/*-
 * ============LICENSE_START=======================================================
 * openECOMP : SDN-C
 * ================================================================================
 * 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.sdnc.rm.util;

import java.util.ArrayList;
import java.util.Date;

import org.openecomp.sdnc.rm.data.AllocationItem;
import org.openecomp.sdnc.rm.data.LabelAllocationItem;
import org.openecomp.sdnc.rm.data.LabelAllocationRequest;
import org.openecomp.sdnc.rm.data.LabelResource;
import org.openecomp.sdnc.rm.data.ResourceKey;
import org.openecomp.sdnc.rm.data.ResourceType;

public class LabelUtil {

	public static boolean checkLabel(LabelResource l, LabelAllocationRequest req) {
		if (req.check && req.label != null && l.allocationItems != null && !l.allocationItems.isEmpty()) {
			for (AllocationItem ai : l.allocationItems) {
				LabelAllocationItem lai = (LabelAllocationItem) ai;
				if (!eq(req.resourceUnionId, lai.resourceUnionId) && !eq(req.label, lai.label))
					return false;
			}
		}
		return true;
	}

	public static String allocateLabel(LabelResource l, LabelAllocationRequest req, String applicationId) {
		if (!req.allocate)
			return null;

		LabelAllocationItem lai = (LabelAllocationItem) ResourceUtil.getAllocationItem(l, req.resourceSetId);
		if (lai == null) {
			lai = new LabelAllocationItem();
			lai.resourceType = ResourceType.Label;
			lai.resourceKey = new ResourceKey();
			lai.resourceKey.assetId = req.assetId;
			lai.resourceKey.resourceName = req.resourceName;
			lai.applicationId = applicationId;
			lai.resourceSetId = req.resourceSetId;
			lai.resourceUnionId = req.resourceUnionId;
			lai.resourceShareGroupList = req.resourceShareGroupList;

			if (l.allocationItems == null)
				l.allocationItems = new ArrayList<AllocationItem>();
			l.allocationItems.add(lai);
		}

		lai.label = req.label;
		lai.allocationTime = new Date();

		recalculate(l);

		return lai.label;
	}

	public static void recalculate(LabelResource l) {
		l.label = null;
		l.referenceCount = 0;
		if (l.allocationItems != null)
			for (AllocationItem ai : l.allocationItems) {
				LabelAllocationItem lai = (LabelAllocationItem) ai;
				if (lai.label != null) {
					l.referenceCount++;
					if (l.label == null)
						l.label = lai.label;
					else if (!l.label.equals(lai.label))
						l.label = "__BLOCKED__";
				}
			}
	}

	private static boolean eq(Object o1, Object o2) {
		return o1 == null ? o2 == null : o1.equals(o2);
	}
}