/**
 *
 * VBox frontends: Qt GUI ("VirtualBox"):
 * "VirtualBox Information Dialog" dialog UI include (Qt Designer)
 */

/*
 * Copyright (C) 2006 Sun Microsystems, Inc.
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 USA or visit http://www.sun.com if you need
 * additional information or have any questions.
 */

/****************************************************************************
** ui.h extension file, included from the uic-generated form implementation.
**
** If you wish to add, delete or rename functions or slots use
** Qt Designer which will update this file, preserving your code. Create an
** init() function in place of a constructor, and a destroy() function in
** place of a destructor.
*****************************************************************************/


VBoxVMInformationDlg::InfoDlgMap VBoxVMInformationDlg::mSelfArray = InfoDlgMap();

void VBoxVMInformationDlg::createInformationDlg (const CSession &aSession,
                                                 VBoxConsoleView *aConsole)
{
    CMachine machine = aSession.GetMachine();
    if (mSelfArray.find (machine.GetName()) == mSelfArray.end())
    {
        /* creating new information dialog if there is no one existing */
        mSelfArray [machine.GetName()] = new VBoxVMInformationDlg (
            aConsole, "VBoxVMInformationDlg", WType_TopLevel | WDestructiveClose);
        /* read new machine data for this information dialog */
        mSelfArray [machine.GetName()]->setup (aSession, aConsole);
    }

    VBoxVMInformationDlg *info = mSelfArray [machine.GetName()];
    info->show();
    info->raise();
    info->setWindowState (info->windowState() & ~WindowMinimized);
    info->setActiveWindow();
}


void VBoxVMInformationDlg::init()
{
    /* dialog initially is not polished */
    mIsPolished = false;

    /* search the default button */
    mDefaultButton = searchDefaultButton();
    qApp->installEventFilter (this);

    /* setup a dialog icon */
    setIcon (QPixmap::fromMimeSource ("description_16px.png"));

    /* statusbar initially disabled */
    statusBar()->setHidden (true);

    /* setup size grip */
    mSizeGrip = new QSizeGrip (centralWidget(), "mSizeGrip");
    mSizeGrip->resize (mSizeGrip->sizeHint());
    mSizeGrip->stackUnder (mCloseButton);

    /* logs list creation */
    mInfoStack = new QTabWidget (mInfoFrame, "mInfoStack");
    mInfoStack->setMargin (10);
    QVBoxLayout *infoFrameLayout = new QVBoxLayout (mInfoFrame);
    infoFrameLayout->addWidget (mInfoStack);

    /* details view creation */
    mDetailsText = new QTextBrowser();
    mDetailsText->setFrameShape (QFrame::NoFrame);
    mDetailsText->setPaper (backgroundBrush());
    mInfoStack->addTab (mDetailsText,
                        VBoxGlobal::iconSet ("settings_16px.png"),
                        QString::null);

    /* statistic view creation */
    mStatisticText = new QTextBrowser();
    mStatisticText->setFrameShape (QFrame::NoFrame);
    mStatisticText->setPaper (backgroundBrush());
    mInfoStack->addTab (mStatisticText,
                        VBoxGlobal::iconSet ("state_running_16px.png"),
                        QString::null);

    /* full list of statistics counters to get total info */
    // mDefStatText = new QTextBrowser();
    // mDefStatText->setFrameShape (QFrame::NoFrame);
    // mDefStatText->setPaper (backgroundBrush());
    // mInfoStack->addTab (mDefStatText,
    //                     VBoxGlobal::iconSet ("show_logs_16px.png"),
    //                     QString::null);

    /* show statistics page and make it focused */
    connect (mInfoStack, SIGNAL (currentChanged (QWidget*)),
             this, SLOT (onPageChanged (QWidget*)));
    mInfoStack->showPage (mStatisticText);
}


void VBoxVMInformationDlg::destroy()
{
    /* save dialog attributes for this vm */
    QString dlgsize ("%1,%2,%3");
    mSession.GetMachine().SetExtraData (VBoxDefs::GUI_InfoDlgState,
        dlgsize.arg (mWidth).arg (mHeight).arg (isMaximized() ? "max" : "normal"));

    if (!mSession.isNull() && !mSession.GetMachine().isNull())
        mSelfArray.erase (mSession.GetMachine().GetName());
}


void VBoxVMInformationDlg::setup (const CSession &aSession,
                                  VBoxConsoleView *aConsole)
{
    /* store related machine pointers */
    mSession = aSession;
    mConsole = aConsole;

