<link href="https://cdn.jsdelivr.net/gh/rastikerdar/vazir-font@v30.1.0/dist/font-face.css" rel="stylesheet" type="text/css" />

<!-- هدر تزئینی -->
<div style="max-width:1100px; margin:0 auto; padding:20px;">
  <div style="
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    border-radius: 24px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
    margin-bottom: 25px;
  ">
    <div style="
      position: absolute;
      top: -50%;
      right: -10%;
      width: 300px;
      height: 300px;
      background: rgba(255,255,255,0.1);
      border-radius: 50%;
      filter: blur(40px);
    "></div>
    <div style="
      position: absolute;
      bottom: -50%;
      left: -10%;
      width: 250px;
      height: 250px;
      background: rgba(255,255,255,0.08);
      border-radius: 50%;
      filter: blur(40px);
    "></div>
    <h1 style="
      position: relative;
      font-family: Vazir, Tahoma;
      color: #fff;
      font-weight: 700;
      font-size: 36px;
      margin: 0;
      text-shadow: 0 2px 20px rgba(0,0,0,0.2);
      letter-spacing: -0.5px;
    ">
      📚 کتابخانه
    </h1>
    <p style="
      position: relative;
      color: rgba(255,255,255,0.9);
      font-family: Vazir, Tahoma;
      font-size: 14px;
      margin: 10px 0 0;
      font-weight: 300;
    ">
      مجموعه‌ای از بهترین منابع مطالعاتی
    </p>
  </div>

  <!-- نوار جستجو -->
  <div id="book-toolbar" style="
    max-width: 1100px;
    margin: 0 auto 20px;
    padding: 0 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    direction: rtl;
  ">
    <div style="position: relative; width: 100%; max-width: 600px;">
      <span style="
        position: absolute;
        right: 18px;
        top: 50%;
        transform: translateY(-50%);
        font-size: 18px;
        color: #999;
        pointer-events: none;
      ">🔍</span>
      <input id="book-search" type="text"
             placeholder="جستجو در عنوان، حیطه، نویسنده یا سال..."
             style="
               width: 100%;
               padding: 14px 50px 14px 20px;
               border-radius: 999px;
               border: 2px solid transparent;
               background: #fff;
               font-family: Vazir, Tahoma;
               font-size: 14px;
               outline: none;
               box-shadow: 0 4px 20px rgba(0,0,0,0.08);
               transition: all 0.3s ease;
               box-sizing: border-box;
             "
             onfocus="this.style.borderColor='#667eea'; this.style.boxShadow='0 4px 25px rgba(102, 126, 234, 0.25)';"
             onblur="this.style.borderColor='transparent'; this.style.boxShadow='0 4px 20px rgba(0,0,0,0.08)';">
    </div>
  </div>
</div>

<div id="book-grid" style="
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding: 10px 40px 60px;
  max-width: 1100px;
  margin: 0 auto;
  direction: rtl;
"></div>

<style>
  .card {
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.06);
    padding: 20px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    flex-direction: row-reverse;
    font-family: Vazir, Tahoma;
    border: 1px solid rgba(0,0,0,0.04);
    position: relative;
    overflow: hidden;
    cursor: pointer;
  }
  
  .card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, #667eea, #764ba2);
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  
  .card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.2);
  }
  
  .card:hover::before {
    opacity: 1;
  }
  
  .card:hover .card-icon img {
    transform: scale(1.1) rotate(-3deg);
  }
  
  .card-content { 
    flex: 1; 
    text-align: right; 
    padding-right: 15px;
  }
  
  .card-content h3 { 
    margin: 0 0 12px; 
    font-weight: 700; 
    font-size: 15px; 
    color: #2d3748; 
    line-height: 1.6;
  }
  
  .card-content .dot-line { 
    font-size: 12.5px; 
    color: #718096; 
    margin: 5px 0; 
    line-height: 1.7;
  }

  .download-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    border: none;
    border-radius: 25px;
    padding: 7px 18px;
    font-size: 12px;
    font-weight: 500;
    font-family: Vazir, Tahoma;
    text-decoration: none;
    margin-top: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
  }
  
