import 'package:flutter/foundation.dart';
import '../models/user.dart';
import '../services/auth_service.dart';

class UserProvider extends ChangeNotifier {
  final AuthService _authService = AuthService();
  User? _user;
  bool _isLoading = false;

  User? get user => _user;
  bool get isLoggedIn => _user != null;
  bool get isLoading => _isLoading;

  UserProvider() {
    _loadSavedUser();
  }

  Future<void> _loadSavedUser() async {
    _isLoading = true;
    notifyListeners();

    try {
      _user = await _authService.getSavedUser();
    } catch (e) {
      print('Fehler beim Laden des Benutzers: $e');
    } finally {
      _isLoading = false;
      notifyListeners();
    }
  }

  Future<bool> login(String username, String password) async {
    _isLoading = true;
    notifyListeners();

    try {
      final user = await _authService.login(username, password);
      if (user != null) {
        _user = user;
        _isLoading = false;
        notifyListeners();
        return true;
      }
    } catch (e) {
      print('Login-Fehler: $e');
    }

    _isLoading = false;
    notifyListeners();
    return false;
  }

  Future<void> logout() async {
    await _authService.logout();
    _user = null;
    notifyListeners();
  }

  Future<void> refreshUser() async {
    await _loadSavedUser();
  }
}