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/*-
 * ============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.vendorlicense.dao.impl.zusammen;

import static org.openecomp.core.zusammen.api.ZusammenUtil.buildElement;
import static org.openecomp.core.zusammen.api.ZusammenUtil.buildStructuralElement;
import static org.openecomp.core.zusammen.api.ZusammenUtil.createSessionContext;

import com.amdocs.zusammen.adaptor.inbound.api.types.item.Element;
import com.amdocs.zusammen.adaptor.inbound.api.types.item.ElementInfo;
import com.amdocs.zusammen.adaptor.inbound.api.types.item.ZusammenElement;
import com.amdocs.zusammen.datatypes.Id;
import com.amdocs.zusammen.datatypes.SessionContext;
import com.amdocs.zusammen.datatypes.item.Action;
import com.amdocs.zusammen.datatypes.item.ElementContext;
import com.amdocs.zusammen.datatypes.item.Info;
import com.amdocs.zusammen.datatypes.item.Relation;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import org.openecomp.core.zusammen.api.ZusammenAdaptor;
import org.openecomp.sdc.datatypes.model.ElementType;
import org.openecomp.sdc.vendorlicense.dao.FeatureGroupDao;
import org.openecomp.sdc.vendorlicense.dao.impl.zusammen.convertor.ElementToFeatureGroupConvertor;
import org.openecomp.sdc.vendorlicense.dao.types.FeatureGroupEntity;
import org.openecomp.types.ElementPropertyName;

public class FeatureGroupDaoZusammenImpl implements FeatureGroupDao {

    private ZusammenAdaptor zusammenAdaptor;

    public FeatureGroupDaoZusammenImpl(ZusammenAdaptor zusammenAdaptor) {
        this.zusammenAdaptor = zusammenAdaptor;
    }

    @Override
    public void registerVersioning(String versionableEntityType) {
        //no need
    }

    @Override
    public void create(FeatureGroupEntity featureGroup) {
        ZusammenElement featureGroupElement = buildFeatureGroupElement(featureGroup, Action.CREATE);
        ZusammenElement featureGroupsElement = buildStructuralElement(ElementType.FeatureGroups, Action.IGNORE);
        featureGroupsElement.addSubElement(featureGroupElement);
        SessionContext context = createSessionContext();
        Element featureGroupsSavedElement = zusammenAdaptor
            .saveElement(context, new ElementContext(featureGroup.getVendorLicenseModelId(), featureGroup.getVersion().getId()), featureGroupsElement,
                "Create feature group");
        featureGroup.setId(featureGroupsSavedElement.getSubElements().iterator().next().getElementId().getValue());
    }

    @Override
    public void update(FeatureGroupEntity featureGroup) {
        ZusammenElement featureGroupElement = buildFeatureGroupElement(featureGroup, Action.UPDATE);
        SessionContext context = createSessionContext();
        zusammenAdaptor
            .saveElement(context, new ElementContext(featureGroup.getVendorLicenseModelId(), featureGroup.getVersion().getId()), featureGroupElement,
                String.format("Update feature group with id %s", featureGroup.getId()));
    }

    @Override
    public FeatureGroupEntity get(FeatureGroupEntity featureGroup) {
        SessionContext context = createSessionContext();
        ElementContext elementContext = new ElementContext(featureGroup.getVendorLicenseModelId(), featureGroup.getVersion().getId());
        return zusammenAdaptor.getElementInfo(context, elementContext, new Id(featureGroup.getId())).map(elementInfo -> {
            FeatureGroupEntity entity = new ElementToFeatureGroupConvertor().convert(elementInfo);
            entity.setVendorLicenseModelId(featureGroup.getVendorLicenseModelId());
            entity.setVersion(featureGroup.getVersion());
            return entity;
        }).orElse(null);
    }

    @Override
    public void delete(FeatureGroupEntity featureGroup) {
        ZusammenElement zusammenElement = buildElement(new Id(featureGroup.getId()), Action.DELETE);
        SessionContext context = createSessionContext();
        ElementContext elementContext = new ElementContext(featureGroup.getVendorLicenseModelId(), featureGroup.getVersion().getId());
        zusammenAdaptor.saveElement(context, elementContext, zusammenElement, "delete feature group. id:" + featureGroup.getId() + ".");
    }

