/**
 * 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.activemq.usecases;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.TopicSubscriber;
import javax.management.ObjectName;
import java.net.URI;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.network.DiscoveryNetworkConnector;
import org.apache.activemq.network.NetworkConnector;
import org.apache.activemq.network.NetworkTestSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Tests durable topic subscriptions inside a network of brokers.
 *
 * @author tmielke
 */
public class DurableSubInBrokerNetworkTest extends NetworkTestSupport {

   private static final Logger LOG = LoggerFactory.getLogger(DurableSubInBrokerNetworkTest.class);
   // protected BrokerService localBroker;
   private final String subName = "Subscriber1";
   private final String subName2 = "Subscriber2";
   private final String topicName = "TEST.FOO";

   @Override
   protected void setUp() throws Exception {
      useJmx = true;
      super.setUp();

      URI ncUri = new URI("static:(" + connector.getConnectUri().toString() + ")");
      NetworkConnector nc = new DiscoveryNetworkConnector(ncUri);
      nc.setDuplex(true);
      remoteBroker.addNetworkConnector(nc);
      nc.start();
   }

   @Override
   protected void tearDown() throws Exception {
      if (remoteBroker.isStarted()) {
         remoteBroker.stop();
         remoteBroker.waitUntilStopped();
      }
      if (broker.isStarted()) {
         broker.stop();
         broker.waitUntilStopped();
      }
      super.tearDown();
   }

   /**
    * Creates a durable topic subscription, checks that it is propagated
    * in the broker network, removes the subscription and checks that
    * the subscription is removed from remote broker as well.
    *
    * @throws Exception
    */
   public void testDurableSubNetwork() throws Exception {
      LOG.info("testDurableSubNetwork started.");

      // create durable sub
      ActiveMQConnectionFactory fact = new ActiveMQConnectionFactory(connector.getConnectUri().toString());
      Connection conn = fact.createConnection();
      conn.setClientID("clientID1");
      Session session = conn.createSession(false, 1);
      Destination dest = session.createTopic(topicName);
      TopicSubscriber sub = session.createDurableSubscriber((Topic) dest, subName);
      LOG.info("Durable subscription of name " + subName + "created.");
      Thread.sleep(100);

      // query durable sub on local and remote broker
      // raise an error if not found

      assertTrue(foundSubInLocalBroker(subName));

      assertTrue(foundSubInRemoteBrokerByTopicName(topicName));

      // unsubscribe from durable sub
      sub.close();
      session.unsubscribe(subName);
      LOG.info("Unsubscribed from durable subscription.");
      Thread.sleep(100);

      // query durable sub on local and remote broker
      // raise an error if its not removed from both brokers
      assertFalse(foundSubInLocalBroker(subName));

      assertFalse("Durable subscription not unregistered on remote broker", foundSubInRemoteBrokerByTopicName(topicName));

   }

   public void testTwoDurableSubsInNetworkWithUnsubscribe() throws Exception {

      // create 1st durable sub to topic TEST.FOO
      ActiveMQConnectionFactory fact = new ActiveMQConnectionFactory(connector.getConnectUri().toString());
      Connection conn = fact.createConnection();
      conn.setClientID("clientID1");
      Session session = conn.createSession(false, 1);
      Destination dest = session.createTopic(topicName);
      TopicSubscriber sub = session.createDurableSubscriber((Topic) dest, subName);
      LOG.info("Durable subscription of name " + subName + "created.");
      TopicSubscriber sub2 = session.createDurableSubscriber((Topic) dest, subName2);
      LOG.info("Durable subscription of name " + subName2 + "created.");

      Thread.sleep(100);

      // query durable sub on local and remote broker
      // raise an error if not found

      assertTrue(foundSubInLocalBroker(subName));
      assertTrue(foundSubInLocalBroker(subName2));

      assertTrue(foundSubInRemoteBrokerByTopicName(topicName));

      // unsubscribe from durable sub
      sub.close();
      session.unsubscribe(subName);
      LOG.info("Unsubscribed from durable subscription.");
      Thread.sleep(100);

      // query durable sub on local and remote broker
      assertFalse(foundSubInLocalBroker(subName));
      assertTrue(foundSubInLocalBroker(subName2));

      assertTrue("Durable subscription should still be on remote broker", foundSubInRemoteBrokerByTopicName(topicName));

      sub2.close();
      session.unsubscribe(subName2);

      Thread.sleep(100);

      assertFalse(foundSubInLocalBroker(subName2));

      assertFalse("Durable subscription not unregistered on remote broker", foundSubInRemoteBrokerByTopicName(topicName));

   }

   private boolean foundSubInRemoteBrokerByTopicName(String topicName) throws Exception {
      boolean foundSub = false;
      ObjectName[] subs = remoteBroker.getAdminView().getDurableTopicSubscribers();
      for (int i = 0; i < subs.length; i++) {
         if (subs[i].toString().contains("destinationName=" + topicName))
            foundSub = true;
      }
      return foundSub;
   }

   private boolean foundSubInLocalBroker(String subName) throws Exception {
      boolean foundSub = false;
      ObjectName[] subs = broker.getAdminView().getDurableTopicSubscribers();

      for (int i = 0; i < subs.length; i++) {
         if (subs[i].toString().contains(subName))
            foundSub = true;
      }
      return foundSub;
   }
}
