/*

 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @build DummyWebSocketServer

 * @run testng/othervm

 *      -Djdk.internal.httpclient.debug=true

 *      -Djdk.internal.httpclient.websocket.debug=true

 *       BlowupOutputQueue

 */

import org.testng.annotations.Test;

import java.io.IOException;

import java.net.http.WebSocket;

import java.nio.ByteBuffer;

import java.nio.CharBuffer;

import java.util.List;

import java.util.concurrent.CompletableFuture;

import java.util.concurrent.CompletionStage;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.TimeUnit;

import java.util.concurrent.TimeoutException;

import static java.net.http.HttpClient.newHttpClient;

import static org.testng.Assert.assertFalse;

public class BlowupOutputQueue extends PendingOperations {

    CompletableFuture<WebSocket> cfText;

    CompletableFuture<WebSocket> cfPing;

    CompletableFuture<WebSocket> cfClose;

    MockListener listener;

    /*

     * The idea is to arrange things such that the internal queue will be fully

     * utilized and then make sure there won't be any errors caused by that.

     *

     * First, fill the queue with Text messages. Once done, send a Ping message.

     * At this stage, there are at least 2 messages are in queue. Now, start

     * receiving. Received Ping messages will cause automatic Pong replies. When

     * all done, there will be at least 3 messages in the queue. (As at least

     * the a single Ping has to be replied). Then send a Close message. Now

     * there are at least 4 messages in the queue. Finally, receive the last

     * message which is a Close message. This will cause an automatic reply with

     * a Close message from the client side. All in all there should be at least

     * 5 messages in the queue.

     */

    @Test

    public void full() throws Exception {

        int N = 32;

        int[] incoming = new int[2 * (N + 1)]; // 2 bytes per message

        for (int i = 0; i < incoming.length - 2; i += 2) {

            // <PING>

            incoming[i + 0] = 0x89;

            incoming[i + 1] = 0x00;

        }

        // <CLOSE>

        incoming[incoming.length - 2] = 0x88;

        incoming[incoming.length - 1] = 0x00;

        repeatable(() -> {

            CountDownLatch allButCloseReceived = new CountDownLatch(N);

            server = Support.writingServer(incoming);

            server.open();

            listener = new MockListener() {

                @Override

                protected void replenish(WebSocket webSocket) {

                    /* do nothing */

                }

                @Override

                protected CompletionStage<?> onPing0(WebSocket webSocket,

                                                     ByteBuffer message) {

                    allButCloseReceived.countDown();

                    return null;

                }

            };

            webSocket = newHttpClient().newWebSocketBuilder()

                    .buildAsync(server.getURI(), listener)

                    .join();

            CharBuffer data = CharBuffer.allocate(65536);

            for (int i = 0; ; i++) {  // fill up the send buffer

                long start = System.currentTimeMillis();

                System.out.printf("begin cycle #%s at %s%n", i, start);

                cfText = webSocket.sendText(data, true);

                try {

                    cfText.get(MAX_WAIT_SEC, TimeUnit.SECONDS);

                    data.clear();

                } catch (TimeoutException e) {

                    break;

                } finally {

                    long stop = System.currentTimeMillis();

                    System.out.printf("end cycle #%s at %s (%s ms)%n", i, stop, stop - start);

                }

            }

            cfPing = webSocket.sendPing(ByteBuffer.allocate(125));

            webSocket.request(N);

            allButCloseReceived.await();

            webSocket.request(1); // Receive the last message: Close

            return null;

        }, () -> cfText.isDone());

        List<MockListener.Invocation> invocations = listener.invocations();

        cfClose = webSocket.sendClose(WebSocket.NORMAL_CLOSURE, "ok");

        assertFalse(invocations.contains(new MockListener.OnError(webSocket, IOException.class)));

        assertFalse(cfText.isDone());

        assertFalse(cfPing.isDone());

        assertFalse(cfClose.isDone());

    }

}