/**
 * 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.ra;

import java.lang.reflect.Method;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import javax.jms.Session;
import javax.resource.spi.BootstrapContext;
import javax.resource.spi.endpoint.MessageEndpointFactory;
import javax.resource.spi.work.ExecutionContext;
import javax.resource.spi.work.Work;
import javax.resource.spi.work.WorkListener;
import javax.resource.spi.work.WorkManager;

import javax.transaction.xa.XAResource;
import junit.framework.TestCase;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQSession;
import org.apache.activemq.command.ActiveMQMessage;
import org.apache.activemq.command.ActiveMQTextMessage;
import org.apache.activemq.command.ConsumerId;
import org.apache.activemq.command.MessageDispatch;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.util.Wait;
import org.hamcrest.Description;
import org.jmock.Expectations;
import org.jmock.Mockery;
import org.jmock.api.Action;
import org.jmock.api.Invocation;
import org.jmock.integration.junit4.JMock;
import org.jmock.lib.legacy.ClassImposteriser;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 
 */
@RunWith(JMock.class)
public class ServerSessionImplTest extends TestCase {
    private static final Logger LOG = LoggerFactory.getLogger(ServerSessionImplTest.class);
    private static final String BROKER_URL = "vm://localhost?broker.persistent=false";
    private ServerSessionImpl serverSession;
    private ServerSessionPoolImpl pool;
    private WorkManager workManager;
    private MessageEndpointProxy messageEndpoint;
    private ActiveMQConnection con;
    private ActiveMQSession session;
    ActiveMQEndpointWorker endpointWorker;
    private Mockery context;
    @Before
    public void setUp() throws Exception
    {
        super.setUp();
        context = new Mockery() {{
            setImposteriser(ClassImposteriser.INSTANCE);
        }};
        
        org.apache.activemq.ActiveMQConnectionFactory factory = 
                new org.apache.activemq.ActiveMQConnectionFactory(BROKER_URL);
        con = (ActiveMQConnection) factory.createConnection();
        con.start();
        session = (ActiveMQSession) con.createSession(false, Session.AUTO_ACKNOWLEDGE);
    }

    @After
    public void tearDown() throws Exception {
        if (con != null) {
            con.close();
        }
    }

    @Test
    public void testRunDetectsStoppedSession() throws Exception {

        pool = context.mock(ServerSessionPoolImpl.class);
        workManager = context.mock(WorkManager.class);
        messageEndpoint = context.mock(MessageEndpointProxy.class);

        serverSession = new ServerSessionImpl(
                (ServerSessionPoolImpl) pool,
                session,
                (WorkManager) workManager,
                messageEndpoint,
                false,
                10);

        con.close();
        context.checking(new Expectations() {{
            oneOf (pool).removeFromPool(with(same(serverSession)));
        }});
        serverSession.run();
    }

    @Test
    public void testCloseCanStopActiveSession() throws Exception {

        final int maxMessages = 4000;
        final CountDownLatch messageCount = new CountDownLatch(maxMessages);

        final MessageEndpointFactory messageEndpointFactory = context.mock(MessageEndpointFactory.class);
        final MessageResourceAdapter resourceAdapter = context.mock(MessageResourceAdapter.class);
        final ActiveMQEndpointActivationKey key = context.mock(ActiveMQEndpointActivationKey.class);
        messageEndpoint = context.mock(MessageEndpointProxy.class);
        workManager = context.mock(WorkManager.class);
        final MessageActivationSpec messageActivationSpec = context.mock(MessageActivationSpec.class);
        final BootstrapContext boostrapContext = context.mock(BootstrapContext.class);
        context.checking(new Expectations() {{
            allowing(boostrapContext).getWorkManager(); will (returnValue(workManager));
            allowing(resourceAdapter).getBootstrapContext(); will (returnValue(boostrapContext));
            allowing(messageEndpointFactory).isDeliveryTransacted(with (any(Method.class))); will(returnValue(Boolean.FALSE));
            allowing(key).getMessageEndpointFactory();  will(returnValue(messageEndpointFactory));
            allowing(key).getActivationSpec(); will (returnValue(messageActivationSpec));
            allowing(messageActivationSpec).isUseJndi(); will (returnValue(Boolean.FALSE));
            allowing(messageActivationSpec).getDestinationType(); will (returnValue("javax.jms.Queue"));
            allowing(messageActivationSpec).getDestination(); will (returnValue("Queue"));
            allowing(messageActivationSpec).getAcknowledgeModeForSession(); will (returnValue(1));
            allowing(messageActivationSpec).getMaxSessionsIntValue(); will (returnValue(1));
            allowing(messageActivationSpec).getEnableBatchBooleanValue(); will (returnValue(Boolean.FALSE));
            allowing(messageActivationSpec).isUseRAManagedTransactionEnabled(); will (returnValue(Boolean.TRUE));
            allowing(messageEndpointFactory).createEndpoint(with (any(XAResource.class))); will (returnValue(messageEndpoint));

            allowing(workManager).scheduleWork((Work) with(anything()), (long) with(any(long.class)), with(any(ExecutionContext.class)), with(any(WorkListener.class)));
            will (new Action() {
                @Override
                public Object invoke(Invocation invocation) throws Throwable {
                    return null;
                }

                @Override
                public void describeTo(Description description) {
                }
            });

            allowing(messageEndpoint).beforeDelivery((Method) with(anything()));
            allowing (messageEndpoint).onMessage(with (any(javax.jms.Message.class))); will(new Action(){
                @Override
                public Object invoke(Invocation invocation) throws Throwable {
                    messageCount.countDown();
                    if (messageCount.getCount() < maxMessages - 11) {
                        TimeUnit.MILLISECONDS.sleep(200);
                    }
                    return null;
                }

                @Override
                public void describeTo(Description description) {
                    description.appendText("Keep message count");
                }
            });
            allowing(messageEndpoint).afterDelivery();
            allowing(messageEndpoint).release();

        }});

        endpointWorker = new ActiveMQEndpointWorker(resourceAdapter, key);
        endpointWorker.setConnection(con);
        pool = new ServerSessionPoolImpl(endpointWorker, 2);

        endpointWorker.start();
        final ServerSessionImpl serverSession1 = (ServerSessionImpl) pool.getServerSession();

        // preload the session dispatch queue to keep the session active
        ActiveMQSession session1 = (ActiveMQSession) serverSession1.getSession();
        for (int i=0; i<maxMessages; i++) {
            MessageDispatch messageDispatch = new  MessageDispatch();
            ActiveMQMessage message = new ActiveMQTextMessage();
            message.setMessageId(new MessageId("0:0:0:" + i));
            message.getMessageId().setBrokerSequenceId(i);
            messageDispatch.setMessage(message);
            messageDispatch.setConsumerId(new ConsumerId("0:0:0"));
            session1.dispatch(messageDispatch);
        }

        ExecutorService executorService = Executors.newCachedThreadPool();
        final CountDownLatch runState = new CountDownLatch(1);
        executorService.execute(new Runnable(){
            @Override
            public void run() {
                try {
                    serverSession1.run();
                    runState.countDown();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });

        Wait.waitFor(new Wait.Condition() {
            @Override
            public boolean isSatisified() throws Exception {
                return messageCount.getCount() < maxMessages - 10;
            }
        });
        assertTrue("some messages consumed", messageCount.getCount() < maxMessages);
        LOG.info("Closing pool on {}", messageCount.getCount());
        pool.close();

        assertTrue("run has completed", runState.await(20, TimeUnit.SECONDS));
        assertTrue("not all messages consumed", messageCount.getCount() > 0);
    }
}
