<affitrackr-widget></affitrackr-widget>

<style>
    /* ══════════════════════════════════════════
       AFFITRACKR WIDGET — MOBILE VERSION
       1 cột, AD sau mỗi 3 card
    ══════════════════════════════════════════ */

    /* ── Fix CMS .adv-center negative margin (mobile only) ── */
    .adv-center:has(affitrackr-widget),
    .adv:has(affitrackr-widget) {
        float: none !important;
        clear: both !important;
        display: block !important;
        width: 100% !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        box-sizing: border-box !important;
    }
    affitrackr-widget {
        float: none !important;
        clear: both !important;
        display: block !important;
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        margin: 0 !important;
        padding: 0 !important;
        box-sizing: border-box !important;
        text-align: left !important;
    }

    .affi-widget {
        display: block;
        font-family: sans-serif;
        box-sizing: border-box;
        text-align: left;
        overflow: hidden;
        max-width: 100%;
        background: #ffffff;
        border-radius: 6px;
        margin: 20px 0;
        padding: 16px;
    }

    .affi-title {
        font-size: 22px;
        color: #333;
        border-left: 4px solid #e11d48;
        padding-left: 10px;
        margin: 0 0 16px;
        font-weight: bold;
        text-transform: uppercase;
    }

    /* ── Grid: 1 cột ── */
    .affi-grid {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        gap: 15px;
        max-width: 100%;
        box-sizing: border-box;
    }

    .affi-ad-slot { grid-column: 1 / -1 !important; }

    /* ── Card ── */
    .affi-card {
        border: 1px solid #c8b99a;
        border-radius: 4px;
        overflow: hidden;
        display: flex;
        flex-direction: column;
        opacity: 0;
        transform: translateY(10px);
        transition: opacity 0.35s ease, transform 0.35s ease;
        background-color: #ede0c4;
        background-image:
            repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(160,130,80,0.04) 2px, rgba(160,130,80,0.04) 3px),
            repeating-linear-gradient(90deg, transparent, transparent 3px, rgba(140,110,60,0.03) 3px, rgba(140,110,60,0.03) 4px),
            linear-gradient(160deg, #f0e4c8 0%, #e8d8b0 40%, #ede0c4 70%, #e5d5aa 100%);
    }
    .affi-card.affi-visible { opacity: 1; transform: translateY(0); }
    @media (prefers-reduced-motion: reduce) {
        .affi-card { opacity: 1; transform: none; transition: none; }
    }

    .affi-thumb-link {
        display: block; width: 100%; padding-top: 56.25%;
        position: relative; overflow: hidden; text-decoration: none;
    }
    .affi-thumb-img {
        position: absolute; top: 0; left: 0;
        width: 100%; height: 100%; object-fit: cover; transition: transform 0.2s;
    }
    .affi-thumb-link:hover .affi-thumb-img { transform: scale(1.04); }

    .affi-card-body { padding: 12px; flex: 1; display: flex; flex-direction: column; }
    .affi-card-title {
        text-decoration: none; color: #1a1208; font-weight: bold;
        font-size: 16px; line-height: 1.45;
        display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
        overflow: hidden; margin-bottom: 8px;
    }
    .affi-card-title:hover { color: #e11d48; }
    .affi-card-source {
        font-size: 11px; color: #8a7d65; font-weight: 500;
        text-transform: uppercase; margin-top: auto;
    }

    .affi-ad-slot {
        width: 100%; max-width: 100%; box-sizing: border-box; overflow: hidden;
        opacity: 0; transform: translateY(10px);
        transition: opacity 0.35s ease, transform 0.35s ease;
    }
    .affi-ad-slot.affi-visible { opacity: 1; transform: translateY(0); }
    .affi-ad-slot ins { display: block !important; width: 100% !important; }

