// ── M3U PARSER ────────────────────────────────────────────────────────────────
function slugify(str) {
  return str.toLowerCase()
    .replace(/^\d+\s*/, '')       // Strip any leading channel number.
    .replace(/[^a-z0-9]/g, '');   // Keep only alphanumeric characters.
}

async function loadM3U(url) {
  if (!url) {
    m3uStreams = {};
    return;
  }
  try {
    let text;
    try {
      const r = await fetch(url); text = await r.text();
    } catch(e) {
      const r = await fetch(CORS_PROXY + encodeURIComponent(url)); text = await r.text();
    }
    parseM3U(text);
  } catch(e) { console.warn('M3U load failed:', e); }
}

function parseM3U(text) {
  m3uStreams = {};
  const lines = text.split('\n');
  let currentName = null;
  for (let i = 0; i < lines.length; i++) {
    const line = lines[i].trim();
    if (line.startsWith('#EXTINF')) {
      // Extract the display name from the last comma-separated segment.
      const comma = line.lastIndexOf(',');
      currentName = comma !== -1 ? line.slice(comma + 1).trim() : null;
    } else if (line && !line.startsWith('#') && currentName) {
      m3uStreams[slugify(currentName)] = line;
      currentName = null;
    }
  }
  console.log(`M3U: ${Object.keys(m3uStreams).length} streams chargés`);
}

function getStreamUrl(channelName) {
  const slug = slugify(channelName);
  let url = null;
  if (m3uStreams[slug]) {
    url = m3uStreams[slug];
  } else {
    // Fallback: try a partial match in either direction.
    for (const [key, u] of Object.entries(m3uStreams)) {
      if (key.includes(slug) || slug.includes(key)) { url = u; break; }
    }
  }
  if (!url) return null;
  // Route plain HTTP streams through proxy.php to avoid mixed-content issues.
  if (url.startsWith('http://')) {
    return 'proxy.php?url=' + encodeURIComponent(url);
  }
  return url;
}