import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:shared_preferences/shared_preferences.dart';
import '../../core/network/api_client.dart';
import '../../config/app_config.dart';

class AuthNotifier extends StateNotifier<bool> {
  AuthNotifier() : super(false);

  Future<bool> checkLoginState() async {
    final prefs = await SharedPreferences.getInstance();
    final token = prefs.getString('auth_token');
    if (token != null) {
      state = true;
      return true;
    }
    state = false;
    return false;
  }

  Future<void> login(String username, String password) async {
    final apiClient = ApiClient();
    try {
      final response = await apiClient.client.post(
        AppConfig.loginEndpoint,
        data: {
          'username': username,
          'password': password,
        },
      );
      
      if (response.data is! Map || response.data['data'] is! Map) {
        throw Exception("Format respon server tidak valid (bukan JSON)");
      }
      
      final token = response.data['data']['token'];
      if (token == null) {
        throw Exception("Token otentikasi tidak ditemukan dalam respon");
      }
      
      final prefs = await SharedPreferences.getInstance();
      await prefs.setString('auth_token', token);
      
      state = true;
    } catch (e) {
      state = false;
      rethrow;
    }
  }

  Future<void> logout() async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.remove('auth_token');
    state = false;
  }
}

final authProvider = StateNotifierProvider<AuthNotifier, bool>((ref) {
  return AuthNotifier();
});