import express from "express";
import cors from "cors";
import multer from "multer";
import WebTorrent from "webtorrent";
import fs from "fs";
import path from "path";
import mime from "mime-types";
import { WebSocketServer } from "ws";
import { fileURLToPath } from "url";
import { exec } from "child_process";
import crypto from "crypto"; // 🔒 basit token üretimi için

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const app = express();
const upload = multer({ dest: path.join(__dirname, "uploads") });
const client = new WebTorrent();
const torrents = new Map();
let wss;
const PORT = process.env.PORT || 3001;

// --- İndirilen dosyalar için klasör oluştur ---
const DOWNLOAD_DIR = path.join(__dirname, "downloads");
if (!fs.existsSync(DOWNLOAD_DIR))
  fs.mkdirSync(DOWNLOAD_DIR, { recursive: true });

// --- Thumbnail cache klasörü ---
const CACHE_DIR = path.join(__dirname, "cache");
const THUMBNAIL_DIR = path.join(CACHE_DIR, "thumbnails");
const VIDEO_THUMB_ROOT = path.join(THUMBNAIL_DIR, "videos");
const IMAGE_THUMB_ROOT = path.join(THUMBNAIL_DIR, "images");
const MOVIE_DATA_ROOT = path.join(CACHE_DIR, "movie_data");

for (const dir of [
  THUMBNAIL_DIR,
  VIDEO_THUMB_ROOT,
  IMAGE_THUMB_ROOT,
  MOVIE_DATA_ROOT
]) {
  if (!fs.existsSync(dir)) fs.mkdirSync(dir, { recursive: true });
}

const VIDEO_THUMBNAIL_TIME = process.env.VIDEO_THUMBNAIL_TIME || "00:00:05";
const VIDEO_EXTS = [".mp4", ".webm", ".mkv", ".mov", ".m4v"];
const generatingThumbnails = new Set();
const INFO_FILENAME = "info.json";
const TMDB_API_KEY = process.env.TMDB_API_KEY;
const TMDB_BASE_URL = "https://api.themoviedb.org/3";
const TMDB_IMG_BASE =
  process.env.TMDB_IMAGE_BASE || "https://image.tmdb.org/t/p/original";
const FFPROBE_PATH = process.env.FFPROBE_PATH || "ffprobe";
const FFPROBE_MAX_BUFFER =
  Number(process.env.FFPROBE_MAX_BUFFER) > 0
    ? Number(process.env.FFPROBE_MAX_BUFFER)
    : 10 * 1024 * 1024;

app.use(cors());
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
app.use("/downloads", express.static(DOWNLOAD_DIR));

// --- En uygun video dosyasını seç ---
function pickBestVideoFile(torrent) {
  const videos = torrent.files
    .map((f, i) => ({ i, f }))
    .filter(({ f }) => VIDEO_EXTS.includes(path.extname(f.name).toLowerCase()));
  if (!videos.length) return 0;
  videos.sort((a, b) => b.f.length - a.f.length);
  return videos[0].i;
}

function ensureDirForFile(filePath) {
  const dir = path.dirname(filePath);
  if (!fs.existsSync(dir)) fs.mkdirSync(dir, { recursive: true });
}

function infoFilePath(savePath) {
  return path.join(savePath, INFO_FILENAME);
}

function readInfoFile(savePath) {
  const target = infoFilePath(savePath);
  if (!fs.existsSync(target)) return null;
  try {
    return JSON.parse(fs.readFileSync(target, "utf-8"));
  } catch (err) {
    console.warn(`⚠️ info.json okunamadı (${target}): ${err.message}`);
    return null;
  }
}

function upsertInfoFile(savePath, partial) {
  const target = infoFilePath(savePath);
  try {
    ensureDirForFile(target);
    let current = {};
    if (fs.existsSync(target)) {
      try {
        current = JSON.parse(fs.readFileSync(target, "utf-8")) || {};
      } catch (err) {
        console.warn(`⚠️ info.json parse edilemedi (${target}): ${err.message}`);
      }
    }
    const timestamp = Date.now();
    const next = {
      ...current,
      ...partial,
      updatedAt: timestamp
    };
    if (partial && Object.prototype.hasOwnProperty.call(partial, "files")) {
      if (partial.files && typeof partial.files === "object") {
        next.files = partial.files;
      } else {
        delete next.files;
      }
    } else if (current.files && next.files === undefined) {
      next.files = current.files;
    }
    if (!next.createdAt) {
      next.createdAt =
        current.createdAt ?? partial?.createdAt ?? timestamp;
    }
    if (!next.added && partial?.added) {
      next.added = partial.added;
    }
    if (!next.folder) {
      next.folder = path.basename(savePath);
    }
    fs.writeFileSync(target, JSON.stringify(next, null, 2), "utf-8");
    return next;
  } catch (err) {
    console.warn(`⚠️ info.json yazılamadı (${target}): ${err.message}`);
    return null;
  }
}

function readInfoForRoot(rootFolder) {
  const safe = sanitizeRelative(rootFolder);
  if (!safe) return null;
  const target = path.join(DOWNLOAD_DIR, safe, INFO_FILENAME);
  if (!fs.existsSync(target)) return null;
  try {
    return JSON.parse(fs.readFileSync(target, "utf-8"));
  } catch (err) {
    console.warn(`⚠️ info.json okunamadı (${target}): ${err.message}`);
    return null;
  }
}

function sanitizeRelative(relPath) {
  return relPath.replace(/^[\\/]+/, "");
}

function relPathToSegments(relPath) {
  return sanitizeRelative(relPath).split(/[\\/]/).filter(Boolean);
}

function rootFromRelPath(relPath) {
  const segments = relPathToSegments(relPath);
  return segments[0] || null;
}

function getVideoThumbnailPaths(relPath) {
  const parsed = path.parse(relPath);
  const relThumb = path.join("videos", parsed.dir, `${parsed.name}.jpg`);
  const absThumb = path.join(THUMBNAIL_DIR, relThumb);
  return { relThumb, absThumb };
}

function getImageThumbnailPaths(relPath) {
  const parsed = path.parse(relPath);
  const relThumb = path.join(
    "images",
    parsed.dir,
    `${parsed.name}${parsed.ext || ".jpg"}`
  );
  const absThumb = path.join(THUMBNAIL_DIR, relThumb);
  return { relThumb, absThumb };
}

function thumbnailUrl(relThumb) {
  const safe = relThumb
    .split(path.sep)
    .filter(Boolean)
    .map(encodeURIComponent)
    .join("/");
  return `/thumbnails/${safe}`;
}

function markGenerating(absThumb, add) {
  if (add) generatingThumbnails.add(absThumb);
  else generatingThumbnails.delete(absThumb);
}

