// Page script for /pages/realisations.html et index.html

document.addEventListener('DOMContentLoaded', async () => {
  // Fonctionne depuis /pages/ et depuis / (index.html)
  const isRoot = !window.location.pathname.includes('/pages/');
  const dataUrl = isRoot ? 'assets/data/projects.json' : '../assets/data/projects.json';
  let allProjects = [];

  try {
    const res = await fetch(dataUrl);
    if (!res.ok) throw new Error(res.statusText);
    allProjects = await res.json();
  } catch (err) {
    console.error('Failed to load projects data:', err);
    return;
  }

  const ITEMS_PER_PAGE = 9;
  let currentPage = 1;
  let currentFilter = 'all';

  const portfolioGrid = document.getElementById('portfolio-grid');
  const paginationContainer = document.getElementById('pagination');
  const filterTabs = document.querySelectorAll('.filter-tab');

  const modalOverlay = document.getElementById('project-modal-overlay');
  const modalClose = document.getElementById('project-modal-close');
  const gallerySlides = document.getElementById('gallery-slides');
  const galleryPrev = document.getElementById('gallery-prev');
  const galleryNext = document.getElementById('gallery-next');

  const modalTitle = document.getElementById('modal-title');
  const modalCategory = document.getElementById('modal-category');
  const modalDesc = document.getElementById('modal-desc');
  const modalMeta = document.getElementById('modal-meta');
  const modalFeatures = document.getElementById('modal-features');
  const modalTech = document.getElementById('modal-tech');
  const modalStats = document.getElementById('modal-stats');

  function getFilteredProjects() {
    if (currentFilter === 'all') return [...allProjects];
    return allProjects.filter(p => p.category === currentFilter);
  }

  function getTotalPages(filtered) {
    return Math.ceil(filtered.length / ITEMS_PER_PAGE) || 1;
  }

  function getProjectsForPage(filtered, page) {
    const start = (page - 1) * ITEMS_PER_PAGE;
    return filtered.slice(start, start + ITEMS_PER_PAGE);
  }

  function getCategoryLabel(category) {
    const labels = { 'bot': 'Bot Discord', 'map': 'Fortnite Map', 'graphisme': 'Graphisme' };
    return labels[category] || category;
  }

  function renderProjects() {
    if (!portfolioGrid) return; // pas sur la page réalisations
    const filtered = getFilteredProjects();
    const projects = getProjectsForPage(filtered, currentPage);

    portfolioGrid.innerHTML = projects.map(project => {
      const prefix = isRoot ? '' : '../';
      const firstFile = Array.isArray(project.files) && project.files.length > 0 ? project.files[0] : null;
      const coverImg = firstFile ? `<img src="${prefix}${project.images}${firstFile}" alt="${project.title}" class="portfolio-cover-img" onerror="this.style.display='none'">` : '';
      return `
        <div class="portfolio-item reveal" data-project-id="${project.id}">
          <div class="portfolio-bg" style="background: ${project.gradient};">${coverImg}</div>
          <div class="portfolio-content">
            <span class="portfolio-tag">${getCategoryLabel(project.category)}</span>
            <h4>${project.title}</h4>
          </div>
        </div>
      `;
    }).join('');

    // activate reveals & icons
    setTimeout(() => {
      document.querySelectorAll('.portfolio-item.reveal').forEach(el => el.classList.add('active'));
    }, 80);

    // ensure icons are replaced for newly injected content
    if (window.feather && feather.replace) {
      try { feather.replace(); } catch (e) {}
    }
  }

  function renderPagination() {
    if (!paginationContainer) return; // pas sur la page réalisations
    const filtered = getFilteredProjects();
    const totalPages = getTotalPages(filtered);

    if (totalPages <= 1) {
      paginationContainer.innerHTML = '';
      return;
    }

    let html = `<button class="pagination-btn pagination-arrow" data-page="${Math.max(1, currentPage - 1)}" ${currentPage === 1 ? 'disabled' : ''}><i data-feather="chevron-left"></i></button>`;

    const maxVisible = 5;
    let startPage = Math.max(1, currentPage - Math.floor(maxVisible / 2));
    let endPage = Math.min(totalPages, startPage + maxVisible - 1);
    if (endPage - startPage < maxVisible - 1) startPage = Math.max(1, endPage - maxVisible + 1);

    if (startPage > 1) {
      html += `<button class="pagination-btn" data-page="1">1</button>`;
      if (startPage > 2) html += `<span class="pagination-ellipsis">...</span>`;
    }

    for (let i = startPage; i <= endPage; i++) {
      html += `<button class="pagination-btn ${i === currentPage ? 'active' : ''}" data-page="${i}">${i}</button>`;
    }

