/*
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package org.mule.runtime.core;

import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static org.junit.Assert.assertEquals;
import static org.mule.runtime.core.api.context.notification.ServerNotification.TYPE_ERROR;
import static org.mule.runtime.core.context.notification.ExceptionNotification.EXCEPTION_ACTION;

import org.mule.runtime.core.api.MuleContext;
import org.mule.runtime.core.api.context.notification.ExceptionNotificationListener;
import org.mule.runtime.core.context.notification.ExceptionNotification;
import org.mule.runtime.core.exception.DefaultSystemExceptionStrategy;
import org.mule.tck.junit4.AbstractMuleContextTestCase;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicInteger;

import org.junit.Test;

public class DefaultExceptionStrategyTestCase extends AbstractMuleContextTestCase {

  // MULE-1404
  @Test
  public void testExceptions() throws Exception {
    InstrumentedExceptionStrategy strategy = new InstrumentedExceptionStrategy(muleContext);
    strategy.setMuleContext(muleContext);
    strategy.handleException(new IllegalArgumentException("boom"));
    assertEquals(1, strategy.getCount());
  }

  // MULE-1627
  @Test
  public void testExceptionNotifications() throws Exception {
    final CountDownLatch latch = new CountDownLatch(1);
    final AtomicInteger notificationCount = new AtomicInteger(0);

    muleContext.registerListener((ExceptionNotificationListener<ExceptionNotification>) notification -> {
      if (notification.getAction() == EXCEPTION_ACTION) {
        assertEquals("exception", notification.getActionName());
        assertEquals("Wrong info type", TYPE_ERROR, notification.getType());
        notificationCount.incrementAndGet();
        latch.countDown();
      }
    });

    // throwing exception
    InstrumentedExceptionStrategy strategy = new InstrumentedExceptionStrategy(muleContext);
    strategy.setMuleContext(muleContext);
    strategy.handleException(new IllegalArgumentException("boom"));

    // Wait for the notifcation event to be fired as they are queue
    latch.await(2000, MILLISECONDS);
    assertEquals(1, notificationCount.get());

  }

  private static class InstrumentedExceptionStrategy extends DefaultSystemExceptionStrategy {

    private volatile int count = 0;

    public InstrumentedExceptionStrategy(MuleContext muleContext) {
      super();
    }

    @Override
    public void handleException(Exception exception) {
      count++;
      super.handleException(exception);
    }

    public int getCount() {
      return count;
    }
  }
}