package at.gv.egiz.moazs;

import at.gv.zustellung.app2mzs.xsd.ConfigType;
import at.gv.zustellung.app2mzs.xsd.DeliveryRequestType;
import at.gv.zustellung.app2mzs.xsd.DeliveryRequestType.DeliveryRequestTypeBuilder;
import at.gv.zustellung.app2mzs.xsd.persondata.CorporateBodyType;
import at.gv.zustellung.msg.xsd.SenderProfile;
import org.springframework.stereotype.Component;
import org.springframework.util.Assert;

import static at.gv.egiz.moazs.util.NullCoalesce.coalesce;
import static at.gv.zustellung.app2mzs.xsd.ConfigType.configTypeBuilder;
import static org.springframework.util.Assert.isTrue;
import static org.springframework.util.Assert.notNull;

@Component
public class DeliveryPreprocessor {

    /**
     * Validates and augments an incoming {@code request}
     *
     * Validates a {@code request} to ensure the availability of all mandatory fields. Where possible, the method
     * augments the request with values taken from the app's configuration.
     * @param request
     * @return validated and augmented request
     */
    public DeliveryRequestType preProcess(DeliveryRequestType request) {

        validate(request);

        return new DeliveryRequestTypeBuilder(request)
                .withConfig(coalesce(request.getConfig(), initDefaultConfig()).get())
                .build();
    }

    private void validate(DeliveryRequestType request) {
        validate(request.getSender());

        notNull(request.getReceiver(), "Receiver is missing.");
        notNull(request.getPayload(), "Payloads are missing.");
        notNull(request.getMetaData(), "Metadata is missing.");
        notNull(request.getMetaData().getAppDeliveryID(), "AppDeliveryID is missing.");

    }

    private void validate(DeliveryRequestType.Sender sender) {
        notNull(sender, "Sender is missing.");

        isTrue(sender.getSenderProfile() != null ^ sender.getCorporateBody() != null ,
                "Either SenderProfile or CorporateBody (but not both) need to be defined.");

        if(sender.getSenderProfile() != null)
            validate(sender.getSenderProfile());
        else
            validate(sender.getCorporateBody());
    }

    private void validate(SenderProfile profile) {
        notNull(profile.getProfileID(), "ProfileID is missing.");
    }

    private void validate(CorporateBodyType body) {
        notNull(body.getIdentification(), "Identification is missing.");
        notNull(body.getFullName(), "FullName is missing.");
        isTrue(body.getIdentification().size() > 0, "No Identification provided.");
        isTrue(body.getIdentification().size() <= 1, "Too many means of Identification were provided.");

        var id = body.getIdentification().get(0);
        notNull(id.getType(), "Identification Type is missing");
        notNull(id.getValue(), "Identification Value is missing");
    }

    private ConfigType initDefaultConfig() {
        return configTypeBuilder()
                .withPerformQueryPersonRequest(false)
                .build();
    }

}