    if (endPage < totalPages) {
      if (endPage < totalPages - 1) html += `<span class="pagination-ellipsis">...</span>`;
      html += `<button class="pagination-btn" data-page="${totalPages}">${totalPages}</button>`;
    }

    html += `<button class="pagination-btn pagination-arrow" data-page="${Math.min(totalPages, currentPage + 1)}" ${currentPage === totalPages ? 'disabled' : ''}><i data-feather="chevron-right"></i></button>`;

    const startItem = (currentPage - 1) * ITEMS_PER_PAGE + 1;
    const endItem = Math.min(currentPage * ITEMS_PER_PAGE, filtered.length);
    html += `<div class="pagination-info">Affichage ${startItem}-${endItem} sur ${filtered.length} projets</div>`;

    paginationContainer.innerHTML = html;

    if (window.feather && feather.replace) {
      try { feather.replace(); } catch (e) {}
    }
  }

  function goToPage(page) {
    const filtered = getFilteredProjects();
    const totalPages = getTotalPages(filtered);
    if (page < 1 || page > totalPages) return;
    currentPage = page;
    renderProjects();
    renderPagination();
    portfolioGrid.scrollIntoView({ behavior: 'smooth', block: 'start' });
  }

  // ── Modal tab switching ──────────────────────────────────────────────────────
  const modalTabs = document.querySelectorAll('.project-modal-tab');
  modalTabs.forEach(tab => {
    tab.addEventListener('click', () => {
      const tabId = tab.dataset.tab;
      modalTabs.forEach(t => t.classList.remove('active'));
      tab.classList.add('active');
      document.querySelectorAll('.project-modal-tab-content').forEach(c => {
        c.classList.toggle('active', c.id === 'tab-' + tabId);
      });
    });
  });

  function resetModalTabs() {
    modalTabs.forEach((t, i) => t.classList.toggle('active', i === 0));
    document.querySelectorAll('.project-modal-tab-content').forEach((c, i) => c.classList.toggle('active', i === 0));
  }

  function openProjectModal(projectId) {
    const project = allProjects.find(p => p.id === Number(projectId));
    if (!project) return;

    resetModalTabs();

    modalCategory.textContent = getCategoryLabel(project.category);
    modalTitle.textContent = project.title;
    modalDesc.textContent = project.desc;

    modalMeta.innerHTML = `<span><i data-feather="calendar"></i> ${project.year}</span>${project.duration ? ` <span><i data-feather="clock"></i> ${project.duration}</span>` : ''}`;

    modalFeatures.innerHTML = project.features.map(f => `<div class="project-feature-item">${f}</div>`).join('');

    // Tech avec icônes (support ancien format string et nouveau format {name, icon})
    modalTech.innerHTML = project.tech.map(t => {
      const name = typeof t === 'object' ? t.name : t;
      const icon = typeof t === 'object' ? (t.icon || 'code') : 'code';
      return `<div class="project-tech-item"><i data-feather="${icon}"></i>${name}</div>`;
    }).join('');

    // Stats en grille 2×2 avec icônes
    modalStats.innerHTML = project.stats.map(s => `
      <div class="project-stat-card">
        <div class="project-stat-card-icon"><i data-feather="${s.icon || 'star'}"></i></div>
        <div class="project-stat-card-value">${s.value}</div>
        <div class="project-stat-card-label">${s.label}</div>
      </div>
    `).join('');

    // Gallery : utilise project.files (noms réels) avec fallback gradient si vide
    const imgPath = (isRoot ? '' : '../') + (project.images || '');
    const files   = Array.isArray(project.files) ? project.files : [];

    if (files.length > 0) {
      // Images réelles nommées explicitement dans le JSON
      // Supporte : fichier local, mp4 local, URL YouTube, shortcode yt:VIDEO_ID
      gallerySlides.innerHTML = files.map((filename, i) => {
        const isLocalVideo = /\.(mp4|webm|ogg)$/i.test(filename);

