/**
 * ============LICENSE_START=======================================================
 * org.onap.aai
 * ================================================================================
 * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
 * Copyright © 2017-2018 European Software Marketing Ltd.
 * ================================================================================
 * 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.onap.aai.modelloader.notification;

import java.util.List;
import java.util.Objects;
import org.onap.aai.babel.service.data.BabelArtifact;
import org.onap.aai.modelloader.entity.Artifact;
import org.onap.aai.modelloader.entity.catalog.VnfCatalogArtifact;
import org.onap.aai.modelloader.entity.model.BabelArtifactParsingException;
import org.onap.aai.modelloader.entity.model.ModelArtifact;
import org.onap.aai.modelloader.entity.model.ModelArtifactParser;
import org.springframework.stereotype.Component;

/**
 * This class is responsible for converting TOSCA artifacts into instances of {@link ModelArtifact} ready for pushing
 * the converted artifacts .
 */
@Component
public class BabelArtifactConverter {

    private final ModelArtifactParser modelArtifactParser;

    public BabelArtifactConverter(ModelArtifactParser modelArtifactParser) {
        this.modelArtifactParser = modelArtifactParser;
    }

    /**
     * This method converts BabelArtifacts into instances of {@link ModelArtifact}.
     *
     * @param xmlArtifacts xml artifacts to be parsed
     * @return List<org.openecomp.modelloader.entity.Artifact> list of converted model artifacts
     * @throws BabelArtifactParsingException if an error occurs trying to parse the generated XML files that were
     *         converted from tosca artifacts
     */
    public List<Artifact> convertToModel(BabelArtifact babelArtifact) throws BabelArtifactParsingException {
        Objects.requireNonNull(babelArtifact);
        List<Artifact> parsedArtifacts = modelArtifactParser.parse(babelArtifact.getPayload(), babelArtifact.getName());
        
        if (parsedArtifacts == null || parsedArtifacts.isEmpty()) {
            throw new BabelArtifactParsingException("Could not parse generated XML: " + babelArtifact.getPayload());
        }

        return parsedArtifacts;
    }

    /**
     * This method converts BabelArtifacts into instances of {@link VnfCatalogArtifact}.
     *
     * @param xmlArtifacts xml artifacts to be parsed
     * @return List<org.openecomp.modelloader.entity.Artifact> list of converted catalog artifacts
     */
    public Artifact convertToCatalog(BabelArtifact babelArtifact) {
        return new VnfCatalogArtifact(babelArtifact.getPayload());
    }
}