/*
 * 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.artemis.tests.stress.remote;

import java.lang.invoke.MethodHandles;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import org.apache.activemq.artemis.api.core.Interceptor;
import org.apache.activemq.artemis.api.core.client.ClientSession;
import org.apache.activemq.artemis.api.core.client.ClientSessionFactory;
import org.apache.activemq.artemis.api.core.client.ServerLocator;
import org.apache.activemq.artemis.core.protocol.core.impl.PacketImpl;
import org.apache.activemq.artemis.core.server.ActiveMQServer;
import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
import org.apache.activemq.artemis.utils.RandomUtil;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static org.junit.jupiter.api.Assertions.assertTrue;

public class PingStressTest extends ActiveMQTestBase {

   private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

   private static final long PING_INTERVAL = 500;

   private ActiveMQServer server;

   @Override
   @BeforeEach
   public void setUp() throws Exception {
      super.setUp();
      server = createServer(false, createDefaultNettyConfig());
      server.start();
   }

   protected int getNumberOfIterations() {
      return 20;
   }

   @Test
   public void testMultiThreadOpenAndCloses() throws Exception {
      for (int i = 0; i < getNumberOfIterations(); i++) {
         if (i > 0) {
            tearDown();
            setUp();
         }
         internalTest();
      }

   }

   /*
    * Test the client triggering failure due to no pong received in time
    */
   private void internalTest() throws Exception {
      Interceptor noPongInterceptor = (packet, conn) -> {
         PingStressTest.logger.info("In interceptor, packet is {}", packet.getType());
         if (packet.getType() == PacketImpl.PING) {
            PingStressTest.logger.info("Ignoring Ping packet.. it will be dropped");
            return false;
         } else {
            return true;
         }
      };

      server.getRemotingService().addIncomingInterceptor(noPongInterceptor);
      ServerLocator locator = createNettyNonHALocator().setClientFailureCheckPeriod(PingStressTest.PING_INTERVAL).setConnectionTTL((long) (PingStressTest.PING_INTERVAL * 1.5)).setCallTimeout(PingStressTest.PING_INTERVAL * 10);
      final ClientSessionFactory csf1 = createSessionFactory(locator);

      final int numberOfSessions = 1;
      final int numberOfThreads = 30;

      final CountDownLatch flagStart = new CountDownLatch(1);
      final CountDownLatch flagAligned = new CountDownLatch(numberOfThreads);

      class LocalThread extends Thread {

         Throwable failure;

         int threadNumber;

         LocalThread(final int i) {
            super("LocalThread i = " + i);
            threadNumber = i;
         }

         @Override
         public void run() {
            try {

               ServerLocator locator = createNettyNonHALocator().setClientFailureCheckPeriod(PingStressTest.PING_INTERVAL).setConnectionTTL((long) (PingStressTest.PING_INTERVAL * 1.5)).setCallTimeout(PingStressTest.PING_INTERVAL * 10);

               final ClientSessionFactory csf2 = createSessionFactory(locator);

               // Start all at once to make concurrency worst
               flagAligned.countDown();
               flagStart.await();
               for (int i = 0; i < numberOfSessions; i++) {
                  System.out.println(getName() + " Session = " + i);

                  ClientSession session;

                  // Sometimes we use the SessionFactory declared on this thread, sometimes the SessionFactory declared
                  // on the test, sharing it with other threads
                  // (playing a possible user behaviour where you share the Factories among threads, versus not sharing
                  // them)
                  if (RandomUtil.randomBoolean()) {
                     session = csf1.createSession(false, false, false);
                  } else {
                     session = csf2.createSession(false, false, false);
                  }

                  // We will wait to anything between 0 to PING_INTERVAL * 2
                  Thread.sleep(PingStressTest.PING_INTERVAL * (threadNumber % 3));

                  session.close();

                  csf2.close();

                  locator.close();
               }
            } catch (Throwable e) {
               e.printStackTrace();
               failure = e;
            }
         }
      }

      LocalThread[] threads = new LocalThread[numberOfThreads];

      for (int i = 0; i < numberOfThreads; i++) {
         threads[i] = new LocalThread(i);
         threads[i].start();
      }

      assertTrue(flagAligned.await(10, TimeUnit.SECONDS));
      flagStart.countDown();

      Throwable e = null;
      for (LocalThread t : threads) {
         t.join();
         if (t.failure != null) {
            e = t.failure;
         }
      }

      if (e != null) {
         throw new Exception("Test Failed", e);
      }

      csf1.close();

      locator.close();

   }
}