        // Détecte YouTube : URL complète ou shortcode yt:ID
        const ytMatch = filename.match(/(?:yt:|youtube\.com\/watch\?v=|youtu\.be\/)([\w-]+)/);

        if (ytMatch) {
          const videoId = ytMatch[1];
          return `
            <div class="project-gallery-slide slide-right gallery-slide-youtube" data-img-idx="${i}" style="background:${project.gradient};">
              <div class="yt-wrapper">
                <iframe
                  src="https://www.youtube.com/embed/${videoId}?rel=0&modestbranding=1"
                  allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
                  allowfullscreen
                  class="gallery-slide-yt-iframe"
                  title="Vidéo YouTube ${project.title}"
                  loading="lazy">
                </iframe>
              </div>
            </div>`;
        }

        if (isLocalVideo) {
          return `
            <div class="project-gallery-slide slide-right" data-img-idx="${i}" style="background:${project.gradient};">
              <video class="gallery-slide-img gallery-video" src="${imgPath}${filename}" muted loop autoplay playsinline></video>
              <button class="gallery-mute-btn" aria-label="Activer le son" title="Activer le son" onclick="(function(btn){var v=btn.closest('.project-gallery-slide').querySelector('video');v.muted=!v.muted;btn.classList.toggle('unmuted',!v.muted);btn.setAttribute('aria-label',v.muted?'Activer le son':'Couper le son');})(this)">
                <svg class="icon-muted" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" width="18" height="18"><polygon points="11 5 6 9 2 9 2 15 6 15 11 19 11 5"/><line x1="23" y1="9" x2="17" y2="15"/><line x1="17" y1="9" x2="23" y2="15"/></svg>
                <svg class="icon-unmuted" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" width="18" height="18"><polygon points="11 5 6 9 2 9 2 15 6 15 11 19 11 5"/><path d="M19.07 4.93a10 10 0 0 1 0 14.14"/><path d="M15.54 8.46a5 5 0 0 1 0 7.07"/></svg>
              </button>
            </div>`;
        }

        return `
          <div class="project-gallery-slide slide-right" data-img-idx="${i}" style="background:${project.gradient};">
            <img src="${imgPath}${filename}" alt="${project.title} ${i + 1}"
                 class="gallery-slide-img"
                 onerror="this.parentElement.classList.add('no-image');this.style.display='none'">
          </div>`;
      }).join('');
    } else {
      // Fallback : une slide gradient unique
      gallerySlides.innerHTML = `
        <div class="project-gallery-slide has-image" style="background:${project.gradient};"></div>`;
    }

    // reset gallery + affichage immédiat
    galleryIndex = 0;
    updateGallery();
    updateGalleryDots();

    if (modalOverlay) modalOverlay.classList.add('active');

    // Réseaux sociaux du projet
    const projectSocialEl = document.getElementById('modal-project-social');
    if (projectSocialEl) {
      projectSocialEl.innerHTML = typeof window.renderSocialLinks === 'function'
        ? window.renderSocialLinks(project.social)
        : '';
    }

    if (window.feather && feather.replace) {
      try { feather.replace(); } catch (e) {}
    }
  }

  function closeProjectModal() {
    if (modalOverlay) modalOverlay.classList.remove('active');
  }

  // Gallery helpers
  let galleryIndex = 0;
  function getAllSlides() {
    if (!gallerySlides) return [];
    return Array.from(gallerySlides.children).filter(s => !s.classList.contains('no-image'));
  }

  function updateGallery() {
    const slides = getAllSlides();
    if (!slides.length) return;
    if (galleryIndex >= slides.length) galleryIndex = 0;
    if (galleryIndex < 0) galleryIndex = slides.length - 1;
    slides.forEach((s, i) => {
      // Le CSS gère tout via .active — on ne touche JAMAIS à style.transform
      s.classList.toggle('active', i === galleryIndex);
      // Juste la direction (gauche/droite) via une classe data
      if (i < galleryIndex) {
        s.classList.add('slide-left');
        s.classList.remove('slide-right');
      } else if (i > galleryIndex) {
        s.classList.add('slide-right');
        s.classList.remove('slide-left');
      } else {
        s.classList.remove('slide-left', 'slide-right');
      }
    });
  }

  function updateGalleryDots() {
    const galleryDots = document.getElementById('gallery-dots');
    if (!galleryDots) return;
    const slides = getAllSlides();
    galleryDots.innerHTML = slides.map((_, i) =>
      `<div class="gallery-dot${i === 0 ? ' active' : ''}" data-idx="${i}"></div>`
    ).join('');
    galleryDots.querySelectorAll('.gallery-dot').forEach(dot => {
      dot.addEventListener('click', () => {
        galleryIndex = parseInt(dot.dataset.idx);
        updateGallery();
        galleryDots.querySelectorAll('.gallery-dot').forEach((d, i) =>
          d.classList.toggle('active', i === galleryIndex));
      });
    });
  }

  function syncDots() {
    const galleryDots = document.getElementById('gallery-dots');
    if (!galleryDots) return;
    galleryDots.querySelectorAll('.gallery-dot').forEach((d, i) =>
      d.classList.toggle('active', i === galleryIndex));
  }

  function prevSlide() {
    galleryIndex = galleryIndex <= 0 ? getAllSlides().length - 1 : galleryIndex - 1;
    updateGallery();
    syncDots();
  }
  function nextSlide() {
    galleryIndex = galleryIndex >= getAllSlides().length - 1 ? 0 : galleryIndex + 1;
    updateGallery();
    syncDots();
  }

