/*
 * 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;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.List;

import junit.framework.TestCase;

import org.apache.activemq.broker.region.MessageReference;
import org.apache.activemq.command.ActiveMQMessage;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.command.ProducerId;
import org.apache.activemq.util.IdGenerator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * ActiveMQMessageAuditTest
 */
public class ActiveMQMessageAuditTest extends TestCase {

   static final Logger LOG = LoggerFactory.getLogger(ActiveMQMessageAuditTest.class);

   /**
    * Constructor for ActiveMQMessageAuditTest.
    *
    * @param name
    */
   public ActiveMQMessageAuditTest(String name) {
      super(name);
   }

   public static void main(String[] args) {
   }

   @Override
   protected void setUp() throws Exception {
      super.setUp();
   }

   @Override
   protected void tearDown() throws Exception {
      super.tearDown();
   }

   /**
    * test case for isDuplicate
    */
   public void testIsDuplicateString() {
      int count = 10000;
      ActiveMQMessageAudit audit = new ActiveMQMessageAudit();
      IdGenerator idGen = new IdGenerator();
      // add to a list
      List<String> list = new ArrayList<>();
      for (int i = 0; i < count; i++) {
         String id = idGen.generateId();
         list.add(id);
         assertFalse(audit.isDuplicate(id));
      }
      List<String> windowList = list.subList(list.size() - 1 - audit.getAuditDepth(), list.size() - 1);
      for (String id : windowList) {
         assertTrue("duplicate, id:" + id, audit.isDuplicate(id));
      }
   }

   public void testIsDuplicateMessageReference() {
      int count = 10000;
      ActiveMQMessageAudit audit = new ActiveMQMessageAudit();
      // add to a list
      List<MessageReference> list = new ArrayList<>();
      for (int i = 0; i < count; i++) {
         ProducerId pid = new ProducerId();
         pid.setConnectionId("test");
         pid.setSessionId(0);
         pid.setValue(1);
         MessageId id = new MessageId();
         id.setProducerId(pid);
         id.setProducerSequenceId(i);
         ActiveMQMessage msg = new ActiveMQMessage();
         msg.setMessageId(id);
         list.add(msg);
         assertFalse(audit.isDuplicate(msg.getMessageId()));
      }
      List<MessageReference> windowList = list.subList(list.size() - 1 - audit.getAuditDepth(), list.size() - 1);
      for (MessageReference msg : windowList) {
         assertTrue("duplicate msg:" + msg, audit.isDuplicate(msg));
      }
   }

   public void testIsInOrderString() {
      int count = 10000;
      ActiveMQMessageAudit audit = new ActiveMQMessageAudit();
      IdGenerator idGen = new IdGenerator();
      // add to a list
      List<String> list = new ArrayList<>();
      for (int i = 0; i < count; i++) {
         String id = idGen.generateId();
         if (i == 0) {
            assertFalse(audit.isDuplicate(id));
            assertTrue(audit.isInOrder(id));
         }
         if (i > 1 && i % 2 != 0) {
            list.add(id);
         }

      }
      for (String id : list) {
         assertFalse(audit.isInOrder(id));
         assertFalse(audit.isDuplicate(id));
      }
   }

   public void testSerialization() throws Exception {
      ActiveMQMessageAuditNoSync audit = new ActiveMQMessageAuditNoSync();

      byte[] bytes = serialize(audit);
      LOG.debug("Length: {}", bytes.length);
      audit = recover(bytes);

      List<MessageReference> list = new ArrayList<>();

      for (int j = 0; j < 1000; j++) {
         ProducerId pid = new ProducerId();
         pid.setConnectionId("test");
         pid.setSessionId(0);
         pid.setValue(j);
         LOG.debug("producer {}", j);

         for (int i = 0; i < 1000; i++) {
            MessageId id = new MessageId();
            id.setProducerId(pid);
            id.setProducerSequenceId(i);
            ActiveMQMessage msg = new ActiveMQMessage();
            msg.setMessageId(id);
            list.add(msg);
            assertFalse(audit.isDuplicate(msg.getMessageId().toString()));

            if (i % 100 == 0) {
               bytes = serialize(audit);
               LOG.debug("Length: {}", bytes.length);
               audit = recover(bytes);
            }

            if (i % 250 == 0) {
               for (MessageReference message : list) {
                  audit.rollback(message.getMessageId().toString());
               }
               list.clear();
               bytes = serialize(audit);
               LOG.debug("Length: {}", bytes.length);
               audit = recover(bytes);
            }
         }
      }
   }

   protected byte[] serialize(ActiveMQMessageAuditNoSync audit) throws Exception {
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      ObjectOutputStream oout = new ObjectOutputStream(baos);
      oout.writeObject(audit);
      oout.flush();
      return baos.toByteArray();
   }

   protected ActiveMQMessageAuditNoSync recover(byte[] bytes) throws Exception {
      ObjectInputStream objectIn = new ObjectInputStream(new ByteArrayInputStream(bytes));
      return (ActiveMQMessageAuditNoSync) objectIn.readObject();
   }
}
