(() => {
  'use strict';

  const API = ''; // same origin (root -> launcher server)

  function fmtSize(bytes) {
    if (!bytes) return '—';
    const units = ['B', 'KB', 'MB', 'GB'];
    let i = 0;
    let n = bytes;
    while (n >= 1024 && i < units.length - 1) { n /= 1024; i++; }
    return n.toFixed(1) + ' ' + units[i];
  }

  async function loadLauncherInfo() {
    try {
      const res = await fetch(API + '/launcher/info');
      if (!res.ok) return;
      const data = await res.json();
      const version = data.current_version || '—';

      const heroVersion = document.getElementById('hero-version');
      const heroSize = document.getElementById('hero-size');
      const dlVersion = document.getElementById('download-version');
      const dlSize = document.getElementById('download-size');
      const dlBtn = document.getElementById('download-btn');

      if (heroVersion) heroVersion.textContent = version;
      if (dlVersion) dlVersion.textContent = version;

      if (data.files && data.files.zips && data.files.zips.length) {
        const latest = data.files.zips[0];
        if (heroSize) heroSize.textContent = fmtSize(latest.size);
        if (dlSize) dlSize.textContent = fmtSize(latest.size);
      }

      if (dlBtn && data.new_format && data.new_format.download_url) {
        dlBtn.href = API + data.new_format.download_url;
      }
    } catch (e) {
      console.warn('[site] failed to load launcher info', e);
    }
  }

  async function loadMirrors() {
    try {
      const res = await fetch(API + '/launcher/mirrors');
      if (!res.ok) return;
      const data = await res.json();
      const container = document.getElementById('mirrors');
      if (!container || !data.mirrors || !data.mirrors.length) return;

      const tags = data.mirrors.slice(0, 5).map((m) => {
        const a = document.createElement('a');
        a.className = 'mirror-tag';
        a.href = (m.url || '') + '/launcher/download/latest';
        a.textContent = m.name || m;
        return a;
      });
      tags.forEach((t) => container.appendChild(t));
    } catch (e) {
      console.warn('[site] failed to load mirrors', e);
    }
  }

  async function loadServerStatus() {
    const statusEl = document.getElementById('srv-status');
    const playersEl = document.getElementById('srv-players');
    const versionEl = document.getElementById('srv-version');
    const dot = document.querySelector('#srv-status .status-dot');
    if (!statusEl) return;

    try {
      const res = await fetch(API + '/api/status');
      const data = await res.json();

      if (data.online) {
        if (dot) dot.className = 'status-dot status-dot--online';
        statusEl.innerHTML = '<span class="status-dot status-dot--online"></span><span class="status-text--online">Online</span>';
        if (playersEl) playersEl.textContent = `${data.players_online} / ${data.players_max}`;
        if (versionEl && data.version) versionEl.textContent = data.version;
      } else {
        if (dot) dot.className = 'status-dot status-dot--offline';
        statusEl.innerHTML = '<span class="status-dot status-dot--offline"></span><span class="status-text--offline">Offline</span>';
        if (playersEl) playersEl.textContent = '— / —';
      }
    } catch (e) {
      if (dot) dot.className = 'status-dot status-dot--offline';
      statusEl.innerHTML = '<span class="status-dot status-dot--offline"></span><span>Unavailable</span>';
    }
  }

  const HIGHLIGHTS = [
    { file: '1.jpg', type: 'image', caption: 'Zern' },
    { file: '2.mp4', type: 'video', caption: null },
    { file: '3.jpg', type: 'image', caption: 'Это честно не я' },
    { file: '4.mp4', type: 'video', caption: null },
    { file: '5.jpg', type: 'image', caption: 'Спавн ТЦ (старое)' },
    { file: '6.jpg', type: 'image', caption: 'Спавн склад (старое)' },
    { file: '7.jpg', type: 'image', caption: null },
    { file: '8.jpg', type: 'image', caption: null },
    { file: '9.jpg', type: 'image', caption: null },
    { file: '10.jpg', type: 'image', caption: null },
    { file: '11.jpg', type: 'image', caption: null },
    { file: '12.jpg', type: 'image', caption: null },
    { file: '13.jpg', type: 'image', caption: null },
    { file: '14.jpg', type: 'image', caption: null },
    { file: '15.jpg', type: 'image', caption: null },
  ];

  function initCarousel() {
    const track = document.getElementById('carousel');
    const dotsWrap = document.getElementById('carouselDots');
    const prev = document.getElementById('carouselPrev');
    const next = document.getElementById('carouselNext');
    if (!track) return;