    /* loading language constants */
    languageChangeImp();

    /* details page update */
    updateDetails();

    /* statistics page update */
    processStatistics();
    mStatTimer.start (5000);

    /* setup handlers */
    connect (&vboxGlobal(), SIGNAL (mediaEnumFinished (const VBoxMediaList &)),
             this, SLOT (updateDetails()));
    connect (mConsole, SIGNAL (mediaChanged (VBoxDefs::DiskType)),
             this, SLOT (updateDetails()));
    connect (mConsole, SIGNAL (sharedFoldersChanged()),
             this, SLOT (updateDetails()));

    connect (&mStatTimer, SIGNAL (timeout()), this, SLOT (processStatistics()));
    connect (mConsole, SIGNAL (resizeHintDone()), this, SLOT (processStatistics()));

    /* preload dialog attributes for this vm */
    QString dlgsize = mSession.GetMachine().GetExtraData (VBoxDefs::GUI_InfoDlgState);
    if (dlgsize.isNull())
    {
        mWidth = 400;
        mHeight = 450;
        mMax = false;
    }
    else
    {
        QStringList list = QStringList::split (',', dlgsize);
        mWidth = list [0].toInt(), mHeight = list [1].toInt();
        mMax = list [2] == "max";
    }
}


void VBoxVMInformationDlg::languageChangeImp()
{
    AssertReturnVoid (!mSession.isNull());

    CMachine machine = mSession.GetMachine();
    AssertReturnVoid (!machine.isNull());

    /* Setup a dialog caption. */
    setCaption (tr ("%1 - Session Information").arg (machine.GetName()));

    /* Setup a tabwidget page names. */
    mInfoStack->changeTab (mDetailsText, tr ("&Details"));
    mInfoStack->changeTab (mStatisticText, tr ("&Runtime"));
    // mInfoStack->changeTab (mDefStatText, tr ("De&fault Stat"));

    /* Clear counter names initially. */
    mNamesMap.clear();
    mUnitsMap.clear();
    mLinksMap.clear();

    /* IDE HD statistics: */
    for (int i = 0; i < 2; ++ i)
    for (int j = 0; j < 2; ++ j)
    {
        /* Names */
        mNamesMap [QString ("/Devices/ATA%1/Unit%2/*DMA")
                   .arg (i).arg (j)] = tr ("DMA Transfers");
        mNamesMap [QString ("/Devices/ATA%1/Unit%2/*PIO")
                   .arg (i).arg (j)] = tr ("PIO Transfers");
        mNamesMap [QString ("/Devices/ATA%1/Unit%2/ReadBytes")
                   .arg (i).arg (j)] = tr ("Data Read");
        mNamesMap [QString ("/Devices/ATA%1/Unit%2/WrittenBytes")
                   .arg (i).arg (j)] = tr ("Data Written");

        /* Units */
        mUnitsMap [QString ("/Devices/ATA%1/Unit%2/*DMA")
                   .arg (i).arg (j)] = "[B]";
        mUnitsMap [QString ("/Devices/ATA%1/Unit%2/*PIO")
                   .arg (i).arg (j)] = "[B]";
        mUnitsMap [QString ("/Devices/ATA%1/Unit%2/ReadBytes")
                   .arg (i).arg (j)] = "B";
        mUnitsMap [QString ("/Devices/ATA%1/Unit%2/WrittenBytes")
                   .arg (i).arg (j)] = "B";

        /* Belongs to */
        mLinksMap [QString ("IDE%1%2").arg (i).arg (j)] = QStringList()
            << QString ("/Devices/ATA%1/Unit%2/*DMA").arg (i).arg (j)
            << QString ("/Devices/ATA%1/Unit%2/*PIO").arg (i).arg (j)
            << QString ("/Devices/ATA%1/Unit%2/ReadBytes").arg (i).arg (j)
            << QString ("/Devices/ATA%1/Unit%2/WrittenBytes").arg (i).arg (j);
    }

