<affitrackr-widget></affitrackr-widget>

<script>
class AffitrackrWidget extends HTMLElement {
    constructor() {
        super();
        this.attachShadow({ mode: 'open' });
    }

    connectedCallback() {
        this.shadowRoot.innerHTML = `
            <style>
                :host {
                    display: block !important;
                    margin: 30px 0 !important;
                    width: 100% !important;
                    font-family: sans-serif !important;
                    /* Bù lại negative margin của .adv-center ở mobile */
                    box-sizing: border-box !important;
                    padding-left: 16px !important;
                    padding-right: 16px !important;
                    /* Override text-align: center từ .adv-center cha */
                    text-align: left !important;
                }

                /* ── Header ── */
                .box-title {
                    font-size: 18px;
                    color: #333;
                    border-left: 4px solid #e11d48;
                    padding-left: 10px;
                    margin: 0 0 20px;
                    font-weight: bold;
                    text-transform: uppercase;
                }

                /* ── Grid ── */
                .suggest-grid {
                    display: grid !important;
                    grid-template-columns: repeat(4, 1fr) !important;
                    gap: 15px !important;
                }
                @media (max-width: 992px) { .suggest-grid { grid-template-columns: repeat(2, 1fr) !important; } }
                @media (max-width: 576px)  { .suggest-grid { grid-template-columns: 1fr !important; } }

                /* ── Lazy card fade-in ── */
                .suggest-card {
                    opacity: 0;
                    transform: translateY(10px);
                    transition: opacity 0.35s ease, transform 0.35s ease;
                }
                .suggest-card.visible {
                    opacity: 1;
                    transform: translateY(0);
                }
                @media (prefers-reduced-motion: reduce) {
                    .suggest-card { opacity: 1; transform: none; transition: none; }
                }

                /* ── Card ── */
                .suggest-card {
                    border: 1px solid #eee;
                    border-radius: 6px;
                    overflow: hidden;
                    background: #fff;
                    display: flex !important;
                    flex-direction: column !important;
                    /* opacity/transform handled by lazy animation above */
                }

                /* 16:9 padding hack */
                .thumb-link {
                    display: block !important;
                    width: 100% !important;
                    padding-top: 56.25% !important;
                    position: relative;
                    overflow: hidden;
                }
                .thumb-img {
                    position: absolute;
                    top: 0; left: 0;
                    width: 100% !important;
                    height: 100% !important;
                    object-fit: cover !important;
                    transition: transform 0.2s;
                }
                .thumb-link:hover .thumb-img { transform: scale(1.04); }

                .card-content {
                    padding: 12px !important;
                    flex: 1;
                    display: flex;
                    flex-direction: column;
                }
                .title-link {
                    text-decoration: none !important;
                    color: #222 !important;
                    font-weight: bold;
                    font-size: 14px;
                    line-height: 1.4;
                    display: -webkit-box !important;
                    -webkit-line-clamp: 2;
                    -webkit-box-orient: vertical;
                    overflow: hidden;
                    margin-bottom: 8px;
                }
                .title-link:hover { color: #e11d48; }
                .source-tag {
                    font-size: 11px;
                    color: #a0a0a0;
                    font-weight: 500;
                    text-transform: uppercase;
                    margin-top: auto;
                }

                /* ── Skeleton ── */
                @keyframes shimmer {
                    0%   { background-position: -400px 0; }
                    100% { background-position:  400px 0; }
                }
                .skeleton {
                    border: 1px solid #eee;
                    border-radius: 6px;
                    overflow: hidden;
                    background: #fff;
                }
                .skeleton-thumb {
                    padding-top: 56.25%;
                    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
                    background-size: 800px 100%;
                    animation: shimmer 1.4s infinite linear;
                }
                .skeleton-body { padding: 12px; }
                .skeleton-line {
                    height: 12px;
                    border-radius: 4px;
                    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
                    background-size: 800px 100%;
                    animation: shimmer 1.4s infinite linear;
                    margin-bottom: 8px;
                }
                .skeleton-line.short { width: 60%; }
            </style>

            <div id="widget-container">
                <h3 class="box-title">Có thể bạn quan tâm</h3>
                <div class="suggest-grid" id="recommendation-list"></div>
            </div>
        `;

        this._showSkeletons();
        this._loadArticles();
    }

    /* ── Skeleton placeholders ── */
    _showSkeletons() {
        const container = this.shadowRoot.getElementById('recommendation-list');
        container.innerHTML = Array(8).fill(`
            <div class="skeleton">
                <div class="skeleton-thumb"></div>
                <div class="skeleton-body">
                    <div class="skeleton-line"></div>
                    <div class="skeleton-line short"></div>
                </div>
            </div>
        `).join('');
    }

