// ─── DOM-Refs ──────────────────────────────────────────────────────────────
const form = document.getElementById("upload-form");
const titleInput = document.getElementById("title");
const audioInput = document.getElementById("audio");
const submitBtn = document.getElementById("submit-btn");
const uploadProgress = document.getElementById("upload-progress");
const uploadBar = uploadProgress.querySelector(".bar-fill");
const uploadMsg = document.getElementById("upload-msg");
const jobsBody = document.getElementById("jobs-body");
const macStatus = document.getElementById("mac-status");

const appMain = document.getElementById("app");
const authOverlay = document.getElementById("auth-overlay");
const authTitle = document.getElementById("auth-title");
const authInfo = document.getElementById("auth-info");
const authForm = document.getElementById("auth-form");
const authUsername = document.getElementById("auth-username");
const authPassword = document.getElementById("auth-password");
const authSubmit = document.getElementById("auth-submit");
const authMsg = document.getElementById("auth-msg");
const userBar = document.getElementById("user-bar");
const userName = document.getElementById("user-name");
const userAdminBadge = document.getElementById("user-admin-badge");
const logoutBtn = document.getElementById("logout-btn");

const adminCard = document.getElementById("admin-card");
const userForm = document.getElementById("user-form");
const newUsername = document.getElementById("new-username");
const newPassword = document.getElementById("new-password");
const newIsAdmin = document.getElementById("new-is-admin");
const userMsg = document.getElementById("user-msg");
const usersBody = document.getElementById("users-body");

const profileLabel = document.getElementById("profile-label");
const profileSelect = document.getElementById("profile-select");
const defaultProfileName = document.getElementById("default-profile-name");
const headerProfileWrap = document.getElementById("header-profile-wrap");
const headerProfile = document.getElementById("header-profile");

const recordToggle = document.getElementById("record-toggle");
const recordToggleLabel = document.getElementById("record-toggle-label");
const recordPane = document.getElementById("record-pane");
const recordTimer = document.getElementById("record-timer");
const recordStatus = document.getElementById("record-status");
const recPauseBtn = document.getElementById("rec-pause");
const recStopBtn = document.getElementById("rec-stop");
const recordResult = document.getElementById("record-result");
const recordFilename = document.getElementById("record-filename");
const recordDiscardBtn = document.getElementById("record-discard");

let currentUser = null; // { id, username, is_admin, default_profile }
let mode = "login";     // "login" | "setup"
let availableProfiles = []; // [{ name, display_name, language }, ...]

const DOWNLOADS = [
  { kind: "docx",       label: "DOCX",       title: "Sitzungsprotokoll als Word-Dokument" },
  { kind: "protocol",   label: "Protokoll",  title: "Strukturiertes Protokoll (JSON)" },
  { kind: "summary",    label: "Summary",    title: "Zusammenfassung (JSON)" },
  { kind: "transcript", label: "Transkript", title: "Rohes Transkript (JSON)" },
];

// ─── Helpers ───────────────────────────────────────────────────────────────
function escapeHtml(s) {
  return String(s ?? "").replace(/[&<>"']/g, (c) => ({
    "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;",
  }[c]));
}

function fmtDate(s) {
  const d = new Date(s);
  return d.toLocaleString("de-DE", { dateStyle: "short", timeStyle: "medium" });
}

async function api(path, opts = {}) {
  const r = await fetch(path, {
    credentials: "same-origin",
    headers: { "Content-Type": "application/json", ...(opts.headers || {}) },
    ...opts,
  });
  return r;
}