function toFiniteNumber(value) {
  const num = Number(value);
  return Number.isFinite(num) ? num : null;
}

function parseFrameRate(value) {
  if (!value) return null;
  if (typeof value === "number") return Number.isFinite(value) ? value : null;
  const parts = String(value).split("/");
  if (parts.length === 2) {
    const numerator = Number(parts[0]);
    const denominator = Number(parts[1]);
    if (
      Number.isFinite(numerator) &&
      Number.isFinite(denominator) &&
      denominator !== 0
    ) {
      return Number((numerator / denominator).toFixed(3));
    }
  }
  const num = Number(value);
  return Number.isFinite(num) ? num : null;
}

async function extractMediaInfo(filePath) {
  if (!filePath || !fs.existsSync(filePath)) return null;

  return new Promise((resolve) => {
    exec(
      `${FFPROBE_PATH} -v quiet -print_format json -show_format -show_streams "${filePath}"`,
      { maxBuffer: FFPROBE_MAX_BUFFER },
      (err, stdout) => {
        if (err) {
          console.warn(
            `⚠️ ffprobe çalıştırılamadı (${filePath}): ${err.message}`
          );
          return resolve(null);
        }
        try {
          const parsed = JSON.parse(stdout);
          const streams = Array.isArray(parsed?.streams) ? parsed.streams : [];
          const format = parsed?.format || {};
          const videoStream =
            streams.find((s) => s.codec_type === "video") || null;
          const audioStream =
            streams.find((s) => s.codec_type === "audio") || null;

          const mediaInfo = {
            format: {
              duration: toFiniteNumber(format.duration),
              size: toFiniteNumber(format.size),
              bitrate: toFiniteNumber(format.bit_rate)
            },
            video: videoStream
              ? {
                  codec: videoStream.codec_name || null,
                  profile: videoStream.profile || null,
                  width: toFiniteNumber(videoStream.width),
                  height: toFiniteNumber(videoStream.height),
                  resolution: videoStream.height
                    ? `${videoStream.height}p`
                    : videoStream.width
                    ? `${videoStream.width}px`
                    : null,
                  bitrate: toFiniteNumber(videoStream.bit_rate),
                  frameRate: parseFrameRate(
                    videoStream.avg_frame_rate || videoStream.r_frame_rate
                  ),
                  pixelFormat: videoStream.pix_fmt || null
                }
              : null,
            audio: audioStream
              ? {
                  codec: audioStream.codec_name || null,
                  channels: toFiniteNumber(audioStream.channels),
                  channelLayout: audioStream.channel_layout || null,
                  bitrate: toFiniteNumber(audioStream.bit_rate),
                  sampleRate: toFiniteNumber(audioStream.sample_rate)
                }
              : null
          };

          resolve(mediaInfo);
        } catch (parseErr) {
          console.warn(
            `⚠️ ffprobe çıktısı parse edilemedi (${filePath}): ${parseErr.message}`
          );
          resolve(null);
        }
      }
    );
  });
}

function queueVideoThumbnail(fullPath, relPath) {
  const { relThumb, absThumb } = getVideoThumbnailPaths(relPath);
  if (fs.existsSync(absThumb) || generatingThumbnails.has(absThumb)) return;

  ensureDirForFile(absThumb);
  markGenerating(absThumb, true);

  const cmd = `ffmpeg -y -ss ${VIDEO_THUMBNAIL_TIME} -i "${fullPath}" -frames:v 1 -vf "scale=320:-1" -q:v 2 "${absThumb}"`;
  exec(cmd, (err) => {
    markGenerating(absThumb, false);
    if (err) {
      console.warn(`⚠️ Video thumbnail oluşturulamadı (${fullPath}): ${err.message}`);
      return;
    }
    console.log(`🎞️ Video thumbnail oluşturuldu: ${absThumb}`);
    const root = rootFromRelPath(relPath);
    if (root) broadcastFileUpdate(root);
  });
}

function queueImageThumbnail(fullPath, relPath) {
  const { relThumb, absThumb } = getImageThumbnailPaths(relPath);
  if (fs.existsSync(absThumb) || generatingThumbnails.has(absThumb)) return;

  ensureDirForFile(absThumb);
  markGenerating(absThumb, true);

  const outputExt = path.extname(absThumb).toLowerCase();
  const needsQuality = outputExt === ".jpg" || outputExt === ".jpeg";
  const qualityArgs = needsQuality ? ' -q:v 5' : "";

  const cmd = `ffmpeg -y -i "${fullPath}" -vf "scale=320:-1"${qualityArgs} "${absThumb}"`;
  exec(cmd, (err) => {
    markGenerating(absThumb, false);
    if (err) {
      console.warn(`⚠️ Resim thumbnail oluşturulamadı (${fullPath}): ${err.message}`);
      return;
    }
    console.log(`🖼️ Resim thumbnail oluşturuldu: ${absThumb}`);
    const root = rootFromRelPath(relPath);
    if (root) broadcastFileUpdate(root);
  });
}

function removeThumbnailsForPath(relPath) {
  const normalized = sanitizeRelative(relPath);
  if (!normalized) return;

  const parsed = path.parse(normalized);
  const candidates = [
    path.join(VIDEO_THUMB_ROOT, parsed.dir, `${parsed.name}.jpg`),
    path.join(IMAGE_THUMB_ROOT, parsed.dir, `${parsed.name}${parsed.ext}`)
  ];

  for (const candidate of candidates) {
    try {
      if (fs.existsSync(candidate)) fs.rmSync(candidate, { recursive: true, force: true });
    } catch (err) {
      console.warn(`⚠️ Thumbnail silinemedi (${candidate}): ${err.message}`);
    }
  }

  const potentialDirs = [
    path.join(VIDEO_THUMB_ROOT, parsed.dir),
    path.join(IMAGE_THUMB_ROOT, parsed.dir)
  ];

  for (const dirPath of potentialDirs) {
    cleanupEmptyDirs(dirPath);
  }
}

function cleanupEmptyDirs(startDir) {
  let dir = startDir;
  while (
    dir &&
    dir.startsWith(THUMBNAIL_DIR) &&
    fs.existsSync(dir)
  ) {
    try {
      const stat = fs.lstatSync(dir);
      if (!stat.isDirectory()) break;
      const entries = fs.readdirSync(dir);
      if (entries.length > 0) break;
      fs.rmdirSync(dir);
    } catch (err) {
      console.warn(`⚠️ Thumbnail klasörü temizlenemedi (${dir}): ${err.message}`);
      break;
    }
    const parent = path.dirname(dir);
    if (
      !parent ||
      parent === dir ||
      parent.length < THUMBNAIL_DIR.length ||
      parent === THUMBNAIL_DIR
    ) {
      break;
    }
    dir = parent;
  }
}

