//
//  ========================================================================
//  Copyright (c) 1995-2019 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.websocket.server.ab;

import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.eclipse.jetty.util.StringUtil;
import org.eclipse.jetty.util.log.StacklessLogging;
import org.eclipse.jetty.websocket.api.StatusCode;
import org.eclipse.jetty.websocket.common.CloseInfo;
import org.eclipse.jetty.websocket.common.OpCode;
import org.eclipse.jetty.websocket.common.Parser;
import org.eclipse.jetty.websocket.common.WebSocketFrame;
import org.eclipse.jetty.websocket.common.frames.PingFrame;
import org.eclipse.jetty.websocket.common.frames.PongFrame;
import org.eclipse.jetty.websocket.common.test.Fuzzer;
import org.junit.jupiter.api.Test;

public class TestABCase2 extends AbstractABCase
{
    /**
     * Ping without payload
     *
     * @throws Exception on test failure
     */
    @Test
    public void testCase2_1() throws Exception
    {
        WebSocketFrame send = new PingFrame();

        WebSocketFrame expect = new PongFrame();

        try (Fuzzer fuzzer = new Fuzzer(this))
        {
            fuzzer.connect();
            fuzzer.setSendMode(Fuzzer.SendMode.BULK);
            fuzzer.send(send);
            fuzzer.expect(expect);
        }
    }

    /**
     * 10 pings
     *
     * @throws Exception on test failure
     */
    @Test
    public void testCase2_10() throws Exception
    {
        // send 10 pings each with unique payload
        // send close
        // expect 10 pongs with our unique payload
        // expect close

        int pingCount = 10;

        List<WebSocketFrame> send = new ArrayList<>();
        List<WebSocketFrame> expect = new ArrayList<>();

        for (int i = 0; i < pingCount; i++)
        {
            String payload = String.format("ping-%d[%X]", i, i);
            send.add(new PingFrame().setPayload(payload));
            expect.add(new PongFrame().setPayload(payload));
        }
        send.add(new CloseInfo(StatusCode.NORMAL).asFrame());
        expect.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        try (Fuzzer fuzzer = new Fuzzer(this))
        {
            fuzzer.connect();
            fuzzer.setSendMode(Fuzzer.SendMode.BULK);
            fuzzer.send(send);
            fuzzer.expect(expect);
        }
    }

    /**
     * 10 pings, sent slowly
     *
     * @throws Exception on test failure
     */
    @Test
    public void testCase2_11() throws Exception
    {
        // send 10 pings (slowly) each with unique payload
        // send close
        // expect 10 pongs with OUR payload
        // expect close

        int pingCount = 10;

        List<WebSocketFrame> send = new ArrayList<>();
        List<WebSocketFrame> expect = new ArrayList<>();

        for (int i = 0; i < pingCount; i++)
        {
            String payload = String.format("ping-%d[%X]", i, i);
            send.add(new PingFrame().setPayload(payload));
            expect.add(new PongFrame().setPayload(payload));
        }
        send.add(new CloseInfo(StatusCode.NORMAL).asFrame());
        expect.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        try (Fuzzer fuzzer = new Fuzzer(this))
        {
            fuzzer.connect();
            fuzzer.setSendMode(Fuzzer.SendMode.SLOW);
            fuzzer.setSlowSendSegmentSize(5);
            fuzzer.send(send);
            fuzzer.expect(expect);
        }
    }

    /**
     * Ping with small text payload
     *
     * @throws Exception on test failure
     */
    @Test
    public void testCase2_2() throws Exception
    {
        byte[] payload = StringUtil.getUtf8Bytes("Hello world");

        List<WebSocketFrame> send = new ArrayList<>();
        send.add(new PingFrame().setPayload(payload));
        send.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        List<WebSocketFrame> expect = new ArrayList<>();
        expect.add(new PongFrame().setPayload(copyOf(payload)));
        expect.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        try (Fuzzer fuzzer = new Fuzzer(this))
        {
            fuzzer.connect();
            fuzzer.setSendMode(Fuzzer.SendMode.BULK);
            fuzzer.send(send);
            fuzzer.expect(expect);
        }
    }

    /**
     * Ping with small binary (non-utf8) payload
     *
     * @throws Exception on test failure
     */
    @Test
    public void testCase2_3() throws Exception
    {
        byte[] payload = new byte[]{0x00, (byte)0xFF, (byte)0xFE, (byte)0xFD, (byte)0xFC, (byte)0xFB, 0x00, (byte)0xFF};

        List<WebSocketFrame> send = new ArrayList<>();
        send.add(new PingFrame().setPayload(payload));
        send.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        List<WebSocketFrame> expect = new ArrayList<>();
        expect.add(new PongFrame().setPayload(copyOf(payload)));
        expect.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        try (Fuzzer fuzzer = new Fuzzer(this))
        {
            fuzzer.connect();
            fuzzer.setSendMode(Fuzzer.SendMode.BULK);
            fuzzer.send(send);
            fuzzer.expect(expect);
        }
    }