// ─── Auth-Flow ─────────────────────────────────────────────────────────────
async function bootstrap() {
  const me = await api("/api/auth/me");
  if (me.ok) {
    currentUser = await me.json();
    enterApp();
    return;
  }
  // Nicht eingeloggt — Setup nötig?
  const setupCheck = await api("/api/auth/needs-setup");
  const setupData = await setupCheck.json();
  if (setupData.needs_setup) {
    showAuth("setup");
  } else {
    showAuth("login");
  }
}

function showAuth(which) {
  mode = which;
  authMsg.textContent = "";
  authMsg.className = "msg";
  authForm.reset();
  if (which === "setup") {
    authTitle.textContent = "Initialen Admin anlegen";
    authInfo.textContent =
      "Noch kein Benutzer vorhanden. Lege jetzt den ersten Admin an. Bestehende Jobs werden diesem Konto zugeordnet.";
    authInfo.classList.remove("hidden");
    authPassword.autocomplete = "new-password";
    authPassword.minLength = 8;
    authSubmit.textContent = "Admin anlegen";
  } else {
    authTitle.textContent = "Anmelden";
    authInfo.classList.add("hidden");
    authInfo.textContent = "";
    authPassword.autocomplete = "current-password";
    authPassword.minLength = 1;
    authSubmit.textContent = "Anmelden";
  }
  authOverlay.classList.remove("hidden");
  appMain.classList.add("hidden");
  userBar.classList.add("hidden");
  setTimeout(() => authUsername.focus(), 50);
}

function enterApp() {
  authOverlay.classList.add("hidden");
  appMain.classList.remove("hidden");
  userBar.classList.remove("hidden");
  userName.textContent = currentUser.username;
  userAdminBadge.classList.toggle("hidden", !currentUser.is_admin);
  adminCard.classList.toggle("hidden", !currentUser.is_admin);
  loadProfiles().then(applyProfileUI);
  loadJobs();
  if (currentUser.is_admin) loadUsers();
}

async function loadProfiles() {
  try {
    const r = await api("/api/profiles");
    if (!r.ok) return;
    const data = await r.json();
    availableProfiles = data.profiles || [];
  } catch (e) {
    console.error("Profile laden fehlgeschlagen", e);
    availableProfiles = [];
  }
}

function profileLabelOf(name) {
  const p = availableProfiles.find((x) => x.name === name);
  return p ? p.display_name : name;
}

function applyProfileUI() {
  // Upload-Dropdown und Header-Selector nur sichtbar wenn ≥2 Profile.
  const showDropdown = availableProfiles.length > 1;
  profileLabel.classList.toggle("hidden", !showDropdown);
  headerProfileWrap.classList.toggle("hidden", !showDropdown);

  for (const sel of [profileSelect, headerProfile]) {
    sel.innerHTML = "";
    availableProfiles.forEach((p) => {
      const o = document.createElement("option");
      o.value = p.name;
      o.textContent = p.display_name;
      sel.appendChild(o);
    });
  }
  const def = currentUser.default_profile || "meeting";
  profileSelect.value = def;
  headerProfile.value = def;
  defaultProfileName.textContent = profileLabelOf(def);
}

// Sofort-Speichern, sobald der User im Header das Standard-Profil ändert.
headerProfile.addEventListener("change", async () => {
  const newDefault = headerProfile.value;
  headerProfile.disabled = true;
  try {
    const r = await api("/api/auth/me", {
      method: "PATCH",
      body: JSON.stringify({ default_profile: newDefault }),
    });
    if (!r.ok) throw new Error("save failed");
    currentUser = await r.json();
    // Upload-Dropdown synchron mitziehen
    profileSelect.value = currentUser.default_profile;
    defaultProfileName.textContent = profileLabelOf(currentUser.default_profile);
  } catch (e) {
    alert("Konnte Standard-Profil nicht speichern.");
    headerProfile.value = currentUser.default_profile || "meeting";
  } finally {
    headerProfile.disabled = false;
  }
});