  // Event bindings — uniquement sur la page réalisations
  if (filterTabs.length) {
    filterTabs.forEach(tab => tab.addEventListener('click', (e) => {
      filterTabs.forEach(t => t.classList.remove('active'));
      tab.classList.add('active');
      currentFilter = tab.dataset.filter || 'all';
      currentPage = 1;
      renderProjects();
      renderPagination();
    }));
  }

  if (paginationContainer) {
    paginationContainer.addEventListener('click', (e) => {
      const btn = e.target.closest('button[data-page]');
      if (!btn) return;
      const page = Number(btn.getAttribute('data-page'));
      goToPage(page);
    });
  }

  if (portfolioGrid) {
    portfolioGrid.addEventListener('click', (e) => {
      const item = e.target.closest('.portfolio-item');
      if (!item) return;
      const id = item.getAttribute('data-project-id');
      openProjectModal(id);
    });
  }

  if (modalClose) modalClose.addEventListener('click', closeProjectModal);
  if (modalOverlay) modalOverlay.addEventListener('click', (e) => { if (e.target === modalOverlay) closeProjectModal(); });
  window.addEventListener('keydown', (e) => { if (e.key === 'Escape' && modalOverlay && modalOverlay.classList.contains('active')) closeProjectModal(); });

  if (galleryPrev) galleryPrev.addEventListener('click', prevSlide);
  if (galleryNext) galleryNext.addEventListener('click', nextSlide);

  // Expose for compatibility
  window.openProjectModal = openProjectModal;
  window.goToPage = goToPage;

  // ── Projets phares (bento grid) — 3 premiers projets du JSON ───────────────
  const featuredBento = document.getElementById('featured-bento-grid');
  if (featuredBento) {
    const featured = allProjects.slice(0, 3);
    const categoryLabels = { bot: 'Bot Discord', map: 'Fortnite Map', graphisme: 'Graphisme' };

    featuredBento.innerHTML = featured.map((p, i) => {
      const isReverse = i % 2 === 1 ? ' reverse' : '';
      const statsHtml = (p.stats || []).slice(0, 4).map((s) => `
        <div class="bento-stat">
          <div class="bento-stat-icon"><i data-feather="${s.icon || 'star'}"></i></div>
          <div class="bento-stat-value">${s.value}</div>
          <div class="bento-stat-label">${s.label}</div>
        </div>
      `).join('');
      const featuresHtml = (p.features || []).slice(0, 6).map(f => `<span class="bento-feature">${f}</span>`).join('');
      const divider = i < featured.length - 1 ? '<div class="bento-divider"></div>' : '';

      const prefix = isRoot ? '' : '../';
      const firstFile = Array.isArray(p.files) && p.files.length > 0 ? p.files[0] : null;
      const bentoCover = firstFile
        ? `<img src="${prefix}${p.images}${firstFile}" alt="${p.title}" class="bento-cover-img" onerror="this.style.display='none'">`
        : '';

      return `
        <div class="bento-project${isReverse} reveal" data-project-id="${p.id}" style="cursor:pointer;" role="button" tabindex="0" aria-label="Voir le projet ${p.title}">
          <div class="bento-image" style="background: ${p.gradient};">
            ${bentoCover}
            <div class="bento-image-content">
              <span class="portfolio-tag">${categoryLabels[p.category] || p.category}</span>
              <h3>${p.title}</h3>
              <p>${p.desc.substring(0, 100)}${p.desc.length > 100 ? '…' : ''}</p>
            </div>
          </div>
          <div class="bento-stats">${statsHtml}</div>
          <div class="bento-info">
            <h4>Description</h4>
            <p>${p.desc}</p>
            <div class="bento-features">${featuresHtml}</div>
          </div>
        </div>
        ${divider}
      `;
    }).join('');

    // Replace feather icons
    if (window.feather && feather.replace) { try { feather.replace(); } catch(e) {} }

    // Click to open modal
    featuredBento.querySelectorAll('.bento-project').forEach(el => {
      const open = () => openProjectModal(el.getAttribute('data-project-id'));
      el.addEventListener('click', open);
      el.addEventListener('keydown', e => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); open(); } });
    });

    // Reveal animation
    setTimeout(() => {
      featuredBento.querySelectorAll('.reveal').forEach(el => el.classList.add('active'));
    }, 80);
  }

  // Initial render
  renderProjects();
  renderPagination();
});