    /**
     * Ping with 125 byte binary payload
     *
     * @throws Exception on test failure
     */
    @Test
    public void testCase2_4() throws Exception
    {
        byte[] payload = new byte[125];
        Arrays.fill(payload, (byte)0xFE);

        List<WebSocketFrame> send = new ArrayList<>();
        send.add(new PingFrame().setPayload(payload));
        send.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        List<WebSocketFrame> expect = new ArrayList<>();
        expect.add(new PongFrame().setPayload(copyOf(payload)));
        expect.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        try (Fuzzer fuzzer = new Fuzzer(this))
        {
            fuzzer.connect();
            fuzzer.setSendMode(Fuzzer.SendMode.BULK);
            fuzzer.send(send);
            fuzzer.expect(expect);
        }
    }

    /**
     * Ping with 126 byte binary payload
     *
     * @throws Exception on test failure
     */
    @Test
    public void testCase2_5() throws Exception
    {
        try (StacklessLogging scope = new StacklessLogging(Parser.class))
        {
            byte[] payload = new byte[126]; // intentionally too big
            Arrays.fill(payload, (byte)'5');
            ByteBuffer buf = ByteBuffer.wrap(payload);

            List<WebSocketFrame> send = new ArrayList<>();
            // trick websocket frame into making extra large payload for ping
            send.add(new BadFrame(OpCode.PING).setPayload(buf));
            send.add(new CloseInfo(StatusCode.NORMAL, "Test 2.5").asFrame());

            List<WebSocketFrame> expect = new ArrayList<>();
            expect.add(new CloseInfo(StatusCode.PROTOCOL).asFrame());

            try (Fuzzer fuzzer = new Fuzzer(this))
            {
                fuzzer.connect();
                fuzzer.setSendMode(Fuzzer.SendMode.BULK);
                fuzzer.send(send);
                fuzzer.expect(expect);
            }
        }
    }

    /**
     * Ping with 125 byte binary payload (slow send)
     *
     * @throws Exception on test failure
     */
    @Test
    public void testCase2_6() throws Exception
    {
        byte[] payload = new byte[125];
        Arrays.fill(payload, (byte)'6');

        List<WebSocketFrame> send = new ArrayList<>();
        send.add(new PingFrame().setPayload(payload));
        send.add(new CloseInfo(StatusCode.NORMAL, "Test 2.6").asFrame());

        List<WebSocketFrame> expect = new ArrayList<>();
        expect.add(new PongFrame().setPayload(copyOf(payload)));
        expect.add(new CloseInfo(StatusCode.NORMAL, "Test 2.6").asFrame());

        try (Fuzzer fuzzer = new Fuzzer(this))
        {
            fuzzer.connect();
            fuzzer.setSendMode(Fuzzer.SendMode.SLOW);
            fuzzer.setSlowSendSegmentSize(1);
            fuzzer.send(send);
            fuzzer.expect(expect);
        }
    }

    /**
     * Unsolicited pong frame without payload
     *
     * @throws Exception on test failure
     */
    @Test
    public void testCase2_7() throws Exception
    {
        List<WebSocketFrame> send = new ArrayList<>();
        send.add(new PongFrame()); // unsolicited pong
        send.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        List<WebSocketFrame> expect = new ArrayList<>();
        expect.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        try (Fuzzer fuzzer = new Fuzzer(this))
        {
            fuzzer.connect();
            fuzzer.setSendMode(Fuzzer.SendMode.BULK);
            fuzzer.send(send);
            fuzzer.expect(expect);
        }
    }

    /**
     * Unsolicited pong frame with basic payload
     *
     * @throws Exception on test failure
     */
    @Test
    public void testCase2_8() throws Exception
    {
        List<WebSocketFrame> send = new ArrayList<>();
        send.add(new PongFrame().setPayload("unsolicited")); // unsolicited pong
        send.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        List<WebSocketFrame> expect = new ArrayList<>();
        expect.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        try (Fuzzer fuzzer = new Fuzzer(this))
        {
            fuzzer.connect();
            fuzzer.setSendMode(Fuzzer.SendMode.BULK);
            fuzzer.send(send);
            fuzzer.expect(expect);
        }
    }

    /**
     * Unsolicited pong frame, then ping with basic payload
     *
     * @throws Exception on test failure
     */
    @Test
    public void testCase2_9() throws Exception
    {
        List<WebSocketFrame> send = new ArrayList<>();
        send.add(new PongFrame().setPayload("unsolicited")); // unsolicited pong
        send.add(new PingFrame().setPayload("our ping")); // our ping
        send.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        List<WebSocketFrame> expect = new ArrayList<>();
        expect.add(new PongFrame().setPayload("our ping")); // our pong
        expect.add(new CloseInfo(StatusCode.NORMAL).asFrame());

        try (Fuzzer fuzzer = new Fuzzer(this))
        {
            fuzzer.connect();
            fuzzer.setSendMode(Fuzzer.SendMode.BULK);
            fuzzer.send(send);
            fuzzer.expect(expect);
        }
    }
}
