/**
 * 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.pool;

import org.apache.activemq.broker.BrokerPlugin;
import org.apache.activemq.broker.BrokerService;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.filter.DestinationMap;
import org.apache.activemq.jaas.GroupPrincipal;
import org.apache.activemq.security.AuthenticationUser;
import org.apache.activemq.security.AuthorizationPlugin;
import org.apache.activemq.security.SimpleAuthenticationPlugin;
import org.apache.activemq.security.SimpleAuthorizationMap;
import org.apache.activemq.util.Wait;
import org.junit.After;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

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

public class PooledConsumerTest {

    private static final Logger LOGGER = LoggerFactory.getLogger(PooledConsumerTest.class);

    public static final String USERNAME = "test";
    public static final String PASSWORD = "test";
    private static final ActiveMQQueue QUEUE = new ActiveMQQueue("TEST");

    BrokerService brokerService;


    class PooledConsumer implements MessageListener {

        private ConnectionFactory factory;
        private Connection connection;
        public boolean done = false;

        public PooledConsumer(String url) throws JMSException {
            org.apache.activemq.pool.PooledConnectionFactory factory = new org.apache.activemq.pool.PooledConnectionFactory(url);
            factory.setMaxConnections(5);
            factory.setIdleTimeout(0);
            this.factory = factory;
            init();
        }

        private void init() throws JMSException {
            if (connection != null) {
                close();
            }
            connection = factory.createConnection(USERNAME, PASSWORD);
            connection.start();
        }

        public void listen() {
            Session session = null;
            MessageConsumer consumer = null;
            boolean success = true;
            while (!done) {
                try {
                    session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
                    consumer = session.createConsumer(QUEUE);
                    onMessage(consumer.receive());
                    success = true;
                } catch (JMSException e) {
                    LOGGER.info(e.getMessage());
                    success = false;
                } finally {
                    try {
                        if (consumer != null) consumer.close();
                        if (session != null) session.close();
                        if (!success) init();
                    } catch (JMSException ignore) {
                        ignore.printStackTrace();
                    }
                }
                sleep(50);
            }
        }

        private void sleep(long milliseconds) {
            try {
                TimeUnit.MILLISECONDS.sleep(milliseconds);
            } catch (InterruptedException e) {
            }
        }

        @Override
        public void onMessage(Message message) {
            if (message != null) {
                TextMessage textMessage = (TextMessage) message;
                try {
                    String response = textMessage.getText();
                    LOGGER.info("Received: '{}'", response);
                } catch (Exception e) {
                    LOGGER.error(e.getMessage(), e);
                }
            }
        }

        public void close() {
            try {
                if (connection != null) {
                    connection.close();
                }
            } catch (JMSException e) {
            }
        }

        public void done() {
            done = true;
            close();
        }
    }

    public void startBroker(String group, String trasport) throws Exception {
        brokerService = new BrokerService();
        brokerService.addConnector(trasport);
        brokerService.setPersistent(false);
        brokerService.setUseJmx(false);
        brokerService.setAdvisorySupport(false);
        brokerService.setDestinations(new ActiveMQDestination[]{QUEUE});

        List<AuthenticationUser> users = new ArrayList<>();
        users.add(new AuthenticationUser("test", "test", group));
        SimpleAuthenticationPlugin authenticationPlugin = new SimpleAuthenticationPlugin(users);

        AuthorizationPlugin authorizationPlugin = new AuthorizationPlugin();
        SimpleAuthorizationMap simpleAuthorizationMap = new SimpleAuthorizationMap();
        DestinationMap readAcls = new DestinationMap();
        GroupPrincipal USERS = new GroupPrincipal("users");

        readAcls.put(QUEUE, USERS);
        simpleAuthorizationMap.setReadACLs(readAcls);
        authorizationPlugin.setMap(simpleAuthorizationMap);
        BrokerPlugin[] plugins = new BrokerPlugin[]{authenticationPlugin, authorizationPlugin};
        brokerService.setPlugins(plugins);

        brokerService.start();
    }

    @After
    public void stopBroker() throws Exception {
        if (brokerService != null) {
            brokerService.stop();
            brokerService.waitUntilStopped();
        }
    }

    @Test
    public void testFailedConsumerNotRetainedByFailover() throws Exception {
        startBroker("test", "tcp://0.0.0.0:0");
        String url = brokerService.getTransportConnectorByScheme("tcp").getPublishableConnectString();
        final PooledConsumer consumer = new PooledConsumer("failover:(" + brokerService.getTransportConnectorByScheme("tcp").getPublishableConnectString() + ")?jms.watchTopicAdvisories=false");

        ExecutorService executorService = Executors.newSingleThreadExecutor();
        executorService.execute(new Runnable() {
            @Override
            public void run() {
                consumer.listen();
            }
        });

        assertTrue("5 connectons - pool fils up", Wait.waitFor(new Wait.Condition() {
            @Override
            public boolean isSatisified() throws Exception {
                return 5 == brokerService.getTransportConnectorByScheme("tcp").getConnections().size();
            }
        }));

        stopBroker();

        // with perms
        startBroker("users", url);

        assertTrue("5 reconnections from the pool", Wait.waitFor(new Wait.Condition() {
            @Override
            public boolean isSatisified() throws Exception {
                return 5 == brokerService.getTransportConnectorByScheme("tcp").getConnections().size();
            }
        }));

        assertEquals("one consumer", 1, brokerService.getRegionBroker().getDestinationMap().get(QUEUE).getConsumers().size());

        consumer.done();
        executorService.shutdownNow();
    }

}