function resolveThumbnailAbsolute(relThumbPath) {
  const normalized = sanitizeRelative(relThumbPath);
  const resolved = path.resolve(THUMBNAIL_DIR, normalized);
  if (
    resolved !== THUMBNAIL_DIR &&
    !resolved.startsWith(THUMBNAIL_DIR + path.sep)
  ) {
    return null;
  }
  return resolved;
}

function resolveMovieDataAbsolute(relPath) {
  const normalized = sanitizeRelative(relPath);
  const resolved = path.resolve(MOVIE_DATA_ROOT, normalized);
  if (
    resolved !== MOVIE_DATA_ROOT &&
    !resolved.startsWith(MOVIE_DATA_ROOT + path.sep)
  ) {
    return null;
  }
  return resolved;
}

function removeAllThumbnailsForRoot(rootFolder) {
  const safe = sanitizeRelative(rootFolder);
  if (!safe) return;

  const targets = [
    path.join(VIDEO_THUMB_ROOT, safe),
    path.join(IMAGE_THUMB_ROOT, safe)
  ];

  for (const target of targets) {
    try {
      if (fs.existsSync(target)) {
        fs.rmSync(target, { recursive: true, force: true });
        cleanupEmptyDirs(path.dirname(target));
      }
    } catch (err) {
      console.warn(`⚠️ Thumbnail klasörü silinemedi (${target}): ${err.message}`);
    }
  }
}

function movieDataDir(rootFolder) {
  return path.join(MOVIE_DATA_ROOT, sanitizeRelative(rootFolder));
}

function movieDataPaths(rootFolder) {
  const dir = movieDataDir(rootFolder);
  return {
    dir,
    metadata: path.join(dir, "metadata.json"),
    poster: path.join(dir, "poster.jpg"),
    backdrop: path.join(dir, "backdrop.jpg")
  };
}

function isTmdbMetadata(metadata) {
  if (!metadata) return false;
  if (typeof metadata.id === "number") return true;
  if (metadata._dupe?.source === "tmdb") return true;
  return false;
}

function parseTitleAndYear(rawName) {
  if (!rawName) return { title: null, year: null };
  const withoutExt = rawName.replace(/\.[^/.]+$/, "");
  const cleaned = withoutExt.replace(/[\[\]\(\)\-]/g, " ").replace(/[._]/g, " ");
  const tokens = cleaned
    .split(/\s+/)
    .map((t) => t.trim())
    .filter(Boolean);

  if (!tokens.length) {
    return { title: withoutExt.trim(), year: null };
  }

  const ignoredExact = new Set(
    [
      "hdrip",
      "hdr",
      "webrip",
      "webdl",
      "web",
      "dl",
      "bluray",
      "bdrip",
      "dvdrip",
      "remux",
      "multi",
      "audio",
      "aac",
      "ddp",
      "dts",
      "xvid",
      "x264",
      "x265",
      "x266",
      "h264",
      "h265",
      "hevc",
      "hdr10",
      "hdr10plus",
      "amzn",
      "nf",
      "netflix",
      "disney",
      "imax",
      "atmos",
      "dubbed",
      "dublado",
      "ita",
      "eng",
      "turkce",
      "multi-audio",
      "eazy",
      "tbmovies",
      "tbm",
      "bone"
    ].map((t) => t.toLowerCase())
  );

  const yearIndex = tokens.findIndex((token) => /^(19|20)\d{2}$/.test(token));
  if (yearIndex > 0) {
    const yearToken = tokens[yearIndex];
    const candidateTokens = tokens.slice(0, yearIndex);
    const filteredTitleTokens = candidateTokens.filter((token) => {
      const lower = token.toLowerCase();
      if (ignoredExact.has(lower)) return false;
      if (/^\d{3,4}p$/.test(lower)) return false;
      if (/^(ac3|aac\d*|ddp\d*|dts|dubbed|dual|multi|hc)$/.test(lower))
        return false;
      if (/^(x|h)?26[45]$/.test(lower)) return false;
      if (lower.includes("hdrip") || lower.includes("web-dl")) return false;
      if (lower.includes("multi-audio")) return false;
      return true;
    });

    const titleTokens = filteredTitleTokens.length
      ? filteredTitleTokens
      : candidateTokens;
    const title = titleTokens.join(" ").replace(/\s+/g, " ").trim();

    return {
      title: title || withoutExt.trim(),
      year: Number(yearToken)
    };
  }

  let year = null;
  const filtered = [];
  for (let i = 0; i < tokens.length; i++) {
    const token = tokens[i];
    const lower = token.toLowerCase();
    if (!year && /^(19|20)\d{2}$/.test(lower)) {
      year = Number(lower);
      continue;
    }
    if (/^\d{3,4}p$/.test(lower)) continue;
    if (lower === "web" && tokens[i + 1]?.toLowerCase() === "dl") {
      i += 1;
      continue;
    }
    if (/^(ac3|aac\d*|ddp\d*|dts|dubbed|dual|multi|hc)$/.test(lower)) continue;
    if (/^(x|h)?26[45]$/.test(lower)) continue;
    if (ignoredExact.has(lower)) continue;
    if (lower.includes("hdrip") || lower.includes("web-dl")) continue;
    if (lower.includes("multi-audio")) continue;
    filtered.push(token);
  }

  const title = filtered.join(" ").replace(/\s+/g, " ").trim();
  return { title: title || withoutExt.trim(), year };
}

async function tmdbFetch(endpoint, params = {}) {
  if (!TMDB_API_KEY) return null;
  const url = new URL(`${TMDB_BASE_URL}${endpoint}`);
  url.searchParams.set("api_key", TMDB_API_KEY);
  for (const [key, value] of Object.entries(params)) {
    if (value !== undefined && value !== null && value !== "") {
      url.searchParams.set(key, value);
    }
  }

  const resp = await fetch(url);
  if (!resp.ok) {
    console.warn(`⚠️ TMDB isteği başarısız (${url}): ${resp.status}`);
    return null;
  }
  return resp.json();
}

async function fetchMovieMetadata(title, year) {
  if (!TMDB_API_KEY || !title) return null;
  console.log("🎬 TMDB araması yapılıyor:", { title, year });
  const search = await tmdbFetch("/search/movie", {
    query: title,
    year: year || undefined,
    include_adult: false,
    language: "en-US"
  });
  if (!search?.results?.length) {
    console.log("🎬 TMDB sonucu bulunamadı:", { title, year });
    return null;
  }

  const match = search.results[0];
  const details = await tmdbFetch(`/movie/${match.id}`, {
    language: "en-US",
    append_to_response: "release_dates,credits,translations"
  });
  if (!details) return null;

