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/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 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 fj.data.Either;
import org.openecomp.sdc.be.dao.janusgraph.JanusGraphOperationStatus;
import org.openecomp.sdc.be.dao.jsongraph.GraphVertex;
import org.openecomp.sdc.be.dao.jsongraph.types.EdgeLabelEnum;
import org.openecomp.sdc.be.dao.jsongraph.types.JsonParseFlagEnum;
import org.openecomp.sdc.be.dao.jsongraph.types.VertexTypeEnum;
import org.openecomp.sdc.be.datatypes.enums.GraphPropertyEnum;
import org.openecomp.sdc.be.model.operations.api.StorageOperationStatus;
import org.openecomp.sdc.be.model.operations.impl.DaoStatusConverter;
import org.openecomp.sdc.be.model.operations.impl.UniqueIdBuilder;
import org.openecomp.sdc.common.log.wrappers.Logger;
import org.openecomp.sdc.common.util.ValidationUtils;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

@org.springframework.stereotype.Component("category-operation")
public class CategoryOperation extends BaseOperation{

    private static final Logger log = Logger.getLogger(CategoryOperation.class.getName());

    /**
     *
     * @param name
     * @param type
     * @return
     */
    public  Either<GraphVertex, StorageOperationStatus> getCategory(String name, VertexTypeEnum type) {
        if (name != null) {
            String categoryUid = UniqueIdBuilder.buildComponentCategoryUid(name, type);
            Map<GraphPropertyEnum, Object> props = new HashMap<>();
            props.put(GraphPropertyEnum.NORMALIZED_NAME, ValidationUtils.normalizeCategoryName4Uniqueness(name));
            Either<List<GraphVertex>, JanusGraphOperationStatus> either = janusGraphDao
                .getByCriteria(type, props);

            if (either.isRight()) {
                JanusGraphOperationStatus janusGraphOperationStatus = either.right().value();
                log.debug("Problem while geting category with id {}. reason - {}", categoryUid, janusGraphOperationStatus
                    .name());
                if (janusGraphOperationStatus == JanusGraphOperationStatus.NOT_FOUND) {
                    return Either.right(StorageOperationStatus.CATEGORY_NOT_FOUND);
                } else {
                    return Either.right(StorageOperationStatus.GENERAL_ERROR);
                }
            }
            return Either.left(either.left().value().get(0));
        } else {
            return Either.right(StorageOperationStatus.GENERAL_ERROR);
        }
    }
    /**
     *
     * @param categoryV
     * @param name
     * @return
     */
    public  Either<GraphVertex, StorageOperationStatus> getSubCategoryForCategory(GraphVertex categoryV, String name ) {
        Either<List<GraphVertex>, JanusGraphOperationStatus> childrenVertecies = janusGraphDao
            .getChildrenVertecies(categoryV, EdgeLabelEnum.SUB_CATEGORY, JsonParseFlagEnum.NoParse);
        if ( childrenVertecies.isRight() ){
            log.debug("Failed to fetch children verticies for category {} error {}", categoryV.getUniqueId(), childrenVertecies.right().value());
            return Either.right(DaoStatusConverter.convertJanusGraphStatusToStorageStatus(childrenVertecies.right().value()));
        }
        for ( GraphVertex childV : childrenVertecies.left().value() ){
            if ( childV.getMetadataProperty(GraphPropertyEnum.NAME).equals(name) ){
                return Either.left(childV);
            }
        }
        return Either.right(StorageOperationStatus.NOT_FOUND);
    }
}