import { EdgeTTS } from 'node-edge-tts'; // listVoices is no longer needed here
import fs from 'node:fs';
import path from 'node:path';
import { app } from 'electron';
import log from 'electron-log';

// --- START OF HARDCODED VOICE LIST ---
// WARNING: This list is static and may become outdated.
// It's generally recommended to use listVoices() for the most up-to-date list.
const hardcodedVoices = [
  { Name: 'Microsoft Server Speech Text to Speech Voice (af-ZA, AdriNeural)', ShortName: 'af-ZA-AdriNeural', Gender: 'Female', Locale: 'af-ZA' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (am-ET, MekdesNeural)', ShortName: 'am-ET-MekdesNeural', Gender: 'Female', Locale: 'am-ET' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (ar-AE, FatimaNeural)', ShortName: 'ar-AE-FatimaNeural', Gender: 'Female', Locale: 'ar-AE' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (ar-AE, HamdanNeural)', ShortName: 'ar-AE-HamdanNeural', Gender: 'Male', Locale: 'ar-AE' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (ar-BH, AliNeural)', ShortName: 'ar-BH-AliNeural', Gender: 'Male', Locale: 'ar-BH' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (ar-BH, LailaNeural)', ShortName: 'ar-BH-LailaNeural', Gender: 'Female', Locale: 'ar-BH' },
  // ... (Many other Arabic locales/voices) ...
  { Name: 'Microsoft Server Speech Text to Speech Voice (ar-SA, ZariyahNeural)', ShortName: 'ar-SA-ZariyahNeural', Gender: 'Female', Locale: 'ar-SA' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (az-AZ, BabekNeural)', ShortName: 'az-AZ-BabekNeural', Gender: 'Male', Locale: 'az-AZ' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (az-AZ, BanuNeural)', ShortName: 'az-AZ-BanuNeural', Gender: 'Female', Locale: 'az-AZ' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (bg-BG, BorislavNeural)', ShortName: 'bg-BG-BorislavNeural', Gender: 'Male', Locale: 'bg-BG' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (bg-BG, KalinaNeural)', ShortName: 'bg-BG-KalinaNeural', Gender: 'Female', Locale: 'bg-BG' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (bn-BD, NabanitaNeural)', ShortName: 'bn-BD-NabanitaNeural', Gender: 'Female', Locale: 'bn-BD' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (bn-BD, PradeepNeural)', ShortName: 'bn-BD-PradeepNeural', Gender: 'Male', Locale: 'bn-BD' },
  // ... (Catalan, Czech, Welsh, Danish, German, Greek, English variants) ...
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-AU, NatashaNeural)', ShortName: 'en-AU-NatashaNeural', Gender: 'Female', Locale: 'en-AU' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-AU, WilliamNeural)', ShortName: 'en-AU-WilliamNeural', Gender: 'Male', Locale: 'en-AU' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-CA, ClaraNeural)', ShortName: 'en-CA-ClaraNeural', Gender: 'Female', Locale: 'en-CA' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-CA, LiamNeural)', ShortName: 'en-CA-LiamNeural', Gender: 'Male', Locale: 'en-CA' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-GB, LibbyNeural)', ShortName: 'en-GB-LibbyNeural', Gender: 'Female', Locale: 'en-GB' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-GB, MaisieNeural)', ShortName: 'en-GB-MaisieNeural', Gender: 'Female', Locale: 'en-GB' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-GB, RyanNeural)', ShortName: 'en-GB-RyanNeural', Gender: 'Male', Locale: 'en-GB' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-GB, SoniaNeural)', ShortName: 'en-GB-SoniaNeural', Gender: 'Female', Locale: 'en-GB' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-GB, ThomasNeural)', ShortName: 