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

/// الإعدادات العامة: الثيم + اللغة.
/// يُحفظ محلياً عبر SharedPreferences (ليس سراً — docs/26 §4).
class SettingsCubit extends Cubit<SettingsState> {
  static const _kThemeKey = 'settings_theme_mode';
  static const _kLocaleKey = 'settings_locale';

  SettingsCubit() : super(const SettingsState()) {
    _load();
  }

  Future<void> _load() async {
    final prefs = await SharedPreferences.getInstance();
    final themeIndex = prefs.getInt(_kThemeKey) ?? 0;
    final localeCode = prefs.getString(_kLocaleKey) ?? 'ar';

    emit(state.copyWith(
      themeMode: ThemeMode.values[themeIndex],
      locale: Locale(localeCode),
    ));
  }

  Future<void> setThemeMode(ThemeMode mode) async {
    emit(state.copyWith(themeMode: mode));
    final prefs = await SharedPreferences.getInstance();
    await prefs.setInt(_kThemeKey, mode.index);
  }

  Future<void> setLocale(Locale locale) async {
    emit(state.copyWith(locale: locale));
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString(_kLocaleKey, locale.languageCode);
  }
}