package org.jboss.resteasy.test.providers.sse;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.sse.InboundSseEvent;
import javax.ws.rs.sse.SseEventSource;

import org.hamcrest.CoreMatchers;
import org.hamcrest.MatcherAssert;
import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.container.test.api.RunAsClient;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.logging.Logger;
import org.jboss.resteasy.test.providers.sse.resource.SseSmokeResource;
import org.jboss.resteasy.utils.PortProviderUtil;
import org.jboss.resteasy.utils.TestUtil;
import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.spec.WebArchive;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;

@RunWith(Arquillian.class)
@RunAsClient
public class SseEventSourceTest {
   private static final Logger logger = Logger.getLogger(SseEventSourceTest.class);

   @Deployment
   public static Archive<?> deploy() {
      WebArchive war = TestUtil.prepareArchive(SseEventSourceTest.class.getSimpleName());
      return TestUtil.finishContainerPrepare(war, null, SseSmokeResource.class);
   }

   private String generateURL(String path) {
      return PortProviderUtil.generateURL(path, SseEventSourceTest.class.getSimpleName());
   }

   /**
    * @tpTestDetails Test `SseEventSource.register(Consumer<InboundSseEvent> onEvent)`
    * @tpInfo RESTEASY-1680
    * @tpSince RESTEasy 3.5.0
    */
   @Test
   public void testSseEventSourceOnEventCallback() throws Exception {
      final CountDownLatch latch = new CountDownLatch(1);
      final List<InboundSseEvent> results = new ArrayList<InboundSseEvent>();
      Client client = ClientBuilder.newBuilder().build();
      try {
         WebTarget target = client.target(generateURL("/sse/eventssimple"));
         SseEventSource msgEventSource = SseEventSource.target(target).build();
         try (SseEventSource eventSource = msgEventSource) {
            eventSource.register(event -> {
               results.add(event);
               latch.countDown();
            });
            eventSource.open();

            boolean waitResult = latch.await(30, TimeUnit.SECONDS);
            Assert.assertTrue("Waiting for event to be delivered has timed out.", waitResult);
         }
         Assert.assertEquals("One message was expected.", 1, results.size());
         MatcherAssert.assertThat("The message doesn't have expected content.", "data",
               CoreMatchers.is(CoreMatchers.equalTo(results.get(0).readData(String.class))));
      } finally {
         client.close();
      }
   }

   /**
    * @tpTestDetails Test `SseEventSource.register(Consumer<InboundSseEvent> onEvent, Consumer<Throwable> onError)`
    * @tpInfo RESTEASY-1680
    * @tpSince RESTEasy 3.5.0
    */
   @Test
   public void testSseEventSourceOnEventOnErrorCallback() throws Exception {
      final CountDownLatch latch = new CountDownLatch(1);
      final List<InboundSseEvent> results = new ArrayList<InboundSseEvent>();
      final AtomicInteger errors = new AtomicInteger(0);
      Client client = ClientBuilder.newBuilder().build();
      try {
         WebTarget target = client.target(generateURL("/sse/eventssimple"));
         SseEventSource msgEventSource = SseEventSource.target(target).build();
         try (SseEventSource eventSource = msgEventSource) {
            eventSource.register(event -> {
               results.add(event);
               latch.countDown();
            }, ex -> {
                  errors.incrementAndGet();
                  logger.error(ex.getMessage(), ex);
                  throw new RuntimeException(ex);
               });
            eventSource.open();

            boolean waitResult = latch.await(30, TimeUnit.SECONDS);
            Assert.assertTrue("Waiting for event to be delivered has timed out.", waitResult);
         }
         Assert.assertEquals("One message was expected.", 1, results.size());
         MatcherAssert.assertThat("The message doesn't have expected content.", "data",
               CoreMatchers.is(CoreMatchers.equalTo(results.get(0).readData(String.class))));
      } finally {
         client.close();
      }
   }

   /**
    * @tpTestDetails Test `SseEventSource.register(Consumer<InboundSseEvent> onEvent, Consumer<Throwable> onError, Runnable onComplete)`
    * @tpInfo RESTEASY-1680
    * @tpSince RESTEasy 3.5.0
    */
   @Test
   public void testSseEventSourceOnEventOnErrorOnCompleteCallback() throws Exception {
      final CountDownLatch latch = new CountDownLatch(1);
      final List<InboundSseEvent> results = new ArrayList<InboundSseEvent>();
      final AtomicInteger errors = new AtomicInteger(0);
      final AtomicInteger completed = new AtomicInteger(0);
      Client client = ClientBuilder.newBuilder().build();
      try {
         WebTarget target = client.target(generateURL("/sse/eventssimple"));
         SseEventSource msgEventSource = SseEventSource.target(target).build();
         try (SseEventSource eventSource = msgEventSource) {
            eventSource.register(event -> {
                results.add(event);
                latch.countDown();
            }, ex -> {
                  errors.incrementAndGet();
                  logger.error(ex.getMessage(), ex);
                  throw new RuntimeException(ex);
               }, () -> {
                     completed.incrementAndGet();
                  });
            eventSource.open();

            boolean waitResult = latch.await(30, TimeUnit.SECONDS);
            Assert.assertTrue("Waiting for event to be delivered has timed out.", waitResult);
         }
         Assert.assertEquals(0, errors.get());
         Assert.assertEquals("One message was expected.", 1, results.size());
         MatcherAssert.assertThat("The message doesn't have expected content.", "data",
               CoreMatchers.is(CoreMatchers.equalTo(results.get(0).readData(String.class))));
         Assert.assertEquals("On complete callback should be called one time", 1, completed.get());
      } finally {
         client.close();
      }
   }


   @Test
   public void testSseEventSourceCountDownOnCompleteCallback() throws Exception {
      final CountDownLatch latch = new CountDownLatch(1);
      final List<InboundSseEvent> results = new ArrayList<InboundSseEvent>();
      final AtomicInteger errors = new AtomicInteger(0);
      final AtomicInteger completed = new AtomicInteger(0);
      Client client = ClientBuilder.newBuilder().build();
      try {
         WebTarget target = client.target(generateURL("/sse/eventssimple"));
         SseEventSource msgEventSource = SseEventSource.target(target).build();
         try (SseEventSource eventSource = msgEventSource) {
            eventSource.register(event -> {
                results.add(event);
                latch.countDown();
            }, ex -> {
                  errors.incrementAndGet();
                  logger.error(ex.getMessage(), ex);
                  throw new RuntimeException(ex);
               }, () -> {
                  completed.incrementAndGet();
               });
            eventSource.open();

            boolean waitResult = latch.await(30, TimeUnit.SECONDS);
            if ((!waitResult) && (results.size() != 1)) {
               Assert.assertEquals("Waiting has timed out and only one message was expected.", 1, results.size());
            }

         }
         Assert.assertTrue("Waiting for onComplete has timed out.", completed.get() > 0);
         Assert.assertEquals(0, errors.get());
         Assert.assertEquals("One message was expected.", 1, results.size());
         MatcherAssert.assertThat("The message doesn't have expected content.", "data",
               CoreMatchers.is(CoreMatchers.equalTo(results.get(0).readData(String.class))));
         Assert.assertEquals("On complete callback should be called one time", 1, completed.get());
      } finally {
         client.close();
      }
   }

}