'en-GB-ThomasNeural', Gender: 'Male', Locale: 'en-GB' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-HK, SamNeural)', ShortName: 'en-HK-SamNeural', Gender: 'Male', Locale: 'en-HK' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-HK, YanNeural)', ShortName: 'en-HK-YanNeural', Gender: 'Female', Locale: 'en-HK' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-IE, ConnorNeural)', ShortName: 'en-IE-ConnorNeural', Gender: 'Male', Locale: 'en-IE' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-IE, EmilyNeural)', ShortName: 'en-IE-EmilyNeural', Gender: 'Female', Locale: 'en-IE' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-IN, NeerjaNeural)', ShortName: 'en-IN-NeerjaNeural', Gender: 'Female', Locale: 'en-IN' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-IN, PrabhatNeural)', ShortName: 'en-IN-PrabhatNeural', Gender: 'Male', Locale: 'en-IN' },
  // ... (Many more English variants: KE, NG, NZ, PH, SG, TZ, US, ZA) ...
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-US, AriaNeural)', ShortName: 'en-US-AriaNeural', Gender: 'Female', Locale: 'en-US' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-US, AnaNeural)', ShortName: 'en-US-AnaNeural', Gender: 'Female', Locale: 'en-US' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-US, ChristopherNeural)', ShortName: 'en-US-ChristopherNeural', Gender: 'Male', Locale: 'en-US' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-US, EricNeural)', ShortName: 'en-US-EricNeural', Gender: 'Male', Locale: 'en-US' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-US, GuyNeural)', ShortName: 'en-US-GuyNeural', Gender: 'Male', Locale: 'en-US' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-US, JennyNeural)', ShortName: 'en-US-JennyNeural', Gender: 'Female', Locale: 'en-US' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-US, MichelleNeural)', ShortName: 'en-US-MichelleNeural', Gender: 'Female', Locale: 'en-US' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-US, RogerNeural)', ShortName: 'en-US-RogerNeural', Gender: 'Male', Locale: 'en-US' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (en-US, SteffanNeural)', ShortName: 'en-US-SteffanNeural', Gender: 'Male', Locale: 'en-US' },
  // ... (Spanish variants) ...
  { Name: 'Microsoft Server Speech Text to Speech Voice (es-MX, DaliaNeural)', ShortName: 'es-MX-DaliaNeural', Gender: 'Female', Locale: 'es-MX' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (es-MX, JorgeNeural)', ShortName: 'es-MX-JorgeNeural', Gender: 'Male', Locale: 'es-MX' },
  // ... (Estonian, Basque, Persian, Finnish, Filipino, French, Irish, Galician, Gujarati, Hebrew, Hindi, Croatian, Hungarian, Indonesian, Icelandic, Italian, Japanese) ...
  { Name: 'Microsoft Server Speech Text to Speech Voice (ja-JP, KeitaNeural)', ShortName: 'ja-JP-KeitaNeural', Gender: 'Male', Locale: 'ja-JP' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (ja-JP, NanamiNeural)', ShortName: 'ja-JP-NanamiNeural', Gender: 'Female', Locale: 'ja-JP' },
  // ... (Javanese, Georgian, Kazakh, Khmer, Kannada, Korean) ...
  { Name: 'Microsoft Server Speech Text to Speech Voice (ko-KR, InJoonNeural)', ShortName: 'ko-KR-InJoonNeural', Gender: 'Male', Locale: 'ko-KR' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (ko-KR, SunHiNeural)', ShortName: 'ko-KR-SunHiNeural', Gender: 'Female', Locale: 'ko-KR' },
  // ... (Lao, Lithuanian, Latvian, Macedonian, Malayalam, Mongolian, Marathi, Malay, Maltese, Burmese, Norwegian, Dutch, Polish, Pashto, Portuguese) ...
