/*-
 * ============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.ra.check;

import java.util.Map;

import org.openecomp.sdnc.ra.comp.EquipmentCheck;
import org.openecomp.sdnc.ra.comp.ServiceData;
import org.openecomp.sdnc.ra.equip.data.EquipmentData;
import org.openecomp.sdnc.rm.comp.ResourceManager;
import org.openecomp.sdnc.rm.data.AllocationItem;
import org.openecomp.sdnc.rm.data.Resource;
import org.openecomp.sdnc.util.vrf.VpnParam;
import org.openecomp.sdnc.util.vrf.VrfUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class HubWithRgCheck implements EquipmentCheck {

	private static final Logger log = LoggerFactory.getLogger(HubWithRgCheck.class);

	private ResourceManager resourceManager;

	@Override
	public boolean checkEquipment(
	        String endPointPosition,
	        ServiceData serviceData,
	        EquipmentData equipData,
	        Map<String, Object> equipmentConstraints) {
		String vrfName = (String) serviceData.data.get("vrf-name");
		if (vrfName == null)
			return true;

		// Check if this is HUB. If not, this check is not applicable
		VpnParam vpnp = VrfUtil.parseVrfInstanceName(vrfName);
		if (vpnp.siteType == null || !vpnp.siteType.equals("HUB"))
			return true;

		boolean rgPresent = vpnp.routeGroupName != null;

		// First check if a new VRF would be required. If not, we are good
		Resource r = resourceManager.getResource("VRF", equipData.equipmentId);
		if (r != null && r.allocationItems != null) {
			for (AllocationItem ai : r.allocationItems)
				if (ai.resourceShareGroupList.contains(vrfName))
					return true;

			String resourceUnionId = serviceData.serviceInstanceId + '/' + serviceData.endPointPosition;

			// Check if there is already another HUB VRF with RG presence that does not match the requested
			for (AllocationItem ai : r.allocationItems) {

				// Skip the allocation item for the current service instance, if there, in case it is a change order
				if (ai.resourceUnionId.equals(resourceUnionId))
					continue;

				if (ai.resourceShareGroupList != null && ai.resourceShareGroupList.size() > 0) {
					String vrfName2 = ai.resourceShareGroupList.iterator().next();
					VpnParam vpnp2 = VrfUtil.parseVrfInstanceName(vrfName2);

					if (vpnp2.siteType == null || !vpnp2.siteType.equals("HUB"))
						continue;

					boolean rgPresent2 = vpnp2.routeGroupName != null;

					if (rgPresent && !rgPresent2) {
						log.info("Skipping VPE " + equipData.equipmentId +
						        ": This request requires new HUB with RG VRF, " +
						        "but there is already another HUB VRF with no RG: " + vrfName2 + ".");
						return false;
					}
					if (!rgPresent && rgPresent2) {
						log.info("Skipping VPE " + equipData.equipmentId +
						        ": This request requires new HUB VRF with no RG, " +
						        "but there is already another HUB with RG VRF: " + vrfName2 + ".");
						return false;
					}
				}
			}
		}

		return true;
	}

	public void setResourceManager(ResourceManager resourceManager) {
		this.resourceManager = resourceManager;
	}
}