/*
 * Copyright 2022 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.keycloak.models.map.storage.hotRod;

import org.infinispan.client.hotrod.RemoteCache;
import org.keycloak.models.SingleUseObjectValueModel;
import org.keycloak.models.KeycloakSession;
import org.keycloak.models.map.common.AbstractEntity;
import org.keycloak.models.map.common.DeepCloner;
import org.keycloak.models.map.common.StringKeyConverter;
import org.keycloak.models.map.storage.chm.MapModelCriteriaBuilder;
import org.keycloak.models.map.storage.chm.SingleUseObjectKeycloakTransaction;
import org.keycloak.models.map.storage.MapKeycloakTransaction;
import org.keycloak.models.map.storage.QueryParameters;
import org.keycloak.models.map.storage.chm.MapFieldPredicates;
import org.keycloak.models.map.storage.chm.SingleUseObjectModelCriteriaBuilder;
import org.keycloak.models.map.storage.criteria.DefaultModelCriteria;
import org.keycloak.models.map.storage.hotRod.common.AbstractHotRodEntity;
import org.keycloak.models.map.storage.hotRod.common.HotRodEntityDelegate;
import org.keycloak.models.map.storage.hotRod.common.HotRodEntityDescriptor;
import org.keycloak.models.map.storage.hotRod.singleUseObject.HotRodSingleUseObjectEntity;
import org.keycloak.models.map.storage.hotRod.singleUseObject.HotRodSingleUseObjectEntityDelegate;
import org.keycloak.storage.SearchableModelField;

import java.util.Map;
import java.util.stream.Stream;


/**
 * @author <a href="mailto:mkanis@redhat.com">Martin Kanis</a>
 */
public class SingleUseObjectHotRodMapStorage<K, E extends AbstractHotRodEntity, V extends HotRodEntityDelegate<E> & AbstractEntity, M>
        extends HotRodMapStorage<String, HotRodSingleUseObjectEntity, HotRodSingleUseObjectEntityDelegate, SingleUseObjectValueModel> {

    private final StringKeyConverter<String> keyConverter;
    private final HotRodEntityDescriptor<HotRodSingleUseObjectEntity, HotRodSingleUseObjectEntityDelegate> storedEntityDescriptor;
    private final DeepCloner cloner;

    public SingleUseObjectHotRodMapStorage(RemoteCache<String, HotRodSingleUseObjectEntity> remoteCache, StringKeyConverter<String> keyConverter,
                                           HotRodEntityDescriptor<HotRodSingleUseObjectEntity, HotRodSingleUseObjectEntityDelegate> storedEntityDescriptor,
                                           DeepCloner cloner) {
        super(remoteCache, keyConverter, storedEntityDescriptor, cloner);
        this.keyConverter = keyConverter;
        this.storedEntityDescriptor = storedEntityDescriptor;
        this.cloner = cloner;
    }

    @Override
    protected MapKeycloakTransaction<HotRodSingleUseObjectEntityDelegate, SingleUseObjectValueModel> createTransactionInternal(KeycloakSession session) {
        Map<SearchableModelField<? super SingleUseObjectValueModel>, MapModelCriteriaBuilder.UpdatePredicatesFunc<K, HotRodSingleUseObjectEntityDelegate, SingleUseObjectValueModel>> fieldPredicates =
                MapFieldPredicates.getPredicates((Class<SingleUseObjectValueModel>) storedEntityDescriptor.getModelTypeClass());
       return new SingleUseObjectKeycloakTransaction(this, keyConverter, cloner, fieldPredicates);
    }

    @Override
    public HotRodSingleUseObjectEntityDelegate create(HotRodSingleUseObjectEntityDelegate value) {
        if (value.getId() == null) {
            if (value.getObjectKey() != null) {
                value.setId(value.getObjectKey());
            }
        }
        return super.create(value);
    }

    @Override
    public Stream<HotRodSingleUseObjectEntityDelegate> read(QueryParameters<SingleUseObjectValueModel> queryParameters) {
        DefaultModelCriteria<SingleUseObjectValueModel> criteria = queryParameters.getModelCriteriaBuilder();

        if (criteria == null) {
            return Stream.empty();
        }

        SingleUseObjectModelCriteriaBuilder mcb = criteria.flashToModelCriteriaBuilder(createSingleUseObjectCriteriaBuilder());
        if (mcb.isValid()) {
            HotRodSingleUseObjectEntityDelegate value = read(mcb.getKey());
            return value != null ? Stream.of(value) : Stream.empty();
        }

        return super.read(queryParameters);
    }

    private SingleUseObjectModelCriteriaBuilder createSingleUseObjectCriteriaBuilder() {
        return new SingleUseObjectModelCriteriaBuilder();
    }

}