    /* SATA HD statistics: */
    for (int i = 0; i < 30; ++ i)
    {
        /* Names */
        mNamesMap [QString ("/Devices/SATA/Port%1/DMA").arg (i)]
            = tr ("DMA Transfers");
        mNamesMap [QString ("/Devices/SATA/Port%1/ReadBytes").arg (i)]
            = tr ("Data Read");
        mNamesMap [QString ("/Devices/SATA/Port%1/WrittenBytes").arg (i)]
            = tr ("Data Written");

        /* Units */
        mUnitsMap [QString ("/Devices/SATA/Port%1/DMA").arg (i)] = "[B]";
        mUnitsMap [QString ("/Devices/SATA/Port%1/ReadBytes").arg (i)] = "B";
        mUnitsMap [QString ("/Devices/SATA/Port%1/WrittenBytes").arg (i)] = "B";

        /* Belongs to */
        mLinksMap [QString ("SATA%1").arg (i)] = QStringList()
            << QString ("/Devices/SATA/Port%1/DMA").arg (i)
            << QString ("/Devices/SATA/Port%1/ReadBytes").arg (i)
            << QString ("/Devices/SATA/Port%1/WrittenBytes").arg (i);
    }

    /* Network Adapters statistics: */
    ulong count = vboxGlobal().virtualBox()
                  .GetSystemProperties().GetNetworkAdapterCount();
    for (ulong i = 0; i < count; ++ i)
    {
        CNetworkAdapter na = machine.GetNetworkAdapter (i);
        KNetworkAdapterType ty = na.GetAdapterType();
        const char *name;

        switch (ty)
        {
            case KNetworkAdapterType_I82540EM:
            case KNetworkAdapterType_I82543GC:
                name = "E1k";
                break;
            default:
                name = "PCNet";
                break;
        }

        /* Names */
        mNamesMap [QString ("/Devices/%1%2/TransmitBytes")
            .arg (name).arg (i)] = tr ("Data Transmitted");
        mNamesMap [QString ("/Devices/%1%2/ReceiveBytes")
            .arg (name).arg (i)] = tr ("Data Received");

        /* Units */
        mUnitsMap [QString ("/Devices/%1%2/TransmitBytes")
            .arg (name).arg (i)] = "B";
        mUnitsMap [QString ("/Devices/%1%2/ReceiveBytes")
            .arg (name).arg (i)] = "B";

        /* Belongs to */
        mLinksMap [QString ("NA%1").arg (i)] = QStringList()
            << QString ("/Devices/%1%2/TransmitBytes").arg (name).arg (i)
            << QString ("/Devices/%1%2/ReceiveBytes").arg (name).arg (i);
    }

    /* Statistics page update. */
    refreshStatistics();
}


QPushButton* VBoxVMInformationDlg::searchDefaultButton()
{
    /* this mechanism is used for searching the default dialog button
     * and similar the same mechanism in Qt::QDialog inner source */
    QPushButton *button = 0;
    QObjectList *list = queryList ("QPushButton");
    QObjectListIt it (*list);
    while ((button = (QPushButton*)it.current()) && !button->isDefault())
        ++ it;
    return button;
}


bool VBoxVMInformationDlg::eventFilter (QObject *aObject, QEvent *aEvent)
{
    switch (aEvent->type())
    {
        /* auto-default button focus-in processor used to move the "default"
         * button property into the currently focused button */
        case QEvent::FocusIn:
        {
            if (aObject->inherits ("QPushButton") &&
                aObject->parent() == centralWidget())
            {
                ((QPushButton*)aObject)->setDefault (aObject != mDefaultButton);
                if (mDefaultButton)
                    mDefaultButton->setDefault (aObject == mDefaultButton);
            }
            break;
        }
        /* auto-default button focus-out processor used to remove the "default"
         * button property from the previously focused button */
        case QEvent::FocusOut:
        {
            if (aObject->inherits ("QPushButton") &&
                aObject->parent() == centralWidget())
            {
                if (mDefaultButton)
                    mDefaultButton->setDefault (aObject != mDefaultButton);
                ((QPushButton*)aObject)->setDefault (aObject == mDefaultButton);
            }
            break;
        }
        default:
            break;
    }
    return QMainWindow::eventFilter (aObject, aEvent);
}


