/*
 * Copyright 2002-2013 the original author or authors.
 *
 * 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 org.springframework.messaging.simp.config;

import java.util.Arrays;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.SubscribableChannel;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.simp.stomp.StompCommand;
import org.springframework.messaging.simp.stomp.StompTextMessageBuilder;
import org.springframework.messaging.support.channel.ExecutorSubscribableChannel;
import org.springframework.stereotype.Controller;
import org.springframework.web.socket.AbstractWebSocketIntegrationTests;
import org.springframework.web.socket.JettyWebSocketTestServer;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.TomcatWebSocketTestServer;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.adapter.TextWebSocketHandlerAdapter;
import org.springframework.web.socket.client.endpoint.StandardWebSocketClient;
import org.springframework.web.socket.client.jetty.JettyWebSocketClient;
import org.springframework.web.socket.server.HandshakeHandler;
import org.springframework.web.socket.server.config.WebSocketConfigurationSupport;
import org.springframework.web.socket.sockjs.transport.handler.WebSocketTransportHandler;

import static org.junit.Assert.*;


/**
 * Test fixture for {@link WebSocketConfigurationSupport}.
 *
 * @author Rossen Stoyanchev
 */
@RunWith(Parameterized.class)
public class WebSocketMessageBrokerConfigurationTests extends AbstractWebSocketIntegrationTests {

	@Parameters
	public static Iterable<Object[]> arguments() {
		return Arrays.asList(new Object[][] {
				{new JettyWebSocketTestServer(), new JettyWebSocketClient()},
				{new TomcatWebSocketTestServer(), new StandardWebSocketClient()}
		});
	};


	@Override
	protected Class<?>[] getAnnotatedConfigClasses() {
		return new Class<?>[] { TestWebSocketMessageBrokerConfiguration.class, SimpleBrokerConfigurer.class };
	}

	@Test
	public void sendMessage() throws Exception {

		final TextMessage textMessage = StompTextMessageBuilder.create(StompCommand.SEND)
				.headers("destination:/app/foo").build();

		WebSocketHandler clientHandler = new TextWebSocketHandlerAdapter() {
			@Override
			public void afterConnectionEstablished(WebSocketSession session) throws Exception {
				session.sendMessage(textMessage);
			}
		};

		TestController testController = this.wac.getBean(TestController.class);

		WebSocketSession session = this.webSocketClient.doHandshake(clientHandler, getWsBaseUrl() + "/ws");
		assertTrue(testController.latch.await(2, TimeUnit.SECONDS));
		session.close();

		testController.latch = new CountDownLatch(1);
		session = this.webSocketClient.doHandshake(clientHandler, getWsBaseUrl() + "/sockjs/websocket");
		assertTrue(testController.latch.await(2, TimeUnit.SECONDS));
		session.close();
	}


	@Configuration
	static class TestWebSocketMessageBrokerConfiguration extends DelegatingWebSocketMessageBrokerConfiguration {

		@Override
		@Bean
		public SubscribableChannel webSocketRequestChannel() {
			return new ExecutorSubscribableChannel(); // synchronous
		}

		@Override
		@Bean
		public SubscribableChannel webSocketReplyChannel() {
			return new ExecutorSubscribableChannel(); // synchronous
		}

		@Bean
		public TestController testController() {
			return new TestController();
		}
	}

	@Configuration
	static class SimpleBrokerConfigurer implements WebSocketMessageBrokerConfigurer {

		@Autowired
		private HandshakeHandler handshakeHandler; // can't rely on classpath for server detection


		@Override
		public void registerStompEndpoints(StompEndpointRegistry registry) {

			registry.addEndpoint("/ws")
				.setHandshakeHandler(this.handshakeHandler);

			registry.addEndpoint("/sockjs").withSockJS()
				.setTransportHandlerOverrides(new WebSocketTransportHandler(this.handshakeHandler));;
		}

		@Override
		public void configureMessageBroker(MessageBrokerConfigurer configurer) {
			configurer.setAnnotationMethodDestinationPrefixes("/app/");
			configurer.enableSimpleBroker("/topic");
		}
	}

	@Controller
	private static class TestController {

		private CountDownLatch latch = new CountDownLatch(1);

		@MessageMapping(value="/app/foo")
		public void handleFoo() {
			this.latch.countDown();
		}
	}

}