  { Name: 'Microsoft Server Speech Text to Speech Voice (pt-BR, AntonioNeural)', ShortName: 'pt-BR-AntonioNeural', Gender: 'Male', Locale: 'pt-BR' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (pt-BR, FranciscaNeural)', ShortName: 'pt-BR-FranciscaNeural', Gender: 'Female', Locale: 'pt-BR' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (pt-PT, DuarteNeural)', ShortName: 'pt-PT-DuarteNeural', Gender: 'Male', Locale: 'pt-PT' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (pt-PT, RaquelNeural)', ShortName: 'pt-PT-RaquelNeural', Gender: 'Female', Locale: 'pt-PT' },
  // ... (Romanian, Russian, Sinhala, Slovak, Slovenian, Somali, Albanian, Serbian, Sundanese, Swedish, Swahili, Tamil, Telugu, Thai) ...
  { Name: 'Microsoft Server Speech Text to Speech Voice (th-TH, NiwatNeural)', ShortName: 'th-TH-NiwatNeural', Gender: 'Male', Locale: 'th-TH' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (th-TH, PremwadeeNeural)', ShortName: 'th-TH-PremwadeeNeural', Gender: 'Female', Locale: 'th-TH' },
  // ... (Turkish, Ukrainian, Urdu, Uzbek, Vietnamese) ...
  { Name: 'Microsoft Server Speech Text to Speech Voice (vi-VN, HoaiMyNeural)', ShortName: 'vi-VN-HoaiMyNeural', Gender: 'Female', Locale: 'vi-VN' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (vi-VN, NamMinhNeural)', ShortName: 'vi-VN-NamMinhNeural', Gender: 'Male', Locale: 'vi-VN' },
  // ... (Chinese variants) ...
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-CN, XiaoxiaoNeural)', ShortName: 'zh-CN-XiaoxiaoNeural', Gender: 'Female', Locale: 'zh-CN' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-CN, YunxiNeural)', ShortName: 'zh-CN-YunxiNeural', Gender: 'Male', Locale: 'zh-CN' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-CN, YunjianNeural)', ShortName: 'zh-CN-YunjianNeural', Gender: 'Male', Locale: 'zh-CN' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-CN, YunxiaNeural)', ShortName: 'zh-CN-YunxiaNeural', Gender: 'Male', Locale: 'zh-CN' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-CN, YunyangNeural)', ShortName: 'zh-CN-YunyangNeural', Gender: 'Male', Locale: 'zh-CN' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-CN-liaoning, XiaobeiNeural)', ShortName: 'zh-CN-liaoning-XiaobeiNeural', Gender: 'Female', Locale: 'zh-CN-liaoning' },
  // { Name: 'Microsoft Server Speech Text to Speech Voice (zh-CN-shaanxi, XiaoniNeural)', ShortName: 'zh-CN-shaanxi-XiaoniNeural', Gender: 'Female', Locale: 'zh-CN-shaanxi' }, // Example regional voice
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-HK, HiuGaaiNeural)', ShortName: 'zh-HK-HiuGaaiNeural', Gender: 'Female', Locale: 'zh-HK' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-HK, HiuMaanNeural)', ShortName: 'zh-HK-HiuMaanNeural', Gender: 'Female', Locale: 'zh-HK' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-HK, WanLungNeural)', ShortName: 'zh-HK-WanLungNeural', Gender: 'Male', Locale: 'zh-HK' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-TW, HsiaoChenNeural)', ShortName: 'zh-TW-HsiaoChenNeural', Gender: 'Female', Locale: 'zh-TW' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-TW, HsiaoYuNeural)', ShortName: 'zh-TW-HsiaoYuNeural', Gender: 'Female', Locale: 'zh-TW' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (zh-TW, YunJheNeural)', ShortName: 'zh-TW-YunJheNeural', Gender: 'Male', Locale: 'zh-TW' },
  // ... (Zulu) ...
  { Name: 'Microsoft Server Speech Text to Speech Voice (zu-ZA, ThandoNeural)', ShortName: 'zu-ZA-ThandoNeural', Gender: 'Female', Locale: 'zu-ZA' },
  { Name: 'Microsoft Server Speech Text to Speech Voice (zu-ZA, ThembaNeural)', ShortName: 'zu-ZA-ThembaNeural', Gender: 'Male', Locale: 'zu-ZA' },
];
// --- END OF HARDCODED VOICE LIST ---


