/**
 * 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.broker;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.concurrent.TimeUnit;

import javax.jms.DeliveryMode;
import javax.jms.MessageNotWriteableException;

import org.apache.activemq.CombinationTestSupport;
import org.apache.activemq.broker.region.RegionBroker;
import org.apache.activemq.broker.region.policy.FixedCountSubscriptionRecoveryPolicy;
import org.apache.activemq.broker.region.policy.PolicyEntry;
import org.apache.activemq.broker.region.policy.PolicyMap;
import org.apache.activemq.broker.region.policy.RoundRobinDispatchPolicy;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQTextMessage;
import org.apache.activemq.command.ConnectionId;
import org.apache.activemq.command.ConnectionInfo;
import org.apache.activemq.command.ConsumerInfo;
import org.apache.activemq.command.DestinationInfo;
import org.apache.activemq.command.LocalTransactionId;
import org.apache.activemq.command.Message;
import org.apache.activemq.command.MessageAck;
import org.apache.activemq.command.MessageDispatch;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.command.ProducerInfo;
import org.apache.activemq.command.RemoveInfo;
import org.apache.activemq.command.SessionInfo;
import org.apache.activemq.command.TransactionId;
import org.apache.activemq.command.TransactionInfo;
import org.apache.activemq.command.XATransactionId;
import org.apache.activemq.store.PersistenceAdapter;
import org.apache.activemq.usage.SystemUsage;

public class BrokerTestSupport extends CombinationTestSupport {

   /**
    * Setting this to false makes the test run faster but they may be less
    * accurate.
    */
   public static final boolean FAST_NO_MESSAGE_LEFT_ASSERT = System.getProperty("FAST_NO_MESSAGE_LEFT_ASSERT", "true").equals("true");

   protected RegionBroker regionBroker;
   public BrokerService broker;
   protected long idGenerator;
   protected int msgIdGenerator;
   protected int txGenerator;
   protected int tempDestGenerator;
   public PersistenceAdapter persistenceAdapter;

   protected String queueName = "TEST";

   protected int maxWait = 10000;

   protected SystemUsage memoryManager;
   protected PolicyMap policyMap = new PolicyMap();

   @Override
   protected void setUp() throws Exception {
      super.setUp();
      broker = createBroker();
      policyMap.setDefaultEntry(getDefaultPolicy());
      broker.setDestinationPolicy(policyMap);
      broker.start();
   }

   protected PolicyEntry getDefaultPolicy() {
      PolicyEntry policy = new PolicyEntry();
      policy.setDispatchPolicy(new RoundRobinDispatchPolicy());
      policy.setSubscriptionRecoveryPolicy(new FixedCountSubscriptionRecoveryPolicy());
      return policy;
   }

   protected BrokerService createBroker() throws Exception {
      BrokerService broker = BrokerFactory.createBroker(new URI("broker:()/localhost?persistent=false"));
      return broker;
   }

   @Override
   protected void tearDown() throws Exception {
      broker.stop();
      broker.waitUntilStopped();
      broker = null;
      regionBroker = null;
      persistenceAdapter = null;
      memoryManager = null;
      super.tearDown();
   }

   protected ConsumerInfo createConsumerInfo(SessionInfo sessionInfo,
                                             ActiveMQDestination destination) throws Exception {
      ConsumerInfo info = new ConsumerInfo(sessionInfo, ++idGenerator);
      info.setBrowser(false);
      info.setDestination(destination);
      info.setPrefetchSize(1000);
      info.setDispatchAsync(false);
      return info;
   }

   protected RemoveInfo closeConsumerInfo(ConsumerInfo consumerInfo) {
      return consumerInfo.createRemoveCommand();
   }

   protected ProducerInfo createProducerInfo(SessionInfo sessionInfo) throws Exception {
      ProducerInfo info = new ProducerInfo(sessionInfo, ++idGenerator);
      return info;
   }

   protected SessionInfo createSessionInfo(ConnectionInfo connectionInfo) throws Exception {
      SessionInfo info = new SessionInfo(connectionInfo, ++idGenerator);
      return info;
   }

