/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */
package org.openecomp.sdc.be.model.jsonjanusgraph.operations;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.openecomp.sdc.be.dao.jsongraph.GraphVertex;
import org.openecomp.sdc.be.dao.janusgraph.JanusGraphDao;
import org.openecomp.sdc.be.dao.jsongraph.types.JsonParseFlagEnum;
import org.openecomp.sdc.be.dao.utils.MapUtil;
import org.openecomp.sdc.be.datatypes.elements.PropertyDataDefinition;
import org.openecomp.sdc.be.model.Component;
import org.openecomp.sdc.be.model.PolicyDefinition;
import org.openecomp.sdc.be.model.operations.api.StorageOperationStatus;
import org.openecomp.sdc.be.model.operations.impl.DaoStatusConverter;
import org.openecomp.sdc.common.log.wrappers.Logger;

@org.springframework.stereotype.Component
public class PolicyOperation {

    private static final Logger log = Logger.getLogger(PolicyOperation.class.getName());
    private TopologyTemplateOperation topologyTemplateOperation;
    private JanusGraphDao janusGraphDao;

    public PolicyOperation(TopologyTemplateOperation topologyTemplateOperation, JanusGraphDao janusGraphDao) {
        this.topologyTemplateOperation = topologyTemplateOperation;
        this.janusGraphDao = janusGraphDao;
    }

    /**
     * updates a list of policy properties by overriding the existing ones with the same name
     *
     * @param containerComponent the container of the policy of which its properties are to be updated
     * @param policyId           the id of the policy of which its properties are to be updated
     * @param propertiesToUpdate the policy properties to update
     * @return the update operation status
     */
    public StorageOperationStatus updatePolicyProperties(Component containerComponent, String policyId,
                                                         List<PropertyDataDefinition> propertiesToUpdate) {
        log.debug("#updatePolicyProperties - updating the properties of policy {} in component {}", policyId, containerComponent.getUniqueId());
        PolicyDefinition policy = containerComponent.getPolicyById(policyId);
        return janusGraphDao.getVertexById(containerComponent.getUniqueId(), JsonParseFlagEnum.NoParse)
            .either(containerVertex -> updatePolicyProperties(containerVertex, policy, propertiesToUpdate),
                DaoStatusConverter::convertJanusGraphStatusToStorageStatus);
    }

    private StorageOperationStatus updatePolicyProperties(GraphVertex container, PolicyDefinition policy,
                                                          List<PropertyDataDefinition> propertiesToUpdate) {
        List<PropertyDataDefinition> policyProperties = policy.getProperties();
        List<PropertyDataDefinition> updatedPolicyProperties = updatePolicyProperties(policyProperties, propertiesToUpdate);
        policy.setProperties(updatedPolicyProperties);
        return topologyTemplateOperation.updatePolicyOfToscaElement(container, policy);
    }

    private List<PropertyDataDefinition> updatePolicyProperties(List<PropertyDataDefinition> currentPolicyProperties,
                                                                List<PropertyDataDefinition> toBeUpdatedProperties) {
        Map<String, PropertyDataDefinition> currPropsByName = MapUtil.toMap(currentPolicyProperties, PropertyDataDefinition::getName);
        overrideCurrentPropertiesWithUpdatedProperties(currPropsByName, toBeUpdatedProperties);
        return new ArrayList<>(currPropsByName.values());
    }

    private void overrideCurrentPropertiesWithUpdatedProperties(Map<String, PropertyDataDefinition> currPropsByName,
                                                                List<PropertyDataDefinition> toBeUpdatedProperties) {
        toBeUpdatedProperties.forEach(prop -> currPropsByName.put(prop.getName(), prop));
    }
}