import 'package:flisp_app/utils/theme_utils.dart';
import 'package:flutter/material.dart';
import 'package:package_info_plus/package_info_plus.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';
  static const List<String> appBarTitles = ['闪灵', '待办', '日程', '统计'];

  int currentTab = 0;
  String currentAppBarTitle = '闪灵';
  bool isDarkMode = false;
  ThemeColor currentTheme = defaultThemes[0];
  String appVersion = '1.0.0';
  String buildNumber = '1';

  late SharedPreferences _prefs;
  bool isInitialized = false;

  AppProvider() {
    _initPreferences();
  }

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

    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) {
      currentTheme = getThemeColor(themeName);
    }
  }

  Future<void> _getVersionInfo() async {
    try {
      PackageInfo packageInfo = await PackageInfo.fromPlatform();
      appVersion = packageInfo.version;
      buildNumber = packageInfo.buildNumber;
      notifyListeners();
    } catch (e) {
      print('获取版本信息失败: $e');
    }
  }

  // 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);
  }

  List<ThemeColor> get availableThemes => defaultThemes;

  String get fullVersion => '$appVersion+$buildNumber';

  void changeTab(int index) {
    currentTab = index;
    currentAppBarTitle = appBarTitles[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',
    );
  }
}