import 'package:get/get.dart';
import '../../core/utils/logger.dart';
import '../models/user_Info.dart';
import '../services/speech_factory.dart';
import 'language_configs/azure_language_config.dart';
import 'language_configs/google_language_config.dart';
import 'language_configs/iflytek_language_config.dart';
import 'language_configs/volcano_language_config.dart';
import 'language_configs/alibaba_language_config.dart';
import 'language_configs/ast_config.dart';

/// 语言信息类，包含语言的各种表示形式
class LanguageInfo {
  /// 短代码，如 'zh', 'en'
  final String shortCode;

  /// 中文名称
  final String chineseName;

  /// 英文名称
  final String englishName;

  /// Azure ASR 语言代码，如 'zh-CN', 'en-US'
  final String asrCode;

  /// Azure TTS 语音名称（女声）
  final String ttsVoiceName;

  /// Azure TTS 语音名称（男声）
  final String ttsVoiceNameMale;

  /// 备注信息
  final String? note;

  LanguageInfo({
    required this.shortCode,
    required this.chineseName,
    required this.englishName,
    required this.asrCode,
    required this.ttsVoiceName,
    required this.ttsVoiceNameMale,
    this.note,
  });
}

/// 语言类型管理类，提供语言信息的查询和转换功能
class LanguageManager extends GetxService {
  // 单例实例
  static LanguageManager? _instance;

  // 单例工厂方法
  factory LanguageManager() {
    _instance ??= LanguageManager._internal();
    return _instance!;
  }

  // 私有构造函数
  LanguageManager._internal() {
    _initLanguageMap();
  }

  // 语言信息映射表，以 ASR 代码为键
  final Map<String, LanguageInfo> _languageMap = {};

  // 中文名称到 ASR 代码的映射
  final Map<String, String> _chineseNameToAsrCodeMap = {};

  // 英文名称到 ASR 代码的映射
  final Map<String, String> _englishNameToAsrCodeMap = {};

  // 短代码到 ASR 代码的映射
  final Map<String, String> _shortCodeToAsrCodeMap = {};

  /// 初始化语言映射表
  void _initLanguageMap() {
    // 中文相关
    _addLanguage(
      shortCode: 'zh',
      chineseName: '中文(简体)',
      englishName: 'Chinese (simplified)',
      asrCode: 'zh-CN',
      ttsVoiceName: 'zh-CN-XiaoxiaoNeural',
      ttsVoiceNameMale: 'zh-CN-YunxiNeural',
    );

    _addLanguage(
      shortCode: 'zh-Hant',
      chineseName: '中文(繁体)',
      englishName: 'Chinese (traditional)',
      asrCode: 'zh-TW',
      ttsVoiceName: 'zh-TW-HsiaoChenNeural',
      ttsVoiceNameMale: 'zh-TW-YunJheNeural',
    );

    _addLanguage(
      shortCode: 'zh-Hant-hk',
      chineseName: '中文(香港繁体)',
      englishName: 'Chinese (Hongkong traditional)',
      asrCode: 'zh-HK',
      ttsVoiceName: 'zh-HK-HiuMaanNeural',
      ttsVoiceNameMale: 'zh-HK-WanLungNeural',
    );

    // 英语相关
    _addLanguage(
      shortCode: 'en',
      chineseName: '英语',
      englishName: 'English',
      asrCode: 'en-US',
      ttsVoiceName: 'en-US-AriaNeural',
      ttsVoiceNameMale: 'en-US-GuyNeural',
    );

    // 日语相关
    _addLanguage(
      shortCode: 'ja',
      chineseName: '日语',
      englishName: 'Japanese',
      asrCode: 'ja-JP',
      ttsVoiceName: 'ja-JP-NanamiNeural',
      ttsVoiceNameMale: 'ja-JP-KeitaNeural',
    );

