import 'package:flisp_app/utils/theme_utils.dart';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';

class AppProvider with ChangeNotifier {
  static const String _themeKey = 'selected_theme';
  static const String _darkModeKey = 'is_dark_mode';

  int _currentTab = 0;
  bool _isDarkMode = false;
  ThemeColor _currentTheme = defaultThemes[0];
  late SharedPreferences _prefs;
  bool _isInitialized = false;

  AppProvider() {
    _initPreferences();
  }

  // 初始化 SharedPreferences
  Future<void> _initPreferences() async {
    _prefs = await SharedPreferences.getInstance();
    _loadPreferences();
    _isInitialized = true;
    notifyListeners();
  }

  // 加载存储的设置
  void _loadPreferences() {
    _isDarkMode = _prefs.getBool(_darkModeKey) ?? false;

    // 加载主题色
    final themeName = _prefs.getString(_themeKey);
    if (themeName != null) {
      // 根据主题名称查找对应的主题
      final savedTheme = defaultThemes.firstWhere(
            (theme) => theme.name == themeName,
        orElse: () => defaultThemes[0],
      );
      _currentTheme = savedTheme;
    }
  }

  // 保存主题色
  Future<void> _saveTheme() async {
    await _prefs.setString(_themeKey, _currentTheme.name);
  }

  // 保存暗黑模式
  Future<void> _saveDarkMode() async {
    await _prefs.setBool(_darkModeKey, _isDarkMode);
  }

  int get currentTab => _currentTab;

  bool get isDarkMode => _isDarkMode;

  ThemeColor get currentTheme => _currentTheme;

  List<ThemeColor> get availableThemes => defaultThemes;

  bool get isInitialized => _isInitialized;

  void changeTab(int index) {
    _currentTab = index;
    notifyListeners();
  }

  // 切换明暗模式
  void toggleDarkMode(bool value) {
    _isDarkMode = value;
    _saveDarkMode();
    notifyListeners();
  }

  // 更改主题色
  void changeTheme(ThemeColor theme) {
    _currentTheme = theme;
    _saveTheme();
    notifyListeners();
  }

  ThemeData get currentThemeData {
    return ThemeData(
      primarySwatch: _currentTheme.materialColor,
      colorScheme: ColorScheme.fromSeed(
        seedColor: _currentTheme.primaryColor,
        brightness: _isDarkMode ? Brightness.dark : Brightness.light,
      ),
      useMaterial3: true,
      fontFamily: 'CustomFont',
    );
  }
}