  if (details.translations?.translations?.length) {
    const translations = details.translations.translations;
    const turkish = translations.find(
      (t) => t.iso_639_1 === "tr" && t.data
    );
    if (turkish?.data) {
      const data = turkish.data;
      if (data.overview) details.overview = data.overview;
      if (data.title) details.title = data.title;
      if (data.tagline) details.tagline = data.tagline;
    }
  }

  console.log("🎬 TMDB sonucu bulundu:", {
    title: match.title || match.name,
    year: match.release_date ? match.release_date.slice(0, 4) : null,
    id: match.id
  });
  return {
    ...details,
    poster_path: match.poster_path || details.poster_path,
    backdrop_path: match.backdrop_path || details.backdrop_path,
    matched_title: match.title || match.name || title,
    matched_year: match.release_date
      ? Number(match.release_date.slice(0, 4))
      : year || null
  };
}

async function downloadImage(url, targetPath) {
  if (!url) return false;
  try {
    const resp = await fetch(url);
    if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
    const arrayBuffer = await resp.arrayBuffer();
    ensureDirForFile(targetPath);
    fs.writeFileSync(targetPath, Buffer.from(arrayBuffer));
    return true;
  } catch (err) {
    console.warn(`⚠️ Görsel indirilemedi (${url}): ${err.message}`);
    return false;
  }
}

async function ensureMovieData(
  rootFolder,
  displayName,
  bestVideoPath,
  precomputedMediaInfo = null
) {
  if (!TMDB_API_KEY) return precomputedMediaInfo || null;
  console.log("🎬 ensureMovieData çağrıldı:", { rootFolder, displayName });

  const paths = movieDataPaths(rootFolder);
  const normalizedRoot = sanitizeRelative(rootFolder);
  const normalizedVideoPath = bestVideoPath
    ? bestVideoPath.replace(/\\/g, "/")
    : null;

  let metadata = null;
  if (fs.existsSync(paths.metadata)) {
    try {
      metadata = JSON.parse(fs.readFileSync(paths.metadata, "utf-8"));
      console.log("🎬 Mevcut metadata bulundu:", rootFolder);
    } catch (err) {
      console.warn(
        `⚠️ metadata.json okunamadı (${paths.metadata}): ${err.message}`
      );
    }
  }

  let fetchedMetadata = false;
  const hasTmdbMetadata = isTmdbMetadata(metadata);

  if (!hasTmdbMetadata) {
    const { title, year } = parseTitleAndYear(displayName);
    console.log("🎬 TMDB araması için analiz:", { displayName, title, year });
    if (title) {
      const fetched = await fetchMovieMetadata(title, year);
      if (fetched) {
        metadata = fetched;
        fetchedMetadata = true;
      }
    }
  }

  if (!isTmdbMetadata(metadata)) {
    console.log(
      "🎬 TMDB verisi bulunamadı, movie_data oluşturulmadı:",
      rootFolder
    );
    removeMovieData(rootFolder);
    return precomputedMediaInfo || null;
  }

  ensureDirForFile(paths.metadata);

  let videoPath =
    (normalizedVideoPath && normalizedVideoPath.trim()) ||
    metadata._dupe?.videoPath ||
    guessPrimaryVideo(rootFolder) ||
    null;
  if (videoPath) videoPath = videoPath.replace(/\\/g, "/");

  const videoAbsPath = videoPath
    ? path.join(DOWNLOAD_DIR, normalizedRoot, videoPath)
    : null;

  let mediaInfo = metadata._dupe?.mediaInfo || precomputedMediaInfo || null;
  if (!mediaInfo && videoAbsPath && fs.existsSync(videoAbsPath)) {
    mediaInfo = await extractMediaInfo(videoAbsPath);
    if (mediaInfo) {
      console.log("🎬 Video teknik bilgileri elde edildi:", {
        rootFolder,
        mediaInfo
      });
    }
  }

  const posterUrl = metadata.poster_path
    ? `${TMDB_IMG_BASE}${metadata.poster_path}`
    : null;
  const backdropUrl = metadata.backdrop_path
    ? `${TMDB_IMG_BASE}${metadata.backdrop_path}`
    : null;

  const enriched = {
    ...metadata,
    _dupe: {
      ...(metadata._dupe || {}),
      folder: rootFolder,
      videoPath,
      mediaInfo,
      source: "tmdb",
      fetchedAt: fetchedMetadata
        ? Date.now()
        : metadata._dupe?.fetchedAt || Date.now()
    }
  };

  fs.writeFileSync(paths.metadata, JSON.stringify(enriched, null, 2), "utf-8");

  if (posterUrl && (!fs.existsSync(paths.poster) || fetchedMetadata)) {
    await downloadImage(posterUrl, paths.poster);
  }
  if (backdropUrl && (!fs.existsSync(paths.backdrop) || fetchedMetadata)) {
    await downloadImage(backdropUrl, paths.backdrop);
  }

  console.log(`🎬 TMDB verisi hazır: ${rootFolder}`);
  return mediaInfo;
}

function removeMovieData(rootFolder) {
  const dir = movieDataDir(rootFolder);
  if (fs.existsSync(dir)) {
    try {
      fs.rmSync(dir, { recursive: true, force: true });
      console.log(`🧹 Movie metadata silindi: ${dir}`);
    } catch (err) {
      console.warn(`⚠️ Movie metadata temizlenemedi (${dir}): ${err.message}`);
    }
  }
}

function purgeRootFolder(rootFolder) {
  const safe = sanitizeRelative(rootFolder);
  if (!safe) return false;

  const rootDir = path.join(DOWNLOAD_DIR, safe);
  let removedDir = false;

  if (fs.existsSync(rootDir)) {
    try {
      fs.rmSync(rootDir, { recursive: true, force: true });
      removedDir = true;
      console.log(`🧹 Kök klasör temizlendi: ${rootDir}`);
    } catch (err) {
      console.warn(`⚠️ Kök klasör silinemedi (${rootDir}): ${err.message}`);
    }
  }

  removeAllThumbnailsForRoot(safe);
  removeMovieData(safe);

  const infoPath = path.join(DOWNLOAD_DIR, safe, INFO_FILENAME);
  if (fs.existsSync(infoPath)) {
    try {
      fs.rmSync(infoPath, { force: true });
    } catch (err) {
      console.warn(`⚠️ info.json kaldırılamadı (${infoPath}): ${err.message}`);
    }
  }

  return removedDir;
}

function pruneInfoEntry(rootFolder, relativePath) {
  if (!rootFolder) return;
  const info = readInfoForRoot(rootFolder);
  if (!info) return;