    // 韩语相关
    _addLanguage(
      shortCode: 'ko',
      chineseName: '韩语',
      englishName: 'Korean',
      asrCode: 'ko-KR',
      ttsVoiceName: 'ko-KR-SunHiNeural',
      ttsVoiceNameMale: 'ko-KR-InJoonNeural',
    );

    // 欧洲语言
    _addLanguage(
      shortCode: 'fr',
      chineseName: '法语',
      englishName: 'French',
      asrCode: 'fr-FR',
      ttsVoiceName: 'fr-FR-DeniseNeural',
      ttsVoiceNameMale: 'fr-FR-HenriNeural',
    );

    _addLanguage(
      shortCode: 'es',
      chineseName: '西班牙语',
      englishName: 'Spanish',
      asrCode: 'es-ES',
      ttsVoiceName: 'es-ES-ElviraNeural',
      ttsVoiceNameMale: 'es-ES-AlvaroNeural',
    );

    _addLanguage(
      shortCode: 'pt',
      chineseName: '葡萄牙语',
      englishName: 'Portuguese',
      asrCode: 'pt-BR',
      ttsVoiceName: 'pt-BR-FranciscaNeural',
      ttsVoiceNameMale: 'pt-BR-AntonioNeural',
    );

    _addLanguage(
      shortCode: 'it',
      chineseName: '意大利语',
      englishName: 'Italian',
      asrCode: 'it-IT',
      ttsVoiceName: 'it-IT-ElsaNeural',
      ttsVoiceNameMale: 'it-IT-DiegoNeural',
    );

    _addLanguage(
      shortCode: 'de',
      chineseName: '德语',
      englishName: 'German',
      asrCode: 'de-DE',
      ttsVoiceName: 'de-DE-KatjaNeural',
      ttsVoiceNameMale: 'de-DE-ConradNeural',
    );

    _addLanguage(
      shortCode: 'ru',
      chineseName: '俄语',
      englishName: 'Russian',
      asrCode: 'ru-RU',
      ttsVoiceName: 'ru-RU-SvetlanaNeural',
      ttsVoiceNameMale: 'ru-RU-DmitryNeural',
    );

    _addLanguage(
      shortCode: 'pl',
      chineseName: '波兰语',
      englishName: 'Polish',
      asrCode: 'pl-PL',
      ttsVoiceName: 'pl-PL-AgnieszkaNeural',
      ttsVoiceNameMale: 'pl-PL-MarekNeural',
    );

    _addLanguage(
      shortCode: 'nl',
      chineseName: '荷兰语',
      englishName: 'Dutch',
      asrCode: 'nl-NL',
      ttsVoiceName: 'nl-NL-ColetteNeural',
      ttsVoiceNameMale: 'nl-NL-MaartenNeural',
    );

    _addLanguage(
      shortCode: 'sv',
      chineseName: '瑞典语',
      englishName: 'Swedish',
      asrCode: 'sv-SE',
      ttsVoiceName: 'sv-SE-SofieNeural',
      ttsVoiceNameMale: 'sv-SE-MattiasNeural',
    );

    _addLanguage(
      shortCode: 'cs',
      chineseName: '捷克语',
      englishName: 'Czech',
      asrCode: 'cs-CZ',
      ttsVoiceName: 'cs-CZ-VlastaNeural',
      ttsVoiceNameMale: 'cs-CZ-AntoninNeural',
    );

    _addLanguage(
      shortCode: 'el',
      chineseName: '现代希腊语',
      englishName: 'Modern Greek',
      asrCode: 'el-GR',
      ttsVoiceName: 'el-GR-AthinaNeural',
      ttsVoiceNameMale: 'el-GR-NestorasNeural',
    );

    _addLanguage(
      shortCode: 'ro',
      chineseName: '罗马尼亚语',
      englishName: 'Romanian',
      asrCode: 'ro-RO',
      ttsVoiceName: 'ro-RO-AlinaNeural',
      ttsVoiceNameMale: 'ro-RO-EmilNeural',
    );

