const $ = selector => document.querySelector(selector);
const all = selector => document.querySelectorAll(selector);
const storage = {
  get(key, fallback = '') { try { return localStorage.getItem(`caria.${key}`) ?? fallback; } catch { return fallback; } },
  set(key, value) { try { localStorage.setItem(`caria.${key}`, value); return true; } catch { return false; } }
};
function toast(message) { $('#toast').textContent = message; $('#toast').hidden = false; clearTimeout(toast.timer); toast.timer = setTimeout(() => $('#toast').hidden = true, 4000); }
function navigate() {
  const view = ['home', 'drive', 'music', 'stream'].includes(location.hash.slice(1)) ? location.hash.slice(1) : 'home';
  all('.view').forEach(section => section.hidden = section.id !== view);
  all('[data-view]').forEach(link => {
    const active = link.dataset.view === view;
    link.classList.toggle('active', active);
    if (active) link.setAttribute('aria-current', 'page'); else link.removeAttribute('aria-current');
  });
  document.title = `CARIA · ${$(`[data-view="${view}"]`).textContent.trim()}`;
}
window.addEventListener('hashchange', navigate);
navigate();

function clock() {
  const date = new Date();
  const time = date.toLocaleTimeString('fr-FR', { hour: '2-digit', minute: '2-digit' });
  ['#hero-clock', '#header-clock'].forEach(id => { $(id).textContent = time; $(id).dateTime = date.toISOString(); });
  $('#date').textContent = date.toLocaleDateString('fr-FR', { weekday: 'long', day: 'numeric', month: 'long', year: 'numeric' });
}
clock(); setInterval(clock, 1000);

function makeGauge(id, max, step, unit, label) {
  const point = (angle, radius) => {
    const r = angle * Math.PI / 180;
    return [150 + radius * Math.sin(r), 150 - radius * Math.cos(r)];
  };
  let ticks = '';
  for (let v = 0; v <= max; v += step / 4) {
    const angle = -130 + v / max * 260;
    const major = v % step === 0;
    const a = point(angle, major ? 112 : 119), b = point(angle, 126), n = point(angle, 97);
    ticks += `<line class="tick ${major ? 'major' : ''}" x1="${a[0]}" y1="${a[1]}" x2="${b[0]}" y2="${b[1]}"/>`;
    if (major) ticks += `<text x="${n[0]}" y="${n[1] + 4}">${max === 7000 ? v / 1000 : v}</text>`;
  }
  $(id).innerHTML = `<svg viewBox="0 0 300 285" role="img" aria-label="${label} : en attente"><circle cx="150" cy="150" r="133" fill="none" stroke="var(--border)"/>${ticks}<text x="150" y="110" class="dial-label">${unit}</text><line class="needle" x1="150" y1="150" x2="150" y2="43" style="transform-origin:150px 150px;transform:rotate(-130deg)"/><circle cx="150" cy="150" r="7" fill="var(--accent)"/><circle cx="150" cy="150" r="3" fill="var(--surface)"/><text x="150" y="212" class="dial-value">—</text><text x="150" y="239" class="dial-label">${label}</text></svg>`;
  return value => {
    const valid = typeof value === 'number' && Number.isFinite(value);
    $(`${id} .dial-value`).textContent = valid ? Math.round(value).toLocaleString('fr-FR') : '—';
    $(`${id} .needle`).style.opacity = valid ? '1' : '0';
    if (valid) $(`${id} .needle`).style.transform = `rotate(${-130 + Math.max(0, Math.min(max, value)) / max * 260}deg)`;
    $(`${id} svg`).setAttribute('aria-label', `${label} : ${valid ? Math.round(value) : 'indisponible'} ${max === 7000 ? 'tr/min' : 'km/h'}`);
  };
}
const speedGauge = makeGauge('#speed-gauge', 220, 20, 'KM/H', 'VITESSE');
const rpmGauge = makeGauge('#rpm-gauge', 7000, 1000, '× 1 000 TR/MIN', 'RÉGIME MOTEUR');
const savedProfile = storage.get('profile', 'route');
$('#profile').value = ['route', 'ville', 'arret'].includes(savedProfile) ? savedProfile : 'route';
let generation = 0, timer;
function offline() {
  $('#connection').textContent = 'Données indisponibles';
