/* Баннер ЧП 2026: сегмент GetCourse + пауза в браузере на 48 часов. */
(function () {
  'use strict';
  if (window.top !== window.self) return;
  if (window.GCBF26Banner && window.GCBF26Banner.version === 'local48-v2') return;
  if (window.GCBF26Banner && typeof window.GCBF26Banner.destroy === 'function') window.GCBF26Banner.destroy();

  const cfg = Object.assign({
    enabled: true,
    statePath: '/bf26-banner-check',
    pathPrefixes: [],
    desktopImage: 'https://fs.getcourse.ru/fileservice/file/download/a/35905/sc/292/h/bca224ab908ce9447df673bc6246dd6c.png',
    mobileImage: 'https://fs.getcourse.ru/fileservice/file/download/a/35905/sc/239/h/98aedd0ffadcb600ab191e6982608820.png',
    href: 'https://lunegova.ru/black26?utm_source=lk&utm_medium=chp26&utm_campaign=allpage&utm_term=presale'
  }, window.GCBF26BannerConfig || {});
  const gate = new URL(cfg.statePath, location.origin);
  if (!cfg.enabled || gate.origin !== location.origin) return;
  if (location.pathname.replace(/\/$/, '') === gate.pathname.replace(/\/$/, '')) return;
  if (/\/(edit|update)(\/|$)/.test(location.pathname)) return;
  if (cfg.pathPrefixes.length && !cfg.pathPrefixes.some(p => location.pathname.startsWith(p))) return;

  const KEY = 'lunegova_bf26_hidden_until_v2';
  const PERIOD = 48 * 60 * 60 * 1000;
  let root = null, stopped = false, refreshing = null, interval = null, wake = null;
  let memoryUntil = 0;

  function readUntil() {
    let local = 0, cookie = 0;
    try { local = Number(localStorage.getItem(KEY)) || 0; } catch (_) {}
    try {
      const match = document.cookie.split('; ').find(s => s.startsWith(KEY + '='));
      if (match) cookie = Number(decodeURIComponent(match.slice(KEY.length + 1))) || 0;
    } catch (_) {}
    return Math.max(...[local, cookie, memoryUntil].filter(n => Number.isSafeInteger(n) && n >= 0));
  }
  function savePause() {
    const until = Date.now() + PERIOD;
    memoryUntil = until;
    try {
      localStorage.setItem(KEY, String(until));
    } catch (_) {
      try {
        document.cookie = KEY + '=' + until + '; Max-Age=172800; Path=/; SameSite=Lax' + (location.protocol === 'https:' ? '; Secure' : '');
      } catch (_) {}
    }
    armWake(until);
  }
  function armWake(until) {
    clearTimeout(wake);
    if (until > Date.now()) wake = setTimeout(refresh, Math.min(until - Date.now() + 100, 2147483647));
  }
  function hide() {
    if (root) root.remove();
    root = null;
  }
  function dismiss() { savePause(); hide(); }

  function blockVisible(node, doc) {
    if (!node) return false;
    for (let el = node; el && el.nodeType === 1; el = el.parentElement) {
      const style = doc.defaultView.getComputedStyle(el);
      if (el.hidden || style.display === 'none' || style.visibility === 'hidden' ||
          style.visibility === 'collapse' || style.contentVisibility === 'hidden' || Number(style.opacity) === 0) return false;
    }
    return true;
  }
  function inSegment() {
    return new Promise(resolve => {
      const frame = document.createElement('iframe');
      frame.title = 'Проверка сегмента баннера';
      frame.tabIndex = -1;
      frame.setAttribute('aria-hidden', 'true');
      Object.assign(frame.style, {
        position: 'fixed', left: '-100000px', top: '0', border: '0', opacity: '0',
        pointerEvents: 'none', width: Math.max(320, window.innerWidth) + 'px', height: '800px'
      });
      let ended = false;
      const finish = allowed => {
        if (ended) return;
        ended = true;
        clearTimeout(timeout);
        frame.remove();
        resolve(allowed);
      };
      const timeout = setTimeout(() => finish(false), 8000);
      frame.onerror = () => finish(false);
      frame.onload = () => setTimeout(() => {
        if (ended) return;
        try {
          const doc = frame.contentDocument;
          const current = new URL(frame.contentWindow.location.href);
          const marker = doc && doc.querySelector('.gc-bf26-eligible');
          finish(current.origin === gate.origin && current.pathname.replace(/\/$/, '') === gate.pathname.replace(/\/$/, '') &&
            !!marker && blockVisible(marker, doc) && /\bBF26_ALLOWED\b/.test(marker.textContent));
        } catch (_) { finish(false); }
      }, 200);
      const url = new URL(gate);
      url.searchParams.set('_bf26', Date.now() + '-' + Math.random().toString(36).slice(2));
      frame.src = url.href;
      document.body.appendChild(frame);
    });
  }