    _addLanguage(
      shortCode: 'hu',
      chineseName: '匈牙利语',
      englishName: 'Hungarian',
      asrCode: 'hu-HU',
      ttsVoiceName: 'hu-HU-NoemiNeural',
      ttsVoiceNameMale: 'hu-HU-TamasNeural',
    );

    _addLanguage(
      shortCode: 'uk',
      chineseName: '乌克兰语',
      englishName: 'Ukrainian',
      asrCode: 'uk-UA',
      ttsVoiceName: 'uk-UA-PolinaNeural',
      ttsVoiceNameMale: 'uk-UA-OstapNeural',
    );

    _addLanguage(
      shortCode: 'da',
      chineseName: '丹麦语',
      englishName: 'Danish',
      asrCode: 'da-DK',
      ttsVoiceName: 'da-DK-ChristelNeural',
      ttsVoiceNameMale: 'da-DK-JeppeNeural',
    );

    _addLanguage(
      shortCode: 'fi',
      chineseName: '芬兰语',
      englishName: 'Finnish',
      asrCode: 'fi-FI',
      ttsVoiceName: 'fi-FI-NooraNeural',
      ttsVoiceNameMale: 'fi-FI-HarriNeural',
    );

    _addLanguage(
      shortCode: 'no',
      chineseName: '挪威语',
      englishName: 'Norwegian',
      asrCode: 'nb-NO',
      ttsVoiceName: 'nb-NO-IselinNeural',
      ttsVoiceNameMale: 'nb-NO-FinnNeural',
    );

    _addLanguage(
      shortCode: 'hr',
      chineseName: '克罗地亚语',
      englishName: 'Croatian',
      asrCode: 'hr-HR',
      ttsVoiceName: 'hr-HR-GabrijelaNeural',
      ttsVoiceNameMale: 'hr-HR-SreckoNeural',
    );

    _addLanguage(
      shortCode: 'ca',
      chineseName: '加泰隆语',
      englishName: 'Catalan',
      asrCode: 'ca-ES',
      ttsVoiceName: 'ca-ES-JoanaNeural',
      ttsVoiceNameMale: 'ca-ES-EnricNeural',
    );

    // 亚洲语言
    _addLanguage(
      shortCode: 'ar',
      chineseName: '阿拉伯语',
      englishName: 'Arabic',
      asrCode: 'ar-EG',
      ttsVoiceName: 'ar-EG-SalmaNeural',
      ttsVoiceNameMale: 'ar-EG-ShakirNeural',
    );

    _addLanguage(
      shortCode: 'th',
      chineseName: '泰语',
      englishName: 'Thai',
      asrCode: 'th-TH',
      ttsVoiceName: 'th-TH-PremwadeeNeural',
      ttsVoiceNameMale: 'th-TH-NiwatNeural',
    );

    _addLanguage(
      shortCode: 'vi',
      chineseName: '越南语',
      englishName: 'Vietnamese',
      asrCode: 'vi-VN',
      ttsVoiceName: 'vi-VN-HoaiMyNeural',
      ttsVoiceNameMale: 'vi-VN-NamMinhNeural',
    );

    _addLanguage(
      shortCode: 'id',
      chineseName: '印尼语',
      englishName: 'Indonesian',
      asrCode: 'id-ID',
      ttsVoiceName: 'id-ID-GadisNeural',
      ttsVoiceNameMale: 'id-ID-ArdiNeural',
    );

    _addLanguage(
      shortCode: 'hi',
      chineseName: '印地语',
      englishName: 'Hindi',
      asrCode: 'hi-IN',
      ttsVoiceName: 'hi-IN-SwaraNeural',
      ttsVoiceNameMale: 'hi-IN-MadhurNeural',
    );

