/**
 * Template-Rendering und Filterung.
 *
 * Rendert die Template-Karte und wendet Filter (Typ, Suche) an.
 */

let currentEditTemplate = null;

/**
 * Render Template-Karten in den Container
 * @param {Array} templates - Zu rendernde Templates
 */
function renderTemplates(templates) {
  const container = document.getElementById('templates');
  const count = document.getElementById('count');

  count.textContent = `${templates.length} Template(s)`;

  if (templates.length === 0) {
    container.innerHTML = '<div class="empty-state"><h3>Keine Templates gefunden</h3><p>Füge Templates in den templates/ Ordnern hinzu.</p></div>';
    return;
  }

  container.innerHTML = templates.map(t => `
    <div class="template-item">
      <h3>${esc(t.name)}</h3>
      <div class="meta">
        <span>🏷️ ${esc(t.type)}</span>
        <span>📄 ${esc(t.format)}</span>
        <span>📌 v${esc(t.version)}</span>
      </div>
      <p>${esc(t.description) || 'Keine Beschreibung'}</p>
      <div class="tags">
        ${t.tags.map(tag => `<span class="tag">${esc(tag)}</span>`).join('')}
      </div>
      <div class="actions">
        <button class="btn btn-icon btn-view" data-path="${t.path}" aria-label="Anzeigen: ${esc(t.name)}">Anzeigen</button>
        <button class="btn btn-icon btn-edit" data-path="${t.path}" aria-label="Bearbeiten: ${esc(t.name)}">📝 Bearbeiten</button>
        <button class="btn btn-icon btn-copy" data-path="${t.path}" aria-label="Inhalt kopieren: ${esc(t.name)}">Inhalt kopieren</button>
        <button class="btn btn-icon btn-tune" data-path="${t.path}" aria-label="Tunen: ${esc(t.name)}">🎯 Tunen</button>
      </div>
    </div>
  `).join('');
}

/**
 * Filter-State: aktueller Typ-Filter
 */
let currentType = null;
let currentQuery = '';

/**
 * Extrahiere Typ aus URL-Hash
 * @returns {string|null} Typ-Filter oder null
 */
function parseTypeFromHash() {
  const match = window.location.hash.match(/[?&]type=([^&]+)/);
  return match ? decodeURIComponent(match[1]) : null;
}

/**
 * Setze Nav-Active-State basierend auf Typ
 * @param {string|null} type - Typ-Filter
 */
function setNavActive(type) {
  document.querySelectorAll('.nav a').forEach(a => {
    const m = (a.getAttribute('href') || '').match(/type=([^&]+)/);
    const aType = m ? m[1] : null;
    a.classList.toggle('active', aType === type);
  });
}

/**
 * Wende Filter an und render Templates
 */
function applyFilters() {
  let list = window.allTemplates || [];
  if (currentType) {
    list = list.filter(t => t.type === currentType);
  }
  if (currentQuery) {
    const q = currentQuery;
    list = list.filter(t =>
      (t.name || '').toLowerCase().includes(q) ||
      (t.description || '').toLowerCase().includes(q) ||
      (t.tags || []).some(tag => tag.toLowerCase().includes(q))
    );
  }
  setNavActive(currentType);
  renderTemplates(list);
}

// Event delegation: click on template cards routes to action functions
document.addEventListener('click', (e) => {
  const btn = e.target.closest('.btn[data-path]');
  if (!btn) return;
  const card = btn.closest('.template-item');
  if (!card) return;
  const path = btn.dataset.path;
  const action = btn.classList.contains('btn-view') ? 'viewTemplate'
    : btn.classList.contains('btn-edit') ? 'editModalContent'
    : btn.classList.contains('btn-copy') ? 'copyContent'
    : btn.classList.contains('btn-tune') ? 'tuneModalContent' : null;
  if (action) window[action](path);
});

// Export for main.js (global scope, loaded before main.js)
// renderTemplates, applyFilters, parseTypeFromHash, setNavActive
// currentType, currentQuery sind als globale Variablen verfügbar