    /* ── Skeleton ── */
    @keyframes affi-shimmer {
        0%   { background-position: -400px 0; }
        100% { background-position:  400px 0; }
    }
    .affi-skeleton { border: 1px solid #eee; border-radius: 6px; overflow: hidden; background: #fff; }
    .affi-skeleton-thumb {
        padding-top: 56.25%;
        background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
        background-size: 800px 100%; animation: affi-shimmer 1.4s infinite linear;
    }
    .affi-skeleton-body { padding: 12px; }
    .affi-skeleton-line {
        height: 12px; border-radius: 4px;
        background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
        background-size: 800px 100%; animation: affi-shimmer 1.4s infinite linear; margin-bottom: 8px;
    }
    .affi-skeleton-line.affi-short { width: 60%; }
</style>

<script>
class AffitrackrWidget extends HTMLElement {

    static AD_CLIENT       = 'ca-pub-7078400245394460';
    static AD_SLOT         = '7322516041';
    static CARDS_PER_BLOCK = 3;   // Mobile: AD sau mỗi 3 card
    static TOTAL_ARTICLES  = 20;

    connectedCallback() {
        this.classList.add('affi-widget');
        this.innerHTML = `
            <h3 class="affi-title">Có thể bạn quan tâm</h3>
            <div class="affi-grid" id="affi-grid"></div>
        `;
        this._showSkeletons();
        this._loadArticles();
    }

    _showSkeletons() {
        const grid = this.querySelector('#affi-grid');
        grid.innerHTML = Array(4).fill(`
            <div class="affi-skeleton">
                <div class="affi-skeleton-thumb"></div>
                <div class="affi-skeleton-body">
                    <div class="affi-skeleton-line"></div>
                    <div class="affi-skeleton-line affi-short"></div>
                </div>
            </div>
        `).join('');
    }

    _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;
    }

    _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 {}
    }

    async _fetchArticles() {
        const CACHE_KEY = 'affi_articles_cache';
        const CACHE_TTL = 5 * 60 * 1000;
        try {
            const raw = sessionStorage.getItem(CACHE_KEY);
            if (raw) {
                const { ts, data } = JSON.parse(raw);
                if (Date.now() - ts < CACHE_TTL) return data;
            }
        } catch {}
        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 {}
            return data;
        } catch (err) { clearTimeout(timer); throw err; }
    }

    _safeUrl(url) {
        try {
            const u = new URL(url);
            return (u.protocol === 'https:' || u.protocol === 'http:') ? url : '#';
        } catch { return '#'; }
    }

    _buildCard(item, eager = false) {
        const card = document.createElement('div');
        card.className = 'affi-card';

        const thumbLink = document.createElement('a');
        thumbLink.href = this._safeUrl(item.u);
        thumbLink.className = 'affi-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);
        img.className = 'affi-thumb-img';
        img.loading = eager ? 'eager' : 'lazy';
        img.decoding = eager ? 'sync' : 'async';
        img.onerror = () => { img.style.display = 'none'; };
        thumbLink.appendChild(img);

        const body = document.createElement('div');
        body.className = 'affi-card-body';

        const titleLink = document.createElement('a');
        titleLink.href = this._safeUrl(item.u);
        titleLink.className = 'affi-card-title';
        titleLink.target = '_top';
        titleLink.rel = 'noopener noreferrer';
        titleLink.textContent = item.t ?? '';

        const source = document.createElement('span');
        source.className = 'affi-card-source';
        source.textContent = item.src ?? 'VOH';

        body.appendChild(titleLink);
        body.appendChild(source);
        card.appendChild(thumbLink);
        card.appendChild(body);
        return card;
    }

    _buildAdSlot() {
        const wrapper = document.createElement('div');
        wrapper.className = 'affi-ad-slot';
        wrapper.dataset.adPending = 'true';

        const observer = new IntersectionObserver((entries, obs) => {
            entries.forEach(entry => {
                if (!entry.isIntersecting) return;
                obs.unobserve(wrapper);
                if (wrapper.dataset.adPending !== 'true') return;
                delete wrapper.dataset.adPending;

                const ins = document.createElement('ins');
                ins.className = 'adsbygoogle';
                ins.style.display = 'block';
                ins.dataset.adClient = AffitrackrWidget.AD_CLIENT;
                ins.dataset.adSlot = AffitrackrWidget.AD_SLOT;
                ins.dataset.adFormat = 'auto';
                ins.dataset.fullWidthResponsive = 'true';
                wrapper.appendChild(ins);
                try { (window.adsbygoogle = window.adsbygoogle || []).push({}); }
                catch (e) { console.warn('[affitrackr-mobile] AdSense error:', e); }
            });
        }, { rootMargin: '0px 0px 200px 0px', threshold: 0 });