    _addLanguage(
      shortCode: 'tr',
      chineseName: '土耳其语',
      englishName: 'Turkish',
      asrCode: 'tr-TR',
      ttsVoiceName: 'tr-TR-EmelNeural',
      ttsVoiceNameMale: 'tr-TR-AhmetNeural',
    );

    _addLanguage(
      shortCode: 'ms',
      chineseName: '马来语',
      englishName: 'Malay',
      asrCode: 'ms-MY',
      ttsVoiceName: 'ms-MY-YasminNeural',
      ttsVoiceNameMale: 'ms-MY-OsmanNeural',
    );

    _addLanguage(
      shortCode: 'bn',
      chineseName: '孟加拉语',
      englishName: 'Bengali',
      asrCode: 'bn-IN',
      ttsVoiceName: 'bn-IN-TanishaaNeural',
      ttsVoiceNameMale: 'bn-IN-BashkarNeural',
    );

    _addLanguage(
      shortCode: 'ta',
      chineseName: '泰米尔语',
      englishName: 'Tamil',
      asrCode: 'ta-IN',
      ttsVoiceName: 'ta-IN-PallaviNeural',
      ttsVoiceNameMale: 'ta-IN-ValluvarNeural',
    );

    _addLanguage(
      shortCode: 'te',
      chineseName: '泰卢固语',
      englishName: 'Telugu',
      asrCode: 'te-IN',
      ttsVoiceName: 'te-IN-ShrutiNeural',
      ttsVoiceNameMale: 'te-IN-MohanNeural',
    );

    _addLanguage(
      shortCode: 'mr',
      chineseName: '马拉提语',
      englishName: 'Marathi',
      asrCode: 'mr-IN',
      ttsVoiceName: 'mr-IN-AarohiNeural',
      ttsVoiceNameMale: 'mr-IN-ManoharNeural',
    );

    _addLanguage(
      shortCode: 'ur',
      chineseName: '乌尔都语',
      englishName: 'Urdu',
      asrCode: 'ur-IN',
      ttsVoiceName: 'ur-IN-GulNeural',
      ttsVoiceNameMale: 'ur-IN-SalmanNeural',
    );

    _addLanguage(
      shortCode: 'fa',
      chineseName: '波斯语',
      englishName: 'Persian',
      asrCode: 'fa-IR',
      ttsVoiceName: 'fa-IR-DilaraNeural',
      ttsVoiceNameMale: 'fa-IR-FaridNeural',
    );

    // 非洲语言
    _addLanguage(
      shortCode: 'sw',
      chineseName: '斯瓦希里语',
      englishName: 'Swahili',
      asrCode: 'sw-KE',
      ttsVoiceName: 'sw-KE-ZuriNeural',
      ttsVoiceNameMale: 'sw-KE-RafikiNeural',
    );

    Logger.info('语言管理器初始化完成，共加载 ${_languageMap.length} 种语言');
  }

  /// 添加语言信息到映射表
  void _addLanguage({
    required String shortCode,
    required String chineseName,
    required String englishName,
    required String asrCode,
    required String ttsVoiceName,
    required String ttsVoiceNameMale,
    String? note,
  }) {
    final languageInfo = LanguageInfo(
      shortCode: shortCode,
      chineseName: chineseName,
      englishName: englishName,
      asrCode: asrCode,
      ttsVoiceName: ttsVoiceName,
      ttsVoiceNameMale: ttsVoiceNameMale,
      note: note,
    );

    _languageMap[asrCode] = languageInfo;
    _chineseNameToAsrCodeMap[chineseName] = asrCode;
    _englishNameToAsrCodeMap[englishName] = asrCode;
    _shortCodeToAsrCodeMap[shortCode] = asrCode;
  }

  /// 获取所有支持的语言信息
  Map<String, LanguageInfo> getAllLanguages() {
    return Map.from(_languageMap);
  }

  /// 获取所有支持的语言的中文名称
  List<String> getAllChineseNames() {
    return _chineseNameToAsrCodeMap.keys.toList();
  }

