// Analytics load only after consent: Metrika, GTM and direct GA4.
// GA4 is configured here; do not configure the same GA4 tag/events again in GTM.
(function() {
    const key = 'olyapka_analytics_v2';
    const banner = document.getElementById('cookieBanner');
    let choice = null;
    try { choice = localStorage.getItem(key); } catch (err) { /* storage may be blocked */ }
    window.analyticsAllowed = choice === 'accepted';
    function loadAnalytics() {
        if (!window.analyticsAllowed || window.analyticsLoaded) return;
        window.analyticsLoaded = true;
        window.ym = window.ym || function() { (window.ym.a = window.ym.a || []).push(arguments); };
        window.ym.l = Date.now();
        const metrika = document.createElement('script');
        metrika.async = true; metrika.src = 'https://mc.yandex.ru/metrika/tag.js';
        document.head.append(metrika);
        window.ym(110606131, 'init', {clickmap: true, trackLinks: true, accurateTrackBounce: true, webvisor: true});
        window.dataLayer = window.dataLayer || [];
        window.gtag = window.gtag || function() { window.dataLayer.push(arguments); };
        window.gtag('js', new Date());
        window.gtag('config', 'G-T6084CKB81');
        const ga = document.createElement('script');
        ga.async = true; ga.src = 'https://www.googletagmanager.com/gtag/js?id=G-T6084CKB81';
        document.head.append(ga);
        window.dataLayer.push({'gtm.start': Date.now(), event: 'gtm.js'});
        const gtm = document.createElement('script');
        gtm.async = true; gtm.src = 'https://www.googletagmanager.com/gtm.js?id=GTM-M5HGH586';
        document.head.append(gtm);
    }
    function choose(value) {
        const wasAllowed = window.analyticsAllowed;
        try { localStorage.setItem(key, value); } catch (err) { /* session-only choice */ }
        window.analyticsAllowed = value === 'accepted';
        banner.hidden = true;
        banner.classList.remove('show');
        if (wasAllowed && !window.analyticsAllowed) { location.reload(); return; }
        loadAnalytics();
    }
    if (banner) {
        if (!choice) { banner.hidden = false; banner.classList.add('show'); }
        document.getElementById('cookieAccept').addEventListener('click', () => choose('accepted'));
        document.getElementById('cookieDecline').addEventListener('click', () => choose('declined'));
        document.getElementById('cookieSettings').addEventListener('click', () => {
            banner.hidden = false; banner.classList.add('show');
            document.getElementById('cookieAccept').focus();
        });
    }
    loadAnalytics();
})();

// Accessible mobile navigation, including Escape and focus return.
(function() {
    const burger = document.getElementById('burger');
    const nav = document.getElementById('nav');
    if (!burger || !nav) return;
    document.documentElement.classList.add('js-menu');
    function setOpen(open) {
        burger.classList.toggle('open', open);
        nav.classList.toggle('open', open);
        burger.setAttribute('aria-expanded', String(open));
        burger.setAttribute('aria-label', open ? 'Закрыть меню' : 'Открыть меню');
    }
    burger.addEventListener('click', () => setOpen(burger.getAttribute('aria-expanded') !== 'true'));
    nav.addEventListener('click', e => { if (e.target.closest('a')) setOpen(false); });
    document.addEventListener('keydown', e => {
        if (e.key === 'Escape' && nav.classList.contains('open')) { setOpen(false); burger.focus(); }
    });
    document.addEventListener('click', e => { if (!nav.contains(e.target) && !burger.contains(e.target)) setOpen(false); });
    matchMedia('(max-width: 768px)').addEventListener('change', () => setOpen(false));
})();

// ===== Goal Tracking (Yandex.Metrika + GA) =====
(function() {
    document.addEventListener('click', function(e) {
        const target = e.target.closest('[data-goal]');
        if (!target) return;
        const goal = target.getAttribute('data-goal');
        if (!goal) return;

        // Yandex.Metrika
        if (window.analyticsAllowed && typeof ym !== 'undefined') {
            try { ym(110606131, 'reachGoal', goal); } catch(err) {}
        }
        // Send existing button goals directly to GA4.
        if (window.analyticsAllowed && typeof window.gtag === 'function') {
            window.gtag('event', goal, {send_to: 'G-T6084CKB81'});
        }
        // Keep custom events available to the existing GTM container.
        if (window.analyticsAllowed && window.dataLayer) window.dataLayer.push({event: goal});
    });
})();

// Native anchor navigation preserves URL fragments and keyboard focus.