  $('#connection').classList.add('error');
  $('#footer-status').textContent = 'Connexion perdue · tentative de reconnexion';
  document.body.classList.add('stale');
  all('[data-value]').forEach(el => el.textContent = '—');
  all('[data-fuel]').forEach(el => el.style.width = '0%');
  speedGauge(null); rpmGauge(null);
}
async function poll() {
  const current = ++generation;
  clearTimeout(timer);
  try {
    const response = await fetch(`/api/telemetry?profile=${encodeURIComponent($('#profile').value)}`, { signal: AbortSignal.timeout(3000), cache: 'no-store' });
    if (!response.ok) throw new Error('API');
    const data = await response.json();
    if (current !== generation) return;
    const numeric = ['speedKph', 'rpm', 'fuelPercent', 'coolantCelsius', 'batteryVolts', 'outsideCelsius', 'rangeKm', 'tripKm', 'consumptionL100'];
    if (data.schemaVersion !== 1 || data.source !== 'demo' || !Number.isFinite(data.timestamp) || Math.abs(Date.now() - data.timestamp) > 10000 || numeric.some(key => !Number.isFinite(data[key]))) throw new Error('Données invalides');
    $('#connection').textContent = '● Démonstration';
    $('#connection').classList.remove('error');
    document.body.classList.remove('stale');
    $('#footer-status').textContent = 'Mode démonstration · CAN non connecté';
    all('[data-value]').forEach(el => {
      const value = data[el.dataset.value];
      el.textContent = typeof value === 'number' ? value.toLocaleString('fr-FR', { maximumFractionDigits: 1 }) : value;
    });
    all('[data-fuel]').forEach(el => el.style.width = `${Math.max(0, Math.min(100, data.fuelPercent))}%`);
    speedGauge(data.speedKph); rpmGauge(data.rpm);
  } catch { if (current === generation) offline(); }
  finally { if (current === generation) timer = setTimeout(poll, 500); }
}
$('#profile').addEventListener('change', () => { storage.set('profile', $('#profile').value); poll(); });
window.addEventListener('storage', event => {
  if (event.key === 'caria.profile' && ['route', 'ville', 'arret'].includes(event.newValue)) { $('#profile').value = event.newValue; poll(); }
  if (event.key === 'caria.stream') configureStream();
  if (event.key === 'caria.theme') document.body.classList.toggle('light', event.newValue === 'light');
});
poll();

function validUrl(value) {
  try { const url = new URL(value); return ['http:', 'https:'].includes(url.protocol) && !url.username && !url.password ? url.href : ''; } catch { return ''; }
}
const defaultStream = 'https://media.cunatbrule.fr/web/';
function configureStream() {
  const url = validUrl(storage.get('stream', defaultStream));
  $('#stream-link').hidden = !url;
  if (url) $('#stream-link').href = url; else $('#stream-link').removeAttribute('href');
  $('#stream-description').textContent = url ? new URL(url).hostname : 'Ajoutez l’adresse de votre site dans les réglages.';
  $('#stream-configure').textContent = url ? 'Modifier le site' : 'Configurer mon site';
}
configureStream();
document.body.classList.toggle('light', storage.get('theme') === 'light');
function openSettings() {
  $('#stream-url').value = storage.get('stream', defaultStream);
  $('#theme').value = document.body.classList.contains('light') ? 'light' : 'dark';
  $('#settings-message').textContent = '';
  $('#settings').showModal();
}
$('#settings-open').onclick = openSettings;
$('#stream-configure').onclick = openSettings;
$('#settings-close').onclick = () => $('#settings').close();
$('#settings-form').addEventListener('submit', event => {
  event.preventDefault();
  const raw = $('#stream-url').value.trim(), url = validUrl(raw);
  if (raw && !url) { $('#settings-message').textContent = 'Saisissez une adresse HTTP ou HTTPS, sans identifiant ni mot de passe.'; return; }
