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

import '../config/size_config.dart';
import '../models/users.dart';

class Utils extends ChangeNotifier {
  // Singleton instance
  static final Utils _instance = Utils._internal();

  factory Utils() {
    return _instance;
  }
  Utils._internal();
  users? _user;
  bool isValidToken = false;
  SharedPreferences? prefs;
  bool? svgError;
  int? currentrideid;
  bool initialized = false;
  String? _token="InvalidToken";

  double _heightMultiplier = 0;
  double _widthMultiplier = 0;
  double _textMultiplier = 0;



  // Getters for size multipliers
  String? get token => _token;
  double get heightMultiplier => _heightMultiplier;
  double get widthMultiplier => _widthMultiplier;
  double get textMultiplier => _textMultiplier;
  Future<String> getToken() async {
    final prefs = await SharedPreferences.getInstance();
    // Read the token from storage.
    _token = prefs.getString('token');

    // If the token is null or empty, return 'InvalidToken' as a default,
    // but DO NOT write it back to the device storage.
    if (_token == null || _token!.isEmpty) {
      return 'InvalidToken';
    }

    // Otherwise, return the valid token.
    return _token!;
  }
  // Lazy initialization of SharedPreferences
  Future<void> initializePreferences() async {
    prefs ??= await SharedPreferences.getInstance();
  }
  setInitialized(bool init) {
    initialized = init;
    notifyListeners();
  }
  // User getter and setter with notifyListeners
  users? get user => _user;

  void updateCurrentUser(users newUser) {
    _user = newUser;
    notifyListeners();
  }
  bool get isUserLoggedIn =>
      prefs == null ? false : prefs!.getBool("isLoggedIn") ?? false;
  // Initialize size multipliers from SizeConfig
  void initSize() {
    _heightMultiplier = SizeConfig.heightMultiplier;
    _widthMultiplier = SizeConfig.widthMultiplier;
    _textMultiplier = SizeConfig.textMultiplier;
    notifyListeners();
  }
}

final utils = Utils();