// ===== Portfolio Video Lightbox =====
(function() {
    const modal = document.getElementById('videoModal');
    const player = document.getElementById('videoModalPlayer');
    const title = document.getElementById('videoModalTitle');
    const fsBtn = document.getElementById('videoModalFullscreen');
    const triggers = document.querySelectorAll('.work-video[data-video]');
    if (!modal || !player || !triggers.length) return;

    let lastFocus = null;
    const background = Array.from(document.body.children).filter(el => el !== modal && el.tagName !== 'SCRIPT');
    let inertStates = [];
    modal.setAttribute('inert', '');

    function open(src, label) {
        lastFocus = document.activeElement;
        modal.removeAttribute('inert');
        inertStates = background.map(el => el.inert);
        background.forEach(el => { el.inert = true; });
        title.textContent = label || '';
        player.src = src;
        modal.classList.add('open');
        modal.setAttribute('aria-hidden', 'false');
        document.body.classList.add('video-modal-open');
        const p = player.play();
        if (p && typeof p.catch === 'function') p.catch(() => {});
        player.focus({ preventScroll: true });
    }

    function close() {
        if (document.fullscreenElement) {
            document.exitFullscreen().catch(() => {});
        }
        player.pause();
        modal.classList.remove('open');
        modal.setAttribute('aria-hidden', 'true');
        modal.setAttribute('inert', '');
        background.forEach((el, i) => { el.inert = inertStates[i]; });
        document.body.classList.remove('video-modal-open');
        setTimeout(() => {
            if (!modal.classList.contains('open')) {
                player.removeAttribute('src');
                player.load();
            }
        }, 300);
        if (lastFocus && typeof lastFocus.focus === 'function') lastFocus.focus({ preventScroll: true });
    }

    function toggleFullscreen() {
        if (document.fullscreenElement) {
            document.exitFullscreen().catch(() => {});
            return;
        }
        if (player.requestFullscreen) {
            player.requestFullscreen().catch(() => {});
        } else if (player.webkitEnterFullscreen) {
            player.webkitEnterFullscreen(); // iOS Safari
        }
    }

    triggers.forEach(btn => {
        btn.addEventListener('click', function(e) {
            e.preventDefault();
            open(btn.getAttribute('data-video'), btn.getAttribute('data-title'));
        });
    });

    modal.querySelectorAll('[data-video-close]').forEach(el => {
        el.addEventListener('click', close);
    });

    // Клик по тёмной области вокруг плеера тоже закрывает окно
    modal.querySelectorAll('.video-modal-dialog, .video-modal-stage, .video-modal-bar').forEach(el => {
        el.addEventListener('click', function(e) {
            if (e.target === el) close();
        });
    });

    if (fsBtn) fsBtn.addEventListener('click', toggleFullscreen);

    player.addEventListener('dblclick', toggleFullscreen);

    document.addEventListener('keydown', function(e) {
        if (!modal.classList.contains('open')) return;
        if (e.key === 'Escape') { close(); return; }
        if (e.key === 'Tab') {
            const stops = Array.from(modal.querySelectorAll('button, video[controls]'));
            const first = stops[0], last = stops[stops.length - 1];
            if (e.shiftKey && document.activeElement === first) { e.preventDefault(); last.focus(); }
            else if (!e.shiftKey && document.activeElement === last) { e.preventDefault(); first.focus(); }
        }
        if (e.key === ' ' && document.activeElement === player) return; // native handling
        if ((e.key === 'f' || e.key === 'F') && document.activeElement === player) toggleFullscreen();
    });
})();