/**
 * 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.console.command;

import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Enumeration;
import java.util.List;

import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.QueueBrowser;
import javax.jms.QueueConnection;
import javax.jms.QueueRequestor;
import javax.jms.QueueSession;
import javax.jms.Session;
import javax.jms.TextMessage;
import javax.management.MBeanServerConnection;
import javax.management.MBeanServerInvocationHandler;
import javax.management.ObjectInstance;
import javax.management.ObjectName;

import junit.framework.TestCase;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.broker.jmx.QueueViewMBean;
import org.apache.activemq.console.CommandContext;
import org.apache.activemq.console.formatter.CommandShellOutputFormatter;
import org.apache.activemq.console.util.JmxMBeansUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class PurgeCommandTest extends TestCase {

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

   protected static final int MESSAGE_COUNT = 10;
   protected static final String PROPERTY_NAME = "XTestProperty";
   protected static final String PROPERTY_VALUE = "1:1";

   // check for existence of property
   protected static final String MSG_SEL_WITH_PROPERTY = PROPERTY_NAME + " is not null";

   // check for non-existence of property
   protected static final String MSG_SEL_WITHOUT_PROPERTY = PROPERTY_NAME + " is null";

   // complex message selector query using XTestProperty and JMSPriority
   protected static final String MSG_SEL_COMPLEX = PROPERTY_NAME + "='" +
      "1:1" + "',JMSPriority>3";

   // complex message selector query using XTestProperty AND JMSPriority
   // but in SQL-92 syntax
   protected static final String MSG_SEL_COMPLEX_SQL_AND = "(" + PROPERTY_NAME + "='" +
      "1:1" + "') AND (JMSPriority>3)";

   // complex message selector query using XTestProperty OR JMSPriority
   // but in SQL-92 syntax
   protected static final String MSG_SEL_COMPLEX_SQL_OR = "(" + PROPERTY_NAME + "='" +
      "1:1" + "') OR (JMSPriority>3)";

   protected static final String QUEUE_NAME = "org.apache.activemq.network.jms.QueueBridgeTest";

   protected AbstractApplicationContext context;
   protected QueueConnection localConnection;
   protected QueueRequestor requestor;
   protected QueueSession requestServerSession;
   protected MessageConsumer requestServerConsumer;
   protected MessageProducer requestServerProducer;
   protected Queue theQueue;

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

      context = createApplicationContext();

      createConnections();

      requestServerSession = localConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
      theQueue = requestServerSession.createQueue(QUEUE_NAME);
      requestServerConsumer = requestServerSession.createConsumer(theQueue);
      requestServerProducer = requestServerSession.createProducer(null);

      QueueSession session = localConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
      requestor = new QueueRequestor(session, theQueue);
   }

   protected void createConnections() throws JMSException {
      ActiveMQConnectionFactory fac = (ActiveMQConnectionFactory) context.getBean("localFactory");
      localConnection = fac.createQueueConnection();
      localConnection.start();
   }

   protected AbstractApplicationContext createApplicationContext() {
      return new ClassPathXmlApplicationContext("org/apache/activemq/console/command/activemq.xml");
   }

   @Override
   protected void tearDown() throws Exception {
      localConnection.close();
      BrokerService broker = (BrokerService) context.getBean("localbroker");
      broker.stop();
      broker = (BrokerService) context.getBean("default");
      broker.stop();
      super.tearDown();
   }

   public int getMessageCount(QueueBrowser browser, String prefix) throws JMSException {
      Enumeration<?> e = browser.getEnumeration();
      int with = 0;
      while (e.hasMoreElements()) {
         Object o = e.nextElement();
         System.out.println(prefix + o);
         with++;
      }
      return with;
   }

   public void cleanup() throws JMSException {
      for (int i = 0; i < MESSAGE_COUNT * 2; i++) {
         requestServerConsumer.receive();
      }
   }

   protected MBeanServerConnection createJmxConnection() throws IOException {
      return ManagementFactory.getPlatformMBeanServer();
   }

   public void purgeAllMessages() throws IOException, Exception {
      List<ObjectInstance> queueList = JmxMBeansUtil.queryMBeans(createJmxConnection(), "type=Broker,brokerName=localbroker,destinationType=Queue,destinationName=*");
      for (ObjectInstance oi : queueList) {
         ObjectName queueName = oi.getObjectName();
         LOG.info("Purging all messages in queue: " + queueName.getKeyProperty("Destination"));
         createJmxConnection().invoke(queueName, "purge", new Object[]{}, new String[]{});
      }
   }

   public void addMessages() throws IOException, Exception {
      // first clean out any messages that may exist.
      purgeAllMessages();

      for (int i = 0; i < MESSAGE_COUNT; i++) {
         TextMessage msg = requestServerSession.createTextMessage("test msg: " + i);
         msg.setStringProperty(PROPERTY_NAME, PROPERTY_VALUE);
         requestServerProducer.send(theQueue, msg);
      }
      for (int i = 0; i < MESSAGE_COUNT; i++) {
         TextMessage msg = requestServerSession.createTextMessage("test msg: " + i);
         requestServerProducer.send(theQueue, msg);
      }