bool VBoxVMInformationDlg::event (QEvent *aEvent)
{
    bool result = QMainWindow::event (aEvent);
    switch (aEvent->type())
    {
        case QEvent::LanguageChange:
        {
            if (!mSession.isNull())
                languageChangeImp();
            break;
        }
        case QEvent::WindowStateChange:
        {
            if (mIsPolished)
                mMax = isMaximized();
            else if (mMax == isMaximized())
                mIsPolished = true;
            break;
        }
        default:
            break;
    }
    return result;
}


void VBoxVMInformationDlg::keyPressEvent (QKeyEvent *aEvent)
{
    if (aEvent->state() == 0 ||
        (aEvent->state() & Keypad && aEvent->key() == Key_Enter))
    {
        switch (aEvent->key())
        {
            /* processing the return keypress for the auto-default button */
            case Key_Enter:
            case Key_Return:
            {
                QPushButton *currentDefault = searchDefaultButton();
                if (currentDefault)
                    currentDefault->animateClick();
                break;
            }
            /* processing the escape keypress as the close dialog action */
            case Key_Escape:
            {
                close();
                break;
            }
        }
    }
    else
        aEvent->ignore();
}


void VBoxVMInformationDlg::showEvent (QShowEvent *aEvent)
{
    QMainWindow::showEvent (aEvent);

    /* one may think that QWidget::polish() is the right place to do things
     * below, but apparently, by the time when QWidget::polish() is called,
     * the widget style & layout are not fully done, at least the minimum
     * size hint is not properly calculated. Since this is sometimes necessary,
     * we provide our own "polish" implementation. */

    if (mIsPolished)
        return;

    /* load window size and state */
    resize (mWidth, mHeight);
    if (mMax)
        QTimer::singleShot (0, this, SLOT (showMaximized()));
    else
        mIsPolished = true;

    VBoxGlobal::centerWidget (this, parentWidget());
}


void VBoxVMInformationDlg::resizeEvent (QResizeEvent*)
{
    /* adjust the size-grip location for the current resize event */
    mSizeGrip->move (centralWidget()->rect().bottomRight() -
                     QPoint (mSizeGrip->rect().width() - 1,
                     mSizeGrip->rect().height() - 1));

    /* store dialog size for this vm */
    if (mIsPolished && !isMaximized())
    {
        mWidth = width();
        mHeight = height();
    }
}


void VBoxVMInformationDlg::updateDetails()
{
    /* details page update */
    mDetailsText->setText (
        vboxGlobal().detailsReport (mSession.GetMachine(), false /* isNewVM */,
                                    false /* withLinks */, false /* refresh */));
}


void VBoxVMInformationDlg::onPageChanged (QWidget *aPage)
{
    /* focusing the browser on shown page */
    aPage->setFocus();
}


void VBoxVMInformationDlg::processStatistics()
{
    CMachineDebugger dbg = mSession.GetConsole().GetDebugger();
    QString info;

    /* Look for all statistics for filtering purposes. */
    // dbg.GetStats ("*", false, info);
    // mDefStatText->setText (info);

    /* Process selected statistics: */
    for (DataMapType::const_iterator it = mNamesMap.begin();
         it != mNamesMap.end(); ++ it)
    {
        dbg.GetStats (it.key(), true, info);
        mValuesMap [it.key()] = parseStatistics (info);
    }

    /* Statistics page update. */
    refreshStatistics();
}


QString VBoxVMInformationDlg::parseStatistics (const QString &aText)
{
    /* Filters the statistic counters body. */
    QRegExp query ("^.+<Statistics>\n(.+)\n</Statistics>.*$");
    if (query.search (aText) == -1)
        return QString::null;

    QStringList wholeList = QStringList::split ("\n", query.cap (1));

    ULONG64 summa = 0;
    for (QStringList::Iterator lineIt = wholeList.begin();
         lineIt != wholeList.end(); ++ lineIt)
    {
        QString text = *lineIt;
        text.remove (1, 1);
        text.remove (text.length() - 2, 2);

