/**
 * 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.transport.vm;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import javax.jms.Connection;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
import org.apache.activemq.broker.BrokerRegistry;
import org.apache.activemq.broker.PublishedAddressPolicy;
import org.apache.activemq.broker.TransportConnector;
import org.apache.activemq.command.BrokerInfo;
import org.apache.activemq.transport.Transport;
import org.apache.activemq.transport.TransportFactory;
import org.apache.activemq.transport.TransportListener;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

public class VMTransportBrokerNameTest {

    private static final String MY_BROKER = "myBroker";
    final String vmUrl = "vm:(broker:(tcp://localhost:61616)/" + MY_BROKER + "?persistent=false)";

    @Test
    public void testBrokerName() throws Exception {
        ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory(new URI(vmUrl));
        ActiveMQConnection c1 = (ActiveMQConnection) cf.createConnection();
        assertTrue("Transport has name in it: " + c1.getTransport(), c1.getTransport().toString().contains(MY_BROKER));

        // verify Broker is there with name
        ActiveMQConnectionFactory cfbyName = new ActiveMQConnectionFactory(new URI("vm://" + MY_BROKER + "?create=false"));
        Connection c2 = cfbyName.createConnection();

        assertNotNull(BrokerRegistry.getInstance().lookup(MY_BROKER));
        assertEquals(BrokerRegistry.getInstance().findFirst().getBrokerName(), MY_BROKER);
        assertEquals(BrokerRegistry.getInstance().getBrokers().size(), 1);

        c1.close();
        c2.close();
    }

    @Test
    public void testPublishableAddressUri() throws Exception {

        PublishedAddressPolicy publishedAddressPolicy = new PublishedAddressPolicy();
        final AtomicReference<URI> uriAtomicReference = new AtomicReference<>();

        TransportConnector dummyTransportConnector = new TransportConnector() {
            @Override
            public URI getConnectUri() throws IOException, URISyntaxException {
                return uriAtomicReference.get();
            }
        };
        URI ok = new URI("vm://b1");
        uriAtomicReference.set(ok);
        assertEquals(uriAtomicReference.get(), publishedAddressPolicy.getPublishableConnectURI(dummyTransportConnector));

        ok = new URI("vm://b1?async=false");
        uriAtomicReference.set(ok);
        assertEquals(uriAtomicReference.get(), publishedAddressPolicy.getPublishableConnectURI(dummyTransportConnector));


        URI badHost = new URI("vm://b1_11");
        uriAtomicReference.set(badHost);
        assertEquals(uriAtomicReference.get(), publishedAddressPolicy.getPublishableConnectURI(dummyTransportConnector));

    }

    @Test
    public void testBrokerInfoReceiptClientAsync() throws Exception {

        ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory(new URI(vmUrl));
        ActiveMQConnection c1 = (ActiveMQConnection) cf.createConnection();

        final int numIterations = 400;
        final CountDownLatch successLatch = new CountDownLatch(numIterations);
        ExecutorService executor = Executors.newFixedThreadPool(100);
        for (int i = 0; i < numIterations; i++) {
            executor.submit(new Runnable() {
                @Override
                public void run() {
                    try {
                        verifyBrokerInfo(successLatch);
                    } catch (Exception ignored) {
                        ignored.printStackTrace();
                    }
                }
            });
        }

        executor.shutdown();
        executor.awaitTermination(20, TimeUnit.SECONDS);
        c1.close();

        assertTrue("all success: " + successLatch.getCount(), successLatch.await(1, TimeUnit.SECONDS));
    }

    public void verifyBrokerInfo(CountDownLatch success) throws Exception {
        final CountDownLatch gotBrokerInfo = new CountDownLatch(1);
        Transport transport = TransportFactory.connect(new URI("vm://" + MY_BROKER + "?async=false"));
        transport.setTransportListener(new TransportListener() {
            @Override
            public void onCommand(Object command) {
                if (command instanceof BrokerInfo) {
                    gotBrokerInfo.countDown();
                }
            }

            @Override
            public void onException(IOException error) {

            }

            @Override
            public void transportInterupted() {

            }

            @Override
            public void transportResumed() {

            }
        });
        transport.start();
        if (gotBrokerInfo.await(5, TimeUnit.SECONDS)) {
            success.countDown();
        }
        transport.stop();
    }
}