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

final themeModeProvider =
    StateNotifierProvider<ThemeModeNotifier, ThemeMode>((ref) {
  return ThemeModeNotifier();
});

class ThemeModeNotifier extends StateNotifier<ThemeMode> {
  ThemeModeNotifier() : super(ThemeMode.system) {
    _load();
  }

  final _storage = const FlutterSecureStorage();
  static const _key = 'theme_mode';

  Future<void> _load() async {
    final value = await _storage.read(key: _key);
    if (value == 'light') state = ThemeMode.light;
    if (value == 'dark') state = ThemeMode.dark;
  }

  Future<void> setTheme(ThemeMode mode) async {
    state = mode;
    final value = mode == ThemeMode.light
        ? 'light'
        : mode == ThemeMode.dark
            ? 'dark'
            : 'system';
    await _storage.write(key: _key, value: value);
  }
}