abstract class Failure {
  final String message;
  final String? code;

  const Failure({required this.message, this.code});

  @override
  String toString() => 'Failure(message: $message, code: $code)';
}

class ServerFailure extends Failure {
  const ServerFailure({required super.message, super.code});
}

class NetworkFailure extends Failure {
  const NetworkFailure({super.message = 'Network connection error', super.code});
}

class ValidationFailure extends Failure {
  const ValidationFailure({required super.message, super.code});
}

class NotFoundFailure extends Failure {
  const NotFoundFailure({super.message = 'Resource not found', super.code});
}

class UnexpectedFailure extends Failure {
  const UnexpectedFailure({super.message = 'An unexpected error occurred', super.code});
}