/*
 * 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.
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package org.apache.activemq.artemis.tests.integration.management;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.json.JsonArray;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;

import org.apache.activemq.artemis.api.core.DiscoveryGroupConfiguration;
import org.apache.activemq.artemis.api.core.JsonUtil;
import org.apache.activemq.artemis.api.core.SimpleString;
import org.apache.activemq.artemis.api.core.TransportConfiguration;
import org.apache.activemq.artemis.api.core.UDPBroadcastEndpointFactory;
import org.apache.activemq.artemis.api.core.management.ClusterConnectionControl;
import org.apache.activemq.artemis.api.core.management.CoreNotificationType;
import org.apache.activemq.artemis.api.core.management.ObjectNameBuilder;
import org.apache.activemq.artemis.core.config.ClusterConnectionConfiguration;
import org.apache.activemq.artemis.core.config.Configuration;
import org.apache.activemq.artemis.core.config.CoreQueueConfiguration;
import org.apache.activemq.artemis.core.remoting.impl.invm.InVMAcceptorFactory;
import org.apache.activemq.artemis.core.remoting.impl.invm.InVMConnectorFactory;
import org.apache.activemq.artemis.core.remoting.impl.invm.TransportConstants;
import org.apache.activemq.artemis.core.server.ActiveMQServer;
import org.apache.activemq.artemis.core.server.ActiveMQServers;
import org.apache.activemq.artemis.core.server.cluster.impl.ClusterConnectionMetrics;
import org.apache.activemq.artemis.core.server.cluster.impl.MessageLoadBalancingType;
import org.apache.activemq.artemis.core.server.management.Notification;
import org.apache.activemq.artemis.tests.integration.SimpleNotificationService;
import org.apache.activemq.artemis.utils.RandomUtil;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

public class ClusterConnectionControlTest extends ManagementTestBase {

   // Constants -----------------------------------------------------

   // Attributes ----------------------------------------------------

   private ActiveMQServer server_0;

   private ClusterConnectionConfiguration clusterConnectionConfig1;

   private ClusterConnectionConfiguration clusterConnectionConfig2;

   private ActiveMQServer server_1;

   private MBeanServer mbeanServer_1;

   // Constructors --------------------------------------------------

   // Public --------------------------------------------------------

   @Test
   public void testAttributes1() throws Exception {
      checkResource(ObjectNameBuilder.DEFAULT.getClusterConnectionObjectName(clusterConnectionConfig1.getName()));

      ClusterConnectionControl clusterConnectionControl = createManagementControl(clusterConnectionConfig1.getName());

      Assert.assertEquals(clusterConnectionConfig1.getName(), clusterConnectionControl.getName());
      Assert.assertEquals(clusterConnectionConfig1.getAddress(), clusterConnectionControl.getAddress());
      Assert.assertEquals(clusterConnectionConfig1.getDiscoveryGroupName(), clusterConnectionControl.getDiscoveryGroupName());
      Assert.assertEquals(clusterConnectionConfig1.getRetryInterval(), clusterConnectionControl.getRetryInterval());
      Assert.assertEquals(clusterConnectionConfig1.isDuplicateDetection(), clusterConnectionControl.isDuplicateDetection());
      Assert.assertEquals(clusterConnectionConfig1.getMessageLoadBalancingType().getType(), clusterConnectionControl.getMessageLoadBalancingType());
      Assert.assertEquals(clusterConnectionConfig1.getMaxHops(), clusterConnectionControl.getMaxHops());
      Assert.assertEquals(0L, clusterConnectionControl.getMessagesPendingAcknowledgement());
      Assert.assertEquals(0L, clusterConnectionControl.getMessagesAcknowledged());
      Map<String, Object> clusterMetrics = clusterConnectionControl.getMetrics();
      Assert.assertEquals(0L, clusterMetrics.get(ClusterConnectionMetrics.MESSAGES_PENDING_ACKNOWLEDGEMENT_KEY));
      Assert.assertEquals(0L, clusterMetrics.get(ClusterConnectionMetrics.MESSAGES_ACKNOWLEDGED_KEY));
      Assert.assertNull(clusterConnectionControl.getBridgeMetrics("bad"));

      Object[] connectors = clusterConnectionControl.getStaticConnectors();
      Assert.assertEquals(1, connectors.length);
      String connector = (String) connectors[0];
      Assert.assertEquals(clusterConnectionConfig1.getStaticConnectors().get(0), connector);