  let changed = false;
  if (relativePath && info.files && info.files[relativePath]) {
    delete info.files[relativePath];
    if (Object.keys(info.files).length === 0) delete info.files;
    changed = true;
  }

  if (relativePath && info.primaryVideoPath === relativePath) {
    delete info.primaryVideoPath;
    delete info.primaryMediaInfo;
    changed = true;
  }

  if (changed) {
    const safe = sanitizeRelative(rootFolder);
    if (!safe) return;
    const target = path.join(DOWNLOAD_DIR, safe, INFO_FILENAME);
    try {
      info.updatedAt = Date.now();
      fs.writeFileSync(target, JSON.stringify(info, null, 2), "utf-8");
    } catch (err) {
      console.warn(`⚠️ info.json güncellenemedi (${target}): ${err.message}`);
    }
  }
}

function broadcastFileUpdate(rootFolder) {
  if (!wss) return;
  const data = JSON.stringify({
    type: "fileUpdate",
    path: rootFolder
  });
  wss.clients.forEach((c) => c.readyState === 1 && c.send(data));
}

function broadcastSnapshot() {
  if (!wss) return;
  const data = JSON.stringify({ type: "progress", torrents: snapshot() });
  wss.clients.forEach((c) => c.readyState === 1 && c.send(data));
}

// --- Snapshot (thumbnail dahil, tracker + tarih eklendi) ---
function snapshot() {
  return Array.from(torrents.values()).map(
    ({ torrent, selectedIndex, savePath, added }) => {
      const rootFolder = path.basename(savePath);
      const bestVideoIndex = pickBestVideoFile(torrent);
      const bestVideo = torrent.files[bestVideoIndex];
      let thumbnail = null;

      if (bestVideo) {
        const relPath = path.join(rootFolder, bestVideo.path);
        const { relThumb, absThumb } = getVideoThumbnailPaths(relPath);
        if (fs.existsSync(absThumb)) thumbnail = thumbnailUrl(relThumb);
        else if (torrent.progress === 1)
          queueVideoThumbnail(path.join(savePath, bestVideo.path), relPath);
      }

      return {
        infoHash: torrent.infoHash,
        name: torrent.name,
        progress: torrent.progress,
        downloaded: torrent.downloaded,
        downloadSpeed: torrent.downloadSpeed,
        uploadSpeed: torrent.uploadSpeed,
        numPeers: torrent.numPeers,
        tracker: torrent.announce?.[0] || null,
        added,
        savePath, // 🆕 BURASI!
        files: torrent.files.map((f, i) => ({
          index: i,
          name: f.name,
          length: f.length
        })),
        selectedIndex,
        thumbnail
      };
    }
  );
}

// --- Basit kimlik doğrulama sistemi ---
const USERNAME = process.env.USERNAME;
const PASSWORD = process.env.PASSWORD;
let activeTokens = new Set();

app.post("/api/login", (req, res) => {
  const { username, password } = req.body;
  if (username === USERNAME && password === PASSWORD) {
    const token = crypto.randomBytes(24).toString("hex");
    activeTokens.add(token);
    return res.json({ token });
  }
  res.status(401).json({ error: "Invalid credentials" });
});

function requireAuth(req, res, next) {
  const token = req.headers.authorization?.split(" ")[1] || req.query.token;
  if (!token || !activeTokens.has(token))
    return res.status(401).json({ error: "Unauthorized" });
  next();
}

// --- Torrent veya magnet ekleme ---
app.post("/api/transfer", requireAuth, upload.single("torrent"), (req, res) => {
  try {
    let source = req.body.magnet;
    if (req.file) source = fs.readFileSync(req.file.path);
    if (!source)
      return res.status(400).json({ error: "magnet veya .torrent gerekli" });

    // Her torrent için ayrı klasör
    const savePath = path.join(DOWNLOAD_DIR, Date.now().toString());
    fs.mkdirSync(savePath, { recursive: true });

    const torrent = client.add(source, { announce: [], path: savePath });

    // 🆕 Torrent eklendiği anda tarih kaydedelim
    const added = Date.now();

    torrents.set(torrent.infoHash, {
      torrent,
      selectedIndex: 0,
      savePath,
      added
    });

    // --- Metadata geldiğinde ---
    torrent.on("ready", () => {
      const selectedIndex = pickBestVideoFile(torrent);
      torrents.set(torrent.infoHash, {
        torrent,
        selectedIndex,
        savePath,
        added
      });
      const rootFolder = path.basename(savePath);
      upsertInfoFile(savePath, {
        infoHash: torrent.infoHash,
        name: torrent.name,
        tracker: torrent.announce?.[0] || null,
        added,
        createdAt: added,
        folder: rootFolder
      });
      broadcastFileUpdate(rootFolder);
      res.json({
        ok: true,
        infoHash: torrent.infoHash,
        name: torrent.name,
        selectedIndex,
        tracker: torrent.announce?.[0] || null,
        added,
        files: torrent.files.map((f, i) => ({
          index: i,
          name: f.name,
          length: f.length
        }))
      });
      broadcastSnapshot();
    });

    // --- İndirme tamamlandığında thumbnail oluştur ---
    torrent.on("done", async () => {
      const entry = torrents.get(torrent.infoHash);
      if (!entry) return;

      console.log(`✅ Torrent tamamlandı: ${torrent.name}`);

      const rootFolder = path.basename(entry.savePath);

      const bestVideoIndex = pickBestVideoFile(torrent);
      const bestVideo =
        torrent.files[bestVideoIndex] || torrent.files[0] || null;
      const displayName = bestVideo?.name || torrent.name || rootFolder;
      const bestVideoPath = bestVideo?.path
        ? bestVideo.path.replace(/\\/g, "/")
        : null;

      const perFileMetadata = {};
      let primaryMediaInfo = null;

      for (const file of torrent.files) {
        const fullPath = path.join(entry.savePath, file.path);
        const relPathWithRoot = path.join(rootFolder, file.path);
        const normalizedRelPath = file.path.replace(/\\/g, "/");
        const mimeType = mime.lookup(fullPath) || "";
        const ext = path.extname(file.name).replace(/^\./, "").toLowerCase();

        if (mimeType.startsWith("video/")) {
          queueVideoThumbnail(fullPath, relPathWithRoot);
        } else if (mimeType.startsWith("image/")) {
          queueImageThumbnail(fullPath, relPathWithRoot);
        }

        let metaInfo = null;
        if (
          mimeType.startsWith("video/") ||
          mimeType.startsWith("audio/") ||
          mimeType.startsWith("image/")
        ) {
          metaInfo = await extractMediaInfo(fullPath);
        }

        if (
          !primaryMediaInfo &&
          bestVideoPath &&
          normalizedRelPath === bestVideoPath &&
          metaInfo
        ) {
          primaryMediaInfo = metaInfo;
        }

        perFileMetadata[normalizedRelPath] = {
          size: file.length,
          extension: ext || null,
          mimeType,
          mediaInfo: metaInfo
        };
      }