        observer.observe(wrapper);
        return wrapper;
    }

    _observeElements(els) {
        if (!('IntersectionObserver' in window)) {
            els.forEach(el => el.classList.add('affi-visible'));
            return;
        }
        const observer = new IntersectionObserver((entries) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    entry.target.classList.add('affi-visible');
                    observer.unobserve(entry.target);
                }
            });
        }, { rootMargin: '0px 0px 80px 0px', threshold: 0.05 });
        els.forEach(el => observer.observe(el));
    }

    _render(articles) {
        const grid = this.querySelector('#affi-grid');
        grid.innerHTML = '';

        const allEls  = [];
        let adCount   = 0;
        let cardCount = 0; // đếm card trong block hiện tại

        articles.forEach((item, i) => {
            const card = this._buildCard(item, i < 2); // 2 card đầu eager
            grid.appendChild(card);
            allEls.push(card);
            cardCount++;

            // Sau mỗi CARDS_PER_BLOCK card → chèn AD
            if (cardCount === AffitrackrWidget.CARDS_PER_BLOCK) {
                const adSlot = this._buildAdSlot(adCount++);
                grid.appendChild(adSlot);
                allEls.push(adSlot);
                cardCount = 0;
            }
        });

        allEls.slice(0, 2).forEach(el => el.classList.add('affi-visible'));
        this._observeElements(allEls.slice(2));
    }

    async _loadArticles() {
        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_mobile', []);

            let pool = allArticles.filter(a => !history.includes(a.id) && a.u !== currentUrl);
            if (pool.length < AffitrackrWidget.TOTAL_ARTICLES) {
                history = [];
                pool = allArticles.filter(a => a.u !== currentUrl);
            }

            const recommended = this._shuffle(pool).slice(0, AffitrackrWidget.TOTAL_ARTICLES);
            recommended.forEach(a => history.push(a.id));
            this._storageSet('seen_articles_mobile', history.slice(-200));
            this._render(recommended);
        } catch {
            this.style.display = 'none';
        }
    }
}

if (!customElements.get('affitrackr-widget')) {
    customElements.define('affitrackr-widget', AffitrackrWidget);
}
</script>



<affitrackr-widget></affitrackr-widget>

<style>
    /* ══════════════════════════════════════════
       AFFITRACKR WIDGET — PC VERSION
       2 cột, AD full width sau mỗi 4 card (2 row)
    ══════════════════════════════════════════ */

    /* ── PC không có negative margin trick từ CMS, reset đơn giản ── */
    affitrackr-widget {
        display: block !important;
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        margin: 0 !important;
        padding: 0 !important;
        box-sizing: border-box !important;
        text-align: left !important;
        float: none !important;
        clear: both !important;
    }

    .affi-widget {
        display: block;
        font-family: sans-serif;
        box-sizing: border-box;
        text-align: left;
        overflow: hidden;
        max-width: 100%;
        background: #ffffff;
        border-radius: 6px;
        margin: 20px 0;
        padding: 20px;
    }

    .affi-title {
        font-size: 22px;
        color: #333;
        border-left: 4px solid #e11d48;
        padding-left: 10px;
        margin: 0 0 16px;
        font-weight: bold;
        text-transform: uppercase;
    }

    /* ── Grid: 2 cột ── */
    .affi-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
        max-width: 100%;
        box-sizing: border-box;
    }

    /* AD span full width (2 cột) */
    .affi-ad-slot { grid-column: 1 / -1 !important; }