    /* ── Fisher-Yates shuffle ── */
    _shuffle(arr) {
        const a = [...arr];
        for (let i = a.length - 1; i > 0; i--) {
            const j = Math.floor(Math.random() * (i + 1));
            [a[i], a[j]] = [a[j], a[i]];
        }
        return a;
    }

    /* ── Safe read from localStorage (fails silently in sandboxed iframe) ── */
    _storageGet(key, fallback) {
        try { return JSON.parse(localStorage.getItem(key)) ?? fallback; }
        catch { return fallback; }
    }
    _storageSet(key, value) {
        try { localStorage.setItem(key, JSON.stringify(value)); }
        catch { /* ignore */ }
    }

    /* ── Fetch with timeout + sessionStorage cache ── */
    async _fetchArticles() {
        const CACHE_KEY = 'affi_articles_cache';
        const CACHE_TTL = 5 * 60 * 1000; // 5 phút

        try {
            const raw = sessionStorage.getItem(CACHE_KEY);
            if (raw) {
                const { ts, data } = JSON.parse(raw);
                if (Date.now() - ts < CACHE_TTL) return data;
            }
        } catch { /* cache miss */ }

        const controller = new AbortController();
        const timer = setTimeout(() => controller.abort(), 5000);

        try {
            const res = await fetch(
                'https://affitrackr.com/cdn/affitrackr/articles.json',
                { signal: controller.signal }
            );
            clearTimeout(timer);

            if (!res.ok) throw new Error(`HTTP ${res.status}`);
            const data = await res.json();

            try {
                sessionStorage.setItem(CACHE_KEY, JSON.stringify({ ts: Date.now(), data }));
            } catch { /* storage full – ignore */ }

            return data;
        } catch (err) {
            clearTimeout(timer);
            throw err;
        }
    }

    /* ── Escape để chống XSS ── */
    _esc(str) {
        const d = document.createElement('div');
        d.textContent = String(str ?? '');
        return d.innerHTML;
    }

    /* ── Validate URL (chỉ cho phép http / https) ── */
    _safeUrl(url) {
        try {
            const u = new URL(url);
            return (u.protocol === 'https:' || u.protocol === 'http:') ? url : '#';
        } catch { return '#'; }
    }

    /* ── Build card DOM (không dùng innerHTML với data từ API) ── */
    _buildCard(item) {
        const card = document.createElement('div');
        card.className = 'suggest-card';

        // Thumbnail link
        const thumbLink = document.createElement('a');
        thumbLink.href   = this._safeUrl(item.u);
        thumbLink.className = 'thumb-link';
        thumbLink.target = '_top';
        thumbLink.rel    = 'noopener noreferrer';

        const img = document.createElement('img');
        img.src     = this._safeUrl(item.i);
        img.alt     = String(item.t ?? '').slice(0, 100); // truncate alt
        img.className = 'thumb-img';
        img.loading = 'lazy';
        img.onerror = () => { img.style.display = 'none'; };

        thumbLink.appendChild(img);

        // Card body
        const body = document.createElement('div');
        body.className = 'card-content';

        const titleLink = document.createElement('a');
        titleLink.href      = this._safeUrl(item.u);
        titleLink.className = 'title-link';
        titleLink.target    = '_top';
        titleLink.rel       = 'noopener noreferrer';
        titleLink.textContent = item.t ?? '';

        const source = document.createElement('span');
        source.className   = 'source-tag';
        source.textContent = item.src ?? 'VOH';

        body.appendChild(titleLink);
        body.appendChild(source);
        card.appendChild(thumbLink);
        card.appendChild(body);

        return card;
    }

    /* ── Lazy reveal cards khi scroll vào viewport ── */
    _observeCards(cards) {
        // Nếu browser không hỗ trợ IntersectionObserver thì hiện hết luôn
        if (!('IntersectionObserver' in window)) {
            cards.forEach(c => c.classList.add('visible'));
            return;
        }

        const observer = new IntersectionObserver((entries) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    entry.target.classList.add('visible');
                    observer.unobserve(entry.target);
                }
            });
        }, {
            rootMargin: '0px 0px 80px 0px', // trigger sớm 80px trước khi vào viewport
            threshold: 0.05
        });

        cards.forEach(card => observer.observe(card));
    }

    /* ── Main load logic ── */
    async _loadArticles() {
        const container = this.shadowRoot.getElementById('recommendation-list');

        try {
            const data = await this._fetchArticles();
            const allArticles = Array.isArray(data?.items) ? data.items : [];

            if (allArticles.length === 0) throw new Error('empty');

            const currentUrl = window.location.href;
            let history = this._storageGet('seen_articles', []);

            let pool = allArticles.filter(a => !history.includes(a.id) && a.u !== currentUrl);
            if (pool.length < 20) {
                history = [];
                pool = allArticles.filter(a => a.u !== currentUrl);
            }

            const recommended = this._shuffle(pool).slice(0, 20);

            recommended.forEach(a => history.push(a.id));
            this._storageSet('seen_articles', history.slice(-200)); // tăng buffer lên 200