      // Eski thumbnail yapısını temizle
      try {
        const legacyThumb = path.join(entry.savePath, "thumbnail.jpg");
        if (fs.existsSync(legacyThumb)) fs.rmSync(legacyThumb, { force: true });
        const legacyDir = path.join(entry.savePath, "thumbnail");
        if (fs.existsSync(legacyDir))
          fs.rmSync(legacyDir, { recursive: true, force: true });
      } catch (err) {
        console.warn("⚠️ Eski thumbnail klasörü temizlenemedi:", err.message);
      }

      const infoUpdate = {
        completedAt: Date.now(),
        totalBytes: torrent.downloaded,
        fileCount: torrent.files.length,
        files: perFileMetadata
      };
      if (bestVideoPath) infoUpdate.primaryVideoPath = bestVideoPath;

      const ensuredMedia = await ensureMovieData(
        rootFolder,
        displayName,
        bestVideoPath,
        primaryMediaInfo
      );
      if (ensuredMedia) infoUpdate.primaryMediaInfo = ensuredMedia;

      upsertInfoFile(entry.savePath, infoUpdate);
      broadcastFileUpdate(rootFolder);

      broadcastSnapshot();
    });
  } catch (err) {
    res.status(500).json({ error: err.message });
  }
});

// --- Thumbnail endpoint ---
app.get("/thumbnails/:path(*)", requireAuth, (req, res) => {
  const relThumb = req.params.path || "";
  const fullPath = resolveThumbnailAbsolute(relThumb);
  if (!fullPath) return res.status(400).send("Geçersiz thumbnail yolu");
  if (!fs.existsSync(fullPath)) return res.status(404).send("Thumbnail yok");
  res.sendFile(fullPath);
});

app.get("/movie-data/:path(*)", requireAuth, (req, res) => {
  const relPath = req.params.path || "";
  const fullPath = resolveMovieDataAbsolute(relPath);
  if (!fullPath) return res.status(400).send("Geçersiz movie data yolu");
  if (!fs.existsSync(fullPath)) return res.status(404).send("Dosya bulunamadı");
  res.sendFile(fullPath);
});

// --- Torrentleri listele ---
app.get("/api/torrents", requireAuth, (req, res) => {
  res.json(snapshot());
});

// --- Seçili dosya değiştir ---
app.post("/api/torrents/:hash/select/:index", requireAuth, (req, res) => {
  const entry = torrents.get(req.params.hash);
  if (!entry) return res.status(404).json({ error: "torrent bulunamadı" });
  entry.selectedIndex = Number(req.params.index) || 0;
  res.json({ ok: true, selectedIndex: entry.selectedIndex });
});

// --- Torrent silme (disk dahil) ---
app.delete("/api/torrents/:hash", requireAuth, (req, res) => {
  const entry = torrents.get(req.params.hash);
  if (!entry) return res.status(404).json({ error: "torrent bulunamadı" });

  const { torrent, savePath } = entry;
  const isComplete = torrent?.done || (torrent?.progress ?? 0) >= 1;
  const rootFolder = savePath ? path.basename(savePath) : null;

  torrent.destroy(() => {
    torrents.delete(req.params.hash);
    if (!isComplete) {
      if (savePath && fs.existsSync(savePath)) {
        try {
          fs.rmSync(savePath, { recursive: true, force: true });
          console.log(`🗑️ ${savePath} klasörü silindi`);
        } catch (err) {
          console.warn(`⚠️ ${savePath} silinemedi:`, err.message);
        }
      }
      if (rootFolder) {
        purgeRootFolder(rootFolder);
        broadcastFileUpdate(rootFolder);
      }
    } else {
      console.log(
        `ℹ️ ${req.params.hash} torrent'i tamamlandığı için yalnızca Transfers listesinden kaldırıldı; dosyalar tutuldu.`
      );
    }
    broadcastSnapshot();
    res.json({
      ok: true,
      filesRemoved: !isComplete
    });
  });
});

// --- GENEL MEDYA SUNUMU (🆕 resimler + videolar) ---
app.get("/media/:path(*)", requireAuth, (req, res) => {
  const relPath = req.params.path;
  const fullPath = path.join(DOWNLOAD_DIR, relPath);
  if (!fs.existsSync(fullPath)) return res.status(404).send("File not found");

  const stat = fs.statSync(fullPath);
  const fileSize = stat.size;
  const type = mime.lookup(fullPath) || "application/octet-stream";
  const isVideo = String(type).startsWith("video/");
  const range = req.headers.range;

  if (isVideo && range) {
    const [startStr, endStr] = range.replace(/bytes=/, "").split("-");
    const start = parseInt(startStr, 10);
    const end = endStr ? parseInt(endStr, 10) : fileSize - 1;
    const chunkSize = end - start + 1;
    const file = fs.createReadStream(fullPath, { start, end });
    const head = {
      "Content-Range": `bytes ${start}-${end}/${fileSize}`,
      "Accept-Ranges": "bytes",
      "Content-Length": chunkSize,
      "Content-Type": type
    };
    res.writeHead(206, head);
    file.pipe(res);
  } else {
    const head = {
      "Content-Length": fileSize,
      "Content-Type": type,
      "Accept-Ranges": isVideo ? "bytes" : "none"
    };
    res.writeHead(200, head);
    fs.createReadStream(fullPath).pipe(res);
  }
});

// --- 🗑️ Tekil dosya veya torrent klasörü silme ---
app.delete("/api/file", requireAuth, (req, res) => {
  const filePath = req.query.path;
  if (!filePath) return res.status(400).json({ error: "path gerekli" });

  const safePath = sanitizeRelative(filePath);
  const fullPath = path.join(DOWNLOAD_DIR, safePath);
  const folderId = (safePath.split(/[\/]/)[0] || "").trim();
  const rootDir = folderId ? path.join(DOWNLOAD_DIR, folderId) : null;

  let stats = null;
  try {
    stats = fs.statSync(fullPath);
  } catch (err) {
    const message = err?.message || String(err);
    console.warn(`⚠️ Silme sırasında stat alınamadı (${fullPath}): ${message}`);
  }

  if (!stats || !fs.existsSync(fullPath)) {
    if (folderId && (!rootDir || !fs.existsSync(rootDir))) {
      purgeRootFolder(folderId);
      broadcastFileUpdate(folderId);
      return res.json({ ok: true, alreadyRemoved: true });
    }
    return res.status(404).json({ error: "Dosya bulunamadı" });
  }

