/*
 *  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.karaf.itests.examples;

import org.apache.karaf.itests.BaseTest;
import org.eclipse.jetty.websocket.api.Session;
import org.eclipse.jetty.websocket.api.StatusCode;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketClose;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketConnect;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketMessage;
import org.eclipse.jetty.websocket.api.annotations.WebSocket;
import org.eclipse.jetty.websocket.client.ClientUpgradeRequest;
import org.eclipse.jetty.websocket.client.WebSocketClient;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.ops4j.pax.exam.junit.PaxExam;
import org.ops4j.pax.exam.spi.reactors.ExamReactorStrategy;
import org.ops4j.pax.exam.spi.reactors.PerClass;
import org.osgi.framework.Bundle;

import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

import static junit.framework.TestCase.assertEquals;
import static junit.framework.TestCase.assertTrue;

@RunWith(PaxExam.class)
@ExamReactorStrategy(PerClass.class)
public class WebSocketExampleTest extends BaseTest {

    @Test(timeout = 60000)
    public void test() throws Exception {
        featureService.installFeature("scr");
        featureService.installFeature("http");
        featureService.installFeature("jetty");

        Bundle bundle = bundleContext.installBundle("mvn:org.apache.karaf.examples/karaf-websocket-example/" + System.getProperty("karaf.version"));
        bundle.start();

        String httpList = executeCommand("http:list");
        while (!httpList.contains("Deployed")) {
            Thread.sleep(1000);
            httpList = executeCommand("http:list");
        }
        System.out.println(httpList);

        WebSocketClient client = new WebSocketClient();
        SimpleSocket socket = new SimpleSocket();
        client.start();
        URI uri = new URI("ws://localhost:" + getHttpPort() + "/example-websocket");
        ClientUpgradeRequest request = new ClientUpgradeRequest();
        client.connect(socket, uri, request);

        socket.awaitClose(10, TimeUnit.SECONDS);

        assertTrue(socket.messages.size() > 0);

        assertEquals("Hello World", socket.messages.get(0));

        client.stop();
    }

    @WebSocket
    public class SimpleSocket {

        private final CountDownLatch closeLatch;

        private Session session;

        public final List<String> messages;

        public SimpleSocket() {
            this.messages = new ArrayList<>();
            this.closeLatch = new CountDownLatch(1);
        }

        public boolean awaitClose(int duration, TimeUnit unit) throws InterruptedException {
            return this.closeLatch.await(duration, unit);
        }

        @OnWebSocketClose
        public void onClose(int statusCode, String reason) {
            System.out.println("Closing websocket client");
            session.close(StatusCode.NORMAL, "I'm done");
            this.session = null;
            this.closeLatch.countDown(); // trigger latch
        }

        @OnWebSocketConnect
        public void onConnect(Session session) {
            System.out.println("Connecting websocket client");
            this.session = session;
        }

        @OnWebSocketMessage
        public void onMessage(String msg) {
            System.out.println("Received websocket message: " + msg);
            messages.add(msg);
        }
    }

}
