/**
 * app.js — JavaScript global del sistema
 * Bootstrap para todos los módulos UI
 */

'use strict';

// ── Tema oscuro / claro ───────────────────────────────────────────────────────
const html     = document.documentElement;
const themeBtn = document.getElementById('themeToggle');
const themeIcon = document.getElementById('themeIcon');

function applyTheme(theme) {
  html.setAttribute('data-theme', theme);
  localStorage.setItem('theme', theme);
  if (themeIcon) {
    themeIcon.className = theme === 'dark' ? 'fa-solid fa-sun' : 'fa-solid fa-moon';
  }
  // Sincronizar con Chart.js si hay gráficos
  if (window.Chart) {
    Chart.defaults.color = theme === 'dark' ? '#94a3b8' : '#64748b';
    Chart.defaults.borderColor = theme === 'dark' ? '#334155' : '#e2e8f0';
  }
}

// Cargar tema al iniciar
const savedTheme = localStorage.getItem('theme') || html.getAttribute('data-theme') || 'light';
applyTheme(savedTheme);

if (themeBtn) {
  themeBtn.addEventListener('click', () => {
    const current = html.getAttribute('data-theme');
    applyTheme(current === 'dark' ? 'light' : 'dark');
    // Guardar en servidor vía AJAX
    fetch('?action=set_theme&theme=' + html.getAttribute('data-theme'), { method: 'POST' }).catch(() => {});
  });
}

// ── Sidebar toggle (móvil) ────────────────────────────────────────────────────
const sidebar     = document.getElementById('sidebar');
const sidebarBtn  = document.getElementById('sidebarToggle');
const overlay     = document.getElementById('sidebarOverlay');

if (sidebarBtn && sidebar) {
  sidebarBtn.addEventListener('click', () => {
    sidebar.classList.toggle('open');
  });
}

// Click fuera para cerrar sidebar en móvil
document.addEventListener('click', (e) => {
  if (window.innerWidth < 768 && sidebar && !sidebar.contains(e.target) && e.target !== sidebarBtn) {
    sidebar.classList.remove('open');
  }
});

// ── Notificaciones dropdown ───────────────────────────────────────────────────
const notifBtn      = document.getElementById('notifToggle');
const notifDropdown = document.getElementById('notifDropdown');

if (notifBtn && notifDropdown) {
  notifBtn.addEventListener('click', (e) => {
    e.stopPropagation();
    notifDropdown.classList.toggle('show');
  });
  document.addEventListener('click', () => {
    notifDropdown.classList.remove('show');
  });
}

// ── Búsqueda global ───────────────────────────────────────────────────────────
const searchToggle = document.getElementById('toggleSearch');
const searchWrap   = document.getElementById('globalSearchWrap');
const searchInput  = document.getElementById('globalSearch');

if (searchToggle && searchWrap) {
  searchToggle.addEventListener('click', () => {
    const isVisible = searchWrap.style.display !== 'none';
    searchWrap.style.display = isVisible ? 'none' : 'flex';
    if (!isVisible) searchInput.focus();
  });

  searchInput && searchInput.addEventListener('keydown', (e) => {
    if (e.key === 'Enter') {
      const q = searchInput.value.trim();
      if (q) {
        window.location.href = (window.appUrl || '') + '/views/oficios/lista.php?busqueda=' + encodeURIComponent(q);
      }
    }
    if (e.key === 'Escape') {
      searchWrap.style.display = 'none';
    }
  });
}

// ── Tabs ──────────────────────────────────────────────────────────────────────
document.querySelectorAll('.tab-btn').forEach(btn => {
  btn.addEventListener('click', function() {
    const container = this.closest('[data-tabs]') || document.body;
    container.querySelectorAll('.tab-btn').forEach(b => b.classList.remove('active'));
    container.querySelectorAll('.tab-content').forEach(c => c.classList.remove('active'));
    this.classList.add('active');
    const target = document.getElementById(this.dataset.tab);
    if (target) target.classList.add('active');
  });
});

// ── Modales ───────────────────────────────────────────────────────────────────
document.querySelectorAll('[data-modal]').forEach(btn => {
  btn.addEventListener('click', function() {
    const modal = document.getElementById(this.dataset.modal);
    if (modal) modal.classList.add('show');
  });
});

document.querySelectorAll('[data-modal-close]').forEach(btn => {
  btn.addEventListener('click', function() {
    this.closest('.modal-overlay').classList.remove('show');
  });
});

document.querySelectorAll('.modal-overlay').forEach(overlay => {
  overlay.addEventListener('click', function(e) {
    if (e.target === this) this.classList.remove('show');
  });
});

