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#include <QtGui>

#include <QtNetwork>

#include "client.h"

Client::Client(QWidget *parent)

    : QDialog(parent)

{

    hostLabel = new QLabel(tr("&Server name:"));

    hostLineEdit = new QLineEdit("fortune");

    hostLabel->setBuddy(hostLineEdit);

    statusLabel = new QLabel(tr("This examples requires that you run the "

                                "Fortune Server example as well."));

    getFortuneButton = new QPushButton(tr("Get Fortune"));

    getFortuneButton->setDefault(true);

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

    buttonBox = new QDialogButtonBox;

    buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole);

    buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);

    socket = new QLocalSocket(this);

            this, SLOT(enableGetFortuneButton()));

    connect(getFortuneButton, SIGNAL(clicked()),

            this, SLOT(requestNewFortune()));

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

    connect(socket, SIGNAL(readyRead()), this, SLOT(readFortune()));

    connect(socket, SIGNAL(error(QLocalSocket::LocalSocketError)),

            this, SLOT(displayError(QLocalSocket::LocalSocketError)));

    QGridLayout *mainLayout = new QGridLayout;

    mainLayout->addWidget(hostLabel, 0, 0);

    mainLayout->addWidget(hostLineEdit, 0, 1);

    mainLayout->addWidget(statusLabel, 2, 0, 1, 2);

    mainLayout->addWidget(buttonBox, 3, 0, 1, 2);

    setLayout(mainLayout);

    setWindowTitle(tr("Fortune Client"));

    hostLineEdit->setFocus();

}

void Client::requestNewFortune()

{

    getFortuneButton->setEnabled(false);

    blockSize = 0;

    socket->abort();

    socket->connectToServer(hostLineEdit->text());

}

void Client::readFortune()

{

    QDataStream in(socket);

    in.setVersion(QDataStream::Qt_4_0);

    if (blockSize == 0) {

        if (socket->bytesAvailable() < (int)sizeof(quint16))

            return;

        in >> blockSize;

    }

    if (in.atEnd())

        return;

    QString nextFortune;

    in >> nextFortune;

    if (nextFortune == currentFortune) {

        QTimer::singleShot(0, this, SLOT(requestNewFortune()));

        return;

    }

    currentFortune = nextFortune;

    statusLabel->setText(currentFortune);

    getFortuneButton->setEnabled(true);

}

void Client::displayError(QLocalSocket::LocalSocketError socketError)

{

    switch (socketError) {

    case QLocalSocket::ServerNotFoundError:

        QMessageBox::information(this, tr("Fortune Client"),

                                 tr("The host was not found. Please check the "

                                    "host name and port settings."));

        break;

    case QLocalSocket::ConnectionRefusedError:

        QMessageBox::information(this, tr("Fortune Client"),

                                 tr("The connection was refused by the peer. "

                                    "Make sure the fortune server is running, "

                                    "and check that the host name and port "

                                    "settings are correct."));

        break;

    case QLocalSocket::PeerClosedError:

        break;

    default:

        QMessageBox::information(this, tr("Fortune Client"),

                                 tr("The following error occurred: %1.")

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

    }

    getFortuneButton->setEnabled(true);

}

void Client::enableGetFortuneButton()

{

    getFortuneButton->setEnabled(!hostLineEdit->text().isEmpty());

}