/*
 * Copyright 2012  Research Studios Austria Forschungsges.m.b.H.
 *
 *    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 won.bot.framework.events;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import won.bot.framework.eventbot.bus.impl.AsyncEventBusImpl;
import won.bot.framework.eventbot.event.Event;
import won.bot.framework.eventbot.listener.EventListener;

import java.util.concurrent.CountDownLatch;

/**
 * User: fkleedorfer
 * Date: 30.01.14
 */
public class EventBusTests
{
  private Logger logger = LoggerFactory.getLogger(getClass());
  private ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();

  @Before
  public void setup(){
    taskScheduler.initialize();
  }

  @After
  public void tearDown(){
    taskScheduler.shutdown();
  }


  @Test
  public void testEventBusSimpleCase() throws InterruptedException
  {
    AsyncEventBusImpl bus = new AsyncEventBusImpl(this.taskScheduler);
    CountDownLatch countDownLatch = new CountDownLatch(9);
    bus.subscribe(TestEventA.class, new ListenerA(countDownLatch));
    bus.subscribe(TestEventB.class, new ListenerB(countDownLatch));
    bus.subscribe(TestEventB.class, new ListenerB(countDownLatch));
    bus.publish(new TestEventA());
    bus.publish(new TestEventB());
    bus.publish(new TestEventA());
    bus.publish(new TestEventB());
    bus.publish(new TestEventA());
    bus.publish(new TestEventB());
    countDownLatch.await();
  }

  private class TestEventA implements Event
  {
    @Override
    public String toString()
    {
      return "TestEventA";
    }
  }

  private class TestEventB implements Event{
    @Override
    public String toString()
    {
      return "TestEventB";
    }
  }

  private class ListenerA implements EventListener
  {
    private final CountDownLatch countDownLatch;

    public ListenerA(final CountDownLatch countDownLatch)
    {
      this.countDownLatch = countDownLatch;
    }
    @Override
    public void onEvent(final Event event) throws Exception
    {
      logger.debug("ListenerA: processing event {}", event);
      countDownLatch.countDown();
    }
  }

  private class ListenerB implements EventListener{
    private final CountDownLatch countDownLatch;

    public ListenerB(final CountDownLatch countDownLatch)
    {
      this.countDownLatch = countDownLatch;
    }

    @Override
    public void onEvent(final Event event) throws Exception
    {
      logger.debug("ListenerB: processing event {}", event);
      countDownLatch.countDown();
    }
  }
}