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#include "certificateinfo.h"

#include "sslclient.h"

#include "ui_sslclient.h"

#include "ui_sslerrors.h"

#include <QtGui/QScrollBar>

#include <QtGui/QStyle>

#include <QtGui/QToolButton>

#include <QtNetwork/QSslCipher>

SslClient::SslClient(QWidget *parent)

    : QWidget(parent), socket(0), padLock(0), executingDialog(false)

{

    form = new Ui_Form;

    form->setupUi(this);

    form->hostNameEdit->setSelection(0, form->hostNameEdit->text().size());

    form->sessionOutput->setHtml(tr("<not connected>"));

    connect(form->hostNameEdit, SIGNAL(textChanged(QString)),

            this, SLOT(updateEnabledState()));

    connect(form->connectButton, SIGNAL(clicked()),

            this, SLOT(secureConnect()));

    connect(form->sendButton, SIGNAL(clicked()),

            this, SLOT(sendData()));

}

SslClient::~SslClient()

{

    delete form;

}

void SslClient::updateEnabledState()

{

    bool unconnected = !socket || socket->state() == QAbstractSocket::UnconnectedState;

    form->hostNameEdit->setReadOnly(!unconnected);

    form->hostNameEdit->setFocusPolicy(unconnected ? Qt::StrongFocus : Qt::NoFocus);

    form->hostNameLabel->setEnabled(unconnected);

    form->portBox->setEnabled(unconnected);

    form->portLabel->setEnabled(unconnected);

    form->connectButton->setEnabled(unconnected && !form->hostNameEdit->text().isEmpty());

    bool connected = socket && socket->state() == QAbstractSocket::ConnectedState;

    form->sessionBox->setEnabled(connected);

    form->sessionOutput->setEnabled(connected);

    form->sessionInput->setEnabled(connected);

    form->sessionInputLabel->setEnabled(connected);

    form->sendButton->setEnabled(connected);

}

void SslClient::secureConnect()

{

    if (!socket) {

        socket = new QSslSocket(this);

        connect(socket, SIGNAL(stateChanged(QAbstractSocket::SocketState)),

                this, SLOT(socketStateChanged(QAbstractSocket::SocketState)));

        connect(socket, SIGNAL(encrypted()),

                this, SLOT(socketEncrypted()));

        connect(socket, SIGNAL(sslErrors(QList<QSslError>)),

                this, SLOT(sslErrors(QList<QSslError>)));

        connect(socket, SIGNAL(readyRead()),

                this, SLOT(socketReadyRead()));

    }

    socket->connectToHostEncrypted(form->hostNameEdit->text(), form->portBox->value());

    updateEnabledState();

}

void SslClient::socketStateChanged(QAbstractSocket::SocketState state)

{

    if (executingDialog)

        return;

    updateEnabledState();

    if (state == QAbstractSocket::UnconnectedState) {

        form->hostNameEdit->setPalette(QPalette());

        form->hostNameEdit->setFocus();

        form->cipherLabel->setText(tr("<none>"));

        if (padLock)

            padLock->hide();

        socket->deleteLater();

        socket = 0;

    }

}

void SslClient::socketEncrypted()

{

    if (!socket)

        return;                 // might have disconnected already

    form->sessionOutput->clear();

    form->sessionInput->setFocus();

    QPalette palette;

    palette.setColor(QPalette::Base, QColor(255, 255, 192));

    form->hostNameEdit->setPalette(palette);

    QSslCipher ciph = socket->sessionCipher();

    QString cipher = QString("%1, %2 (%3/%4)").arg(ciph.authenticationMethod())

                     .arg(ciph.name()).arg(ciph.usedBits()).arg(ciph.supportedBits());;

    form->cipherLabel->setText(cipher);

    if (!padLock) {

        padLock = new QToolButton;

        padLock->setIcon(QIcon(":/encrypted.png"));

#ifndef QT_NO_CURSOR

        padLock->setCursor(Qt::ArrowCursor);

#endif

        padLock->setToolTip(tr("Display encryption details."));

        int extent = form->hostNameEdit->height() - 2;

        padLock->resize(extent, extent);

        padLock->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Ignored);

        QHBoxLayout *layout = new QHBoxLayout(form->hostNameEdit);

        layout->setMargin(form->hostNameEdit->style()->pixelMetric(QStyle::PM_DefaultFrameWidth));

        layout->setSpacing(0);

        layout->addStretch();

        layout->addWidget(padLock);

        form->hostNameEdit->setLayout(layout);

        connect(padLock, SIGNAL(clicked()),

                this, SLOT(displayCertificateInfo()));

    } else {

        padLock->show();

    }

}

void SslClient::socketReadyRead()

{

    appendString(QString::fromUtf8(socket->readAll()));

}

void SslClient::sendData()

{

    QString input = form->sessionInput->text();

    appendString(input + '\n');

    socket->write(input.toUtf8() + "\r\n");

    form->sessionInput->clear();

}

void SslClient::sslErrors(const QList<QSslError> &errors)

{

    QDialog errorDialog(this);

    Ui_SslErrors ui;

    ui.setupUi(&errorDialog);

    connect(ui.certificateChainButton, SIGNAL(clicked()),

            this, SLOT(displayCertificateInfo()));

    foreach (const QSslError &error, errors)

        ui.sslErrorList->addItem(error.errorString());

    executingDialog = true;

    if (errorDialog.exec() == QDialog::Accepted)

        socket->ignoreSslErrors();

    executingDialog = false;

    // did the socket state change?

    if (socket->state() != QAbstractSocket::ConnectedState)

        socketStateChanged(socket->state());

}

void SslClient::displayCertificateInfo()

{

    CertificateInfo *info = new CertificateInfo(this);

    info->setCertificateChain(socket->peerCertificateChain());

    info->exec();

    info->deleteLater();

}

void SslClient::appendString(const QString &line)

{

    QTextCursor cursor(form->sessionOutput->textCursor());

    cursor.movePosition(QTextCursor::End);

    cursor.insertText(line);

    form->sessionOutput->verticalScrollBar()->setValue(form->sessionOutput->verticalScrollBar()->maximum());

}