            // Render tất cả cards vào DOM (ẩn, chờ observer reveal)
            container.innerHTML = '';
            const cardEls = recommended.map(item => {
                const card = this._buildCard(item);
                container.appendChild(card);
                return card;
            });

            // 4 card đầu hiện ngay, còn lại lazy reveal khi scroll
            cardEls.slice(0, 4).forEach(c => c.classList.add('visible'));
            this._observeCards(cardEls.slice(4));

        } catch {
            this.shadowRoot.getElementById('widget-container').style.display = 'none';
        }
    }
}

if (!customElements.get('affitrackr-widget')) {
    customElements.define('affitrackr-widget', AffitrackrWidget);
}
</script>

<div style="width: 100%; background-color: #fbf3e4; display: flex; justify-content: center; align-items: center; padding: 3px 0;">
  <div style="display: flex; align-items: center;">
    <div style="text-align: center; font-size: 11px; font-weight: normal; background-color: gray; color: white; padding: 1px 5px; /* Khoảng cách giữa chữ Ad và chữ Quảng cáo */ margin: 0 3px; border-radius: 1px; /* Bo cạnh 3px */">Ad</div>
    <div style="text-align: center; font-size: 11px; font-weight: normal; color: #000000;">QUẢNG CÁO</div>
  </div>
</div>
<div style="height: 150px;">
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-7078400245394460"
     crossorigin="anonymous"></script>

<ins class="adsbygoogle"
     style="display:block"
     data-ad-client="ca-pub-7078400245394460"
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<script>
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</div>
<script type="text/javascript" class="teads" src="//a.teads.tv/page/158267/tag" async="true"></script>

<div id="div-gpt-ad-1774028169166-0" style="min-width: 300px; min-height: 250px; margin: 15px auto;">
  <script>
    (function() {
      var slotId = 'div-gpt-ad-1774028169166-0';
      var adUnitPath = '/23295639029/voh_article_outstream';

      console.log('%c [CMS] ✅ 1. Script bắt đầu thực thi...', 'color: green;');

      // KHAI BÁO CỨNG: Đảm bảo googletag và cmd luôn tồn tại
      window.googletag = window.googletag || {cmd: []};

      // 1. Nạp thư viện gpt.js (Nếu chưa có)
      if (!document.getElementById('gpt-lib')) {
        var gads = document.createElement('script');
        gads.id = 'gpt-lib';
        gads.async = true;
        gads.src = 'https://securepubads.g.doubleclick.net/tag/js/gpt.js';
        gads.crossOrigin = "anonymous";
        document.head.appendChild(gads);
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      // 2. Kiểm tra lại một lần nữa trước khi push
      if (typeof window.googletag.cmd === 'undefined') {
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        // Lắng nghe Render để Debug
        googletag.pubads().addEventListener('slotRenderEnded', function(event) {
          if (event.slot.getSlotElementId() === slotId) {
            console.log(event.isEmpty ? '%c [GAM] ⚠️ NO FILL' : '%c [GAM] 🎉 QUẢNG CÁO ĐÃ HIỆN', 'font-weight:bold; color:orange;');
          }
        });

        // Xóa slot cũ để tránh lỗi "hố" đã bị chiếm chỗ (Rất quan trọng cho React/Next.js)
        var oldSlot = googletag.pubads().getSlots().filter(function(s) {
            return s.getSlotElementId() === slotId;
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        if (oldSlot) { googletag.destroySlots([oldSlot]); }

        googletag.defineSlot(adUnitPath, [[400, 300], [640, 480], 'fluid'], slotId)
                 .addService(googletag.pubads());

        googletag.pubads().enableSingleRequest();
        googletag.pubads().collapseEmptyDivs();
        googletag.enableServices();
        
        googletag.display(slotId);
      });
    })();
  </script>
</div>

<zone id="kjbdaxby"></zone>
<script>
arfAsync.push("kjbdaxby");
</script>

VOH FM 99.9 MHz

FM 99.9

Online 360 

VOH AM 610 KHz

AM 610

Thời sự 30p trực tiếp

VOH FM 95.6 MHz

FM 95.6

Nhân Humanity

Giải mã thị trường

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