/*

 * 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.websocket.debug=true

 *       ImmediateAbort

 */

import java.io.IOException;

import java.net.http.WebSocket;

import java.nio.ByteBuffer;

import java.nio.channels.SocketChannel;

import java.util.Arrays;

import java.util.concurrent.CompletableFuture;

import java.util.concurrent.CompletionStage;

import java.util.concurrent.TimeUnit;

import java.util.concurrent.TimeoutException;

import org.testng.annotations.Test;

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

import static java.net.http.WebSocket.NORMAL_CLOSURE;

import static org.testng.Assert.assertEquals;

import static org.testng.Assert.assertThrows;

import static org.testng.Assert.assertTrue;

import static org.testng.Assert.fail;

public class ImmediateAbort {

    private static final Class<NullPointerException> NPE = NullPointerException.class;

    private static final Class<IllegalArgumentException> IAE = IllegalArgumentException.class;

    private static final Class<IOException> IOE = IOException.class;

    /*

     * Examines WebSocket behaviour after a call to abort()

     */

    @Test

    public void immediateAbort() throws Exception {

        try (DummyWebSocketServer server = serverWithCannedData(0x81, 0x00, 0x88, 0x00)) {

            server.open();

            CompletableFuture<Void> messageReceived = new CompletableFuture<>();

            WebSocket.Listener listener = new WebSocket.Listener() {

                @Override

                public void onOpen(WebSocket webSocket) {

                    /* no initial request */

                }

                @Override

                public CompletionStage<?> onText(WebSocket webSocket,

                                                 CharSequence message,

                                                 WebSocket.MessagePart part) {

                    messageReceived.complete(null);

                    return null;

                }

                @Override

                public CompletionStage<?> onBinary(WebSocket webSocket,

                                                   ByteBuffer message,

                                                   WebSocket.MessagePart part) {

                    messageReceived.complete(null);

                    return null;

                }

                @Override

                public CompletionStage<?> onPing(WebSocket webSocket,

                                                 ByteBuffer message) {

                    messageReceived.complete(null);

                    return null;

                }

                @Override

                public CompletionStage<?> onPong(WebSocket webSocket,

                                                 ByteBuffer message) {

                    messageReceived.complete(null);

                    return null;

                }

                @Override

                public CompletionStage<?> onClose(WebSocket webSocket,

                                                  int statusCode,

                                                  String reason) {

                    messageReceived.complete(null);

                    return null;

                }

            };

            WebSocket ws = newHttpClient()

                    .newWebSocketBuilder()

                    .buildAsync(server.getURI(), listener)

                    .join();

            for (int i = 0; i < 3; i++) {

                System.out.printf("iteration #%s%n", i);

                // after the first abort() each consecutive one must be a no-op,

                // moreover, query methods should continue to return consistent,

                // permanent values

                for (int j = 0; j < 3; j++) {

                    System.out.printf("abort #%s%n", j);

                    ws.abort();

                    assertTrue(ws.isInputClosed());

                    assertTrue(ws.isOutputClosed());

                    assertEquals(ws.getSubprotocol(), "");

                }

                // at this point valid requests MUST be a no-op:

                for (int j = 0; j < 3; j++) {

                    System.out.printf("request #%s%n", j);

                    ws.request(1);

                    ws.request(2);

                    ws.request(8);

                    ws.request(Integer.MAX_VALUE);

                    ws.request(Long.MAX_VALUE);

                    // invalid requests MUST throw IAE:

                    assertThrows(IAE, () -> ws.request(Integer.MIN_VALUE));

                    assertThrows(IAE, () -> ws.request(Long.MIN_VALUE));

                    assertThrows(IAE, () -> ws.request(-1));

                    assertThrows(IAE, () -> ws.request(0));

                }

            }

            // even though there is a bunch of messages readily available on the

            // wire we shouldn't have received any of them as we aborted before

            // the first request

            try {

                messageReceived.get(10, TimeUnit.SECONDS);

                fail();

            } catch (TimeoutException expected) {

                System.out.println("Finished waiting");

            }

            for (int i = 0; i < 3; i++) {

                System.out.printf("send #%s%n", i);

                assertFails(IOE, ws.sendText("text!", false));

                assertFails(IOE, ws.sendText("text!", true));

                assertFails(IOE, ws.sendBinary(ByteBuffer.allocate(16), false));

                assertFails(IOE, ws.sendBinary(ByteBuffer.allocate(16), true));

                assertFails(IOE, ws.sendPing(ByteBuffer.allocate(16)));

                assertFails(IOE, ws.sendPong(ByteBuffer.allocate(16)));

                assertFails(IOE, ws.sendClose(NORMAL_CLOSURE, "a reason"));

                assertThrows(NPE, () -> ws.sendText(null, false));

                assertThrows(NPE, () -> ws.sendText(null, true));

                assertThrows(NPE, () -> ws.sendBinary(null, false));

                assertThrows(NPE, () -> ws.sendBinary(null, true));

                assertThrows(NPE, () -> ws.sendPing(null));

                assertThrows(NPE, () -> ws.sendPong(null));

                assertThrows(NPE, () -> ws.sendClose(NORMAL_CLOSURE, null));

            }

        }

    }

    private static void assertFails(Class<? extends Throwable> clazz,

                                    CompletionStage<?> stage) {

        Support.assertCompletesExceptionally(clazz, stage);

    }

    private static DummyWebSocketServer serverWithCannedData(int... data) {

        byte[] copy = new byte[data.length];

        for (int i = 0; i < data.length; i++) {

            copy[i] = (byte) data[i];

        }

        return serverWithCannedData(copy);

    }

    private static DummyWebSocketServer serverWithCannedData(byte... data) {

        byte[] copy = Arrays.copyOf(data, data.length);

        return new DummyWebSocketServer() {

            @Override

            protected void serve(SocketChannel channel) throws IOException {

                ByteBuffer closeMessage = ByteBuffer.wrap(copy);

                channel.write(closeMessage);

                super.serve(channel);

            }

        };

    }

}