/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

package org.apache.flink.streaming.connectors.elasticsearch;

import org.apache.flink.streaming.connectors.elasticsearch5.ElasticsearchSinkITCase;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.network.NetworkModule;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.node.Node;
import org.elasticsearch.node.internal.InternalSettingsPreparer;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.transport.Netty3Plugin;

import java.io.File;
import java.util.Collections;

/**
 * Implementation of {@link EmbeddedElasticsearchNodeEnvironment} for Elasticsearch 5.x.
 * Will be dynamically loaded in {@link ElasticsearchSinkITCase} for integration tests.
 */
public class EmbeddedElasticsearchNodeEnvironmentImpl implements EmbeddedElasticsearchNodeEnvironment {

	private Node node;

	@Override
	public void start(File tmpDataFolder, String clusterName) throws Exception {
		if (node == null) {
			Settings settings = Settings.builder()
				.put("cluster.name", clusterName)
				.put("http.enabled", false)
				.put("path.home", tmpDataFolder.getParent())
				.put("path.data", tmpDataFolder.getAbsolutePath())
				.put(NetworkModule.HTTP_TYPE_KEY, Netty3Plugin.NETTY_HTTP_TRANSPORT_NAME)
				.put(NetworkModule.TRANSPORT_TYPE_KEY, Netty3Plugin.NETTY_TRANSPORT_NAME)
				.build();

			node = new PluginNode(settings);
			node.start();
		}
	}

	@Override
	public void close() throws Exception {
		if (node != null && !node.isClosed()) {
			node.close();
			node = null;
		}
	}

	@Override
	public Client getClient() {
		if (node != null && !node.isClosed()) {
			return node.client();
		} else {
			return null;
		}
	}

	private static class PluginNode extends Node {
		public PluginNode(Settings settings) {
			super(InternalSettingsPreparer.prepareEnvironment(settings, null), Collections.<Class<? extends Plugin>>singletonList(Netty3Plugin.class));
		}
	}

}