        /* Parse incoming counter and fill the counter-element values. */
        CounterElementType counter;
        counter.type = text.section (" ", 0, 0);
        text = text.section (" ", 1);
        QStringList list = QStringList::split ("\" ", text);
        for (QStringList::Iterator it = list.begin(); it != list.end(); ++ it)
        {
            QString pair = *it;
            QRegExp regExp ("^(.+)=\"([^\"]*)\"?$");
            regExp.search (pair);
            counter.list.insert (regExp.cap (1), regExp.cap (2));
        }

        /* Fill the output with the necessary counter's value.
         * Currently we are using "c" field of simple counter only. */
        QString result = counter.list.contains ("c") ? counter.list ["c"] : "0";
        summa += result.toULongLong();
    }

    return QString::number (summa);
}


void VBoxVMInformationDlg::refreshStatistics()
{
    if (mSession.isNull())
        return;

    QString table = "<p><table border=0 cellspacing=0 cellpadding=0 width=100%>%1</table></p>";
    QString hdrRow = "<tr><td align=left><img src='%1'></td><td colspan=3><b>%2</b></td></tr>";
    QString bdyRow = "<tr><td></td><td><nobr>%1</nobr></td><td colspan=2><nobr>%2</nobr></td></tr>";
    QString paragraph = "<tr><td colspan=4></td></tr>";
    QString result;

    CMachine m = mSession.GetMachine();

    /* Screen & VT-X Runtime Parameters */
    {
        CConsole console = mSession.GetConsole();
        ULONG bpp = console.GetDisplay().GetBitsPerPixel();
        QString resolution = QString ("%1x%2")
            .arg (console.GetDisplay().GetWidth())
            .arg (console.GetDisplay().GetHeight());
        if (bpp)
            resolution += QString ("x%1").arg (bpp);
        QString virt = console.GetDebugger().GetHWVirtExEnabled() ?
            VBoxGlobal::tr ("Enabled", "details report (VT-x/AMD-V)") :
            VBoxGlobal::tr ("Disabled", "details report (VT-x/AMD-V)");
        QString addInfo = console.GetGuest().GetAdditionsVersion();
        uint addVersion = addInfo.toUInt();
        QString addVerisonStr = !addInfo.isNull() ?
            tr ("Version %1.%2", "guest additions")
                .arg (RT_HIWORD (addVersion)).arg (RT_LOWORD (addVersion)) :
            tr ("Not Detected", "guest additions");
        QString osType = console.GetGuest().GetOSTypeId();
        if (osType.isNull())
            osType = tr ("Not Detected", "guest os type");
        else
            osType = vboxGlobal().vmGuestOSTypeDescription (osType);

        result += hdrRow.arg ("state_running_16px.png").arg (tr ("Runtime Attributes"));
        result += bdyRow.arg (tr ("Screen Resolution")).arg (resolution) +
                  bdyRow.arg (VBoxGlobal::tr ("VT-x/AMD-V", "details report")).arg (virt);
        result += bdyRow.arg (tr ("Guest Additions")).arg (addVerisonStr);
        result += bdyRow.arg (tr ("Guest OS Type")).arg (osType);
        result += paragraph;
    }

    /* Hard Disk Statistics. */
    {
        QString hdStat;

        result += hdrRow.arg ("hd_16px.png").arg (tr ("Hard Disk Statistics"));

        /* IDE Hard Disk (Primary Master) */
        if (!m.GetHardDisk (KStorageBus_IDE, 0, 0).isNull())
        {
            hdStat += formatHardDisk (KStorageBus_IDE, 0, 0, "IDE00");
            hdStat += paragraph;
        }

        /* IDE Hard Disk (Primary Slave) */
        if (!m.GetHardDisk (KStorageBus_IDE, 0, 1).isNull())
        {
            hdStat += formatHardDisk (KStorageBus_IDE, 0, 1, "IDE01");
            hdStat += paragraph;
        }

        /* IDE Hard Disk (Secondary Slave) */
        if (!m.GetHardDisk (KStorageBus_IDE, 1, 1).isNull())
        {
            hdStat += formatHardDisk (KStorageBus_IDE, 1, 1, "IDE11");
            hdStat += paragraph;
        }

