// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
// Qt
#include <QByteArray>
#include <QCoreApplication>
#include <QDataStream>
#include <QTimer>

// Test
#include "Test.h"

//------------------------------------------------------------------------------
My4Socket::My4Socket(QObject *parent)
    : QTcpSocket(parent), safeShutDown(false)
{
    connect(this, SIGNAL(readyRead()), this, SLOT(read()));
    connect(this, SIGNAL(disconnected()), this, SLOT(closed()));
}

//------------------------------------------------------------------------------
void My4Socket::read(void)
{
    QDataStream in(this);

    quint32 num = 0;
    quint32 reply = 0;

    while (bytesAvailable()) {
        in >> num;
        if (num == 42) {
            safeShutDown = true;
            qDebug("SUCCESS");
            QCoreApplication::instance()->quit();
            return;
        }
        reply = num + 1;
        if (reply == 42)
            ++reply;
    }

    // Reply with a bigger number
    sendTest(reply);
}

//------------------------------------------------------------------------------
void My4Socket::closed(void)
{
    if (!safeShutDown)
        qDebug("FAILED");
    QCoreApplication::instance()->quit();
}

//------------------------------------------------------------------------------
void My4Socket::sendTest(quint32 num)
{
    QByteArray  block;
    QDataStream out(&block, QIODevice::WriteOnly);
    out << num;

    write(block, block.size());
}

//------------------------------------------------------------------------------
My4Server::My4Server(QObject *parent)
    : QTcpServer(parent)
{
    if (listen(QHostAddress::Any, 7700))
        qDebug("qt4server");
    QTimer::singleShot(5000, this, SLOT(stopServer()));
}

//------------------------------------------------------------------------------
void My4Server::incomingConnection(qintptr socketId)
{
    m_socket = new My4Socket(this);
    m_socket->setSocketDescriptor(socketId);
}

//------------------------------------------------------------------------------
void My4Server::stopServer()
{
    if (m_socket) {
        qDebug("SUCCESS");
        m_socket->safeShutDown = true;
        m_socket->sendTest(42);
    } else {
        QCoreApplication::instance()->quit();
    }
}

//------------------------------------------------------------------------------
Test::Test(Type type)
{
    switch (type) {
    case Qt4Client: {
        qDebug("qt4client");
        My4Socket *s = new My4Socket(this);
        s->connectToHost("localhost", 7700);
        s->sendTest(1);
        break;
    }
    case Qt4Server: {
        new My4Server(this);
        break;
    }
    default:
        break;
    }
}