/*-
 * ============LICENSE_START=======================================================
 * OPENECOMP - SO
 * ================================================================================
 * 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.mso.adapters.vnf;

import java.util.Optional;

import org.openecomp.mso.cloud.CloudConfigFactory;
import org.openecomp.mso.cloud.CloudSite;
import org.openecomp.mso.logger.MsoLogger;
import org.openecomp.mso.properties.MsoPropertiesFactory;

public class VnfAdapterRestUtils
{
	private static MsoLogger LOGGER = MsoLogger.getMsoLogger (MsoLogger.Catalog.RA);
	private static CloudConfigFactory cloudConfigFactory = new CloudConfigFactory();
	private static MsoPropertiesFactory msoPropertiesFactory = new MsoPropertiesFactory();

	/*
	 * Choose which implementation of VNF Adapter to use, based on the orchestration mode.
	 * Currently, the two supported orchestrators are HEAT and CLOUDIFY.
	 */
	public static MsoVnfAdapter getVnfAdapterImpl (String mode, String cloudSiteId)
	{
		// First, determine the orchestration mode to use.
		// If was explicitly provided as a parameter, use that.  Else if specified for the
		// cloudsite, use that.  Otherwise, the default is the (original) HEAT-based impl.

		LOGGER.debug ("Entered GetVnfAdapterImpl: mode=" + mode + ", cloudSite=" + cloudSiteId);

		if (mode == null) {
			// Didn't get an explicit mode type requested.
			// Use the CloudSite to determine which Impl to use, based on whether the target cloutSite
			// has a CloudifyManager assigned to it
			Optional<CloudSite> cloudSite = cloudConfigFactory.getCloudConfig().getCloudSite(cloudSiteId);
			if (cloudSite.isPresent()) {
				LOGGER.debug("Got CloudSite: " + cloudSite.toString());
				if (cloudSite.get().getCloudifyManager() != null) {
					mode = "CLOUDIFY";
				} else {
					mode = "HEAT";
				}
			}
		}

		LOGGER.debug ("GetVnfAdapterImpl: mode=" + mode);

		MsoVnfAdapter vnfAdapter = null;
		
		// TODO:  Make this more dynamic (e.g. Service Loader)
		if ("CLOUDIFY".equalsIgnoreCase(mode)) {
			LOGGER.debug ("GetVnfAdapterImpl: Return Cloudify Adapter");
			vnfAdapter = new MsoVnfCloudifyAdapterImpl (msoPropertiesFactory, cloudConfigFactory);;
		}
		else if ("HEAT".equalsIgnoreCase(mode)) {
			LOGGER.debug ("GetVnfAdapterImpl: Return Heat Adapter");
			vnfAdapter = new MsoVnfAdapterImpl (msoPropertiesFactory, cloudConfigFactory);
		}
		else {
			// Default is the PLUGIN adapter
			LOGGER.debug ("GetVnfAdapterImpl: Return Default (Plugin) Adapter");
			vnfAdapter = new MsoVnfPluginAdapterImpl (msoPropertiesFactory, cloudConfigFactory);
		}
		
		return vnfAdapter;
	}

}