   protected ConnectionInfo createConnectionInfo() throws Exception {
      ConnectionInfo info = new ConnectionInfo();
      info.setConnectionId(new ConnectionId("connection:" + (++idGenerator)));
      info.setClientId(info.getConnectionId().getValue());
      return info;
   }

   protected Message createMessage(ProducerInfo producerInfo, ActiveMQDestination destination) {
      ActiveMQTextMessage message = new ActiveMQTextMessage();
      message.setMessageId(new MessageId(producerInfo, ++msgIdGenerator));
      message.setDestination(destination);
      message.setPersistent(false);
      try {
         message.setText("Test Message Payload.");
      }
      catch (MessageNotWriteableException e) {
      }
      return message;
   }

   protected MessageAck createAck(ConsumerInfo consumerInfo, Message msg, int count, byte ackType) {
      MessageAck ack = new MessageAck();
      ack.setAckType(ackType);
      ack.setConsumerId(consumerInfo.getConsumerId());
      ack.setDestination(msg.getDestination());
      ack.setLastMessageId(msg.getMessageId());
      ack.setMessageCount(count);
      return ack;
   }

   protected void gc() {
      regionBroker.gc();
   }

   protected void profilerPause(String prompt) throws IOException {
      if (System.getProperty("profiler") != null) {
         System.out.println();
         System.out.println(prompt + "> Press enter to continue: ");
         while (System.in.read() != '\n') {
         }
         System.out.println(prompt + "> Done.");
      }
   }

   protected RemoveInfo closeConnectionInfo(ConnectionInfo info) {
      return info.createRemoveCommand();
   }

   protected RemoveInfo closeSessionInfo(SessionInfo info) {
      return info.createRemoveCommand();
   }

   protected RemoveInfo closeProducerInfo(ProducerInfo info) {
      return info.createRemoveCommand();
   }

   protected Message createMessage(ProducerInfo producerInfo, ActiveMQDestination destination, int deliveryMode) {
      Message message = createMessage(producerInfo, destination);
      message.setPersistent(deliveryMode == DeliveryMode.PERSISTENT);
      return message;
   }

   protected LocalTransactionId createLocalTransaction(SessionInfo info) {
      LocalTransactionId id = new LocalTransactionId(info.getSessionId().getParentId(), ++txGenerator);
      return id;
   }

   protected XATransactionId createXATransaction(SessionInfo info) throws IOException {
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      DataOutputStream os = new DataOutputStream(baos);
      os.writeLong(++txGenerator);
      os.close();
      byte[] bs = baos.toByteArray();

      XATransactionId xid = new XATransactionId();
      xid.setBranchQualifier(bs);
      xid.setGlobalTransactionId(bs);
      xid.setFormatId(55);
      return xid;
   }

   protected TransactionInfo createBeginTransaction(ConnectionInfo connectionInfo, TransactionId txid) {
      TransactionInfo info = new TransactionInfo(connectionInfo.getConnectionId(), txid, TransactionInfo.BEGIN);
      return info;
   }

   protected TransactionInfo createPrepareTransaction(ConnectionInfo connectionInfo, TransactionId txid) {
      TransactionInfo info = new TransactionInfo(connectionInfo.getConnectionId(), txid, TransactionInfo.PREPARE);
      return info;
   }

   protected TransactionInfo createCommitTransaction1Phase(ConnectionInfo connectionInfo, TransactionId txid) {
      TransactionInfo info = new TransactionInfo(connectionInfo.getConnectionId(), txid, TransactionInfo.COMMIT_ONE_PHASE);
      return info;
   }

   protected TransactionInfo createCommitTransaction2Phase(ConnectionInfo connectionInfo, TransactionId txid) {
      TransactionInfo info = new TransactionInfo(connectionInfo.getConnectionId(), txid, TransactionInfo.COMMIT_TWO_PHASE);
      return info;
   }

   protected TransactionInfo createRollbackTransaction(ConnectionInfo connectionInfo, TransactionId txid) {
      TransactionInfo info = new TransactionInfo(connectionInfo.getConnectionId(), txid, TransactionInfo.ROLLBACK);
      return info;
   }

   protected int countMessagesInQueue(StubConnection connection,
                                      ConnectionInfo connectionInfo,
                                      ActiveMQDestination destination) throws Exception {