      String jsonString = clusterConnectionControl.getStaticConnectorsAsJSON();
      Assert.assertNotNull(jsonString);
      JsonArray array = JsonUtil.readJsonArray(jsonString);
      Assert.assertEquals(1, array.size());
      Assert.assertEquals(clusterConnectionConfig1.getStaticConnectors().get(0), array.getString(0));

      Assert.assertNull(clusterConnectionControl.getDiscoveryGroupName());

      Assert.assertTrue(clusterConnectionControl.isStarted());
   }

   @Test
   public void testAttributes2() throws Exception {
      checkResource(ObjectNameBuilder.DEFAULT.getClusterConnectionObjectName(clusterConnectionConfig2.getName()));

      ClusterConnectionControl clusterConnectionControl = createManagementControl(clusterConnectionConfig2.getName());

      Assert.assertEquals(clusterConnectionConfig2.getName(), clusterConnectionControl.getName());
      Assert.assertEquals(clusterConnectionConfig2.getAddress(), clusterConnectionControl.getAddress());
      Assert.assertEquals(clusterConnectionConfig2.getDiscoveryGroupName(), clusterConnectionControl.getDiscoveryGroupName());
      Assert.assertEquals(clusterConnectionConfig2.getRetryInterval(), clusterConnectionControl.getRetryInterval());
      Assert.assertEquals(clusterConnectionConfig2.isDuplicateDetection(), clusterConnectionControl.isDuplicateDetection());
      Assert.assertEquals(clusterConnectionConfig2.getMessageLoadBalancingType().getType(), clusterConnectionControl.getMessageLoadBalancingType());
      Assert.assertEquals(clusterConnectionConfig2.getMaxHops(), clusterConnectionControl.getMaxHops());

      Object[] connectorPairs = clusterConnectionControl.getStaticConnectors();
      Assert.assertEquals(0, connectorPairs.length);

      String jsonPairs = clusterConnectionControl.getStaticConnectorsAsJSON();
      Assert.assertEquals("[]", jsonPairs);

      Assert.assertEquals(clusterConnectionConfig2.getDiscoveryGroupName(), clusterConnectionControl.getDiscoveryGroupName());
   }

   @Test
   public void testStartStop() throws Exception {
      checkResource(ObjectNameBuilder.DEFAULT.getClusterConnectionObjectName(clusterConnectionConfig1.getName()));
      ClusterConnectionControl clusterConnectionControl = createManagementControl(clusterConnectionConfig1.getName());

      // started by the server
      Assert.assertTrue(clusterConnectionControl.isStarted());

      clusterConnectionControl.stop();
      Assert.assertFalse(clusterConnectionControl.isStarted());

      clusterConnectionControl.start();
      Assert.assertTrue(clusterConnectionControl.isStarted());
   }

   @Test
   public void testNotifications() throws Exception {
      SimpleNotificationService.Listener notifListener = new SimpleNotificationService.Listener();
      checkResource(ObjectNameBuilder.DEFAULT.getClusterConnectionObjectName(clusterConnectionConfig1.getName()));
      ClusterConnectionControl clusterConnectionControl = createManagementControl(clusterConnectionConfig1.getName());

      server_0.getManagementService().addNotificationListener(notifListener);

      Assert.assertEquals(0, notifListener.getNotifications().size());

      clusterConnectionControl.stop();

      Assert.assertTrue(notifListener.getNotifications().size() > 0);
      Notification notif = getFirstNotificationOfType(notifListener.getNotifications(), CoreNotificationType.CLUSTER_CONNECTION_STOPPED);
      Assert.assertNotNull(notif);
      Assert.assertEquals(clusterConnectionControl.getName(), notif.getProperties().getSimpleStringProperty(new SimpleString("name")).toString());

      clusterConnectionControl.start();

      Assert.assertTrue(notifListener.getNotifications().size() > 0);
      notif = getFirstNotificationOfType(notifListener.getNotifications(), CoreNotificationType.CLUSTER_CONNECTION_STARTED);
      Assert.assertNotNull(notif);
      Assert.assertEquals(clusterConnectionControl.getName(), notif.getProperties().getSimpleStringProperty(new SimpleString("name")).toString());
   }

   private Notification getFirstNotificationOfType(List<Notification> notifications, CoreNotificationType type) {
      Notification result = null;