authForm.addEventListener("submit", async (ev) => {
  ev.preventDefault();
  authSubmit.disabled = true;
  authMsg.textContent = "";
  authMsg.className = "msg";
  const body = JSON.stringify({
    username: authUsername.value.trim(),
    password: authPassword.value,
  });
  const url = mode === "setup" ? "/api/auth/setup" : "/api/auth/login";
  try {
    const r = await api(url, { method: "POST", body });
    const data = await r.json();
    if (!r.ok) {
      authMsg.textContent = data.detail || "Fehler bei der Anmeldung";
      authMsg.className = "msg err";
      return;
    }
    currentUser = data;
    if (mode === "setup" && typeof data.migrated_jobs === "number" && data.migrated_jobs > 0) {
      console.info(`${data.migrated_jobs} Bestand-Jobs wurden zugeordnet.`);
    }
    enterApp();
  } catch (e) {
    authMsg.textContent = "Netzwerkfehler";
    authMsg.className = "msg err";
  } finally {
    authSubmit.disabled = false;
  }
});

logoutBtn.addEventListener("click", async () => {
  await api("/api/auth/logout", { method: "POST" });
  currentUser = null;
  jobsBody.innerHTML = "";
  showAuth("login");
});

// ─── Mac-Status ────────────────────────────────────────────────────────────
async function checkMac() {
  try {
    const r = await fetch("/api/mac/health");
    const j = await r.json();
    if (r.ok && j.reachable) {
      macStatus.textContent = "Mac-Backend: online";
      macStatus.classList.add("ok");
      macStatus.classList.remove("err");
    } else {
      macStatus.textContent = "Mac-Backend: nicht erreichbar";
      macStatus.classList.add("err");
      macStatus.classList.remove("ok");
    }
  } catch {
    macStatus.textContent = "Mac-Backend: Fehler";
    macStatus.classList.add("err");
  }
}

// ─── Jobs ──────────────────────────────────────────────────────────────────
function row(job) {
  const tr = document.createElement("tr");
  const title = job.title || job.original_name;

  const dlCell = document.createElement("td");
  dlCell.className = "dl";
  DOWNLOADS.forEach(({ kind, label, title: tip }) => {
    const a = document.createElement("a");
    a.className = "btn-dl";
    a.textContent = label;
    a.title = tip;
    a.href = `/api/jobs/${job.id}/download/${kind}`;
    if (!job.has[kind]) {
      a.classList.add("disabled");
      a.removeAttribute("href");
      a.title = `${tip} — noch nicht verfügbar`;
    }
    dlCell.appendChild(a);
  });

  const ownerLine = currentUser?.is_admin && job.owner_username
    ? `<br><small class="muted">von ${escapeHtml(job.owner_username)}</small>`
    : "";

  // Profile-Tag nur sichtbar wenn ≥2 Profile in der Auswahl ODER es ein anderes als "meeting" ist.
  const showProfileTag = availableProfiles.length > 1 || (job.profile && job.profile !== "meeting");
  const profileTag = showProfileTag
    ? `<span class="tag-profile" title="Verarbeitungs-Profil">${escapeHtml(profileLabelOf(job.profile || "meeting"))}</span>`
    : "";

  const statusCell = `
    <span class="status-pill status-${job.status}">${escapeHtml(job.status)}</span>
    ${job.error ? `<div class="status-error" title="${escapeHtml(job.error)}">${escapeHtml(job.error)}</div>` : ""}
  `;

  tr.innerHTML = `
    <td class="col-id">#${job.id}</td>
    <td class="col-title">${escapeHtml(title)} ${profileTag}<br><small class="muted">${escapeHtml(job.original_name)}</small>${ownerLine}</td>
    <td class="col-status">${statusCell}</td>
    <td class="col-progress"><div class="bar"><div class="bar-fill" style="width:${job.progress}%"></div></div><small class="muted">${job.progress}%</small></td>
    <td class="col-updated"><small class="muted">${fmtDate(job.updated_at)}</small></td>
  `;
  tr.appendChild(dlCell);
  return tr;
}