  .download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.45);
    background: linear-gradient(135deg, #5568d3, #653a91);
  }
  
  .download-btn:active {
    transform: translateY(0);
  }

  .card-icon {
    background: linear-gradient(135deg, #f7f7f9, #eef0f5);
    border-radius: 16px;
    padding: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  
  .card-icon img { 
    width: 2cm; 
    height: 2cm; 
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
  }

  /* استایل حالت‌های خالی و خطا */
  .empty-state {
    grid-column: 1/-1;
    text-align: center;
    font-family: Vazir, Tahoma;
    color: #718096;
    background: linear-gradient(135deg, #fafbfc, #f5f7fa);
    border: 2px dashed #e2e8f0;
    padding: 50px 20px;
    border-radius: 20px;
    font-size: 14px;
  }
  
  .empty-state-icon {
    font-size: 48px;
    margin-bottom: 15px;
    opacity: 0.5;
  }
  
  .error-state {
    grid-column: 1/-1;
    text-align: center;
    font-family: Vazir, Tahoma;
    color: #c53030;
    background: linear-gradient(135deg, #fff5f5, #fed7d7);
    border: 2px dashed #fc8181;
    padding: 30px 20px;
    border-radius: 20px;
    font-size: 14px;
  }

  /* انیمیشن ورود کارت‌ها */
  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  .card {
    animation: fadeInUp 0.5s ease backwards;
  }
  
  /* لودینگ */
  .loading {
    grid-column: 1/-1;
    text-align: center;
    padding: 60px 20px;
  }
  
  .loading-spinner {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  
  .loading-text {
    font-family: Vazir, Tahoma;
    color: #718096;
    margin-top: 15px;
    font-size: 14px;
  }

  /* ریسپانسیو */
  @media (max-width:900px){
    #book-grid{grid-template-columns:1fr; padding: 10px 20px 40px;}
    .card{padding: 16px;}
  }
  
  @media (max-width:600px){
    #book-grid{padding: 10px 15px 30px;}
    .card-content h3{font-size: 14px;}
    .card-content .dot-line{font-size: 12px;}
    h1{font-size: 28px !important;}
  }
</style>


<script>
(() => {
  /* ===== تنظیمات ===== */
  const LIB_ID             = "nikan-west-library";
  const FORCED_DATA_PAGE_ID = 74285297;
  const JSON_FILE_NAME     = `library-${LIB_ID}.json`;
  /* =================== */

  function detectBase(){
    try{ if (window.AJS && typeof AJS.contextPath==="function") return AJS.contextPath(); }catch(e){}
    const meta = document.querySelector('meta[name="ajs-context-path"]')?.content;
    if (meta) return meta;
    const m = location.pathname.match(/^(.*)\/(pages|display|download)\//);
    if (m) return m;
    return '';
  }

  const BASE        = detectBase();
  const DATA_PAGE_ID = FORCED_DATA_PAGE_ID;
  const ENDPOINT_ATTACH_LIST =
    `${BASE}/rest/api/content/${DATA_PAGE_ID}/child/attachment`;

  const grid        = document.getElementById("book-grid");
  const searchInput = document.getElementById("book-search");

  let allBooks = [];

  // نمایش لودینگ
  function showLoading(){
    grid.innerHTML = `
      <div class="loading">
        <div class="loading-spinner"></div>
        <div class="loading-text">در حال بارگذاری کتاب‌ها...</div>
      </div>`;
  }

  function createBookCard(book, index){
    const authorsBlock = (book.authors && book.authors.length)
      ? book.authors.map(a=>`<div class="dot-line">✍️ ${a}</div>`).join("")
      : `<div class="dot-line">✍️ بدون نویسنده</div>`;

    const card = document.createElement("div");
    card.className = "card";
    card.style.animationDelay = `${index * 0.05}s`;
    card.innerHTML = `
      <div class="card-content">
        <h3>${book.title || "-"}</h3>
        <div class="dot-line">📂 حیطه: ${book.category || "-"}</div>
        ${authorsBlock}
        <div class="dot-line">📅 تاریخ انتشار: ${book.year || "-"}</div>
        ${book.fileUrl ? `<a href="${book.fileUrl}" target="_blank" class="download-btn">⬇ دانلود کتاب</a>` : ""}
      </div>
      <div class="card-icon">
        <img src="/download/thumbnails/79076840/12%20-%20Copy.png?api=v2" alt="کتاب">
      </div>
    `;
    return card;
  }