  try {
    fs.rmSync(fullPath, { recursive: true, force: true });
    console.log(`🗑️ Dosya/klasör silindi: ${fullPath}`);
    removeThumbnailsForPath(safePath);

    if (folderId) {
      const relWithinRoot = safePath.split(/[\/]/).slice(1).join("/");
      const rootExists = rootDir && fs.existsSync(rootDir);

      if (!relWithinRoot || !rootExists) {
        purgeRootFolder(folderId);
      } else {
        const remaining = fs.readdirSync(rootDir);
        const meaningful = remaining.filter((name) => {
          if (!name) return false;
          if (name === INFO_FILENAME) return false;
          if (name.startsWith(".")) return false;
          const full = path.join(rootDir, name);
          try {
            const stat = fs.statSync(full);
            if (stat.isDirectory()) {
              const subItems = fs.readdirSync(full);
              return subItems.some((entry) => !entry.startsWith("."));
            }
          } catch (err) {
            return false;
          }
          return true;
        });

        if (meaningful.length === 0 || stats?.isDirectory?.()) {
          purgeRootFolder(folderId);
        } else {
          pruneInfoEntry(folderId, relWithinRoot);
          const infoAfter = readInfoForRoot(folderId);
          const displayName = infoAfter?.name || folderId;
          const primaryVideo = infoAfter?.primaryVideoPath || guessPrimaryVideo(folderId);
          if (primaryVideo) {
            const candidateMedia =
              infoAfter?.files?.[primaryVideo]?.mediaInfo ||
              infoAfter?.primaryMediaInfo ||
              null;
            ensureMovieData(folderId, displayName, primaryVideo, candidateMedia).catch(
              (err) =>
                console.warn(
                  `⚠️ Movie metadata yenilenemedi (${folderId}): ${err?.message || err}`
                )
            );
          }
        }
      }

      broadcastFileUpdate(folderId);
    }

    if (folderId) {
      let matchedInfoHash = null;
      for (const [infoHash, entry] of torrents.entries()) {
        const lastDir = path.basename(entry.savePath);
        if (lastDir === folderId) {
          matchedInfoHash = infoHash;
          break;
        }
      }

      if (matchedInfoHash) {
        const entry = torrents.get(matchedInfoHash);
        entry?.torrent?.destroy(() => {
          torrents.delete(matchedInfoHash);
          console.log(`🧹 Torrent kaydı da temizlendi: ${matchedInfoHash}`);
          broadcastSnapshot();
        });
      } else {
        broadcastSnapshot();
      }
    } else {
      broadcastSnapshot();
    }

    res.json({ ok: true, filesRemoved: true });
  } catch (err) {
    console.error("❌ Dosya silinemedi:", err.message);
    res.status(500).json({ error: err.message });
  }
});

// --- 📁 Dosya gezgini (🆕 type ve url alanları eklendi; resim thumb'ı) ---
app.get("/api/files", requireAuth, (req, res) => {
  // --- 🧩 .ignoreFiles içeriğini oku ---
  let ignoreList = [];
  const ignorePath = path.join(__dirname, ".ignoreFiles");

  if (fs.existsSync(ignorePath)) {
    try {
      const raw = fs.readFileSync(ignorePath, "utf-8");
      ignoreList = raw
        .split("\n")
        .map((l) => l.trim().toLowerCase())
        .filter((l) => l && !l.startsWith("#"));
    } catch (err) {
      console.warn("⚠️ .ignoreFiles okunamadı:", err.message);
    }
  }

  // --- 🔍 Yardımcı fonksiyon: dosya ignoreList’te mi? ---
  const isIgnored = (name) => {
    const lower = name.toLowerCase();
    const ext = path.extname(lower).replace(".", "");
    return ignoreList.some(
      (ignored) =>
        lower === ignored ||
        lower.endsWith(ignored) ||
        lower.endsWith(`.${ignored}`) ||
        ext === ignored.replace(/^\./, "")
    );
  };

  const infoCache = new Map();
  const getInfo = (relPath) => {
    const root = rootFromRelPath(relPath);
    if (!root) return null;
    if (!infoCache.has(root)) {
      infoCache.set(root, readInfoForRoot(root));
    }
    return infoCache.get(root);
  };

  // --- 📁 Klasörleri dolaş ---
  const walk = (dir) => {
    let result = [];
    const list = fs.readdirSync(dir, { withFileTypes: true });

    for (const entry of list) {
      const full = path.join(dir, entry.name);
      const rel = path.relative(DOWNLOAD_DIR, full);

      // 🔥 Ignore kontrolü (hem dosya hem klasör için)
      if (isIgnored(entry.name) || isIgnored(rel)) continue;

      if (entry.isDirectory()) {
        result = result.concat(walk(full));
      } else {
        if (entry.name.toLowerCase() === INFO_FILENAME) continue;

        const size = fs.statSync(full).size;
        const type = mime.lookup(full) || "application/octet-stream";

        const safeRel = sanitizeRelative(rel);
        const urlPath = safeRel
          .split(/[\\/]/)
          .map(encodeURIComponent)
          .join("/");
        const url = `/media/${urlPath}`;

        const isImage = String(type).startsWith("image/");
        const isVideo = String(type).startsWith("video/");

        let thumb = null;

        if (isVideo) {
          const { relThumb, absThumb } = getVideoThumbnailPaths(safeRel);
          if (fs.existsSync(absThumb)) thumb = thumbnailUrl(relThumb);
          else queueVideoThumbnail(full, safeRel);
        }

        if (isImage) {
          const { relThumb, absThumb } = getImageThumbnailPaths(safeRel);
          if (fs.existsSync(absThumb)) thumb = thumbnailUrl(relThumb);
          else queueImageThumbnail(full, safeRel);
        }

        const info = getInfo(safeRel) || {};
        const rootFolder = rootFromRelPath(safeRel);
        const added = info.added ?? info.createdAt ?? null;
        const completedAt = info.completedAt ?? null;
        const tracker = info.tracker ?? null;
        const torrentName = info.name ?? null;
        const infoHash = info.infoHash ?? null;
        const relWithinRoot = safeRel.split(/[\\/]/).slice(1).join("/");
        const fileMeta = relWithinRoot
          ? info.files?.[relWithinRoot] || null
          : null;
        const extensionForFile = fileMeta?.extension || path.extname(entry.name).replace(/^\./, "").toLowerCase() || null;
        const mediaInfoForFile = fileMeta?.mediaInfo || null;

        result.push({
          name: safeRel,
          size,
          type,
          url,
          thumbnail: thumb,
          rootFolder,
          added,
          completedAt,
          tracker,
          torrentName,
          infoHash,
          extension: extensionForFile,
          mediaInfo: mediaInfoForFile,
          primaryVideoPath: info.primaryVideoPath || null,
          primaryMediaInfo: info.primaryMediaInfo || null
        });
      }
    }

    return result;
  };

  try {
    const files = walk(DOWNLOAD_DIR);
    res.json(files);
  } catch (err) {
    console.error("📁 Files API error:", err);
    res.status(500).json({ error: err.message });
  }
});

