strict';

  function escape(v) {
    if (v == null) return '';
    return String(v)
      .replace(/&/g, '&')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;')
      .replace(/'/g, '&#39;');
  }

  function formatDate(iso) {
    return global.WA ? global.WA.tanggalPanjang(iso) : (iso || '');
  }

  function formatDateTime(iso) {
    if (!iso) return '';
    var d = new Date(iso);
    if (isNaN(d.getTime())) return '';
    var jam = String(d.getHours()).padStart(2, '0') + ':' + String(d.getMinutes()).padStart(2, '0');
    return formatDate(iso) + ' ' + jam;
  }

  function formatBytes(bytes) {
    if (!bytes && bytes !== 0) return '';
    var units = ['B', 'KB', 'MB', 'GB'];
    var i = 0;
    var n = bytes;
    while (n >= 1024 && i < units.length - 1) { n /= 1024; i++; }
    return (i === 0 ? n : n.toFixed(1)) + ' ' + units[i];
  }

  function badge(status) {
    if (!status) return '';
    return '<span class="badge" style="background:' + escape(status.warna || '#64748b') + '">' +
      escape(status.nama) + '</span>';
  }

  function escapeAttr(v) { return escape(v); }

  /* ---------- Toast ---------- */
  function toastBox() {
    var box = document.getElementById('toastBox');
    if (!box) {
      box = document.createElement('div');
      box.id = 'toastBox';
      document.body.appendChild(box);
    }
    return box;
  }

  function toast(message, type) {
    var el = document.createElement('div');
    el.className = 'toast' + (type === 'ok' ? ' ok' : type === 'err' ? ' err' : '');
    el.textContent = message;
    toastBox().appendChild(el);
    setTimeout(function () {
      el.style.transition = 'opacity .25s';
      el.style.opacity = '0';
      setTimeout(function () { el.remove(); }, 260);
    }, 3200);
  }

  /* ---------- Modal ---------- */
  var modalEl = null;

  function ensureModal() {
    if (modalEl) return modalEl;
    modalEl = document.createElement('div');
    modalEl.className = 'modal-overlay';
    modalEl.innerHTML =
      '<div class="modal" role="dialog" aria-modal="true">' +
        '<div class="modal-head"><h3></h3><button class="modal-x" type="button" aria-label="Tutup">&times;</button></div>' +
        '<div class="modal-body"></div>' +
        '<div class="modal-foot"></div>' +
      '</div>';
    document.body.appendChild(modalEl);
    modalEl.addEventListener('click', function (e) {
      if (e.target === modalEl) closeModal();
    });
    modalEl.querySelector('.modal-x').addEventListener('click', closeModal);
    document.addEventListener('keydown', function (e) {
      if (e.key === 'Escape' && modalEl && modalEl.parentNode) closeModal();
    });
    return modalEl;
  }

  function openModal(opts) {
    var el = ensureModal();
    opts = opts || {};
    var modal = el.querySelector('.modal');
    modal.className = 'modal' + (opts.size === 'lg' ? ' lg' : '');
    el.querySelector('.modal-head h3').textContent = opts.title || '';
    el.querySelector('.modal-body').innerHTML = opts.body || '';
    el.querySelector('.modal-foot').innerHTML = opts.footer || '';
    el.querySelector('.modal-foot').style.display = opts.footer ? 'flex' : 'none';
    el.style.display = 'flex';
    if (typeof opts.onMount === 'function') opts.onMount(el);
    var firstInput = el.querySelector('.modal-body input, .modal-body select, .modal-body textarea');
    if (firstInput) setTimeout(function () { firstInput.focus(); }, 50);
    return el;
  }

  function closeModal() {
    if (modalEl) modalEl.style.display = 'none';
  }

  function isModalOpen() {
    return !!(modalEl && modalEl.style.display !== 'none');
  }

  function confirmDialog(message, title) {
    return global.confirm((title ? title + '\n\n' : '') + message);
  }

  /* ---------- Banner peringatan ---------- */
  function banner(message, type) {
    if (!document.body) return;
    var host = document.querySelector('main.container') || document.body;
    var existing = document.getElementById('appBanner');
    if (existing) existing.remove();
    var el = document.createElement('div');
    el.id = 'appBanner';
    var base = 'padding:10px 14px;border-radius:10px;margin-bottom:14px;font-size:13px;line-height:1.5;';
    if (type === 'warn') {
      el.style.cssText = base + 'background:#fffbeb;border:1px solid #fde68a;color:#92400e;';
    } else {
      el.style.cssText = base + 'background:#fef2f2;border:1px solid #fecaca;color:#991b1b;';
    }
    el.textContent = message;
    host.insertBefore(el, host.firstChild);
  }

  // Tampilkan error apa pun sebagai banner, bukan halaman kosong.
  global.addEventListener('error', function (e) {
    var msg = (e && (e.message || (e.error && e.error.message))) || 'Kesalahan tidak diketahui';
    try { banner('Terjadi kesalahan: ' + msg, 'err'); } catch (_) { /* abaikan */ }
  });
  global.addEventListener('unhandledrejection', function (e) {
    var r = e && e.reason;
    var msg = (r && (r.message || r)) || 'Operasi gagal';
    try { banner('Terjadi kesalahan: ' + msg, 'err'); } catch (_) { /* abaikan */ }
  });

  global.UI = {
    escape: escape, escapeAttr: escapeAttr, formatDate: formatDate, formatDateTime: formatDateTime,
    formatBytes: formatBytes, badge: badge, toast: toast, banner: banner,
    openModal: openModal, closeModal: closeModal, isModalOpen: isModalOpen,
    confirmDialog: confirmDialog
  };
})(window);