import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../services/storage_service.dart';

enum AppThemeMode { light, dark, system }

class SettingsState {
  final bool pushNotification;
  final bool soundNotification;
  final AppThemeMode themeMode;
  final Locale locale;

  const SettingsState({
    this.pushNotification = true,
    this.soundNotification = true,
    this.themeMode = AppThemeMode.light,
    this.locale = const Locale('zh', 'CN'),
  });

  SettingsState copyWith({
    bool? pushNotification,
    bool? soundNotification,
    AppThemeMode? themeMode,
    Locale? locale,
  }) {
    return SettingsState(
      pushNotification: pushNotification ?? this.pushNotification,
      soundNotification: soundNotification ?? this.soundNotification,
      themeMode: themeMode ?? this.themeMode,
      locale: locale ?? this.locale,
    );
  }

  ThemeMode get flutterThemeMode {
    switch (themeMode) {
      case AppThemeMode.light:
        return ThemeMode.light;
      case AppThemeMode.dark:
        return ThemeMode.dark;
      case AppThemeMode.system:
        return ThemeMode.system;
    }
  }
}

class SettingsNotifier extends StateNotifier<SettingsState> {
  SettingsNotifier() : super(const SettingsState()) {
    _loadSettings();
  }

  Future<void> _loadSettings() async {
    await storageService.init();
    final push = storageService.getBool('push_notification');
    final sound = storageService.getBool('sound_notification');
    final theme = storageService.getString('theme_mode');
    final lang = storageService.getString('locale');

    state = state.copyWith(
      pushNotification: push ?? true,
      soundNotification: sound ?? true,
      themeMode: theme != null
          ? AppThemeMode.values.byName(theme)
          : AppThemeMode.light,
      locale: lang != null
          ? Locale(lang.split('_')[0], lang.split('_')[1])
          : const Locale('zh', 'CN'),
    );
  }

  Future<void> setPushNotification(bool value) async {
    await storageService.setBool('push_notification', value);
    state = state.copyWith(pushNotification: value);
  }

  Future<void> setSoundNotification(bool value) async {
    await storageService.setBool('sound_notification', value);
    state = state.copyWith(soundNotification: value);
  }

  Future<void> setThemeMode(AppThemeMode mode) async {
    await storageService.setString('theme_mode', mode.name);
    state = state.copyWith(themeMode: mode);
  }

  Future<void> setLocale(Locale locale) async {
    await storageService.setString('locale', '${locale.languageCode}_${locale.countryCode}');
    state = state.copyWith(locale: locale);
  }
}

final settingsProvider = StateNotifierProvider<SettingsNotifier, SettingsState>((ref) {
  return SettingsNotifier();
});