import 'package:dartz/dartz.dart';
import '../../../../core/errors/failures.dart';
import '../entities/scan_entity.dart';

/// Abstract repository interface for scanner operations
/// This defines the contract that the data layer must implement
abstract class ScannerRepository {
  /// Save scan data to remote server
  Future<Either<Failure, void>> saveScan({
    required String barcode,
    required String field1,
    required String field2,
    required String field3,
    required String field4,
  });

  /// Get scan history from local storage
  Future<Either<Failure, List<ScanEntity>>> getScanHistory();

  /// Save scan to local storage
  Future<Either<Failure, void>> saveScanLocally(ScanEntity scan);

  /// Delete a scan from local storage
  Future<Either<Failure, void>> deleteScanLocally(String barcode);

  /// Clear all scan history from local storage
  Future<Either<Failure, void>> clearScanHistory();

  /// Get a specific scan by barcode from local storage
  Future<Either<Failure, ScanEntity?>> getScanByBarcode(String barcode);

  /// Update a scan in local storage
  Future<Either<Failure, void>> updateScanLocally(ScanEntity scan);
}