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#include <QtGui>

#include <QtNetwork>

#include <stdlib.h>

#include "server.h"

Server::Server(QWidget *parent)

    : QDialog(parent)

{

    statusLabel = new QLabel;

    quitButton = new QPushButton(tr("Quit"));

    quitButton->setAutoDefault(false);

//! [0] //! [1]

    tcpServer = new QTcpServer(this);

    if (!tcpServer->listen()) {

        QMessageBox::critical(this, tr("Fortune Server"),

                              tr("Unable to start the server: %1.")

                              .arg(tcpServer->errorString()));

        close();

        return;

    }

//! [0]

    QString ipAddress;

    QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();

    // use the first non-localhost IPv4 address

    for (int i = 0; i < ipAddressesList.size(); ++i) {

        if (ipAddressesList.at(i) != QHostAddress::LocalHost &&

            ipAddressesList.at(i).toIPv4Address()) {

            ipAddress = ipAddressesList.at(i).toString();

            break;

        }

    }

    // if we did not find one, use IPv4 localhost

    if (ipAddress.isEmpty())

        ipAddress = QHostAddress(QHostAddress::LocalHost).toString();

    statusLabel->setText(tr("The server is running on\n\nIP: %1\nport: %2\n\n"

                            "Run the Fortune Client example now.")

                         .arg(ipAddress).arg(tcpServer->serverPort()));

//! [1]

//! [2]

    fortunes << tr("You've been leading a dog's life. Stay off the furniture.")

             << tr("You've got to think about tomorrow.")

             << tr("You will be surprised by a loud noise.")

             << tr("You will feel hungry again in another hour.")

             << tr("You might have mail.")

             << tr("You cannot kill time without injuring eternity.")

             << tr("Computers are not intelligent. They only think they are.");

//! [2]

    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));

//! [3]

    connect(tcpServer, SIGNAL(newConnection()), this, SLOT(sendFortune()));

//! [3]

    QHBoxLayout *buttonLayout = new QHBoxLayout;

    buttonLayout->addStretch(1);

    buttonLayout->addWidget(quitButton);

    buttonLayout->addStretch(1);

    QVBoxLayout *mainLayout = new QVBoxLayout;

    mainLayout->addWidget(statusLabel);

    mainLayout->addLayout(buttonLayout);

    setLayout(mainLayout);

    setWindowTitle(tr("Fortune Server"));

}

//! [4]

void Server::sendFortune()

{

//! [5]

    QByteArray block;

    QDataStream out(&block, QIODevice::WriteOnly);

    out.setVersion(QDataStream::Qt_4_0);

//! [4] //! [6]

    out << (quint16)0;

    out << fortunes.at(qrand() % fortunes.size());

    out.device()->seek(0);

    out << (quint16)(block.size() - sizeof(quint16));

//! [6] //! [7]

    QTcpSocket *clientConnection = tcpServer->nextPendingConnection();

    connect(clientConnection, SIGNAL(disconnected()),

            clientConnection, SLOT(deleteLater()));

//! [7] //! [8]

    clientConnection->write(block);

    clientConnection->disconnectFromHost();

//! [5]

}

//! [8]