package at.gv.egiz.moazs.preprocess;

import at.gv.zustellung.app2mzs.xsd.ConfigType;
import at.gv.zustellung.app2mzs.xsd.DeliveryRequestType;
import at.gv.zustellung.app2mzs.xsd.DeliveryRequestType.DeliveryRequestTypeBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Map;

import static at.gv.egiz.moazs.util.NullCoalesce.coalesce;

@Component
public class DeliveryRequestAugmenter {

    private final ConfigProfileMerger merger;
    private final Map<String, ConfigType> configs;

    @Autowired
    public DeliveryRequestAugmenter(Map<String, ConfigType> deliveryRequestConfigs, ConfigProfileMerger merger) {
        this.configs = deliveryRequestConfigs;
        this.merger = merger;
    }

    /**
     * Augments an incoming {@code request} by filling gaps with config- or default parameters.
     *
     * @param request
     * @return augmented request
     */
    public DeliveryRequestType augment(DeliveryRequestType request) {

        var requestConfig = request.getConfig();

        var fallbackConfig = determineProfileFromProfileId(requestConfig);

        var config = merger.merge(requestConfig, fallbackConfig);

        return new DeliveryRequestTypeBuilder(request)
                .withConfig(config)
                .build();
    }

    private ConfigType determineProfileFromProfileId(ConfigType requestConfig) {

        if (requestConfig == null || requestConfig.getProfileID() == null) {
            return configs.get("default");
        }

        var id = requestConfig.getProfileID();

        return coalesce(configs.get(id), configs.get("default")).get();
    }

}