import 'package:flutter/material.dart';

import '../../../../l10n/app_localizations.dart';

String displayLanguageLabel(AppLocalizations l10n, String languageTag) {
  return switch (languageTag) {
    'en-US' => l10n.english,
    _ => l10n.chinese,
  };
}

class PreferenceSettings {
  const PreferenceSettings({
    this.interfaceLanguage = 'zh-CN',
    this.aiLanguage = 'zh-CN',
    this.timezone = 'Asia/Shanghai',
    this.country = 'CN',
  });

  final String interfaceLanguage;
  final String aiLanguage;
  final String timezone;
  final String country;

  PreferenceSettings copyWith({
    String? interfaceLanguage,
    String? aiLanguage,
    String? timezone,
    String? country,
  }) {
    return PreferenceSettings(
      interfaceLanguage: interfaceLanguage ?? this.interfaceLanguage,
      aiLanguage: aiLanguage ?? this.aiLanguage,
      timezone: timezone ?? this.timezone,
      country: country ?? this.country,
    );
  }
}

class ProfileSettingsV1 {
  const ProfileSettingsV1({
    this.version = 1,
    this.preferences = const PreferenceSettings(),
    this.privacy = const <String, Object?>{},
    this.notification = const <String, Object?>{},
  });

  final int version;
  final PreferenceSettings preferences;
  final Map<String, Object?> privacy;
  final Map<String, Object?> notification;

  ProfileSettingsV1 copyWith({
    int? version,
    PreferenceSettings? preferences,
    Map<String, Object?>? privacy,
    Map<String, Object?>? notification,
  }) {
    return ProfileSettingsV1(
      version: version ?? this.version,
      preferences: preferences ?? this.preferences,
      privacy: privacy ?? this.privacy,
      notification: notification ?? this.notification,
    );
  }

  factory ProfileSettingsV1.defaultsForLocale(Locale locale) {
    final tag = languageTagFromLocale(locale);
    return ProfileSettingsV1(
      preferences: PreferenceSettings(interfaceLanguage: tag, aiLanguage: tag),
    );
  }
}

String languageTagFromLocale(Locale locale) {
  switch (locale.languageCode) {
    case 'en':
      return 'en-US';
    case 'zh':
    default:
      return 'zh-CN';
  }
}

Locale localeFromLanguageTag(String tag) {
  if (tag.toLowerCase().startsWith('en')) {
    return const Locale('en');
  }
  return const Locale('zh');
}