      // the notifications can change while we're looping
      List<Notification> notificationsClone = new ArrayList<>(notifications);

      for (Notification notification : notificationsClone) {
         if (notification.getType().equals(type)) {
            result = notification;
         }
      }

      return result;
   }

   // Package protected ---------------------------------------------

   // Protected -----------------------------------------------------

   @Override
   @Before
   public void setUp() throws Exception {
      super.setUp();

      Map<String, Object> acceptorParams = new HashMap<>();
      acceptorParams.put(TransportConstants.SERVER_ID_PROP_NAME, 1);
      TransportConfiguration acceptorConfig = new TransportConfiguration(InVMAcceptorFactory.class.getName(), acceptorParams, RandomUtil.randomString());

      TransportConfiguration connectorConfig = new TransportConfiguration(InVMConnectorFactory.class.getName(), acceptorParams, RandomUtil.randomString());

      CoreQueueConfiguration queueConfig = new CoreQueueConfiguration().setAddress(RandomUtil.randomString()).setName(RandomUtil.randomString()).setDurable(false);
      List<String> connectors = new ArrayList<>();
      connectors.add(connectorConfig.getName());

      String discoveryGroupName = RandomUtil.randomString();
      DiscoveryGroupConfiguration discoveryGroupConfig = new DiscoveryGroupConfiguration().setName(discoveryGroupName).setRefreshTimeout(500).setDiscoveryInitialWaitTimeout(0).setBroadcastEndpointFactory(new UDPBroadcastEndpointFactory().setGroupAddress(getUDPDiscoveryAddress()).setGroupPort(getUDPDiscoveryPort()));

      Configuration conf_1 = createBasicConfig().addAcceptorConfiguration(acceptorConfig).addQueueConfiguration(queueConfig);

      clusterConnectionConfig1 = new ClusterConnectionConfiguration().setName(RandomUtil.randomString()).setAddress(queueConfig.getAddress()).setConnectorName(connectorConfig.getName()).setRetryInterval(RandomUtil.randomPositiveLong()).setDuplicateDetection(RandomUtil.randomBoolean()).setMessageLoadBalancingType(MessageLoadBalancingType.STRICT).setMaxHops(RandomUtil.randomPositiveInt()).setConfirmationWindowSize(RandomUtil.randomPositiveInt()).setMessageLoadBalancingType(MessageLoadBalancingType.ON_DEMAND).setStaticConnectors(connectors);

      clusterConnectionConfig2 = new ClusterConnectionConfiguration().setName(RandomUtil.randomString()).setAddress(queueConfig.getAddress()).setConnectorName(connectorConfig.getName()).setRetryInterval(RandomUtil.randomPositiveLong()).setDuplicateDetection(RandomUtil.randomBoolean()).setMessageLoadBalancingType(MessageLoadBalancingType.OFF).setMaxHops(RandomUtil.randomPositiveInt()).setConfirmationWindowSize(RandomUtil.randomPositiveInt()).setMessageLoadBalancingType(MessageLoadBalancingType.ON_DEMAND).setDiscoveryGroupName(discoveryGroupName);

      Configuration conf_0 = createBasicConfig().addAcceptorConfiguration(new TransportConfiguration(InVMAcceptorFactory.class.getName())).addConnectorConfiguration(connectorConfig.getName(), connectorConfig).addClusterConfiguration(clusterConnectionConfig1).addClusterConfiguration(clusterConnectionConfig2).addDiscoveryGroupConfiguration(discoveryGroupName, discoveryGroupConfig);

      mbeanServer_1 = MBeanServerFactory.createMBeanServer();
      server_1 = addServer(ActiveMQServers.newActiveMQServer(conf_1, mbeanServer_1, false));
      server_1.start();

      server_0 = addServer(ActiveMQServers.newActiveMQServer(conf_0, mbeanServer, false));
      server_0.start();
   }

   @Override
   @After
   public void tearDown() throws Exception {
      MBeanServerFactory.releaseMBeanServer(mbeanServer_1);
      super.tearDown();
   }

   protected ClusterConnectionControl createManagementControl(final String name) throws Exception {
      return ManagementControlHelper.createClusterConnectionControl(name, mbeanServer);
   }

   // Private -------------------------------------------------------

   // Inner classes -------------------------------------------------

}
