import 'package:get/get.dart';
import 'package:shared_preferences/shared_preferences.dart';

class CareController extends GetxController {
  static const String _careModeKey = 'care_mode_enabled';
  static const String _userTypeKey = 'care_user_type';
  static const String _pinyinEnabledKey = 'care_pinyin_enabled';
  static const String _selectedOptionsKey = 'care_selected_options';
  static const String _careNavigationIndexKey = 'care_navigation_index';

  final RxBool _isCareModeEnabled = false.obs;
  final RxString _userType = '儿童'.obs;
  final RxBool _pinyinEnabled = false.obs;
  final RxSet<String> _selectedOptions = {'诗词', '出处'}.obs;
  final RxBool isCareButtonVisible = false.obs;
  final RxInt _careNavigationIndex = 0.obs;

  bool get isCareModeEnabled => _isCareModeEnabled.value;
  String get userType => _userType.value;
  bool get pinyinEnabled => _pinyinEnabled.value;
  Set<String> get selectedOptions => _selectedOptions.toSet();
  int get careNavigationIndex => _careNavigationIndex.value;

  @override
  void onInit() {
    super.onInit();
    _loadCareSettings();
  }

  Future<void> _loadCareSettings() async {
    final prefs = await SharedPreferences.getInstance();
    _isCareModeEnabled.value = prefs.getBool(_careModeKey) ?? false;
    _userType.value = prefs.getString(_userTypeKey) ?? '儿童';
    _pinyinEnabled.value = prefs.getBool(_pinyinEnabledKey) ?? false;
    _careNavigationIndex.value = prefs.getInt(_careNavigationIndexKey) ?? 0;

    final savedOptions = prefs.getStringList(_selectedOptionsKey);
    if (savedOptions != null && savedOptions.isNotEmpty) {
      _selectedOptions.clear();
      _selectedOptions.addAll(savedOptions);
      if (!_selectedOptions.contains('诗词')) {
        _selectedOptions.add('诗词');
      }
    }
  }

  Future<void> toggleCareMode() async {
    _isCareModeEnabled.value = !_isCareModeEnabled.value;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setBool(_careModeKey, _isCareModeEnabled.value);
  }

  Future<void> setUserType(String type) async {
    _userType.value = type;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString(_userTypeKey, type);
  }

  Future<void> setPinyinEnabled(bool enabled) async {
    _pinyinEnabled.value = enabled;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setBool(_pinyinEnabledKey, enabled);
  }

  Future<void> toggleOption(String option) async {
    if (option == '诗词') return; // 诗词选项不可取消

    if (_selectedOptions.contains(option)) {
      _selectedOptions.remove(option);
    } else {
      _selectedOptions.add(option);
    }

    final prefs = await SharedPreferences.getInstance();
    await prefs.setStringList(_selectedOptionsKey, _selectedOptions.toList());
  }

  void toggleCareButtonVisibility() {
    isCareButtonVisible.value = !isCareButtonVisible.value;
  }

  Future<void> switchCareNavigation(int index) async {
    _careNavigationIndex.value = index;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setInt(_careNavigationIndexKey, index);
  }
}