async function loadJobs() {
  if (!currentUser) return;
  try {
    const r = await api("/api/jobs");
    if (r.status === 401) { showAuth("login"); return; }
    const jobs = await r.json();
    jobsBody.innerHTML = "";
    if (!jobs.length) {
      jobsBody.innerHTML = '<tr><td colspan="6" class="muted">Noch keine Jobs.</td></tr>';
      return;
    }
    jobs.forEach((j) => jobsBody.appendChild(row(j)));
  } catch (e) {
    console.error(e);
  }
}

form.addEventListener("submit", (ev) => {
  ev.preventDefault();
  // Quelle: Aufnahme bevorzugt, sonst File-Input
  const file = recordedFile || (audioInput.files.length ? audioInput.files[0] : null);
  if (!file) {
    uploadMsg.textContent = "Bitte Datei wählen oder Aufnahme erstellen.";
    uploadMsg.className = "msg err";
    return;
  }
  const fd = new FormData();
  fd.append("audio", file, file.name);
  fd.append("title", titleInput.value);
  // Profile mitgeben — leer = Server nimmt user.default_profile
  fd.append("profile", profileSelect.value || "");

  submitBtn.disabled = true;
  uploadProgress.classList.remove("hidden");
  uploadBar.style.width = "0%";
  uploadMsg.textContent = "";
  uploadMsg.className = "msg";

  const xhr = new XMLHttpRequest();
  xhr.open("POST", "/api/jobs");
  xhr.withCredentials = true;
  xhr.upload.onprogress = (e) => {
    if (e.lengthComputable) {
      const p = Math.round((e.loaded / e.total) * 100);
      uploadBar.style.width = p + "%";
    }
  };
  xhr.onload = () => {
    submitBtn.disabled = false;
    uploadProgress.classList.add("hidden");
    if (xhr.status === 401) { showAuth("login"); return; }
    if (xhr.status >= 200 && xhr.status < 300) {
      const j = JSON.parse(xhr.responseText);
      uploadMsg.textContent = `Job #${j.id} erstellt. Verarbeitung läuft …`;
      uploadMsg.className = "msg ok";
      form.reset();
      discardRecording();
      loadJobs();
    } else {
      let err = "Upload fehlgeschlagen";
      try { err = JSON.parse(xhr.responseText).detail || err; } catch {}
      uploadMsg.textContent = err;
      uploadMsg.className = "msg err";
    }
  };
  xhr.onerror = () => {
    submitBtn.disabled = false;
    uploadProgress.classList.add("hidden");
    uploadMsg.textContent = "Netzwerkfehler beim Upload";
    uploadMsg.className = "msg err";
  };
  xhr.send(fd);
});

// ─── Admin: User-Verwaltung ────────────────────────────────────────────────
async function loadUsers() {
  if (!currentUser?.is_admin) return;
  try {
    const r = await api("/api/admin/users");
    if (!r.ok) return;
    const users = await r.json();
    usersBody.innerHTML = "";
    users.forEach((u) => {
      const tr = document.createElement("tr");
      const isMe = u.id === currentUser.id;
      tr.innerHTML = `
        <td>#${u.id}</td>
        <td><strong>${escapeHtml(u.username)}</strong>${isMe ? ' <span class="muted">(du)</span>' : ""}</td>
        <td>${u.is_admin ? '<span class="badge admin-badge">Admin</span>' : '<span class="muted">User</span>'}</td>
        <td><small class="muted">${fmtDate(u.created_at)}</small></td>
        <td class="user-actions">
          <button type="button" class="btn-link reset-pw" data-id="${u.id}" data-name="${escapeHtml(u.username)}">Passwort zurücksetzen</button>
          ${isMe ? "" : `<button type="button" class="btn-link btn-danger del-user" data-id="${u.id}" data-name="${escapeHtml(u.username)}">Löschen</button>`}
        </td>
      `;
      usersBody.appendChild(tr);
    });
  } catch (e) {
    console.error(e);
  }
}