// --- 🎬 Film listesi ---
app.get("/api/movies", requireAuth, (req, res) => {
  try {
    if (!fs.existsSync(MOVIE_DATA_ROOT)) {
      return res.json([]);
    }

    const entries = fs
      .readdirSync(MOVIE_DATA_ROOT, { withFileTypes: true })
      .filter((d) => d.isDirectory());

    const movies = entries
      .map((dirent) => {
        const folder = dirent.name;
        const paths = movieDataPaths(folder);
        if (!fs.existsSync(paths.metadata)) return null;
        try {
          const metadata = JSON.parse(
            fs.readFileSync(paths.metadata, "utf-8")
          );
          if (!isTmdbMetadata(metadata)) {
            removeMovieData(folder);
            return null;
          }
          const encodedFolder = folder
            .split(path.sep)
            .map(encodeURIComponent)
            .join("/");
          const posterExists = fs.existsSync(paths.poster);
          const backdropExists = fs.existsSync(paths.backdrop);
          const releaseDate = metadata.release_date || metadata.first_air_date;
          const year = releaseDate
            ? Number(releaseDate.slice(0, 4))
            : metadata.matched_year || null;
          const runtimeMinutes =
            metadata.runtime ??
            (Array.isArray(metadata.episode_run_time) &&
            metadata.episode_run_time.length
              ? metadata.episode_run_time[0]
              : null);
          const dupe = metadata._dupe || {};

          return {
            folder,
            id: metadata.id ?? folder,
            title: metadata.title || metadata.matched_title || folder,
            originalTitle: metadata.original_title || null,
            year,
            runtime: runtimeMinutes || null,
            overview: metadata.overview || "",
            voteAverage: metadata.vote_average || null,
            voteCount: metadata.vote_count || null,
            genres: Array.isArray(metadata.genres)
              ? metadata.genres.map((g) => g.name)
              : [],
            poster: posterExists
              ? `/movie-data/${encodedFolder}/poster.jpg`
              : null,
            backdrop: backdropExists
              ? `/movie-data/${encodedFolder}/backdrop.jpg`
              : null,
            videoPath: dupe.videoPath || null,
            mediaInfo: dupe.mediaInfo || null,
            metadata
          };
        } catch (err) {
          console.warn(
            `⚠️ metadata.json okunamadı (${paths.metadata}): ${err.message}`
          );
          return null;
        }
      })
      .filter(Boolean);

    movies.sort((a, b) => {
      const yearA = a.year || 0;
      const yearB = b.year || 0;
      if (yearA !== yearB) return yearB - yearA;
      return a.title.localeCompare(b.title);
    });

    res.json(movies);
  } catch (err) {
    console.error("🎬 Movies API error:", err);
    res.status(500).json({ error: err.message });
  }
});

app.post("/api/movies/refresh", requireAuth, async (req, res) => {
  if (!TMDB_API_KEY) {
    return res.status(400).json({ error: "TMDB API key tanımlı değil." });
  }

  try {
    const folders = fs
      .readdirSync(DOWNLOAD_DIR, { withFileTypes: true })
      .filter((d) => d.isDirectory())
      .map((d) => d.name);

    const processed = [];
    for (const folder of folders) {
      const info = readInfoForRoot(folder);
      const displayName = info?.name || folder;
      const primaryVideo = info?.primaryVideoPath || guessPrimaryVideo(folder);
      const candidateMedia =
        info?.files?.[primaryVideo]?.mediaInfo || info?.primaryMediaInfo || null;
      const ensured = await ensureMovieData(
        folder,
        displayName,
        primaryVideo,
        candidateMedia
      );
      if (primaryVideo || ensured) {
        const update = {};
        if (primaryVideo) update.primaryVideoPath = primaryVideo;
        if (ensured) update.primaryMediaInfo = ensured;
        if (Object.keys(update).length) {
          upsertInfoFile(path.join(DOWNLOAD_DIR, folder), update);
        }
      }
      processed.push(folder);
    }

    res.json({ ok: true, processed });
  } catch (err) {
    console.error("🎬 Movies refresh error:", err);
    res.status(500).json({ error: err.message });
  }
});

// --- Stream endpoint (torrent içinden) ---
app.get("/stream/:hash", requireAuth, (req, res) => {
  const entry = torrents.get(req.params.hash);
  if (!entry) return res.status(404).end();

  const file =
    entry.torrent.files[entry.selectedIndex] || entry.torrent.files[0];
  const total = file.length;
  const type = mime.lookup(file.name) || "video/mp4";
  const range = req.headers.range;

  if (!range) {
    res.writeHead(200, {
      "Content-Length": total,
      "Content-Type": type,
      "Accept-Ranges": "bytes"
    });
    return file.createReadStream().pipe(res);
  }

  const [s, e] = range.replace(/bytes=/, "").split("-");
  const start = parseInt(s, 10);
  const end = e ? parseInt(e, 10) : total - 1;

  res.writeHead(206, {
    "Content-Range": `bytes ${start}-${end}/${total}`,
    "Accept-Ranges": "bytes",
    "Content-Length": end - start + 1,
    "Content-Type": type
  });

  const stream = file.createReadStream({ start, end });
  stream.on("error", (err) => console.warn("Stream error:", err.message));
  res.on("close", () => stream.destroy());
  stream.pipe(res);
});

console.log("📂 Download path:", DOWNLOAD_DIR);


// --- ✅ Client build (frontend) dosyalarını sun ---
const publicDir = path.join(__dirname, "public");
if (fs.existsSync(publicDir)) {
  app.use(express.static(publicDir));
  app.get("*", (req, res, next) => {
    if (req.path.startsWith("/api")) return next();
    res.sendFile(path.join(publicDir, "index.html"));
  });
}

const server = app.listen(PORT, () =>
  console.log(`✅ WebTorrent server ${PORT} portunda çalışıyor`)
);

wss = new WebSocketServer({ server });
wss.on("connection", (ws) => {
  ws.send(JSON.stringify({ type: "progress", torrents: snapshot() }));
});

// --- ⏱️ Her 2 saniyede bir aktif torrent durumu yayınla ---
setInterval(() => {
  if (torrents.size > 0) {
    broadcastSnapshot();
  }
}, 2000);

client.on("error", (err) => {
  if (!String(err).includes("uTP"))
    console.error("WebTorrent error:", err.message);
});