  function renderBooks(list){
    grid.innerHTML = "";
    if (!list.length){
      grid.innerHTML = `
        <div class="empty-state">
          <div class="empty-state-icon">📭</div>
          <div>کتابی با این فیلتر پیدا نشد.</div>
          <div style="font-size: 12px; color: #a0aec0; margin-top: 8px;">لطفاً عبارت دیگری جستجو کنید.</div>
        </div>`;
      return;
    }
    list.forEach((b, i) => grid.appendChild(createBookCard(b, i)));
  }

  async function getExistingAttachmentMeta() {
    const url = `${ENDPOINT_ATTACH_LIST}?filename=${encodeURIComponent(JSON_FILE_NAME)}&expand=results`;
    const res = await fetch(url, { credentials: "include" });
    if (!res.ok) return null;
    const data = await res.json();
    if (!data.results || !data.results.length) return null;
    return data.results;
  }

  async function loadJsonFromAttachment() {
    const meta = await getExistingAttachmentMeta();
    if (!meta) return { libId: LIB_ID, books: [] };

    const downloadLink = meta._links && meta._links.download;
    if (!downloadLink) return { libId: LIB_ID, books: [] };

    const res = await fetch(BASE + downloadLink, { credentials: "include" });
    if (!res.ok) throw new Error("خطا در دانلود JSON: " + res.status);
    const text = await res.text();
    if (!text.trim()) return { libId: LIB_ID, books: [] };

    try {
      const parsed = JSON.parse(text.replace(/^\uFEFF/, '').trim());
      if (!parsed.books) parsed.books = [];
      if (!parsed.libId) parsed.libId = LIB_ID;
      return parsed;
    } catch(e) {
      console.error("JSON parse error:", e);
      return { libId: LIB_ID, books: [] };
    }
  }

  async function loadBooks() {
    showLoading();
    try {
      const data = await loadJsonFromAttachment();
      allBooks = data.books || [];
      if (!allBooks.length) {
        grid.innerHTML = `
          <div class="empty-state">
            <div class="empty-state-icon">📚</div>
            <div>هنوز کتابی ثبت نشده است.</div>
            <div style="font-size: 12px; color: #a0aec0; margin-top: 8px;">از طریق فرم ثبت، اولین کتاب را اضافه کنید.</div>
          </div>`;
        return;
      }
      // کمی تأخیر برای نمایش لودینگ
      setTimeout(() => renderBooks(allBooks), 300);
    } catch (e) {
      console.error(e);
      grid.innerHTML = `
        <div class="error-state">
          <div style="font-size: 32px; margin-bottom: 10px;">⚠️</div>
          <div>خطا در خواندن کتاب‌ها</div>
          <div style="font-size: 12px; margin-top: 8px; opacity: 0.8;">${e.message}</div>
        </div>`;
    }
  }

  function handleSearch(){
    const q = (searchInput.value || "").trim().toLowerCase();
    if (!q){
      renderBooks(allBooks);
      return;
    }

    const filtered = allBooks.filter(b => {
      const title    = (b.title    || "").toLowerCase();
      const category = (b.category || "").toLowerCase();
      const year     = (b.year     || "").toLowerCase();
      const authors  = Array.isArray(b.authors) ? b.authors.join(" ") : (b.authors || "");
      const authorsL = authors.toLowerCase();

      const haystack = `${title} ${category} ${year} ${authorsL}`;
      return haystack.includes(q);
    });

    renderBooks(filtered);
  }

  // دیبانس برای سرچ بهتر
  let searchTimeout;
  searchInput.addEventListener("input", () => {
    clearTimeout(searchTimeout);
    searchTimeout = setTimeout(handleSearch, 200);
  });

  loadBooks();
})();
</script>