/** 对齐 d2yexeapp electron `youtubeConfigUtils.ts` 的浏览器侧解析（无 OAuth） */

export function parseYoutubeStreamKeySuffix(iniOrKeyLine: string): string {
  for (const line of iniOrKeyLine.split(/\r?\n/)) {
    const t = line.trim();
    if (t.startsWith("#") || !t) continue;
    const m = t.match(/^(?:key|stream_key)\s*=\s*(.+)$/i);
    if (m) {
      const v = m[1].trim().split(/[#;]/)[0].trim();
      if (v && !v.toLowerCase().startsWith("rtmp")) return v.length > 8 ? v.slice(-8) : v;
      if (v.includes("live2/")) {
        const parts = v.split("/");
        const last = parts[parts.length - 1] || "";
        return last.length > 8 ? last.slice(-8) : last;
      }
    }
  }
  const one = iniOrKeyLine.trim();
  if (one && !one.includes("\n") && !one.toLowerCase().startsWith("rtmp"))
    return one.length > 8 ? one.slice(-8) : one;
  return "";
}

export function extractDouyinLiveUrls(urlIni: string): string[] {
  const out: string[] = [];
  for (const line of urlIni.split(/\r?\n/)) {
    const t = line.trim();
    if (!t || t.startsWith("#")) continue;
    if (!/douyin\.com|v\.douyin\.com/i.test(t)) continue;
    const full = t.match(/(https?:\/\/live\.douyin\.com\/[a-zA-Z0-9_-]+)/i);
    if (full) {
      out.push(full[1].replace(/^http:\/\//i, "https://"));
      continue;
    }
    const rel = t.match(/live\.douyin\.com\/([a-zA-Z0-9_-]+)/i);
    if (rel) {
      out.push(`https://live.douyin.com/${rel[1]}`);
      continue;
    }
    const n = t.match(/(\d{8,})/);
    if (n) out.push(`https://live.douyin.com/${n[1]}`);
  }
  return Array.from(new Set(out)).slice(0, 16);
}

/** 从进程日志中解析「当前」抖音房间号（取文本中最后一次出现的 live.douyin.com/xxx） */
export function extractDouyinCurrentRoomFromLog(logText: string): string | null {
  if (!logText) return null;
  let last: string | null = null;
  for (const line of logText.split(/\r?\n/)) {
    const m = line.match(/live\.douyin\.com\/([a-zA-Z0-9_-]+)/i);
    if (m) last = m[1];
    const m2 = line.match(/https?:\/\/[^/\s]*douyin\.com\/(\d{8,})/i);
    if (m2) last = m2[1];
  }
  return last;
}

/** URL_config 文本中提取抖音房间线索（与 d2y electron 一致） */
export function extractDouyinRoomHints(urlIni: string): string[] {
  const out: string[] = [];
  for (const line of urlIni.split(/\r?\n/)) {
    const t = line.trim();
    if (!t || t.startsWith("#")) continue;
    if (!/douyin\.com|v\.douyin\.com/i.test(t)) continue;
    const m = t.match(/live\.douyin\.com\/([a-zA-Z0-9_-]+)/i);
    if (m) {
      out.push(m[1]);
      continue;
    }
    const n = t.match(/(\d{8,})/);
    out.push(n ? n[1] : t.slice(0, 96));
  }
  return Array.from(new Set(out)).slice(0, 12);
}

export type YoutubeIniFields = {
  key: string;
  rtmps: boolean;
  bitrate: string;
  fastAudio: boolean;
};

export function parseYoutubeIniFields(content: string): YoutubeIniFields {
  let key = "";
  let rtmps = true;
  let bitrate = "";
  let fastAudio = false;
  const lines = content.split(/\r?\n/);
  let inYoutube = false;
  for (const line of lines) {
    const t = line.trim();
    if (/^\[youtube\]/i.test(t)) {
      inYoutube = true;
      continue;
    }
    if (/^\[/.test(t)) {
      inYoutube = false;
      continue;
    }
    if (!inYoutube) continue;
    if (!t || t.startsWith("#") || t.startsWith(";")) continue;
    const eq = t.indexOf("=");
    if (eq < 0) continue;
    const k = t.slice(0, eq).trim().toLowerCase();
    const v = t
      .slice(eq + 1)
      .trim()
      .split(/[#;]/)[0]
      .trim();
    if (k === "key" || k === "stream_key") key = v;
    else if (k === "rtmps") rtmps = !/^(0|false|否)/i.test(v);
    else if (k === "bitrate") bitrate = v;
    else if (k === "fast_audio") fastAudio = /^(1|true|yes|是|开|on)/i.test(v);
  }
  return { key, rtmps, bitrate, fastAudio };
}

/** 与 web.py `managed_url_config_relpath` 一致（每进程独立，避免 YouTube / TikTok 共写同一文件） */
export function managedUrlConfigRelPathForPm2(pm2: string): string {
  return `URL_config.${pm2.replace(/[^a-zA-Z0-9_.-]/g, "_")}.ini`;
}

/** 与 web.py `managed_youtube_ini_relpath` 一致 */
export function managedYoutubeIniRelPathForPm2(pm2: string): string {
  return `youtube.${pm2.replace(/[^a-zA-Z0-9_.-]/g, "_")}.ini`;
}

export function buildYoutubeIniFromFields(f: YoutubeIniFields): string {
  const bitrateLine = f.bitrate.trim()
    ? `bitrate = ${f.bitrate.trim()}`
    : "# bitrate = 4000";
  return `[youtube]
# YouTube 推流 key（工作室 → 直播 → 串流密钥）
key = ${f.key.trim()}

# 使用 RTMPS；填 否 则 RTMP
rtmps = ${f.rtmps ? "是" : "否"}

# 视频比特率 kbps（可选）
${bitrateLine}

# 轻量音频链，减轻 CPU：1 / 是
fast_audio = ${f.fastAudio ? "1" : "0"}
`;
}