package at.gv.egiz.moazs.verify;

import at.gv.egiz.moazs.MoaZSException;
import at.gv.egiz.moazs.repository.BinaryRepository;
import at.gv.egiz.moazs.repository.DeliveryRepository;
import at.gv.egiz.moazs.scheme.MsgResponse;
import at.gv.egiz.moazs.service.MsgService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import static at.gv.egiz.moazs.MoaZSException.moaZSExceptionBuilder;
import static java.lang.String.format;

@Component
public class MsgResponseVerifier {

    private static final Logger log = LoggerFactory.getLogger(MsgService.class);
    public static final String MOASP_SIGNATURE_INVALID_ERROR_MSG = "Signature of Msg Response " +
            "with AppDeliveryID=%s is not valid.";

    private final DeliveryRepository repo;
    private final BinaryRepository binaryRepo;
    private final SignatureVerifier verifier;

    @Autowired
    public MsgResponseVerifier(DeliveryRepository repo,
                               BinaryRepository binaryStatusRepository,
                               SignatureVerifier verifier) {
        this.repo = repo;
        this.binaryRepo = binaryStatusRepository;
        this.verifier = verifier;
    }

    public MsgResponse verify(String id) {

        var response = repo.getResponse(id).get();
        var builder = moaZSExceptionBuilder().withAllParametersInAnswer(response.getAnswer());

        var binaryResponse = binaryRepo.get(id).get();

        try {
            verifier.verify(binaryResponse);
            return response;
        } catch (MoaZSException ex) {
            log.error(ex.getMessage(), ex);
            var wrappingEx = builder
                    .withMessage(format(MOASP_SIGNATURE_INVALID_ERROR_MSG, response.getAppDeliveryID()))
                    .withErrorCode(MoaZSException.ERROR_MOASP_SIGNATURE_INVALID)
                    .withCause(ex)
                    .build();

            return response.generateError(wrappingEx);
        }

    }

}