import '../../models/user_model.dart';
import '../interfaces/user_service.dart';
import 'api_client.dart';

/// Real API implementation.
/// NOTE: The backend has no list-users endpoint, so [getUsers] returns only
/// users created during the current session (stored in memory).
class UserApiService implements UserService {
  final ApiClient _client;
  final List<UserModel> _sessionUsers = [];

  UserApiService(this._client);

  @override
  Future<List<UserModel>> getUsers() async {
    return List.unmodifiable(_sessionUsers);
  }

  @override
  Future<CreateUserResult> createUser(String username, UserRole role) async {
    final data = await _client.post('/admin/users', {
      'username': username,
      'role': role.apiValue,
    });
    final user = UserModel.fromJson(data['user'] as Map<String, dynamic>);
    final secret = data['secret'] as String;
    _sessionUsers.add(user);
    return (user: user, secret: secret);
  }

  @override
  Future<String> resetSecret(String userId) async {
    final data = await _client.post(
      '/admin/users/$userId/reset-secret',
      {},
    );
    return data['secret'] as String;
  }
}