userForm.addEventListener("submit", async (ev) => {
  ev.preventDefault();
  userMsg.textContent = "";
  userMsg.className = "msg";
  const body = JSON.stringify({
    username: newUsername.value.trim(),
    password: newPassword.value,
    is_admin: newIsAdmin.checked,
  });
  const r = await api("/api/admin/users", { method: "POST", body });
  const data = await r.json();
  if (!r.ok) {
    userMsg.textContent = data.detail || "Fehler beim Anlegen";
    userMsg.className = "msg err";
    return;
  }
  userMsg.textContent = `Benutzer '${data.username}' angelegt.`;
  userMsg.className = "msg ok";
  userForm.reset();
  loadUsers();
});

usersBody.addEventListener("click", async (ev) => {
  const t = ev.target;
  if (t.matches(".del-user")) {
    if (!confirm(`Benutzer '${t.dataset.name}' wirklich löschen?\nDie Jobs des Benutzers bleiben erhalten (gehören dann keinem mehr).`)) return;
    const r = await api(`/api/admin/users/${t.dataset.id}`, { method: "DELETE" });
    if (!r.ok) {
      const d = await r.json().catch(() => ({}));
      alert(d.detail || "Löschen fehlgeschlagen");
    }
    loadUsers();
  } else if (t.matches(".reset-pw")) {
    const pw = prompt(`Neues Passwort für '${t.dataset.name}' (min. 8 Zeichen):`);
    if (!pw) return;
    if (pw.length < 8) { alert("Passwort muss min. 8 Zeichen haben"); return; }
    const r = await api(`/api/admin/users/${t.dataset.id}/password`, {
      method: "POST", body: JSON.stringify({ password: pw }),
    });
    if (!r.ok) {
      const d = await r.json().catch(() => ({}));
      alert(d.detail || "Zurücksetzen fehlgeschlagen");
    } else {
      alert("Passwort gesetzt.");
    }
  }
});

// ─── Audio-Aufnahme (MediaRecorder) ────────────────────────────────────────
let mediaRecorder = null;
let recordedChunks = [];
let recordedFile = null;       // File-Objekt nach Stop
let recStream = null;          // MediaStream zum sauberen Schließen
let recStartedAt = 0;
let recPausedAt = 0;           // wenn paused: Zeitpunkt des Pausierens
let recElapsedBeforePause = 0; // aufaddierte Aufnahme-Sekunden vor letztem Resume
let timerInterval = null;
let wakeLock = null;

function pickMimeType() {
  const candidates = [
    "audio/webm;codecs=opus",
    "audio/webm",
    "audio/mp4",       // Safari iOS
    "audio/mpeg",
    "",                // Browser-Default
  ];
  for (const m of candidates) {
    if (m === "" || (window.MediaRecorder && MediaRecorder.isTypeSupported(m))) return m;
  }
  return "";
}

function extFromMime(mime) {
  if (!mime) return "webm";
  if (mime.includes("webm")) return "webm";
  if (mime.includes("mp4"))  return "m4a";
  if (mime.includes("mpeg")) return "mp3";
  if (mime.includes("ogg"))  return "ogg";
  return "webm";
}

function fmtTimer(s) {
  const mm = String(Math.floor(s / 60)).padStart(2, "0");
  const ss = String(Math.floor(s % 60)).padStart(2, "0");
  return `${mm}:${ss}`;
}

function tickTimer() {
  if (!mediaRecorder) return;
  let elapsed = recElapsedBeforePause;
  if (mediaRecorder.state === "recording") elapsed += (Date.now() - recStartedAt) / 1000;
  recordTimer.textContent = fmtTimer(elapsed);
}

async function acquireWakeLock() {
  try {
    if ("wakeLock" in navigator) {
      wakeLock = await navigator.wakeLock.request("screen");
    }
  } catch { /* nicht kritisch */ }
}
async function releaseWakeLock() {
  try { if (wakeLock) await wakeLock.release(); } catch {}
  wakeLock = null;
}

