/*
 *
 * Copyright (c) 2006 The Apache Software Foundation
 *
 * Licensed 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.qpid.server.queue;

import junit.framework.TestCase;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.BasicPublishBody;
import org.apache.qpid.framing.ContentHeaderBody;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.server.AMQChannel;
import org.apache.qpid.server.RequiredDeliveryException;
import org.apache.qpid.server.txn.TransactionalContext;
import org.apache.qpid.server.txn.NonTransactionalContext;
import org.apache.qpid.server.store.MessageStore;
import org.apache.qpid.server.store.SkeletonMessageStore;
import org.apache.qpid.server.store.StoreContext;

import javax.management.JMException;
import java.util.LinkedList;
import java.util.HashSet;

/**
 * Test class to test AMQQueueMBean attribtues and operations
 */
public class AMQQueueMBeanTest extends TestCase
{
    private AMQQueue _queue;
    private AMQQueueMBean _queueMBean;
    private QueueRegistry _queueRegistry;
    private MessageStore _messageStore = new SkeletonMessageStore();
    private StoreContext _storeContext = new StoreContext();
    private TransactionalContext _transactionalContext = new NonTransactionalContext(_messageStore, _storeContext,
                                                                                     null,
                                                                                     new LinkedList<RequiredDeliveryException>(),
                                                                                     new HashSet<Long>());
    private MockProtocolSession _protocolSession;
    private AMQChannel _channel;

    public void testMessageCount() throws Exception
    {
        int messageCount = 10;
        sendMessages(messageCount);
        assertTrue(_queueMBean.getMessageCount() == messageCount);
        assertTrue(_queueMBean.getReceivedMessageCount() == messageCount);
        assertTrue(_queueMBean.getQueueDepth() == 10);

        _queueMBean.deleteMessageFromTop();
        assertTrue(_queueMBean.getMessageCount() == messageCount - 1);
        assertTrue(_queueMBean.getReceivedMessageCount() == messageCount);

        _queueMBean.clearQueue();
        assertTrue(_queueMBean.getMessageCount() == 0);
        assertTrue(_queueMBean.getReceivedMessageCount() == messageCount);
    }

    public void testConsumerCount() throws Exception
    {
        SubscriptionManager mgr = _queue.getSubscribers();
        assertFalse(mgr.hasActiveSubscribers());
        assertTrue(_queueMBean.getActiveConsumerCount() == 0);

        _channel = new AMQChannel(1, _messageStore, null);
        _protocolSession = new MockProtocolSession(_messageStore);
        _protocolSession.addChannel(_channel);

        _queue.registerProtocolSession(_protocolSession, 1, new AMQShortString("test"), false, null);
        assertTrue(_queueMBean.getActiveConsumerCount() == 1);

        SubscriptionSet _subscribers = (SubscriptionSet) mgr;
        SubscriptionTestHelper s1 = new SubscriptionTestHelper("S1");
        SubscriptionTestHelper s2 = new SubscriptionTestHelper("S2");
        _subscribers.addSubscriber(s1);
        _subscribers.addSubscriber(s2);
        assertTrue(_queueMBean.getActiveConsumerCount() == 3);
        assertTrue(_queueMBean.getConsumerCount() == 3);

        s1.setSuspended(true);
        assertTrue(_queueMBean.getActiveConsumerCount() == 2);
        assertTrue(_queueMBean.getConsumerCount() == 3);
    }

    public void testGeneralProperties()
    {
        _queueMBean.setMaximumMessageCount(50000);
        _queueMBean.setMaximumMessageSize(2000l);
        _queueMBean.setMaximumQueueDepth(1000l);

        assertTrue(_queueMBean.getMaximumMessageCount() == 50000);
        assertTrue(_queueMBean.getMaximumMessageSize() == 2000);
        assertTrue(_queueMBean.getMaximumQueueDepth() == 1000);

        assertTrue(_queueMBean.getName().equals("testQueue"));
        assertTrue(_queueMBean.getOwner().equals("AMQueueMBeanTest"));
        assertFalse(_queueMBean.isAutoDelete());
        assertFalse(_queueMBean.isDurable());
    }

    public void testExceptions() throws Exception
    {
        try
        {
            _queueMBean.viewMessages(0, 3);
            fail();
        }
        catch (JMException ex)
        {

        }

        try
        {
            _queueMBean.viewMessages(2, 1);
            fail();
        }
        catch (JMException ex)
        {

        }

        try
        {
            _queueMBean.viewMessages(-1, 1);
            fail();
        }
        catch (JMException ex)
        {

        }

        AMQMessage msg = message(false);
        long id = msg.getMessageId();
        _queue.clearQueue(_storeContext);
        _queue.process(_storeContext, msg);
        msg.routingComplete(_messageStore, _storeContext, new MessageHandleFactory());
        _queueMBean.viewMessageContent(id);
        try
        {
            _queueMBean.viewMessageContent(id + 1);
            fail();
        }
        catch (JMException ex)
        {

        }
    }

    private AMQMessage message(boolean immediate) throws AMQException
    {
        // AMQP version change: Hardwire the version to 0-8 (major=8, minor=0)
        // TODO: Establish some way to determine the version for the test.
        BasicPublishBody publish = new BasicPublishBody((byte)8,
                                                        (byte)0,
                                                        null,
                                                        immediate,
                                                        false,
                                                        null,
                                                        0);
        
        ContentHeaderBody contentHeaderBody = new ContentHeaderBody();
        contentHeaderBody.bodySize = 1000;   // in bytes
        return new AMQMessage(_messageStore.getNewMessageId(), publish, _transactionalContext, contentHeaderBody);
    }

    @Override
    protected void setUp() throws Exception
    {
        super.setUp();
        _queueRegistry = new DefaultQueueRegistry();
        _queue = new AMQQueue(new AMQShortString("testQueue"), false, new AMQShortString("AMQueueMBeanTest"), false, _queueRegistry);
        _queueMBean = new AMQQueueMBean(_queue);
    }

    private void sendMessages(int messageCount) throws AMQException
    {
        AMQMessage[] messages = new AMQMessage[messageCount];
        for (int i = 0; i < messages.length; i++)
        {
            messages[i] = message(false);
        }
        for (int i = 0; i < messageCount; i++)
        {
            _queue.process(_storeContext, messages[i]);
        }

        for (int i = 0; i < messages.length; i++)
        {
            messages[i].routingComplete(_messageStore, _storeContext, new MessageHandleFactory());
        }
    }
}