  /// 获取所有支持的语言的英文名称
  List<String> getAllEnglishNames() {
    return _englishNameToAsrCodeMap.keys.toList();
  }

  /// 根据 ASR 代码获取语言信息
  LanguageInfo? getLanguageByAsrCode(String asrCode) {
    return _languageMap[asrCode];
  }

  /// 根据中文名称获取语言信息
  LanguageInfo? getLanguageByChineseName(String chineseName) {
    final asrCode = _chineseNameToAsrCodeMap[chineseName];
    if (asrCode == null) return null;
    return _languageMap[asrCode];
  }

  /// 根据英文名称获取语言信息
  LanguageInfo? getLanguageByEnglishName(String englishName) {
    final asrCode = _englishNameToAsrCodeMap[englishName];
    if (asrCode == null) return null;
    return _languageMap[asrCode];
  }

  /// 根据短代码获取语言信息
  LanguageInfo? getLanguageByShortCode(String shortCode) {
    final asrCode = _shortCodeToAsrCodeMap[shortCode];
    if (asrCode == null) return null;
    return _languageMap[asrCode];
  }

  /// 根据中文名称获取 ASR 代码
  String? getAsrCodeByChineseName(String chineseName) {
    return _chineseNameToAsrCodeMap[chineseName];
  }

  /// 根据英文名称获取 ASR 代码
  String? getAsrCodeByEnglishName(String englishName) {
    return _englishNameToAsrCodeMap[englishName];
  }

  /// 根据短代码获取 ASR 代码
  String? getAsrCodeByShortCode(String shortCode) {
    return _shortCodeToAsrCodeMap[shortCode];
  }

  /// 根据 ASR 代码获取中文名称
  String? getChineseNameByAsrCode(String asrCode) {
    final languageInfo = _languageMap[asrCode];
    return languageInfo?.chineseName;
  }

  /// 根据 ASR 代码获取英文名称
  String? getEnglishNameByAsrCode(String asrCode) {
    final languageInfo = _languageMap[asrCode];
    return languageInfo?.englishName;
  }

  /// 根据 ASR 代码获取短代码
  String? getShortCodeByAsrCode(String asrCode) {
    final languageInfo = _languageMap[asrCode];
    return languageInfo?.shortCode;
  }

  /// 根据 shortCode 获取性别适配的 TTS 音色（用于 findBestMatchingProvider）
  String? _getGenderAwareTtsCode(String shortCode) {
    final asrCode = _shortCodeToAsrCodeMap[shortCode];
    if (asrCode == null) return null;
    return _getVoiceByGender(_languageMap[asrCode]);
  }

  /// 根据用户性别获取对应的 TTS 语音名称
  /// gender: 0=未设置(默认女声), 1=男, 2=女
  String? _getVoiceByGender(LanguageInfo? info) {
    if (info == null) return null;
    try {
      final gender = User.instance.gender;
      final voice = gender == 1 ? info.ttsVoiceNameMale : info.ttsVoiceName;
      Logger.debug('TTS音色选择: gender=$gender, voice=$voice');
      return voice;
    } catch (_) {
      Logger.debug('TTS音色选择: 用户未初始化，使用默认女声');
      return info.ttsVoiceName;
    }
  }

  /// 根据 ASR 代码获取 TTS 语音名称（根据用户性别自动选择）
  String? getTtsVoiceNameByAsrCode(String asrCode) {
    return _getVoiceByGender(_languageMap[asrCode]);
  }

  /// 根据中文名称获取 TTS 语音名称（根据用户性别自动选择）
  String? getTtsVoiceNameByChineseName(String chineseName) {
    final asrCode = _chineseNameToAsrCodeMap[chineseName];
    if (asrCode == null) return null;
    return _getVoiceByGender(_languageMap[asrCode]);
  }