  function render() {
    if (root || stopped) return;
    if (!document.getElementById('gc-bf26-style')) {
      const style = document.createElement('style');
      style.id = 'gc-bf26-style';
      style.textContent = `
        #gc-bf26-banner{position:fixed;left:90px;bottom:22px;width:340px;max-width:calc(100vw - 110px);z-index:100050;box-sizing:border-box}
        #gc-bf26-banner *{box-sizing:border-box}
        #gc-bf26-banner .gc-bf26-link{display:block;overflow:hidden;border-radius:18px;box-shadow:0 8px 30px #0005;line-height:0;background:#111}
        #gc-bf26-banner picture{display:block}
        #gc-bf26-banner img{display:block;width:100%;height:auto;margin:0;border:0}
        #gc-bf26-banner .gc-bf26-close{position:absolute;right:2px;top:2px;z-index:2;display:grid;place-items:center;width:44px;height:44px;padding:0;border:0;border-radius:50%;background:transparent;color:#fff;cursor:pointer}
        #gc-bf26-banner .gc-bf26-close::before{content:"";position:absolute;inset:8px;background:#0009;border-radius:50%}
        #gc-bf26-banner .gc-bf26-close svg{position:relative;width:19px;height:19px;pointer-events:none}
        #gc-bf26-banner .gc-bf26-close:hover::before{background:#111e}
        #gc-bf26-banner a:focus-visible,#gc-bf26-banner button:focus-visible{outline:3px solid #e8ff60;outline-offset:3px}
        @media(max-width:767px){#gc-bf26-banner{left:12px;bottom:calc(76px + env(safe-area-inset-bottom,0px));width:280px;max-width:calc(100vw - 24px)}#gc-bf26-banner .gc-bf26-link{border-radius:14px}}
      `;
      document.head.appendChild(style);
    }
    root = document.createElement('aside');
    root.id = 'gc-bf26-banner';
    root.setAttribute('aria-label', 'Предпродажа Чёрной пятницы');
    root.innerHTML = '<a class="gc-bf26-link"><picture><source media="(max-width:767px)"><img width="938" height="428" alt="Не ставь прогресс на паузу. Предпродажа Чёрной пятницы"></picture></a><button class="gc-bf26-close" type="button" aria-label="Закрыть баннер на 48 часов"><svg viewBox="0 0 24 24" fill="none" aria-hidden="true"><path d="M5 5L19 19M19 5L5 19" stroke="currentColor" stroke-width="2.5" stroke-linecap="round"/></svg></button>';
    const link = root.querySelector('a');
    link.href = cfg.href;
    root.querySelector('source').srcset = cfg.mobileImage;
    root.querySelector('img').src = cfg.desktopImage;
    root.querySelector('img').addEventListener('error', hide);
    const onLink = () => { savePause(); setTimeout(hide, 0); };
    link.addEventListener('click', onLink);
    link.addEventListener('auxclick', event => { if (event.button === 1) onLink(); });
    root.querySelector('button').addEventListener('click', event => {
      event.preventDefault();
      event.stopPropagation();
      dismiss();
    });
    document.body.appendChild(root);
  }

  function refresh() {
    if (stopped) return Promise.resolve();
    const until = readUntil();
    if (until > Date.now()) { hide(); armWake(until); return Promise.resolve(); }
    if (document.visibilityState === 'hidden') return Promise.resolve();
    if (refreshing) return refreshing;
    refreshing = inSegment().then(allowed => {
      if (stopped) return;
      const latest = readUntil();
      if (!allowed || latest > Date.now()) { hide(); armWake(latest); return; }
      render();
    }).finally(() => { refreshing = null; });
    return refreshing;
  }
  function onStorage(event) { if (event.key === KEY || event.key === null) refresh(); }
  function reset() {
    memoryUntil = 0;
    try { localStorage.removeItem(KEY); } catch (_) {}
    try { document.cookie = KEY + '=; Max-Age=0; Path=/; SameSite=Lax'; } catch (_) {}
    clearTimeout(wake);
    return refresh();
  }
  function destroy() {
    stopped = true;
    clearInterval(interval); clearTimeout(wake); hide();
    window.removeEventListener('focus', refresh);
    window.removeEventListener('pageshow', refresh);
    window.removeEventListener('storage', onStorage);
    document.removeEventListener('visibilitychange', refresh);
    const style = document.getElementById('gc-bf26-style');
    if (style) style.remove();
  }
  window.GCBF26Banner = { version: 'local48-v2', refresh, reset, destroy };
  function start() {
    if (stopped) return;
    refresh();
    interval = setInterval(() => { if (root) refresh(); }, 120000);
    window.addEventListener('focus', refresh);
    window.addEventListener('pageshow', refresh);
    window.addEventListener('storage', onStorage);
    document.addEventListener('visibilitychange', refresh);
  }
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', start, { once: true });
  else start();
})();