// Echapper les donnees issues de l'EPG pour eviter les injections HTML
function esc(str) {
  const d = document.createElement('div');
  d.textContent = str || '';
  return d.innerHTML;
}

let channels = [];
let programs = {};
let m3uStreams = {}; // slug normalisé → url stream
let scrollListenerAdded = false; // sync scroll vertical chaînes

function pad(n) { return String(n).padStart(2,'0'); }

function copyUrl(type) {
  const url = type === 'epg' ? currentEpgUrl : currentM3uUrl;
  if (!url) return;
  navigator.clipboard.writeText(url).then(() => {
    const btns = document.querySelectorAll('.copy-btn');
    btns.forEach(b => { if (b.textContent.toLowerCase() === type) {
      b.textContent = L.copied;
      b.classList.add('copied');
      setTimeout(() => { b.textContent = type.toUpperCase(); b.classList.remove('copied'); }, 1800);
    }});
  }).catch(() => {
    prompt(url, url);
  });
}
function fmtTime(d) { return `${pad(d.getHours())}:${pad(d.getMinutes())}`; }
function fmtTimeFull(d) { return `${pad(d.getHours())}:${pad(d.getMinutes())}:${pad(d.getSeconds())}`; }
function isMobile() { return window.innerWidth <= 600; }

function parseXMLTVDate(str) {
  if (!str) return null;
  const m = str.match(/^(\d{4})(\d{2})(\d{2})(\d{2})(\d{2})(\d{2})\s*([+-]\d{4})?/);
  if (!m) return null;
  const offset = m[7] ? parseInt(m[7]) : 0;
  const offsetMs = (Math.floor(Math.abs(offset)/100)*60 + (Math.abs(offset)%100)) * 60000 * (offset<0?-1:1);
  return new Date(Date.UTC(+m[1],+m[2]-1,+m[3],+m[4],+m[5],+m[6]) - offsetMs);
}

function updateClock() {
  const now = new Date();
  document.getElementById('clock').textContent = fmtTimeFull(now);
  document.getElementById('dateLabel').textContent =
    `${L.days[now.getDay()]} ${now.getDate()} ${L.months[now.getMonth()]} ${now.getFullYear()}`;
}
setInterval(updateClock, 1000);
updateClock();

async function fetchXML(url) {
  const res = await fetch(url);
  if (!res.ok) throw new Error(`HTTP ${res.status}`);
  return new DOMParser().parseFromString(await res.text(), 'text/xml');
}

async function loadEPG(url) {
  document.getElementById('loading').style.display = 'flex';
  document.getElementById('errorMsg').style.display = 'none';
  try {
    let doc;
    try { doc = await fetchXML(url); }
    catch(e) { doc = await fetchXML(CORS_PROXY + encodeURIComponent(url)); }
    parseAndRender(doc);
    document.getElementById('loading').style.display = 'none';
  } catch(e) {
    document.getElementById('loading').style.display = 'none';
    document.getElementById('errorMsg').style.display = 'flex';
    document.getElementById('errorDetail').textContent = `${L.epg_error_sub} (${e.message})`;
    document.getElementById('epgInput').value = url;
  }
}

function loadFromInput() {
  const url = document.getElementById('epgInput').value.trim();
  if (url) loadEPG(url);
}

function parseEpisode(p) {
  // Format xmltv_ns : "S.E.part" (0-indexed) ex: "0.2.0/1" = S01E03
  const ns = p.querySelector('episode-num[system="xmltv_ns"]')?.textContent;
  if (ns) {
    const parts = ns.split('.');
    const s = parts[0] !== undefined && parts[0].trim() !== '' ? parseInt(parts[0].trim()) + 1 : null;
    const ePart = parts[1] !== undefined ? parts[1].trim().split('/')[0] : '';
    const e = ePart !== '' ? parseInt(ePart) + 1 : null;
    if (s !== null || e !== null) return { season: s, episode: e };
  }
  // Format onscreen : "S01E03" ou "s1e3"
  const os = p.querySelector('episode-num[system="onscreen"]')?.textContent;
  if (os) {
    const m = os.match(/[Ss](\d+)[Ee](\d+)/);
    if (m) return { season: parseInt(m[1]), episode: parseInt(m[2]) };
    const m2 = os.match(/[Ee][Pp]?\s*(\d+)/i);
    if (m2) return { season: null, episode: parseInt(m2[1]) };
  }
  return { season: null, episode: null };
}

function fmtEpisode(season, episode) {
  if (season !== null && episode !== null) return `S${String(season).padStart(2,'0')}E${String(episode).padStart(2,'0')}`;
  if (episode !== null) return `E${String(episode).padStart(2,'0')}`;
  return null;
}

function parseAndRender(doc) {
  channels = []; programs = {};
  doc.querySelectorAll('channel').forEach(ch => {
    const id = ch.getAttribute('id');
    const name = ch.querySelector('display-name')?.textContent || id;
    const icon = ch.querySelector('icon')?.getAttribute('src') || null;
    const num = parseInt(name.match(/^(\d+)/)?.[1] ?? '9999');
    channels.push({ id, name, icon, num });
    programs[id] = [];
  });
  channels.sort((a,b) => a.num - b.num);

  doc.querySelectorAll('programme').forEach(p => {
    const chId = p.getAttribute('channel');
    if (!programs[chId]) programs[chId] = [];
    const start = parseXMLTVDate(p.getAttribute('start'));
    const stop  = parseXMLTVDate(p.getAttribute('stop'));
    const title = p.querySelector('title')?.textContent || '';
    const desc  = p.querySelector('desc')?.textContent  || '';
    const epInfo = parseEpisode(p);
    if (start && stop) programs[chId].push({ start, stop, title, desc, ...epInfo });
  });
  Object.keys(programs).forEach(id => programs[id].sort((a,b) => a.start - b.start));

  renderAll();
  startLiveUpdates();
}

function renderAll() {
  if (isMobile()) { renderMobile(); }
  else { renderGrid(); setTimeout(centerNow, 150); }
}