/**
 * 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.bugs;

import static org.junit.Assert.*;

import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TopicSubscriber;
import javax.management.ObjectName;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.broker.jmx.BrokerView;
import org.apache.activemq.broker.jmx.TopicViewMBean;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.activemq.util.Wait;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class AMQ3675Test {

   private static Logger LOG = LoggerFactory.getLogger(AMQ3675Test.class);

   private final static int deliveryMode = DeliveryMode.NON_PERSISTENT;
   private final static ActiveMQTopic destination = new ActiveMQTopic("XYZ");

   private ActiveMQConnectionFactory factory;
   private BrokerService broker;

   public TopicViewMBean getTopicView() throws Exception {
      ObjectName destinationName = broker.getAdminView().getTopics()[0];
      TopicViewMBean topicView = (TopicViewMBean) broker.getManagementContext().newProxyInstance(destinationName, TopicViewMBean.class, true);
      return topicView;
   }

   @Test
   public void countConsumers() throws Exception {

      final Connection producerConnection = factory.createConnection();
      producerConnection.start();
      final Connection consumerConnection = factory.createConnection();

      consumerConnection.setClientID("subscriber1");
      Session consumerMQSession = consumerConnection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
      TopicSubscriber consumer = consumerMQSession.createDurableSubscriber(destination, "myTopic");
      consumerConnection.start();

      Session session = producerConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
      MessageProducer producer = session.createProducer(destination);
      producer.setDeliveryMode(deliveryMode);

      final BrokerView brokerView = broker.getAdminView();
      final TopicViewMBean topicView = getTopicView();

      assertTrue("Should have one consumer on topic: ", Wait.waitFor(new Wait.Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            return topicView.getConsumerCount() == 1;
         }
      }));

      consumer.close();

      assertTrue("Durable consumer should now be inactive.", Wait.waitFor(new Wait.Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            return brokerView.getInactiveDurableTopicSubscribers().length == 1;
         }
      }));

      try {
         brokerView.removeTopic(destination.getTopicName());
      }
      catch (Exception e1) {
         fail("Unable to remove destination:" + destination.getPhysicalName());
      }

      assertTrue("Should have no topics on the broker", Wait.waitFor(new Wait.Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            return brokerView.getTopics().length == 0;
         }
      }));

      try {
         brokerView.destroyDurableSubscriber("subscriber1", "myTopic");
      }
      catch (Exception e) {
         fail("Exception not expected when attempting to delete Durable consumer.");
      }

      assertTrue("Should be no durable consumers active or inactive.", Wait.waitFor(new Wait.Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            return brokerView.getInactiveDurableTopicSubscribers().length == 0 && brokerView.getDurableTopicSubscribers().length == 0;
         }
      }));

      consumer = consumerMQSession.createDurableSubscriber(destination, "myTopic");

      consumer.close();

      assertTrue("Should be one consumer on the Topic.", Wait.waitFor(new Wait.Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            LOG.info("Number of inactive consumers: " + brokerView.getInactiveDurableTopicSubscribers().length);
            return brokerView.getInactiveDurableTopicSubscribers().length == 1;
         }
      }));

      final TopicViewMBean recreatedTopicView = getTopicView();

      assertTrue("Should have one consumer on topic: ", Wait.waitFor(new Wait.Condition() {
         @Override
         public boolean isSatisified() throws Exception {
            return recreatedTopicView.getConsumerCount() == 1;
         }
      }));
   }

   @Before
   public void setUp() throws Exception {
      broker = new BrokerService();
      broker.setPersistent(false);
      broker.setUseJmx(true);
      broker.setAdvisorySupport(false);
      broker.setDeleteAllMessagesOnStartup(true);
      TransportConnector connector = broker.addConnector("tcp://localhost:0");
      broker.start();

      factory = new ActiveMQConnectionFactory(connector.getPublishableConnectString());
      factory.setAlwaysSyncSend(true);
      factory.setDispatchAsync(false);
   }

   @After
   public void tearDown() throws Exception {
      broker.stop();
   }
}