async function startRecording() {
  if (!navigator.mediaDevices?.getUserMedia) {
    alert("Dein Browser unterstützt kein Mikrofon — oder die Seite läuft nicht über HTTPS.");
    return;
  }
  try {
    recStream = await navigator.mediaDevices.getUserMedia({
      audio: { echoCancellation: true, noiseSuppression: true, autoGainControl: true },
    });
  } catch (e) {
    alert("Mikrofon-Zugriff verweigert oder fehlgeschlagen: " + e.message);
    return;
  }

  const mime = pickMimeType();
  recordedChunks = [];
  try {
    mediaRecorder = mime ? new MediaRecorder(recStream, { mimeType: mime }) : new MediaRecorder(recStream);
  } catch (e) {
    alert("MediaRecorder konnte nicht starten: " + e.message);
    cleanupStream();
    return;
  }

  mediaRecorder.ondataavailable = (e) => { if (e.data && e.data.size > 0) recordedChunks.push(e.data); };
  mediaRecorder.onstop = () => {
    const type = mediaRecorder.mimeType || mime || "audio/webm";
    const ext = extFromMime(type);
    const blob = new Blob(recordedChunks, { type });
    const ts = new Date().toISOString().replace(/[:.]/g, "-").slice(0, 19);
    recordedFile = new File([blob], `aufnahme-${ts}.${ext}`, { type });
    onRecordingFinalized();
  };

  mediaRecorder.start(1000);  // alle 1s ein dataavailable-Event
  recStartedAt = Date.now();
  recPausedAt = 0;
  recElapsedBeforePause = 0;
  recordTimer.textContent = "00:00";
  recordStatus.textContent = "Aufnahme läuft";
  recPauseBtn.textContent = "Pause";
  recordPane.classList.remove("hidden");
  recordResult.classList.add("hidden");
  recordToggle.classList.add("hidden");
  audioInput.value = "";  // konkurrierende Datei-Auswahl löschen
  timerInterval = setInterval(tickTimer, 250);
  acquireWakeLock();
}

function pauseRecording() {
  if (!mediaRecorder) return;
  if (mediaRecorder.state === "recording") {
    mediaRecorder.pause();
    recElapsedBeforePause += (Date.now() - recStartedAt) / 1000;
    recPausedAt = Date.now();
    recordStatus.textContent = "Pausiert";
    recPauseBtn.textContent = "Fortsetzen";
  } else if (mediaRecorder.state === "paused") {
    mediaRecorder.resume();
    recStartedAt = Date.now();
    recordStatus.textContent = "Aufnahme läuft";
    recPauseBtn.textContent = "Pause";
  }
}

function stopRecording() {
  if (!mediaRecorder) return;
  if (mediaRecorder.state !== "inactive") mediaRecorder.stop();
  if (timerInterval) { clearInterval(timerInterval); timerInterval = null; }
  cleanupStream();
  releaseWakeLock();
}

function cleanupStream() {
  if (recStream) {
    recStream.getTracks().forEach((t) => t.stop());
    recStream = null;
  }
}

function onRecordingFinalized() {
  recordPane.classList.add("hidden");
  recordResult.classList.remove("hidden");
  recordToggle.classList.remove("hidden");
  recordToggleLabel.textContent = "Neue Aufnahme starten";
  const sizeKB = Math.round(recordedFile.size / 1024);
  recordFilename.textContent = `${recordedFile.name} (${sizeKB} KB)`;
}

function discardRecording() {
  recordedFile = null;
  recordedChunks = [];
  recordResult.classList.add("hidden");
  recordToggleLabel.textContent = "Aufnahme starten";
  recordFilename.textContent = "";
}

recordToggle.addEventListener("click", startRecording);
recPauseBtn.addEventListener("click", pauseRecording);
recStopBtn.addEventListener("click", stopRecording);
recordDiscardBtn.addEventListener("click", discardRecording);

// ─── Init ──────────────────────────────────────────────────────────────────
bootstrap();
checkMac();
setInterval(() => { if (currentUser) loadJobs(); }, 3000);
setInterval(checkMac, 15000);