        /* SATA Hard Disks */
        for (int i = 0; i < 30; ++ i)
        {
            if (!m.GetHardDisk (KStorageBus_SATA, i, 0).isNull())
            {
                hdStat += formatHardDisk (KStorageBus_SATA, i, 0,
                                          QString ("SATA%1").arg (i));
                hdStat += paragraph;
            }
        }

        /* If there are no Hard Disks */
        if (hdStat.isNull())
        {
            hdStat = composeArticle (tr ("No Hard Disks"));
            hdStat += paragraph;
        }

        result += hdStat;

        /* CD/DVD-ROM (Secondary Master) */
        result += hdrRow.arg ("cd_16px.png").arg (tr ("CD/DVD-ROM Statistics"));
        result += formatHardDisk (KStorageBus_IDE, 1, 0, "IDE10");
        result += paragraph;
    }

    /* Network Adapters Statistics. */
    {
        QString naStat;

        result += hdrRow.arg ("nw_16px.png")
            .arg (tr ("Network Adapter Statistics"));

        /* Network Adapters list */
        ulong count = vboxGlobal().virtualBox()
                      .GetSystemProperties().GetNetworkAdapterCount();
        for (ulong slot = 0; slot < count; ++ slot)
        {
            if (m.GetNetworkAdapter (slot).GetEnabled())
            {
                naStat += formatAdapter (slot, QString ("NA%1").arg (slot));
                naStat += paragraph;
            }
        }

        /* If there are no Network Adapters */
        if (naStat.isNull())
        {
            naStat = composeArticle (tr ("No Network Adapters"));
            naStat += paragraph;
        }

        result += naStat;
    }

    /* Show full composed page. */
    mStatisticText->setText (table.arg (result));
}


QString VBoxVMInformationDlg::formatHardDisk (KStorageBus aBus,
                                              LONG aChannel,
                                              LONG aDevice,
                                              const QString &aBelongsTo)
{
    if (mSession.isNull())
        return QString::null;

    CHardDisk hd = mSession.GetMachine().GetHardDisk (aBus, aChannel, aDevice);
    QString header = "<tr><td></td><td colspan=3><nobr><u>%1</u></nobr></td></tr>";
    QString name = vboxGlobal().toFullString (aBus, aChannel, aDevice);
    QString result = hd.isNull() ? QString::null : header.arg (name);
    result += composeArticle (aBelongsTo);
    return result;
}

QString VBoxVMInformationDlg::formatAdapter (ULONG aSlot,
                                             const QString &aBelongsTo)

{
    if (mSession.isNull())
        return QString::null;

    QString header = "<tr><td></td><td colspan=3><nobr><u>%1</u></nobr></td></tr>";
    QString name = VBoxGlobal::tr ("Adapter %1", "details report (network)").arg (aSlot);
    QString result = header.arg (name);
    result += composeArticle (aBelongsTo);
    return result;
}


QString VBoxVMInformationDlg::composeArticle (const QString &aBelongsTo)
{
    QString body = "<tr><td></td><td><nobr>%1</nobr></td><td align=right>"
                   "<nobr>%2%3</nobr></td><td width=100%></td></tr>";
    QString result;

    if (mLinksMap.contains (aBelongsTo))
    {
        QStringList keyList = mLinksMap [aBelongsTo];
        for (QStringList::Iterator it = keyList.begin(); it != keyList.end(); ++ it)
        {
            QString line (body);
            QString key = *it;
            if (mNamesMap.contains (key) &&
                mValuesMap.contains (key) &&
                mUnitsMap.contains (key))
            {
                line = line.arg (mNamesMap [key])
                           .arg (QString ("%L1")
                                 .arg (mValuesMap [key].toULongLong()));
                line = mUnitsMap [key].contains (QRegExp ("\\[\\S+\\]")) ?
                    line.arg (QString ("<img src=tpixel.png width=%1 height=1>")
                              .arg (QApplication::fontMetrics().width (
                              QString (" %1").arg (mUnitsMap [key]
                              .mid (1, mUnitsMap [key].length() - 2))))) :
                    line.arg (QString (" %1").arg (mUnitsMap [key]));
                result += line;
            }
        }
    }
    else
        result = body.arg (aBelongsTo).arg (QString::null).arg (QString::null);

    return result;
}