// Page script for /pages/realisations.html

document.addEventListener('DOMContentLoaded', async () => {
  const dataUrl = '../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' });
  }

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

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

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

    modalFeatures.innerHTML = project.features.map(f => `<div class="project-feature-item">${f}</div>`).join('');
    modalTech.innerHTML = project.tech.map(t => `<div class="project-tech-item">${t}</div>`).join('');
    modalStats.innerHTML = project.stats.map(s => `
      <div class="project-stat-card">
        <div class="project-stat-card-value">${s.value}</div>
        <div class="project-stat-card-label">${s.label}</div>
      </div>
    `).join('');

    // gallery slides (use gradient as placeholder slides like original)
    gallerySlides.innerHTML = `
      <div class="project-gallery-slide" style="background: ${project.gradient};"></div>
      <div class="project-gallery-slide" style="background: ${project.gradient}; filter: hue-rotate(30deg);"></div>
      <div class="project-gallery-slide" style="background: ${project.gradient}; filter: hue-rotate(-30deg);"></div>
    `;

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

    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 updateGallery() {
    const slides = gallerySlides ? Array.from(gallerySlides.children) : [];
    slides.forEach((s, i) => {
      s.style.transform = `translateX(${(i - galleryIndex) * 100}%)`;
      s.classList.toggle('active', i === galleryIndex);
    });
  }

  function prevSlide() { galleryIndex = Math.max(0, galleryIndex - 1); updateGallery(); }
  function nextSlide() { const slides = gallerySlides ? gallerySlides.children.length : 0; galleryIndex = Math.min(slides - 1, 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;

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