lib/src/presentation/providers/settings_provider.dart

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

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

class Settings {
  final bool useKg;
  final ThemeMode themeMode;
  final bool showDemoData;
  
  const Settings({
    this.useKg = true,
    this.themeMode = ThemeMode.system,
    this.showDemoData = false,
  });
  
  Settings copyWith({
    bool? useKg,
    ThemeMode? themeMode,
    bool? showDemoData,
  }) {
    return Settings(
      useKg: useKg ?? this.useKg,
      themeMode: themeMode ?? this.themeMode,
      showDemoData: showDemoData ?? this.showDemoData,
    );
  }
}

class SettingsNotifier extends StateNotifier<Settings> {
  late SharedPreferences _prefs;
  
  SettingsNotifier() : super(const Settings()) {
    _loadSettings();
  }
  
  Future<void> _loadSettings() async {
    _prefs = await SharedPreferences.getInstance();
    state = Settings(
      useKg: _prefs.getBool('useKg') ?? true,
      themeMode: ThemeMode.values[_prefs.getInt('themeMode') ?? 0],
      showDemoData: _prefs.getBool('showDemoData') ?? false,
    );
  }
  
  Future<void> setUseKg(bool value) async {
    await _prefs.setBool('useKg', value);
    state = state.copyWith(useKg: value);
  }
  
  Future<void> setThemeMode(ThemeMode mode) async {
    await _prefs.setInt('themeMode', mode.index);
    state = state.copyWith(themeMode: mode);
  }
  
  Future<void> setShowDemoData(bool value) async {
    await _prefs.setBool('showDemoData', value);
    state = state.copyWith(showDemoData: value);
  }
  
  Future<void> resetSettings() async {
    await _prefs.clear();
    state = const Settings();
  }
}