const $ = (s) => document.querySelector(s);
const filesEl = $("#files");
const jobsEl = $("#jobs");
const countEl = $("#count");
const searchEl = $("#search");
const modal = $("#modal");

let currentFile = null;      // fichier sélectionné pour conversion
let searchTimer = null;

// ---------- Helpers ----------
function human(bytes) {
  if (!bytes && bytes !== 0) return "";
  const u = ["o", "Ko", "Mo", "Go", "To"];
  let i = 0, n = bytes;
  while (n >= 1024 && i < u.length - 1) { n /= 1024; i++; }
  return `${n.toFixed(n >= 10 || i === 0 ? 0 : 1)} ${u[i]}`;
}
const langName = { fre: "FR", fra: "FR", fr: "FR", eng: "EN", en: "EN", und: "?" };

// ---------- Recherche / listing ----------
// Redirige vers la connexion si la session a expiré
function checkAuth(r) {
  if (r.status === 401) { window.location = "/login"; return false; }
  return true;
}

async function loadFiles(q = "") {
  const r = await fetch(`/api/browse?q=${encodeURIComponent(q)}`);
  if (!checkAuth(r)) return;
  const data = await r.json();
  countEl.textContent = data.count
    ? `${data.count} fichier${data.count > 1 ? "s" : ""}${data.truncated ? "+" : ""}`
    : "aucun résultat";
  filesEl.innerHTML = "";
  if (!data.files.length) {
    filesEl.innerHTML = `<li class="empty">Rien trouvé.</li>`;
    return;
  }
  for (const f of data.files) {
    const li = document.createElement("li");
    li.className = "file";
    const dir = f.dir && f.dir !== "." ? `<span class="dir">${f.dir}/</span>` : "";
    li.innerHTML = `
      <div class="file-main">
        <div class="file-name">${dir}${f.name}</div>
        <div class="file-meta">${human(f.size)}</div>
      </div>
      <div class="file-actions">
        <a class="btn ghost" href="/api/download?path=${encodeURIComponent(f.path)}">⬇ Télécharger</a>
        <button class="btn primary conv">🎬 Convertir en AVI</button>
      </div>`;
    li.querySelector(".conv").addEventListener("click", () => openModal(f));
    filesEl.appendChild(li);
  }
}

searchEl.addEventListener("input", () => {
  clearTimeout(searchTimer);
  searchTimer = setTimeout(() => loadFiles(searchEl.value), 250);
});

// ---------- Modale d'options ----------
async function openModal(file) {
  currentFile = file;
  $("#modal-title").textContent = file.name;
  const info = $("#modal-info");
  const audioSel = $("#opt-audio");
  info.textContent = "Analyse du fichier…";
  audioSel.innerHTML = "";
  modal.classList.remove("hidden");

  try {
    const r = await fetch(`/api/probe?path=${encodeURIComponent(file.path)}`);
    if (!r.ok) throw new Error((await r.json()).detail || "erreur");
    const p = await r.json();
    const badges = [];
    if (p.width) badges.push(`${p.width}×${p.height}`);
    if (p.hdr) badges.push(`<span class="tag hdr">HDR → tone-mapping</span>`);
    badges.push(`${Math.round(p.duration / 60)} min`);
    info.innerHTML = badges.join(" · ");

    p.audio.forEach((a) => {
      const opt = document.createElement("option");
      const lang = langName[a.lang] || a.lang.toUpperCase();
      const ch = a.channels ? `${a.channels}ch` : "";
      opt.value = a.a_index;
      opt.textContent = `#${a.a_index} · ${lang} · ${a.codec} ${ch}${a.title ? " — " + a.title : ""}`;
      if (a.a_index === p.default_audio) opt.selected = true;
      audioSel.appendChild(opt);
    });
    if (!p.audio.length) {
      audioSel.innerHTML = `<option value="0">(aucune piste audio détectée)</option>`;
    }
  } catch (e) {
    info.innerHTML = `<span class="err">Impossible d'analyser : ${e.message}</span>`;
  }
}

$("#modal-cancel").addEventListener("click", () => modal.classList.add("hidden"));
modal.addEventListener("click", (e) => { if (e.target === modal) modal.classList.add("hidden"); });

$("#modal-start").addEventListener("click", async () => {
  if (!currentFile) return;
  const body = {
    path: currentFile.path,
    resolution: $("#opt-res").value,
    audio: parseInt($("#opt-audio").value || "0", 10),
  };
  modal.classList.add("hidden");
  const r = await fetch("/api/convert", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(body),
  });
  if (r.ok) { await refreshJobs(); }
  else { alert("Erreur : " + ((await r.json()).detail || r.status)); }
});

// ---------- Jobs / progression ----------
function jobRow(j) {
  const li = document.createElement("li");
  li.className = `job ${j.status}`;
  let right = "";
  if (j.status === "done") {
    right = `<a class="btn primary" href="/api/result/${j.id}">⬇ Télécharger l'AVI</a>
             <button class="btn ghost small del">✕</button>`;
  } else if (j.status === "error") {
    right = `<button class="btn ghost small del">✕</button>`;
  } else {
    right = `<button class="btn ghost small del">Annuler</button>`;
  }
  const statusTxt = {
    queued: "En attente…", running: "Conversion…", done: `Terminé · ${human(j.size)}`,
    error: "Échec", }[j.status] || j.status;
  li.innerHTML = `
    <div class="job-head">
      <span class="job-name">${j.source}</span>
      <span class="job-status">${statusTxt}${j.hdr ? " · HDR" : ""}</span>
    </div>
    <div class="bar"><div class="bar-fill" style="width:${j.progress || 0}%"></div></div>
    <div class="job-actions">${right}</div>`;
  if (j.status === "error") {
    const d = document.createElement("div");
    d.className = "job-err";
    d.textContent = (j.error || "").split("\n").filter(Boolean).slice(-1)[0] || "Erreur inconnue";
    li.appendChild(d);
  }
  const del = li.querySelector(".del");
  if (del) del.addEventListener("click", async () => {
    await fetch(`/api/jobs/${j.id}`, { method: "DELETE" });
    refreshJobs();
  });
  return li;
}

async function refreshJobs() {
  const r = await fetch("/api/jobs");
  if (!checkAuth(r)) return;
  const { jobs } = await r.json();
  jobsEl.innerHTML = "";
  if (!jobs.length) {
    jobsEl.innerHTML = `<li class="empty">Aucune conversion pour l'instant.</li>`;
    return;
  }
  jobs.forEach((j) => jobsEl.appendChild(jobRow(j)));
}

// Poll régulier des jobs
setInterval(refreshJobs, 1500);

// ---------- Utilisateur connecté ----------
async function loadUser() {
  try {
    const r = await fetch("/api/me");
    const d = await r.json();
    if (d.auth && d.user) {
      $("#user-name").textContent = `👤 ${d.user.name}`;
      $("#user").classList.remove("hidden");
    }
  } catch { /* ignore */ }
}

// Init
loadUser();
loadFiles();
refreshJobs();