/**
 * 免费在线TTS服务
 * 使用免费的在线TTS服务，不需要API密钥
 */
class MsTTSService {
  private static instance: MsTTSService;
  private tempDir: string;

  private constructor() {
    this.tempDir = path.join(app.getPath('temp'), 'cherry-tts');
    if (!fs.existsSync(this.tempDir)) {
      fs.mkdirSync(this.tempDir, { recursive: true });
    }
    log.info('初始化免费在线TTS服务 (使用硬编码语音列表)');
  }

  public static getInstance(): MsTTSService {
    if (!MsTTSService.instance) {
      MsTTSService.instance = new MsTTSService();
    }
    return MsTTSService.instance;
  }

  /**
   * 获取可用的语音列表 (返回硬编码列表)
   * @returns 语音列表
   */
  public async getVoices(): Promise<any[]> {
    try {
      log.info(`返回硬编码的 ${hardcodedVoices.length} 个语音列表`);
      // 直接返回硬编码的列表
      // 注意：保持 async 是为了接口兼容性，虽然这里没有实际的异步操作
      return hardcodedVoices;
    } catch (error) {
       // 这个 try/catch 在这里意义不大了，因为返回静态数据不会出错
       // 但保留结构以防未来改动
      log.error('获取硬编码语音列表时出错 (理论上不应发生):', error);
      return []; // 返回空列表以防万一
    }
  }

  /**
   * 合成语音
   * @param text 要合成的文本
   * @param voice 语音的 ShortName (例如 'zh-CN-XiaoxiaoNeural')
   * @param outputFormat 输出格式 (例如 'audio-24khz-48kbitrate-mono-mp3')
   * @returns 音频文件路径
   */
  public async synthesize(text: string, voice: string, outputFormat: string): Promise<string> {
    try {
      // 记录详细的请求信息
      log.info(`微软在线TTS合成语音: 文本="${text.substring(0, 30)}...", 语音=${voice}, 格式=${outputFormat}`);

      // 验证输入参数
      if (!text || text.trim() === '') {
        throw new Error('要合成的文本不能为空');
      }

      if (!voice || voice.trim() === '') {
        throw new Error('语音名称不能为空');
      }

      // 创建一个新的EdgeTTS实例，并设置参数
      // 添加超时设置，默认为30秒
      const tts = new EdgeTTS({
        voice: voice,
        outputFormat: outputFormat,
        timeout: 30000, // 30秒超时
        rate: '+0%',   // 正常语速
        pitch: '+0Hz', // 正常音调
        volume: '+0%'  // 正常音量
      });

      // 生成临时文件路径
      const timestamp = Date.now();
      const fileExtension = outputFormat.includes('mp3') ? 'mp3' : outputFormat.split('-').pop() || 'audio';
      const outputPath = path.join(this.tempDir, `tts_${timestamp}.${fileExtension}`);

      log.info(`开始生成语音文件: ${outputPath}`);

      // 使用ttsPromise方法生成文件
      await tts.ttsPromise(text, outputPath);

      // 验证生成的文件是否存在且大小大于0
      if (!fs.existsSync(outputPath)) {
        throw new Error(`生成的语音文件不存在: ${outputPath}`);
      }

      const stats = fs.statSync(outputPath);
      if (stats.size === 0) {
        throw new Error(`生成的语音文件大小为0: ${outputPath}`);
      }

      log.info(`微软在线TTS合成成功: ${outputPath}, 文件大小: ${stats.size} 字节`);
      return outputPath;
    } catch (error: any) {
      // 记录详细的错误信息
      log.error(`微软在线TTS语音合成失败 (语音=${voice}):`, error);

      // 尝试提供更有用的错误信息
      if (error.message && typeof error.message === 'string') {
        if (error.message.includes('Timed out')) {
          throw new Error(`语音合成超时，请检查网络连接或尝试其他语音`);
        } else if (error.message.includes('ENOTFOUND')) {
          throw new Error(`无法连接到微软语音服务，请检查网络连接`);
        } else if (error.message.includes('ECONNREFUSED')) {
          throw new Error(`连接被拒绝，请检查网络设置或代理配置`);
        }
      }

      throw error;
    }
  }

   /**
   * (可选) 清理临时文件目录
   */
  public async cleanupTempDir(): Promise<void> {
    // (Cleanup method remains the same)
     try {
      const files = await fs.promises.readdir(this.tempDir);
      for (const file of files) {
        if (file.startsWith('tts_')) {
          await fs.promises.unlink(path.join(this.tempDir, file));
        }
      }
      log.info('TTS 临时文件已清理');
    } catch (error) {
      log.error('清理 TTS 临时文件失败:', error);
    }
  }
}

// 导出单例方法 (保持不变)
export const getVoices = async () => {
  return await MsTTSService.getInstance().getVoices();
};

export const synthesize = async (text: string, voice: string, outputFormat: string) => {
  return await MsTTSService.getInstance().synthesize(text, voice, outputFormat);
};

export const cleanupTtsTempFiles = async () => {
  await MsTTSService.getInstance().cleanupTempDir();
};