    /* ── Card ── */
    .affi-card {
        border: 1px solid #c8b99a;
        border-radius: 4px;
        overflow: hidden;
        display: flex;
        flex-direction: column;
        opacity: 0;
        transform: translateY(10px);
        transition: opacity 0.35s ease, transform 0.35s ease;
        background-color: #ede0c4;
        background-image:
            repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(160,130,80,0.04) 2px, rgba(160,130,80,0.04) 3px),
            repeating-linear-gradient(90deg, transparent, transparent 3px, rgba(140,110,60,0.03) 3px, rgba(140,110,60,0.03) 4px),
            linear-gradient(160deg, #f0e4c8 0%, #e8d8b0 40%, #ede0c4 70%, #e5d5aa 100%);
    }
    .affi-card.affi-visible { opacity: 1; transform: translateY(0); }
    @media (prefers-reduced-motion: reduce) {
        .affi-card { opacity: 1; transform: none; transition: none; }
    }

    .affi-thumb-link {
        display: block; width: 100%; padding-top: 56.25%;
        position: relative; overflow: hidden; text-decoration: none;
    }
    .affi-thumb-img {
        position: absolute; top: 0; left: 0;
        width: 100%; height: 100%; object-fit: cover; transition: transform 0.2s;
    }
    .affi-thumb-link:hover .affi-thumb-img { transform: scale(1.04); }

    .affi-card-body { padding: 12px; flex: 1; display: flex; flex-direction: column; }
    .affi-card-title {
        text-decoration: none; color: #1a1208; font-weight: bold;
        font-size: 16px; line-height: 1.45;
        display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
        overflow: hidden; margin-bottom: 8px;
    }
    .affi-card-title:hover { color: #e11d48; }
    .affi-card-source {
        font-size: 11px; color: #8a7d65; font-weight: 500;
        text-transform: uppercase; margin-top: auto;
    }

    .affi-ad-slot {
        width: 100%; max-width: 100%; box-sizing: border-box;
        opacity: 0; transform: translateY(10px);
        transition: opacity 0.35s ease, transform 0.35s ease;
    }
    .affi-ad-slot.affi-visible { opacity: 1; transform: translateY(0); }
    .affi-ad-slot ins { display: block !important; width: 100% !important; }

    /* ── Skeleton ── */
    @keyframes affi-shimmer {
        0%   { background-position: -400px 0; }
        100% { background-position:  400px 0; }
    }
    .affi-skeleton { border: 1px solid #eee; border-radius: 6px; overflow: hidden; background: #fff; }
    .affi-skeleton-thumb {
        padding-top: 56.25%;
        background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
        background-size: 800px 100%; animation: affi-shimmer 1.4s infinite linear;
    }
    .affi-skeleton-body { padding: 12px; }
    .affi-skeleton-line {
        height: 12px; border-radius: 4px;
        background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
        background-size: 800px 100%; animation: affi-shimmer 1.4s infinite linear; margin-bottom: 8px;
    }
    .affi-skeleton-line.affi-short { width: 60%; }
</style>

<script>
class AffitrackrWidget extends HTMLElement {

    static AD_CLIENT       = 'ca-pub-7078400245394460';
    static AD_SLOT         = '7322516041';
    static CARDS_PER_BLOCK = 4;   // PC: AD sau mỗi 4 card (2 row × 2 cột)
    static TOTAL_ARTICLES  = 20;

    connectedCallback() {
        this.classList.add('affi-widget');
        this.innerHTML = `
            <h3 class="affi-title">Có thể bạn quan tâm</h3>
            <div class="affi-grid" id="affi-grid"></div>
        `;
        this._showSkeletons();
        this._loadArticles();
    }

    _showSkeletons() {
        const grid = this.querySelector('#affi-grid');
        grid.innerHTML = Array(4).fill(`
            <div class="affi-skeleton">
                <div class="affi-skeleton-thumb"></div>
                <div class="affi-skeleton-body">
                    <div class="affi-skeleton-line"></div>
                    <div class="affi-skeleton-line affi-short"></div>
                </div>
            </div>
        `).join('');
    }

    _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;
    }

    _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 {}
    }

    async _fetchArticles() {
        const CACHE_KEY = 'affi_articles_cache';
        const CACHE_TTL = 5 * 60 * 1000;
        try {
            const raw = sessionStorage.getItem(CACHE_KEY);
            if (raw) {
                const { ts, data } = JSON.parse(raw);
                if (Date.now() - ts < CACHE_TTL) return data;
            }
        } catch {}
        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 {}
            return data;
        } catch (err) { clearTimeout(timer); throw err; }
    }