  /// 根据短代码获取中文名称
  String? getChineseNameByShortCode(String shortCode) {
    final asrCode = _shortCodeToAsrCodeMap[shortCode];
    if (asrCode == null) return null;
    return _languageMap[asrCode]?.chineseName;
  }

  /// 根据短代码获取英文名称
  String? getEnglishNameByShortCode(String shortCode) {
    final asrCode = _shortCodeToAsrCodeMap[shortCode];
    if (asrCode == null) return null;
    return _languageMap[asrCode]?.englishName;
  }

  /// 根据短代码获取 TTS 语音名称（根据用户性别自动选择）
  String? getTtsVoiceNameByShortCode(String shortCode) {
    final asrCode = _shortCodeToAsrCodeMap[shortCode];
    if (asrCode == null) return null;
    return _getVoiceByGender(_languageMap[asrCode]);
  }

  /// 获取中文名称到 ASR 代码的映射
  Map<String, String> getChineseNameToAsrCodeMap() {
    return Map.from(_chineseNameToAsrCodeMap);
  }

  /// 获取英文名称到 ASR 代码的映射
  Map<String, String> getEnglishNameToAsrCodeMap() {
    return Map.from(_englishNameToAsrCodeMap);
  }

  /// 获取短代码到 ASR 代码的映射
  Map<String, String> getShortCodeToAsrCodeMap() {
    return Map.from(_shortCodeToAsrCodeMap);
  }

  /// 返回当前所有的AST语言配置（中文名称）
  List<String> getAllAstLanguageNames() {
    return getAstLanguageConfigs()
        .map((e) => e['chineseName'] ?? '')
        .where((e) => e.isNotEmpty)
        .toList();
  }

  /// 查找同时支持源语言和目标语言的最佳提供商（通过 shortCode 匹配）
  /// 优先级：豆包(Volcano) > 阿里(Alibaba) > 微软(Azure) > 讯飞(Iflytek)
  BestProviderResult? findBestMatchingProvider(
      String sourceShortCode, String targetShortCode) {
    final providers = [
      SpeechServiceType.volcano,
      SpeechServiceType.alibaba,
      SpeechServiceType.azure,
      SpeechServiceType.iflytek,
    ];

    for (final provider in providers) {
      final transSpecs = _getTranslationSpecs(provider);

      Map<String, String>? sourceTransSpec;
      Map<String, String>? targetTransSpec;

      for (final spec in transSpecs) {
        if (spec['shortCode'] == sourceShortCode) {
          sourceTransSpec ??= {};
          sourceTransSpec["translationCode"] = spec["translationCode"]!;
        }
        if (spec['shortCode'] == targetShortCode) {
          targetTransSpec ??= {};
          targetTransSpec["translationCode"] = spec["translationCode"]!;
        }
      }

      if (sourceTransSpec == null || targetTransSpec == null) {
        continue;
      }

      // 豆包特殊限制：源语言或目标语言必须有一个是中文或英语
      if (provider == SpeechServiceType.volcano) {
        final isSourceZhOrEn =
            sourceShortCode == 'zh' || sourceShortCode == 'en';
        final isTargetZhOrEn =
            targetShortCode == 'zh' || targetShortCode == 'en';
        if (!isSourceZhOrEn && !isTargetZhOrEn) {
          continue;
        }
      }

      // 对于非端到端服务（Azure, Iflytek），还需要检查 ASR 和 TTS 支持
      if (provider != SpeechServiceType.volcano &&
          provider != SpeechServiceType.alibaba) {
        final asrSpecs = _getAsrSpecs(provider);
        final ttsSpecs = _getTtsSpecs(provider);

        for (final spec in asrSpecs) {
          if (spec['shortCode'] == sourceShortCode) {
            sourceTransSpec["asrCode"] = spec["asrCode"]!;
          }
          if (spec['shortCode'] == targetShortCode) {
            targetTransSpec["asrCode"] = spec["asrCode"]!;
          }
        }

