FabledApp/lib/providers/auth_provider.dart

import 'package:flutter_riverpod/flutter_riverpod.dart';

import 'api_client_provider.dart';

enum AuthStatus { unknown, authenticated, unauthenticated }

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

class AuthNotifier extends StateNotifier<AuthStatus> {
  final Ref _ref;

  AuthNotifier(this._ref) : super(AuthStatus.unknown);

  Future<void> verify() async {
    try {
      final repo = _ref.read(authRepositoryProvider);
      final ok = await repo.verify();
      state = ok ? AuthStatus.authenticated : AuthStatus.unauthenticated;
    } catch (_) {
      state = AuthStatus.unauthenticated;
    }
  }

  Future<void> login(String username, String password) async {
    final repo = _ref.read(authRepositoryProvider);
    await repo.login(username, password);
    state = AuthStatus.authenticated;
  }

  Future<void> logout() async {
    try {
      final repo = _ref.read(authRepositoryProvider);
      await repo.logout();
    } finally {
      state = AuthStatus.unauthenticated;
    }
  }
}