/*
 * 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.artemis.jms.client;

import javax.jms.IllegalStateException;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Queue;
import javax.jms.QueueReceiver;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.TopicSubscriber;

import org.apache.activemq.artemis.api.core.ActiveMQException;
import org.apache.activemq.artemis.api.core.SimpleString;
import org.apache.activemq.artemis.api.core.client.ClientConsumer;
import org.apache.activemq.artemis.api.core.client.ClientMessage;
import org.apache.activemq.artemis.api.core.client.MessageHandler;
import org.apache.activemq.artemis.api.jms.ActiveMQJMSConstants;

/**
 * ActiveMQ Artemis implementation of a JMS MessageConsumer.
 */
public final class ActiveMQMessageConsumer implements QueueReceiver, TopicSubscriber {

   private final ClientConsumer consumer;

   private MessageListener listener;

   private MessageHandler coreListener;

   private final ActiveMQConnection connection;

   private final ActiveMQSession session;

   private final int ackMode;

   private final boolean noLocal;

   private final ActiveMQDestination destination;

   private final String selector;

   private final SimpleString autoDeleteQueueName;

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

   protected ActiveMQMessageConsumer(final ActiveMQConnection connection,
                                     final ActiveMQSession session,
                                     final ClientConsumer consumer,
                                     final boolean noLocal,
                                     final ActiveMQDestination destination,
                                     final String selector,
                                     final SimpleString autoDeleteQueueName) throws JMSException {
      this.connection = connection;

      this.session = session;

      this.consumer = consumer;

      ackMode = session.getAcknowledgeMode();

      this.noLocal = noLocal;

      this.destination = destination;

      this.selector = selector;

      this.autoDeleteQueueName = autoDeleteQueueName;
   }

   // MessageConsumer implementation --------------------------------

   public String getMessageSelector() throws JMSException {
      checkClosed();

      return selector;
   }

   public MessageListener getMessageListener() throws JMSException {
      checkClosed();

      return listener;
   }

   public void setMessageListener(final MessageListener listener) throws JMSException {
      this.listener = listener;

      coreListener = listener == null ? null : new JMSMessageListenerWrapper(connection, session, consumer, listener, ackMode);

      try {
         consumer.setMessageHandler(coreListener);
      }
      catch (ActiveMQException e) {
         throw JMSExceptionHelper.convertFromActiveMQException(e);
      }
   }

   public Message receive() throws JMSException {
      return getMessage(0, false);
   }

   public Message receive(final long timeout) throws JMSException {
      return getMessage(timeout, false);
   }

   public Message receiveNoWait() throws JMSException {
      return getMessage(0, true);
   }

   public void close() throws JMSException {
      try {
         consumer.close();

         if (autoDeleteQueueName != null) {
            // If non durable subscriber need to delete subscription too
            session.deleteQueue(autoDeleteQueueName);
         }

         session.removeConsumer(this);
      }
      catch (ActiveMQException e) {
         throw JMSExceptionHelper.convertFromActiveMQException(e);
      }
   }

   // QueueReceiver implementation ----------------------------------

   public Queue getQueue() throws JMSException {
      checkClosed();

      return (Queue) destination;
   }

   // TopicSubscriber implementation --------------------------------

   public Topic getTopic() throws JMSException {
      checkClosed();

      return (Topic) destination;
   }

   public boolean getNoLocal() throws JMSException {
      checkClosed();

      return noLocal;
   }

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

   @Override
   public String toString() {
      return "ActiveMQMessageConsumer[" + consumer + "]";
   }

   public boolean isClosed() {
      return consumer.isClosed();
   }

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

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

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

   private void checkClosed() throws JMSException {
      if (consumer.isClosed() || session.getCoreSession().isClosed()) {
         throw new IllegalStateException("Consumer is closed");
      }
   }

   private ActiveMQMessage getMessage(final long timeout, final boolean noWait) throws JMSException {
      try {
         ClientMessage coreMessage;

         if (noWait) {
            coreMessage = consumer.receiveImmediate();
         }
         else {
            coreMessage = consumer.receive(timeout);
         }

         ActiveMQMessage jmsMsg = null;

         if (coreMessage != null) {
            boolean needSession = ackMode == Session.CLIENT_ACKNOWLEDGE || ackMode == ActiveMQJMSConstants.INDIVIDUAL_ACKNOWLEDGE;
            jmsMsg = ActiveMQMessage.createMessage(coreMessage, needSession ? session.getCoreSession() : null);

            jmsMsg.doBeforeReceive();

            // We Do the ack after doBeforeRecive, as in the case of large messages, this may fail so we don't want messages redelivered
            // https://issues.jboss.org/browse/JBPAPP-6110
            if (session.getAcknowledgeMode() == ActiveMQJMSConstants.INDIVIDUAL_ACKNOWLEDGE) {
               jmsMsg.setIndividualAcknowledge();
            }
            else {
               coreMessage.acknowledge();
            }
         }

         return jmsMsg;
      }
      catch (ActiveMQException e) {
         throw JMSExceptionHelper.convertFromActiveMQException(e);
      }
   }

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

}
