// 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() {
    const filtered = getFilteredProjects();
    const projects = getProjectsForPage(filtered, currentPage);

    portfolioGrid.innerHTML = projects.map(project => `
      <div class="portfolio-item reveal" data-project-id="${project.id}">
        <div class="portfolio-bg" style="background: ${project.gradient};"></div>
        <div class="portfolio-content">
          <span class="portfolio-tag">${getCategoryLabel(project.category)}</span>
          <h4>${project.title}</h4>
          <p>${project.desc.substring(0, 80)}...</p>
        </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() {
    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 : charger les images du dossier via convention de nommage
    // images/projects/{slug}/1.png, 2.png... avec fallback gradient
    const imgPath = project.images || '';
    const imgExtensions = ['png', 'jpg', 'jpeg', 'webp'];
    
    // On tente de charger jusqu'à 6 images numérotées depuis le dossier
    const maxImages = 6;
    let slidesHtml = '';
    
    // Toujours créer au moins 1 slide gradient (fallback)
    // Les images réelles se chargent avec onerror pour masquer si absentes
    for (let i = 1; i <= maxImages; i++) {
      slidesHtml += `
        <div class="project-gallery-slide" data-img-idx="${i}" style="background: ${project.gradient};">
          <img src="${imgPath}${i}.png" alt="${project.title} ${i}"
               class="gallery-slide-img"
               onerror="this.parentElement.classList.add('no-image')"
               onload="this.parentElement.classList.add('has-image')">
        </div>`;
    }
    gallerySlides.innerHTML = slidesHtml;

    // reset gallery state
    galleryIndex = 0;
    updateGallery();
    updateGalleryDots();

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

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

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

  // Gallery helpers
  let galleryIndex = 0;
  function getVisibleSlides() {
    if (!gallerySlides) return [];
    // Retourne uniquement les slides qui ont une image chargée OU qui sont la première (fallback gradient)
    const all = Array.from(gallerySlides.children);
    const withImg = all.filter(s => s.classList.contains('has-image'));
    return withImg.length > 0 ? withImg : [all[0]].filter(Boolean);
  }

  function updateGallery() {
    const visible = getVisibleSlides();
    const all = gallerySlides ? Array.from(gallerySlides.children) : [];
    // Cache toutes les slides non visibles
    all.forEach(s => {
      if (!visible.includes(s)) { s.style.display = 'none'; }
      else { s.style.display = ''; }
    });
    // Positionne les slides visibles
    visible.forEach((s, i) => {
      s.style.transform = `translateX(${(i - galleryIndex) * 100}%)`;
      s.classList.toggle('active', i === galleryIndex);
    });
    // Clamp index
    if (galleryIndex >= visible.length) galleryIndex = Math.max(0, visible.length - 1);
  }

  function updateGalleryDots() {
    const galleryDots = document.getElementById('gallery-dots');
    if (!galleryDots) return;
    // Attend que les images se chargent avant de créer les dots
    setTimeout(() => {
      const visible = getVisibleSlides();
      galleryDots.innerHTML = visible.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));
        });
      });
    }, 300);
  }

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

  // Event bindings
  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();
  }));

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

  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.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>' : '';

      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: ${p.gradient};">
            <div class="bento-image-content">
              <span class="portfolio-tag">${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();
});