xianyan/lib/l10n/translation_resolver.dart

/// ============================================================
/// 闲言APP — 翻译解析器与Provider
/// 创建时间: 2026-05-29
/// 更新时间: 2026-05-29
/// 作用: 根据语言ID/系统语言解析翻译，提供Riverpod Provider
/// 上次更新: 从translations.dart拆分，引用改为公开语言常量
/// ============================================================

import 'package:flutter/widgets.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../features/mine/settings/providers/general_settings_provider.dart';
import 'types/t.dart';
import 'languages/zh_cn.dart';
import 'languages/en.dart';
import 'languages/ja.dart';
import 'languages/zh_tw.dart';
import 'languages/ko.dart';
import 'languages/de.dart';
import 'languages/it.dart';
import 'languages/es.dart';
import 'languages/ar.dart';
import 'languages/bn.dart';
import 'languages/hi.dart';
import 'languages/pt.dart';
import 'languages/ru.dart';
import 'languages/fr.dart';
import 't_func.dart';

/// 根据语言ID获取翻译映射
T getTranslations(String languageId) {
  switch (languageId) {
    case 'en':
      return en;
    case 'ja':
      return ja;
    case 'zh_TW':
      return zhTW;
    case 'ko':
      return ko;
    case 'de':
      return de;
    case 'it':
      return it;
    case 'es':
      return es;
    case 'ar':
      return ar;
    case 'bn':
      return bn;
    case 'hi':
      return hi;
    case 'pt':
      return pt;
    case 'ru':
      return ru;
    case 'fr':
      return fr;
    default:
      return zhCN;
  }
}

/// 解析系统语言对应的翻译
T _resolveSystemTranslations() {
  final systemLocale = WidgetsBinding.instance.platformDispatcher.locale;
  final langCode = systemLocale.languageCode;
  final countryCode = systemLocale.countryCode;
  if (langCode == 'zh') {
    if (countryCode == 'TW' || countryCode == 'HK' || countryCode == 'MO') {
      return zhTW;
    }
    return zhCN;
  }
  switch (langCode) {
    case 'en':
      return en;
    case 'ja':
      return ja;
    case 'ko':
      return ko;
    case 'de':
      return de;
    case 'it':
      return it;
    case 'es':
      return es;
    case 'ar':
      return ar;
    case 'bn':
      return bn;
    case 'hi':
      return hi;
    case 'pt':
      return pt;
    case 'ru':
      return ru;
    case 'fr':
      return fr;
    default:
      return zhCN;
  }
}

/// 解析系统语言对应的语言ID
String _resolveSystemLanguageId() {
  final systemLocale = WidgetsBinding.instance.platformDispatcher.locale;
  final langCode = systemLocale.languageCode;
  final countryCode = systemLocale.countryCode;
  if (langCode == 'zh') {
    if (countryCode == 'TW' || countryCode == 'HK' || countryCode == 'MO') {
      return 'zh_TW';
    }
    return 'zh_CN';
  }
  switch (langCode) {
    case 'en':
      return 'en';
    case 'ja':
      return 'ja';
    case 'ko':
      return 'ko';
    case 'de':
      return 'de';
    case 'it':
      return 'it';
    case 'es':
      return 'es';
    case 'ar':
      return 'ar';
    case 'bn':
      return 'bn';
    case 'hi':
      return 'hi';
    case 'pt':
      return 'pt';
    case 'ru':
      return 'ru';
    case 'fr':
      return 'fr';
    default:
      return 'zh_CN';
  }
}

/// 翻译Provider — 根据设置的语言ID提供翻译映射
final translationsProvider = Provider<T>((ref) {
  final settings = ref.watch(generalSettingsProvider);
  final languageId = settings.languageId;
  if (languageId == 'system') {
    return _resolveSystemTranslations();
  }
  return getTranslations(languageId);
});

/// 动态翻译函数Provider — 根据设置的语言ID提供TFunc实例
final translationsFuncProvider = Provider<TFunc>((ref) {
  final settings = ref.watch(generalSettingsProvider);
  final languageId = settings.languageId;
  if (languageId == 'system') {
    return TFunc(_resolveSystemLanguageId());
  }
  return TFunc(languageId);
});