   }

   public void validateCounts(int expectedWithCount,
                              int expectedWithoutCount,
                              int expectedAllCount) throws JMSException {
      QueueBrowser withPropertyBrowser = requestServerSession.createBrowser(theQueue, MSG_SEL_WITH_PROPERTY);
      QueueBrowser withoutPropertyBrowser = requestServerSession.createBrowser(theQueue, MSG_SEL_WITHOUT_PROPERTY);
      QueueBrowser allBrowser = requestServerSession.createBrowser(theQueue);

      int withCount = getMessageCount(withPropertyBrowser, "withProperty ");
      int withoutCount = getMessageCount(withoutPropertyBrowser, "withoutProperty ");
      int allCount = getMessageCount(allBrowser, "allMessages ");

      withPropertyBrowser.close();
      withoutPropertyBrowser.close();
      allBrowser.close();

      assertEquals("Expected withCount to be " + expectedWithCount + " was " + withCount, expectedWithCount, withCount);
      assertEquals("Expected withoutCount to be " + expectedWithoutCount + " was " + withoutCount, expectedWithoutCount, withoutCount);
      assertEquals("Expected allCount to be " + expectedAllCount + " was " + allCount, expectedAllCount, allCount);
      LOG.info("withCount = " + withCount + "\n withoutCount = " + withoutCount + "\n allCount = " + allCount + "\n  = " + "\n");
   }

   /**
    * This test ensures that the queueViewMbean will work.
    *
    * @throws Exception
    */
   public void testQueueViewMbean() throws Exception {

      try {
         addMessages();

         validateCounts(MESSAGE_COUNT, MESSAGE_COUNT, MESSAGE_COUNT * 2);

         List<String> tokens = Arrays.asList(new String[]{"*"});
         for (String token : tokens) {
            List<ObjectInstance> queueList = JmxMBeansUtil.queryMBeans(createJmxConnection(), "type=Broker,brokerName=localbroker,destinationType=Queue,destinationName=" + token);

            for (ObjectInstance queue : queueList) {
               ObjectName queueName = queue.getObjectName();
               QueueViewMBean proxy = MBeanServerInvocationHandler.newProxyInstance(createJmxConnection(), queueName, QueueViewMBean.class, true);
               int removed = proxy.removeMatchingMessages(MSG_SEL_WITH_PROPERTY);
               LOG.info("Removed: " + removed);
            }
         }

         validateCounts(0, MESSAGE_COUNT, MESSAGE_COUNT);

      }
      finally {
         purgeAllMessages();
      }
   }

   public void testPurgeCommandSimpleSelector() throws Exception {
      try {
         PurgeCommand purgeCommand = new PurgeCommand();
         CommandContext context = new CommandContext();

         context.setFormatter(new CommandShellOutputFormatter(System.out));

         purgeCommand.setCommandContext(context);
         purgeCommand.setJmxUseLocal(true);

         List<String> tokens = new ArrayList<>();
         tokens.add("--msgsel");
         tokens.add(MSG_SEL_WITH_PROPERTY);

         addMessages();
         validateCounts(MESSAGE_COUNT, MESSAGE_COUNT, MESSAGE_COUNT * 2);

         purgeCommand.execute(tokens);

         validateCounts(0, MESSAGE_COUNT, MESSAGE_COUNT);
      }
      finally {
         purgeAllMessages();
      }
   }

   public void testPurgeCommandComplexSelector() throws Exception {
      try {
         PurgeCommand purgeCommand = new PurgeCommand();
         CommandContext context = new CommandContext();

         context.setFormatter(new CommandShellOutputFormatter(System.out));

         purgeCommand.setCommandContext(context);
         purgeCommand.setJmxUseLocal(true);

         List<String> tokens = new ArrayList<>();
         tokens.add("--msgsel");
         tokens.add(MSG_SEL_COMPLEX);

         addMessages();
         validateCounts(MESSAGE_COUNT, MESSAGE_COUNT, MESSAGE_COUNT * 2);

         purgeCommand.execute(tokens);

         QueueBrowser withPropertyBrowser = requestServerSession.createBrowser(theQueue, MSG_SEL_COMPLEX);
         QueueBrowser allBrowser = requestServerSession.createBrowser(theQueue);

         int withCount = getMessageCount(withPropertyBrowser, "withProperty ");
         int allCount = getMessageCount(allBrowser, "allMessages ");

         withPropertyBrowser.close();
         allBrowser.close();

         assertEquals("Expected withCount to be " + "0" + " was " + withCount, 0, withCount);
         assertEquals("Expected allCount to be " + MESSAGE_COUNT + " was " + allCount, MESSAGE_COUNT, allCount);
         LOG.info("withCount = " + withCount + "\n allCount = " +
                     allCount + "\n  = " + "\n");
      }
      finally {
         purgeAllMessages();
      }
   }

   public void testPurgeCommandComplexSQLSelector_AND() throws Exception {
      try {

