// ===== Dark mode toggle =====
(function () {
  const KEY = 'lv-theme';
  const root = document.documentElement;
  function apply(theme) {
    if (theme === 'dark') root.setAttribute('data-theme', 'dark');
    else root.removeAttribute('data-theme');
    document.querySelectorAll('.theme-toggle').forEach(b => b.setAttribute('aria-pressed', theme === 'dark'));
  }
  const saved = localStorage.getItem(KEY);
  if (saved) apply(saved);
  document.addEventListener('click', (e) => {
    const btn = e.target.closest('.theme-toggle');
    if (!btn) return;
    const next = root.getAttribute('data-theme') === 'dark' ? 'light' : 'dark';
    localStorage.setItem(KEY, next);
    apply(next);
  });
})();

// ===== Boot screen =====
(function () {
  const boot = document.getElementById('boot');
  if (!boot) return;
  const reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
  if (reduce || sessionStorage.getItem('lv-boot-seen')) {
    boot.remove();
    return;
  }
  const safety = setTimeout(() => { try { boot.remove(); } catch {} }, 6000);
  const target = boot.querySelector('.boot__text');
  const lines = [
    '> initializing mostuki photo studio . . .',
    '> loading typography: JetBrainsMono v2.304 . . . OK',
    '> loading palette: ink #0a0a0a / paper #f4f1eb / accent #5e2ca5 . . . OK',
    '> resolving photographer.heart . . . OK',
    '> serving since 2018 . . . OK',
    '> ready.',
  ];
  let i = 0, j = 0, buf = '';
  function step() {
    if (i >= lines.length) {
      setTimeout(() => {
        boot.classList.add('is-done');
        setTimeout(() => { boot.remove(); clearTimeout(safety); }, 600);
        sessionStorage.setItem('lv-boot-seen', '1');
      }, 250);
      return;
    }
    const line = lines[i];
    if (j <= line.length) {
      target.textContent = buf + line.slice(0, j);
      j++;
      setTimeout(step, 12);
    } else {
      buf += line + '\n';
      i++; j = 0;
      setTimeout(step, 90);
    }
  }
  boot.classList.add('is-active');
  step();
})();

// ===== Konami code -> VHS mode toggle =====
(function () {
  const SEQ = ['ArrowUp','ArrowUp','ArrowDown','ArrowDown','ArrowLeft','ArrowRight','ArrowLeft','ArrowRight','b','a'];
  let i = 0;
  function showBanner(active) {
    let b = document.getElementById('vhs-banner');
    if (!b) {
      b = document.createElement('div');
      b.id = 'vhs-banner';
      b.className = 'vhs-banner';
      b.setAttribute('role', 'status');
      b.setAttribute('aria-live', 'polite');
      document.body.appendChild(b);
    }
    b.textContent = active ? '> VHS MODE ENABLED. PRESS KONAMI AGAIN TO DISABLE.' : '> VHS MODE DISABLED.';
    b.classList.add('is-visible');
    setTimeout(() => b.classList.remove('is-visible'), 3500);
  }
  function toggleVHS() {
    const active = document.body.classList.toggle('vhs-mode');
    const logo = document.querySelector('.logo');
    if (logo) {
      if (active) {
        logo.dataset.original = logo.dataset.original || logo.innerHTML;
        logo.innerHTML = '[ MOSTUKI_v1.4.2-rc.1<span class="cursor" aria-hidden="true">▌</span> ]';
      } else if (logo.dataset.original) {
        logo.innerHTML = logo.dataset.original;
      }
    }
    showBanner(active);
  }
  window.addEventListener('keydown', (e) => {
    const want = SEQ[i];
    const got = e.key.length === 1 ? e.key.toLowerCase() : e.key;
    if (got === want.toLowerCase()) {
      i++;
      if (i === SEQ.length) { toggleVHS(); i = 0; }
    } else {
      i = (got === SEQ[0].toLowerCase()) ? 1 : 0;
    }
  });
})();