  const streamSaved = storage.set('stream', url), themeSaved = storage.set('theme', $('#theme').value);
  if (!streamSaved || !themeSaved) { $('#settings-message').textContent = 'Le navigateur bloque l’enregistrement local des réglages.'; return; }
  document.body.classList.toggle('light', $('#theme').value === 'light');
  configureStream(); $('#settings').close(); toast('Réglages enregistrés');
});
$('#fullscreen').onclick = async () => {
  try { if (document.fullscreenElement) await document.exitFullscreen(); else await document.documentElement.requestFullscreen(); }
  catch { toast('Le plein écran n’est pas disponible dans ce navigateur.'); }
};

const audio = $('#audio');
let tracks = [], selected = -1;
function renderPlaylist() {
  $('#playlist').replaceChildren();
  tracks.forEach((track, index) => {
    const li = document.createElement('li'), button = document.createElement('button');
    const number = document.createElement('span'), name = document.createElement('b');
    number.textContent = String(index + 1).padStart(2, '0'); name.textContent = track.name;
    button.append(number, name); button.classList.toggle('selected', index === selected);
    button.setAttribute('aria-pressed', String(index === selected)); button.onclick = () => selectTrack(index, true);
    li.append(button); $('#playlist').append(li);
  });
  $('#track-count').textContent = `${tracks.length} TITRE${tracks.length > 1 ? 'S' : ''}`;
  $('#empty-library').hidden = tracks.length > 0;
  ['#play', '#previous', '#next'].forEach(id => $(id).disabled = tracks.length === 0);
}
async function playAudio() {
  try { await audio.play(); $('#audio-message').textContent = 'Lecture locale · aucun fichier envoyé au serveur.'; }
  catch { $('#audio-message').textContent = 'Lecture impossible : réessayez ou choisissez un format audio pris en charge.'; }
}
function selectTrack(index, play = false) {
  if (!tracks.length) return;
  selected = (index + tracks.length) % tracks.length;
  audio.src = tracks[selected].url;
  $('#track-title').textContent = tracks[selected].name;
  $('#home-track').textContent = tracks[selected].name;
  $('#track-subtitle').textContent = `Morceau ${selected + 1} sur ${tracks.length} · Bibliothèque locale`;
  $('#home-track-sub').textContent = 'Bibliothèque locale';
  renderPlaylist(); if (play) playAudio();
}
$('#music-files').addEventListener('change', event => {
  let added = 0;
  for (const file of event.target.files) {
    if (!file.type.startsWith('audio/') && !/\.(mp3|flac|ogg|wav|m4a|aac|opus)$/i.test(file.name)) continue;
    tracks.push({ name: file.name.replace(/\.[^.]+$/, ''), url: URL.createObjectURL(file) }); added++;
  }
  renderPlaylist();
  if (selected === -1 && tracks.length) selectTrack(0);
  toast(added ? `${added} morceau${added > 1 ? 'x' : ''} ajouté${added > 1 ? 's' : ''}` : 'Aucun fichier audio reconnu');
  event.target.value = '';
});
$('#play').onclick = () => { if (selected === -1) return; if (audio.paused) playAudio(); else audio.pause(); };
$('#previous').onclick = () => selectTrack(selected - 1, true);
$('#next').onclick = () => selectTrack(selected + 1, true);
audio.addEventListener('play', () => $('#play').textContent = 'Pause');
audio.addEventListener('pause', () => $('#play').textContent = 'Lecture');
audio.addEventListener('ended', () => { if (selected + 1 < tracks.length) selectTrack(selected + 1, true); else $('#play').textContent = 'Lecture'; });
audio.addEventListener('error', () => $('#audio-message').textContent = 'Ce fichier ne peut pas être lu. Essayez un autre format audio.');
window.addEventListener('pagehide', event => { if (!event.persisted) tracks.forEach(track => URL.revokeObjectURL(track.url)); });
renderPlaylist();