      SessionInfo sessionInfo = createSessionInfo(connectionInfo);
      connection.send(sessionInfo);
      ConsumerInfo consumerInfo = createConsumerInfo(sessionInfo, destination);
      consumerInfo.setPrefetchSize(1);
      consumerInfo.setBrowser(true);
      connection.send(consumerInfo);

      ArrayList<Object> skipped = new ArrayList<Object>();

      // Now get the messages.
      Object m = connection.getDispatchQueue().poll(maxWait, TimeUnit.MILLISECONDS);
      int i = 0;
      while (m != null) {
         if (m instanceof MessageDispatch && ((MessageDispatch) m).getConsumerId().equals(consumerInfo.getConsumerId())) {
            MessageDispatch md = (MessageDispatch) m;
            if (md.getMessage() != null) {
               i++;
               connection.send(createAck(consumerInfo, md.getMessage(), 1, MessageAck.STANDARD_ACK_TYPE));
            }
            else {
               break;
            }
         }
         else {
            skipped.add(m);
         }
         m = connection.getDispatchQueue().poll(maxWait, TimeUnit.MILLISECONDS);
      }

      for (Iterator<Object> iter = skipped.iterator(); iter.hasNext(); ) {
         connection.getDispatchQueue().put(iter.next());
      }

      connection.send(closeSessionInfo(sessionInfo));
      return i;

   }

   protected DestinationInfo createTempDestinationInfo(ConnectionInfo connectionInfo, byte destinationType) {
      DestinationInfo info = new DestinationInfo();
      info.setConnectionId(connectionInfo.getConnectionId());
      info.setOperationType(DestinationInfo.ADD_OPERATION_TYPE);
      info.setDestination(ActiveMQDestination.createDestination(info.getConnectionId() + ":" + (++tempDestGenerator), destinationType));
      return info;
   }

   protected ActiveMQDestination createDestinationInfo(StubConnection connection,
                                                       ConnectionInfo connectionInfo1,
                                                       byte destinationType) throws Exception {
      if ((destinationType & ActiveMQDestination.TEMP_MASK) != 0) {
         DestinationInfo info = createTempDestinationInfo(connectionInfo1, destinationType);
         connection.send(info);
         return info.getDestination();
      }
      else {
         return ActiveMQDestination.createDestination(queueName, destinationType);
      }
   }

   protected DestinationInfo closeDestinationInfo(DestinationInfo info) {
      info.setOperationType(DestinationInfo.REMOVE_OPERATION_TYPE);
      info.setTimeout(0);
      return info;
   }

   public static void recursiveDelete(File f) {
      if (f.isDirectory()) {
         File[] files = f.listFiles();
         for (int i = 0; i < files.length; i++) {
            recursiveDelete(files[i]);
         }
      }
      f.delete();
   }

   protected StubConnection createConnection() throws Exception {
      return new StubConnection(broker);
   }

   /**
    * @param connection
    * @return
    * @throws InterruptedException
    */
   public Message receiveMessage(StubConnection connection) throws InterruptedException {
      return receiveMessage(connection, maxWait);
   }

   public Message receiveMessage(StubConnection connection, long timeout) throws InterruptedException {
      while (true) {
         Object o = connection.getDispatchQueue().poll(timeout, TimeUnit.MILLISECONDS);

         if (o == null) {
            return null;
         }
         if (o instanceof MessageDispatch) {

            MessageDispatch dispatch = (MessageDispatch) o;
            if (dispatch.getMessage() == null) {
               return null;
            }
            dispatch.setMessage(dispatch.getMessage().copy());
            dispatch.getMessage().setRedeliveryCounter(dispatch.getRedeliveryCounter());
            return dispatch.getMessage();
         }
      }
   }

   ;

   protected void assertNoMessagesLeft(StubConnection connection) throws InterruptedException {
      long wait = FAST_NO_MESSAGE_LEFT_ASSERT ? 0 : maxWait;
      while (true) {
         Object o = connection.getDispatchQueue().poll(wait, TimeUnit.MILLISECONDS);
         if (o == null) {
            return;
         }
         if (o instanceof MessageDispatch && ((MessageDispatch) o).getMessage() != null) {
            fail("Received a message: " + ((MessageDispatch) o).getMessage().getMessageId());
         }
      }
   }
}