    @Override
    public Collection<FeatureGroupEntity> list(FeatureGroupEntity featureGroup) {
        SessionContext context = createSessionContext();
        ElementContext elementContext = new ElementContext(featureGroup.getVendorLicenseModelId(), featureGroup.getVersion().getId());
        ElementToFeatureGroupConvertor convertor = new ElementToFeatureGroupConvertor();
        return zusammenAdaptor.listElementsByName(context, elementContext, null, ElementType.FeatureGroups.name()).stream().map(elementInfo -> {
            FeatureGroupEntity entity = convertor.convert(elementInfo);
            entity.setVendorLicenseModelId(featureGroup.getVendorLicenseModelId());
            entity.setVersion(featureGroup.getVersion());
            return entity;
        }).collect(Collectors.toList());
    }

    @Override
    public long count(FeatureGroupEntity featureGroup) {
        SessionContext context = createSessionContext();
        ElementContext elementContext = new ElementContext(featureGroup.getVendorLicenseModelId(), featureGroup.getVersion().getId());
        return zusammenAdaptor.listElementsByName(context, elementContext, null, ElementType.FeatureGroups.name()).size();
    }

    @Override
    public void removeEntitlementPool(FeatureGroupEntity featureGroup, String entitlementPoolId) {
        removeRelationToContainedEntity(featureGroup, entitlementPoolId, "entitlement pool");
    }

    @Override
    public void removeLicenseKeyGroup(FeatureGroupEntity featureGroup, String licenseKeyGroupId) {
        removeRelationToContainedEntity(featureGroup, licenseKeyGroupId, "license Key Group");
    }

    private void removeRelationToContainedEntity(FeatureGroupEntity featureGroup, String containedEntityId, String containedEntityType) {
        SessionContext context = createSessionContext();
        ElementContext elementContext = new ElementContext(featureGroup.getVendorLicenseModelId(), featureGroup.getVersion().getId());
        Optional<ElementInfo> elementInfo = zusammenAdaptor.getElementInfo(context, elementContext, new Id(featureGroup.getId()));
        if (elementInfo.isPresent()) {
            ZusammenElement zusammenElement = VlmZusammenUtil.getZusammenElement(elementInfo.get());
            zusammenElement.setAction(Action.UPDATE);
            zusammenElement.setRelations(
                elementInfo.get().getRelations().stream().filter(relation -> !containedEntityId.equals(relation.getEdge2().getElementId().getValue()))
                    .collect(Collectors.toList()));
            zusammenAdaptor.saveElement(context, elementContext, zusammenElement, String.format("remove %s", containedEntityType));
        }
    }

    @Override
    public void updateFeatureGroup(FeatureGroupEntity featureGroup, Set<String> addedEntitlementPools, Set<String> removedEntitlementPools,
                                   Set<String> addedLicenseKeyGroups, Set<String> removedLicenseKeyGroups) {
        ZusammenElement featureGroupElement = buildFeatureGroupElement(featureGroup, Action.UPDATE);
        SessionContext context = createSessionContext();
        ElementContext elementContext = new ElementContext(featureGroup.getVendorLicenseModelId(), featureGroup.getVersion().getId());
        ElementToFeatureGroupConvertor convertor = new ElementToFeatureGroupConvertor();
        Optional<ElementInfo> elementInfo = zusammenAdaptor.getElementInfo(context, elementContext, new Id(featureGroup.getId()));
        if (elementInfo.isPresent()) {
            FeatureGroupEntity currentFeatureGroup = convertor.convert(elementInfo.get());
            currentFeatureGroup.setVendorLicenseModelId(featureGroup.getVendorLicenseModelId());
            currentFeatureGroup.setVersion(featureGroup.getVersion());
            if (!(removedEntitlementPools == null)) {
                currentFeatureGroup.getEntitlementPoolIds().removeAll(removedEntitlementPools);
            }
            if (!(addedEntitlementPools == null)) {
                currentFeatureGroup.getEntitlementPoolIds().addAll(addedEntitlementPools);
            }
            if (featureGroupElement.getRelations() == null) {
                featureGroupElement.setRelations(new ArrayList<>());
            }
            featureGroupElement.getRelations().addAll(currentFeatureGroup.getEntitlementPoolIds().stream()
                .map(relation -> VlmZusammenUtil.createRelation(RelationType.FeatureGroupToEntitlmentPool, relation)).collect(Collectors.toList()));
            if (!(removedLicenseKeyGroups == null)) {
                currentFeatureGroup.getLicenseKeyGroupIds().removeAll(removedLicenseKeyGroups);
            }
            if (!(addedLicenseKeyGroups == null)) {
                currentFeatureGroup.getLicenseKeyGroupIds().addAll(addedLicenseKeyGroups);
            }
            featureGroupElement.getRelations().addAll(currentFeatureGroup.getLicenseKeyGroupIds().stream()
                .map(relation -> VlmZusammenUtil.createRelation(RelationType.FeatureGroupToLicenseKeyGroup, relation)).collect(Collectors.toList()));
            Collection<Relation> laRelations = elementInfo.get().getRelations().stream()
                .filter(rel -> rel.getType().equals(RelationType.FeatureGroupToReferencingLicenseAgreement.name())).map(rel -> VlmZusammenUtil
                    .createRelation(RelationType.FeatureGroupToReferencingLicenseAgreement, rel.getEdge2().getElementId().toString()))
                .collect(Collectors.toList());
            featureGroupElement.getRelations().addAll(laRelations);
            zusammenAdaptor.saveElement(context, elementContext, featureGroupElement, "update feature group");
        }
    }