         String one = "ID:mac.fritz.box:1213242.3231.1:1:1:100";
         String two = "\\*:100";
         try {
            if (one.matches(two))
               LOG.info("String matches.");
            else
               LOG.info("string does not match.");
         }
         catch (Exception ex) {
            LOG.error(ex.getMessage());
         }

         PurgeCommand purgeCommand = new PurgeCommand();
         CommandContext context = new CommandContext();

         context.setFormatter(new CommandShellOutputFormatter(System.out));

         purgeCommand.setCommandContext(context);
         purgeCommand.setJmxUseLocal(true);

         List<String> tokens = new ArrayList<>();
         tokens.add("--msgsel");
         tokens.add(MSG_SEL_COMPLEX_SQL_AND);

         addMessages();
         validateCounts(MESSAGE_COUNT, MESSAGE_COUNT, MESSAGE_COUNT * 2);

         purgeCommand.execute(tokens);

         QueueBrowser withPropertyBrowser = requestServerSession.createBrowser(theQueue, MSG_SEL_COMPLEX_SQL_AND);
         QueueBrowser allBrowser = requestServerSession.createBrowser(theQueue);

         int withCount = getMessageCount(withPropertyBrowser, "withProperty ");
         int allCount = getMessageCount(allBrowser, "allMessages ");

         withPropertyBrowser.close();
         allBrowser.close();

         assertEquals("Expected withCount to be " + "0" + " was " + withCount, 0, withCount);
         assertEquals("Expected allCount to be " + MESSAGE_COUNT + " was " + allCount, MESSAGE_COUNT, allCount);
         LOG.info("withCount = " + withCount + "\n allCount = " +
                     allCount + "\n  = " + "\n");
      }
      finally {
         purgeAllMessages();
      }
   }

   public void testPurgeCommandComplexSQLSelector_OR() throws Exception {
      try {
         PurgeCommand purgeCommand = new PurgeCommand();
         CommandContext context = new CommandContext();

         context.setFormatter(new CommandShellOutputFormatter(System.out));

         purgeCommand.setCommandContext(context);
         purgeCommand.setJmxUseLocal(true);

         List<String> tokens = new ArrayList<>();
         tokens.add("--msgsel");
         tokens.add(MSG_SEL_COMPLEX_SQL_OR);

         addMessages();
         validateCounts(MESSAGE_COUNT, MESSAGE_COUNT, MESSAGE_COUNT * 2);

         purgeCommand.execute(tokens);

         QueueBrowser withPropertyBrowser = requestServerSession.createBrowser(theQueue, MSG_SEL_COMPLEX_SQL_OR);
         QueueBrowser allBrowser = requestServerSession.createBrowser(theQueue);

         int withCount = getMessageCount(withPropertyBrowser, "withProperty ");
         int allCount = getMessageCount(allBrowser, "allMessages ");

         withPropertyBrowser.close();
         allBrowser.close();

         assertEquals("Expected withCount to be 0 but was " + withCount, 0, withCount);
         assertEquals("Expected allCount to be 0 but was " + allCount, 0, allCount);
         LOG.info("withCount = " + withCount + "\n allCount = " +
                     allCount + "\n  = " + "\n");
      }
      finally {
         purgeAllMessages();
      }
   }

   public void testDummy() throws Exception {
      try {

         String one = "ID:mac.fritz.box:1213242.3231.1:1:1:100";
         String two = "ID*:100";
         try {
            if (one.matches(two))
               LOG.info("String matches.");
            else
               LOG.info("string does not match.");
         }
         catch (Exception ex) {
            LOG.error(ex.getMessage());
         }

         PurgeCommand purgeCommand = new PurgeCommand();
         CommandContext context = new CommandContext();

         context.setFormatter(new CommandShellOutputFormatter(System.out));

         purgeCommand.setCommandContext(context);
         purgeCommand.setJmxUseLocal(true);

         List<String> tokens = new ArrayList<>();
         tokens.add("--msgsel");
         tokens.add("(XTestProperty LIKE '1:*') AND (JMSPriority>3)");

         addMessages();

         purgeCommand.execute(tokens);

            /*
            QueueBrowser withPropertyBrowser = requestServerSession.createBrowser(
                    theQueue, MSG_SEL_COMPLEX_SQL_AND);
            QueueBrowser allBrowser = requestServerSession.createBrowser(theQueue);

            int withCount = getMessageCount(withPropertyBrowser, "withProperty ");
            int allCount = getMessageCount(allBrowser, "allMessages ");

            withPropertyBrowser.close();
            allBrowser.close();

            assertEquals("Expected withCount to be " + "0" + " was "
                    + withCount, 0, withCount);
            assertEquals("Expected allCount to be " + MESSAGE_COUNT + " was "
                    + allCount, MESSAGE_COUNT, allCount);
            LOG.info("withCount = " + withCount + "\n allCount = " +
                    allCount + "\n  = " + "\n");
            */
      }
      finally {
         purgeAllMessages();
      }
   }

}
