flutter_app_android/lib/presentation/providers/user_provider.dart

import 'package:flutter/material.dart';
import '../../data/models/user.dart';
import '../../data/repositories/user_repository.dart';

class UserProvider with ChangeNotifier {
  final UserRepository userRepository;
  
  User? _user;
  bool _isLoading = false;
  String? _error;
  
  UserProvider({required this.userRepository});
  
  User? get user => _user;
  bool get isLoading => _isLoading;
  String? get error => _error;
  
  Future<void> loadUserProfile() async {
    _isLoading = true;
    _error = null;
    notifyListeners();
    
    try {
      final response = await userRepository.getUserProfile();
      if (response.success && response.data != null) {
        _user = response.data;
      } else {
        _error = response.message;
      }
    } catch (e) {
      _error = '加载失败: $e';
    } finally {
      _isLoading = false;
      notifyListeners();
    }
  }
  
  Future<void> updateUserProfile(User user) async {
    _isLoading = true;
    _error = null;
    notifyListeners();
    
    try {
      final response = await userRepository.updateUserProfile(user);
      if (response.success && response.data != null) {
        _user = response.data;
      } else {
        _error = response.message;
      }
    } catch (e) {
      _error = '更新失败: $e';
    } finally {
      _isLoading = false;
      notifyListeners();
    }
  }
  
  void clearError() {
    _error = null;
    notifyListeners();
  }
}