    @Override
    public void deleteAll(FeatureGroupEntity featureGroup) {
        //not supported
    }

    @Override
    public void addReferencingLicenseAgreement(FeatureGroupEntity featureGroup, String licenseAgreementId) {
        SessionContext context = createSessionContext();
        ElementContext elementContext = new ElementContext(featureGroup.getVendorLicenseModelId(), featureGroup.getVersion().getId());
        Optional<ElementInfo> elementInfo = zusammenAdaptor.getElementInfo(context, elementContext, new Id(featureGroup.getId()));
        if (elementInfo.isPresent()) {
            ZusammenElement zusammenElement = VlmZusammenUtil.getZusammenElement(elementInfo.get());
            zusammenElement.setAction(Action.UPDATE);
            zusammenElement.getRelations()
                .add(VlmZusammenUtil.createRelation(RelationType.FeatureGroupToReferencingLicenseAgreement, licenseAgreementId));
            zusammenAdaptor.saveElement(context, elementContext, zusammenElement, "add referencing license agreement");
        }
    }

    @Override
    public void removeReferencingLicenseAgreement(FeatureGroupEntity featureGroup, String licenseAgreementId) {
        SessionContext context = createSessionContext();
        ElementContext elementContext = new ElementContext(featureGroup.getVendorLicenseModelId(), featureGroup.getVersion().getId());
        Optional<ElementInfo> elementInfo = zusammenAdaptor.getElementInfo(context, elementContext, new Id(featureGroup.getId()));
        if (elementInfo.isPresent()) {
            ZusammenElement zusammenElement = VlmZusammenUtil.getZusammenElement(elementInfo.get());
            zusammenElement.setAction(Action.UPDATE);
            zusammenElement.setRelations(elementInfo.get().getRelations().stream()
                .filter(relation -> !licenseAgreementId.equals(relation.getEdge2().getElementId().getValue())).collect(Collectors.toList()));
            zusammenAdaptor.saveElement(context, elementContext, zusammenElement, "remove referencing license agreement");
        }
    }

    private ZusammenElement buildFeatureGroupElement(FeatureGroupEntity featureGroup, Action action) {
        ZusammenElement featureGroupElement = buildElement(featureGroup.getId() == null ? null : new Id(featureGroup.getId()), action);
        Info info = new Info();
        info.setName(featureGroup.getName());
        info.setDescription(featureGroup.getDescription());
        info.addProperty(ElementPropertyName.elementType.name(), ElementType.FeatureGroup);
        info.addProperty("partNumber", featureGroup.getPartNumber());
        featureGroupElement.setInfo(info);
        featureGroupElement.setRelations(new ArrayList<>());
        if (featureGroup.getEntitlementPoolIds() != null && !featureGroup.getEntitlementPoolIds().isEmpty()) {
            featureGroupElement.getRelations().addAll(featureGroup.getEntitlementPoolIds().stream()
                .map(rel -> VlmZusammenUtil.createRelation(RelationType.FeatureGroupToEntitlmentPool, rel)).collect(Collectors.toList()));
        }
        if (featureGroup.getLicenseKeyGroupIds() != null && !featureGroup.getLicenseKeyGroupIds().isEmpty()) {
            featureGroupElement.getRelations().addAll(featureGroup.getLicenseKeyGroupIds().stream()
                .map(rel -> VlmZusammenUtil.createRelation(RelationType.FeatureGroupToLicenseKeyGroup, rel)).collect(Collectors.toList()));
        }
        if (featureGroup.getReferencingLicenseAgreements() != null && !featureGroup.getReferencingLicenseAgreements().isEmpty()) {
            featureGroupElement.getRelations().addAll(featureGroup.getReferencingLicenseAgreements().stream()
                .map(rel -> VlmZusammenUtil.createRelation(RelationType.FeatureGroupToReferencingLicenseAgreement, rel))
                .collect(Collectors.toList()));
        }
        return featureGroupElement;
    }
}