import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'settings_state.dart';

class SettingsCubit extends Cubit<SettingsState> {
  SettingsCubit(this._prefs) : super(_read(_prefs));

  final SharedPreferences _prefs;

  static const _kTheme = 'settings.theme_mode';
  static const _kLocale = 'settings.locale';

  /// تُقرأ **متزامنة** في الباني: تأخير القراءة يعني ومضة بالثيم الخاطئ عند
  /// كل إقلاع.
  static SettingsState _read(SharedPreferences prefs) {
    return SettingsState(
      themeMode: switch (prefs.getString(_kTheme)) {
        'light' => ThemeMode.light,
        'dark' => ThemeMode.dark,
        _ => ThemeMode.system,
      },
      locale: Locale(prefs.getString(_kLocale) ?? 'ar'),
    );
  }

  Future<void> setThemeMode(ThemeMode mode) async {
    emit(state.copyWith(themeMode: mode));
    await _prefs.setString(_kTheme, mode.name);
  }

  Future<void> setLocale(Locale locale) async {
    emit(state.copyWith(locale: locale));
    await _prefs.setString(_kLocale, locale.languageCode);
  }
}