        for (final spec in ttsSpecs) {
          if (spec['shortCode'] == sourceShortCode) {
            sourceTransSpec["ttsCode"] =
                _getGenderAwareTtsCode(spec['shortCode']!) ?? spec["ttsVoiceName"]!;
          }
          if (spec['shortCode'] == targetShortCode) {
            targetTransSpec["ttsCode"] =
                _getGenderAwareTtsCode(spec['shortCode']!) ?? spec["ttsVoiceName"]!;
          }
        }
      } else if (provider == SpeechServiceType.alibaba) {
        final ttsSpecs = _getTtsSpecs(provider);
        for (final spec in ttsSpecs) {
          if (spec['shortCode'] == sourceShortCode) {
            sourceTransSpec["ttsCode"] =
                _getGenderAwareTtsCode(spec['shortCode']!) ?? spec["ttsVoiceName"]!;
          }
          if (spec['shortCode'] == targetShortCode) {
            targetTransSpec["ttsCode"] =
                _getGenderAwareTtsCode(spec['shortCode']!) ?? spec["ttsVoiceName"]!;
          }
        }
      }

      final providerString = _providerStringFromType(provider);
      Logger.info(
          'Found best provider: $providerString for $sourceShortCode -> $targetShortCode, sourceTts=${sourceTransSpec["ttsCode"]}, targetTts=${targetTransSpec["ttsCode"]}');
      return BestProviderResult(
          providerString, sourceTransSpec, targetTransSpec);
    }

    return null;
  }

  String _providerStringFromType(SpeechServiceType type) {
    switch (type) {
      case SpeechServiceType.iflytek:
        return 'iflytek';
      case SpeechServiceType.azure:
        return 'azure';
      case SpeechServiceType.google:
        return 'google';
      case SpeechServiceType.alibaba:
        return 'alibaba';
      case SpeechServiceType.volcano:
        return 'volcano';
      case SpeechServiceType.flutter:
        return 'flutter';
    }
  }

  // ===== 私有工具方法：加载不同提供商的语言规格 =====

  List<Map<String, String>> _getAsrSpecs(SpeechServiceType provider) {
    switch (provider) {
      case SpeechServiceType.azure:
        return getAzureASRLanguageSpecs();
      case SpeechServiceType.google:
        return getGoogleASRLanguageSpecs();
      case SpeechServiceType.iflytek:
        return getIflytekASRLanguageSpecs();
      default:
        return getAzureASRLanguageSpecs();
    }
  }

  List<Map<String, String>> _getTranslationSpecs(SpeechServiceType provider) {
    switch (provider) {
      case SpeechServiceType.azure:
        return getAzureTranslationLanguageSpecs();
      case SpeechServiceType.google:
        return getGoogleTranslationLanguageSpecs();
      case SpeechServiceType.iflytek:
        return getIflytekTranslationLanguageSpecs();
      case SpeechServiceType.volcano:
        return getVolcanoTranslationLanguageSpecs();
      case SpeechServiceType.alibaba:
        return getAlibabaTranslationLanguageSpecs();
      default:
        return getAzureTranslationLanguageSpecs();
    }
  }

  List<Map<String, String>> _getTtsSpecs(SpeechServiceType provider) {
    switch (provider) {
      case SpeechServiceType.azure:
        return getAzureTTSLanguageSpecs();
      case SpeechServiceType.google:
        return getGoogleTTSLanguageSpecs();
      case SpeechServiceType.iflytek:
        return getIflytekTTSLanguageSpecs();
      case SpeechServiceType.alibaba:
        return getAlibabaTranslationLanguageSpecs();
      default:
        return getAzureTTSLanguageSpecs();
    }
  }
}

class BestProviderResult {
  final String provider;
  final Map<String, String> sourceSpec;
  final Map<String, String> targetSpec;

  BestProviderResult(this.provider, this.sourceSpec, this.targetSpec);
}