    HIGHLIGHTS.forEach((h, i) => {
      const slide = document.createElement('div');
      slide.className = 'carousel-slide';

      if (h.type === 'video') {
        const vid = document.createElement('video');
        vid.src = '/highlights/' + h.file;
        vid.controls = true;
        vid.autoplay = true;
        vid.loop = true;
        vid.muted = true;
        vid.playsInline = true;
        slide.appendChild(vid);
      } else {
        const img = document.createElement('img');
        img.src = '/highlights/' + h.file;
        img.alt = h.caption || 'Zern highlight';
        img.loading = 'lazy';
        slide.appendChild(img);
      }

      if (h.caption) {
        const cap = document.createElement('span');
        cap.className = 'carousel-caption';
        cap.textContent = h.caption;
        slide.appendChild(cap);
      }

      track.appendChild(slide);

      const dot = document.createElement('span');
      dot.className = 'carousel-dot' + (i === 0 ? ' active' : '');
      dot.addEventListener('click', () => goto(i));
      dotsWrap.appendChild(dot);
    });

    let index = 0;
    let timer = null;

    function goto(i) {
      index = (i + HIGHLIGHTS.length) % HIGHLIGHTS.length;
      track.style.transform = 'translateX(-' + index * 100 + '%)';
      dotsWrap.querySelectorAll('.carousel-dot').forEach((d, k) => {
        d.classList.toggle('active', k === index);
      });
    }

    function nextSlide() { goto(index + 1); }
    function prevSlide() { goto(index - 1); }

    function start() {
      stop();
      timer = setInterval(nextSlide, 6500);
    }
    function stop() {
      if (timer) { clearInterval(timer); timer = null; }
    }

    if (prev) prev.addEventListener('click', () => { prevSlide(); start(); });
    if (next) next.addEventListener('click', () => { nextSlide(); start(); });
    track.addEventListener('mouseenter', stop);
    track.addEventListener('mouseleave', start);

    start();
  }

  function stripMarkup(text) {
    if (!text) return '';
    return text
      .replace(/\[[^\]]*photo=[^\]]*\]/g, '')
      .replace(/\[[^\]]*\]/g, '')
      .replace(/\*\*\*/g, '')
      .replace(/\*\*/g, '')
      .replace(/[*_~`#]/g, '')
      .replace(/\n+/g, ' ')
      .trim();
  }

  async function loadNews() {
    const grid = document.getElementById('news-grid');
    if (!grid) return;

    try {
      const res = await fetch(API + '/news');
      if (!res.ok) throw new Error('news fetch failed');
      const data = await res.json();
      const news = (data.news || []).slice(0, 6);
      if (!news.length) { grid.innerHTML = '<p class="section-sub">No news yet.</p>'; return; }

      grid.innerHTML = '';
      news.forEach((n) => {
        const card = document.createElement('article');
        card.className = 'news-card';

        const tags = document.createElement('div');
        tags.className = 'news-tags';
        if (n.type) {
          const t = document.createElement('span');
          t.className = 'news-tag';
          t.textContent = n.type;
          tags.appendChild(t);
        }
        if (n.version) {
          const v = document.createElement('span');
          v.className = 'news-tag news-tag--version';
          v.textContent = n.version;
          tags.appendChild(v);
        }

        const title = document.createElement('h3');
        title.textContent = n.title || 'Update';

        const body = document.createElement('p');
        const text = stripMarkup(n.body);
        body.textContent = text.length > 220 ? text.slice(0, 220) + '…' : text;

        card.appendChild(tags);
        card.appendChild(title);
        card.appendChild(body);
        grid.appendChild(card);
      });
    } catch (e) {
      console.warn('[site] failed to load news', e);
      grid.innerHTML = '<p class="section-sub">News is temporarily unavailable.</p>';
    }
  }

  function initNav() {
    const nav = document.getElementById('nav');
    const onScroll = () => nav.classList.toggle('scrolled', window.scrollY > 24);
    window.addEventListener('scroll', onScroll, { passive: true });
    onScroll();
  }

  function initParallax() {
    const els = document.querySelectorAll('[data-parallax]');
    if (!els.length) return;
    if (window.matchMedia('(prefers-reduced-motion: reduce)').matches) return;

    const onScroll = () => {
      const y = window.scrollY;
      if (y > window.innerHeight) return;
      els.forEach((el) => {
        const speed = parseFloat(el.dataset.parallax);
        el.style.transform = 'translateY(' + (y * speed) + 'px)';
      });
    };

    window.addEventListener('scroll', onScroll, { passive: true });
    onScroll();
  }

  function initReveal() {
    const els = document.querySelectorAll('.section-head, .feature-card, .download-card, .news-card, .server-card, .theme-card, .carousel');
    if (!('IntersectionObserver' in window)) {
      els.forEach((el) => el.classList.add('visible'));
      return;
    }
    const io = new IntersectionObserver((entries) => {
      entries.forEach((entry) => {
        if (entry.isIntersecting) {
          entry.target.classList.add('visible');
          io.unobserve(entry.target);
        }
      });
    }, { threshold: 0.12 });
    els.forEach((el) => { el.classList.add('reveal'); io.observe(el); });
  }

  function initYear() {
    const el = document.getElementById('year');
    if (el) el.textContent = new Date().getFullYear();
  }

  document.addEventListener('DOMContentLoaded', () => {
    loadLauncherInfo();
    loadMirrors();
    loadNews();
    loadServerStatus();
    setInterval(loadServerStatus, 15000);
    initCarousel();
    initNav();
    initParallax();
    initReveal();
    initYear();
  });
})();