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#include <QtGui>

#include <QtNetwork>

#include <stdlib.h>

#include "server.h"

Server::Server(QWidget *parent)

:   QDialog(parent), tcpServer(0), networkSession(0)

{

    statusLabel = new QLabel;

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

    quitButton->setAutoDefault(false);

    QNetworkConfigurationManager manager;

    if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) {

        // Get saved network configuration

        QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));

        settings.beginGroup(QLatin1String("QtNetwork"));

        const QString id = settings.value(QLatin1String("DefaultNetworkConfiguration")).toString();

        settings.endGroup();

        // If the saved network configuration is not currently discovered use the system default

        QNetworkConfiguration config = manager.configurationFromIdentifier(id);

        if ((config.state() & QNetworkConfiguration::Discovered) !=

            QNetworkConfiguration::Discovered) {

            config = manager.defaultConfiguration();

        }

        networkSession = new QNetworkSession(config, this);

        connect(networkSession, SIGNAL(opened()), this, SLOT(sessionOpened()));

        statusLabel->setText(tr("Opening network session."));

        networkSession->open();

    } else {

        sessionOpened();

    }

    //! [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"));

}

void Server::sessionOpened()

{

    // Save the used configuration

//! [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]

}

//! [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]