    _safeUrl(url) {
        try {
            const u = new URL(url);
            return (u.protocol === 'https:' || u.protocol === 'http:') ? url : '#';
        } catch { return '#'; }
    }

    _buildCard(item, eager = false) {
        const card = document.createElement('div');
        card.className = 'affi-card';

        const thumbLink = document.createElement('a');
        thumbLink.href = this._safeUrl(item.u);
        thumbLink.className = 'affi-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);
        img.className = 'affi-thumb-img';
        img.loading = eager ? 'eager' : 'lazy';
        img.decoding = eager ? 'sync' : 'async';
        img.onerror = () => { img.style.display = 'none'; };
        thumbLink.appendChild(img);

        const body = document.createElement('div');
        body.className = 'affi-card-body';

        const titleLink = document.createElement('a');
        titleLink.href = this._safeUrl(item.u);
        titleLink.className = 'affi-card-title';
        titleLink.target = '_top';
        titleLink.rel = 'noopener noreferrer';
        titleLink.textContent = item.t ?? '';

        const source = document.createElement('span');
        source.className = 'affi-card-source';
        source.textContent = item.src ?? 'VOH';

        body.appendChild(titleLink);
        body.appendChild(source);
        card.appendChild(thumbLink);
        card.appendChild(body);
        return card;
    }

    _buildAdSlot() {
        const wrapper = document.createElement('div');
        wrapper.className = 'affi-ad-slot';
        wrapper.dataset.adPending = 'true';

        const observer = new IntersectionObserver((entries, obs) => {
            entries.forEach(entry => {
                if (!entry.isIntersecting) return;
                obs.unobserve(wrapper);
                if (wrapper.dataset.adPending !== 'true') return;
                delete wrapper.dataset.adPending;

                const ins = document.createElement('ins');
                ins.className = 'adsbygoogle';
                ins.style.display = 'block';
                ins.dataset.adClient = AffitrackrWidget.AD_CLIENT;
                ins.dataset.adSlot = AffitrackrWidget.AD_SLOT;
                ins.dataset.adFormat = 'auto';
                ins.dataset.fullWidthResponsive = 'true';
                wrapper.appendChild(ins);
                try { (window.adsbygoogle = window.adsbygoogle || []).push({}); }
                catch (e) { console.warn('[affitrackr-pc] AdSense error:', e); }
            });
        }, { rootMargin: '0px 0px 200px 0px', threshold: 0 });

        observer.observe(wrapper);
        return wrapper;
    }

    _observeElements(els) {
        if (!('IntersectionObserver' in window)) {
            els.forEach(el => el.classList.add('affi-visible'));
            return;
        }
        const observer = new IntersectionObserver((entries) => {
            entries.forEach(entry => {
                if (entry.isIntersecting) {
                    entry.target.classList.add('affi-visible');
                    observer.unobserve(entry.target);
                }
            });
        }, { rootMargin: '0px 0px 80px 0px', threshold: 0.05 });
        els.forEach(el => observer.observe(el));
    }

    _render(articles) {
        const grid = this.querySelector('#affi-grid');
        grid.innerHTML = '';

        const allEls  = [];
        let adCount   = 0;
        let cardCount = 0;

        // Layout 2 cột:
        // [card] [card]
        // [card] [card]  → sau 4 card → AD
        // [── AD full width ──]
        // [card] [card]
        // ...
        articles.forEach((item, i) => {
            const card = this._buildCard(item, i < 4); // 4 card đầu eager (2 row đầu)
            grid.appendChild(card);
            allEls.push(card);
            cardCount++;

            if (cardCount === AffitrackrWidget.CARDS_PER_BLOCK) {
                const adSlot = this._buildAdSlot(adCount++);
                grid.appendChild(adSlot);
                allEls.push(adSlot);
                cardCount = 0;
            }
        });

        allEls.slice(0, 4).forEach(el => el.classList.add('affi-visible'));
        this._observeElements(allEls.slice(4));
    }

    async _loadArticles() {
        try {
            const data = await this._fetchArticles();
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