// ── Toast notifications ───────────────────────────────────────────────────────
function showToast(message, type = 'success', duration = 4000) {
  const container = document.getElementById('toastContainer');
  if (!container) return;

  const toast = document.createElement('div');
  toast.className = `toast ${type}`;
  const icons = { success: 'fa-check-circle', error: 'fa-circle-xmark', warn: 'fa-triangle-exclamation' };
  const colors = { success: '#10b981', error: '#ef4444', warn: '#f59e0b' };
  toast.innerHTML = `
    <i class="fa-solid ${icons[type] || icons.success}" style="color:${colors[type]};font-size:1.1rem;flex-shrink:0"></i>
    <span style="flex:1">${message}</span>
    <button onclick="this.parentElement.remove()" style="background:none;border:none;cursor:pointer;color:var(--text-muted);font-size:.9rem">
      <i class="fa-solid fa-xmark"></i>
    </button>
  `;
  container.appendChild(toast);
  setTimeout(() => toast.remove(), duration);
}

// Leer flash messages desde la URL
const urlParams = new URLSearchParams(window.location.search);
if (urlParams.get('success')) showToast(decodeURIComponent(urlParams.get('success')));
if (urlParams.get('error'))   showToast(decodeURIComponent(urlParams.get('error')), 'error');

// ── Confirmación de eliminación ───────────────────────────────────────────────
document.querySelectorAll('[data-confirm]').forEach(el => {
  el.addEventListener('click', function(e) {
    if (!confirm(this.dataset.confirm || '¿Confirma esta acción?')) {
      e.preventDefault();
    }
  });
});

// ── DataTables globales ───────────────────────────────────────────────────────
function initDataTable(selector, opts = {}) {
  if (typeof $ === 'undefined' || !$.fn.DataTable) return;
  const defaults = {
    language: {
      url: 'https://cdn.datatables.net/plug-ins/1.13.8/i18n/es-ES.json'
    },
    responsive: true,
    pageLength: 25,
    order: [],
  };
  return $(selector).DataTable({ ...defaults, ...opts });
}

// ── Dropzone ──────────────────────────────────────────────────────────────────
document.querySelectorAll('.dropzone').forEach(zone => {
  const input = zone.querySelector('input[type="file"]');
  zone.addEventListener('dragover', e => { e.preventDefault(); zone.classList.add('dragover'); });
  zone.addEventListener('dragleave', () => zone.classList.remove('dragover'));
  zone.addEventListener('drop', e => {
    e.preventDefault();
    zone.classList.remove('dragover');
    if (input && e.dataTransfer.files.length) {
      input.files = e.dataTransfer.files;
      zone.querySelector('.dropzone-label') && (zone.querySelector('.dropzone-label').textContent = `${e.dataTransfer.files.length} archivo(s) seleccionado(s)`);
    }
  });
  zone.addEventListener('click', () => input && input.click());
});

// ── Autocompletar número de oficio ────────────────────────────────────────────
const tipoSelect = document.getElementById('tipo');
const numOficio  = document.getElementById('numero_oficio');
const autoGenBtn = document.getElementById('autoGenNumero');

if (tipoSelect && autoGenBtn) {
  autoGenBtn.addEventListener('click', () => {
    const tipo = tipoSelect.value;
    fetch(`${window.appUrl}/api/oficios.php?action=gen_numero&tipo=${tipo}`)
      .then(r => r.json())
      .then(d => { if (numOficio && d.numero) numOficio.value = d.numero; });
  });
}

// ── Contador de caracteres en textarea ───────────────────────────────────────
document.querySelectorAll('textarea[data-maxlen]').forEach(ta => {
  const max = parseInt(ta.dataset.maxlen);
  const counter = document.createElement('div');
  counter.className = 'form-text text-end';
  counter.style.marginTop = '.25rem';
  ta.parentNode.insertBefore(counter, ta.nextSibling);
  const update = () => counter.textContent = `${ta.value.length} / ${max}`;
  ta.addEventListener('input', update);
  update();
});