/*-
 * ============LICENSE_START=======================================================
 * org.openecomp.aai
 * ================================================================================
 * 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.aai.introspection.sideeffect;

import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Collections;
import java.util.List;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.Optional;

import javax.ws.rs.core.MultivaluedMap;

import org.apache.tinkerpop.gremlin.structure.Vertex;

import org.openecomp.aai.exceptions.AAIException;
import org.openecomp.aai.introspection.Introspector;
import org.openecomp.aai.introspection.sideeffect.exceptions.AAIMissingRequiredPropertyException;
import org.openecomp.aai.introspection.sideeffect.exceptions.AAIMultiplePropertiesException;
import org.openecomp.aai.parsers.query.QueryParser;
import org.openecomp.aai.restcore.util.URITools;
import org.openecomp.aai.schema.enums.PropertyMetadata;
import org.openecomp.aai.serialization.db.DBSerializer;
import org.openecomp.aai.serialization.engines.TransactionalGraphEngine;


public class DataCopy extends SideEffect {

	
	public DataCopy(Introspector obj, Vertex self, TransactionalGraphEngine dbEngine, DBSerializer serializer) {
		super(obj, self, dbEngine, serializer);
	}
	
	@Override
	protected void processURI(Optional<String> completeUri, Entry<String, String> entry) throws URISyntaxException, UnsupportedEncodingException, AAIException {
		if (completeUri.isPresent()) {
			URI uri = new URI(completeUri.get());
			MultivaluedMap<String, String> map = URITools.getQueryMap(uri);
			QueryParser uriQuery = dbEngine.getQueryBuilder(this.latestLoader).createQueryFromURI(uri, map);
			List<Vertex> results = uriQuery.getQueryBuilder().toList();
			Introspector resultObj = this.latestLoader.introspectorFromName(uriQuery.getResultType());
			if (results.size() == 1) {
				serializer.dbToObject(Collections.singletonList(results.get(0)), resultObj, 0, true, "false");
				try {
					obj.setValue(entry.getKey(), Objects.requireNonNull(resultObj.getValue(uri.getFragment()), uri.getFragment() + " was null"));
				} catch (NullPointerException e) {
					throw new AAIMissingRequiredPropertyException("property " + uri.getFragment() + " not found at " + uri);
				}
 			} else {
				if (results.isEmpty()) {
					throw new AAIException("AAI_6114", "object located at " + uri + " not found");
				} else if (results.size() > 1) {
					throw new AAIMultiplePropertiesException("multiple values of " + entry.getKey() + " found when searching " + uri);
				}
			}
		} else {
			//skip processing because no required properties were specified
		}
	}

	@Override
	protected PropertyMetadata getPropertyMetadata() {
		return PropertyMetadata.DATA_COPY;
	}

	@Override
	protected boolean replaceWithWildcard() {
		return false;
	}
	
}