#include "minidisplay.h"

 #include <QPainter>

 #include <QTimer>

 const int KMaxReadAttempt=100;

 MiniDisplay::MiniDisplay(QQuickItem *parent):

     QQuickItem(parent),iReadAttempt(0),iBrightness(0)

 {

     // By default, QQuickItem does not draw anything. If you subclass

     // QQuickItem to create a visual item, you will need to uncomment the

     // following line and re-implement updatePaintNode()

     // setFlag(ItemHasContents, true);

     //

     //qDebug() << "New MiniDisplay";

 }

 MiniDisplay::~MiniDisplay()

 {

     //qDebug() << "Delete MiniDisplay";

     close();

 }

 void MiniDisplay::open()

 {

     if (iDisplay.Open())

     {

         iDisplay.SetBrightness(iBrightness);

         emit opened();

         emit statusChanged();

     }

     else

     {

         emit openError();

     }

 }

 void MiniDisplay::close()

 {

     //qDebug() << "MiniDisplay::close";

     //Try to put back ourframe position to RAM 0,0 which is a multiple of 128

     if (iDisplay.IsOpen())

     {

         emit closing();

         if (iDisplay.DisplayPositionY()%128!=0)

         {

             //qDebug() << "SwapBuffer to put back our frame position to zero " << iDisplay.DisplayPositionY();

             iDisplay.SwapBuffers();

         }

     }

     iDisplay.Close();

     emit closed();

     emit statusChanged();

 }

 bool MiniDisplay::isOpen()

 {

     return iDisplay.IsOpen();

 }

 void MiniDisplay::clear()

 {

     if (!iDisplay.IsOpen()) return;

     //

     iDisplay.Clear();

 }

 void MiniDisplay::fill()

 {

     if (!iDisplay.IsOpen()) return;

     //

     iDisplay.SetAllPixels(0xFF);

 }

 void MiniDisplay::swapBuffers()

 {

     if (!iDisplay.IsOpen()) return;

     //

     iDisplay.SwapBuffers();

 }

 void MiniDisplay::requestPowerStatus()

 {

     if (!iDisplay.IsOpen()) return;

     iDisplay.RequestPowerSupplyStatus();

     QTimer::singleShot(4, this, SLOT(readTimer()));

     iReadAttempt=0;

 }

 void MiniDisplay::requestDeviceId()

 {

     if (!iDisplay.IsOpen()) return;

     iDisplay.RequestDeviceId();

     QTimer::singleShot(4, this, SLOT(readTimer()));

     iReadAttempt=0;

 }

 void MiniDisplay::requestFirmwareVersion()

 {

     if (!iDisplay.IsOpen()) return;

     iDisplay.RequestFirmwareRevision();

     QTimer::singleShot(4, this, SLOT(readTimer()));

     iReadAttempt=0;

 }

 /**

  * @brief setFont

  * @param aFont

  */

 void MiniDisplay::setFont(const QFont& aFont)

 {

     iFont=aFont;

     iFont.setStyleStrategy(QFont::NoAntialias);

     QString strDemo="0123456789ABCDEF";

     QFontMetrics metrics(iFont);

     int w=metrics.width(strDemo);

     int h=metrics.height();

     QSize size(w,h);

     QImage image(size,QImage::Format_Mono);

     image.fill(0xFFFFFFFF);

     //Draw some text into our image

     {

         QPainter painter(&image);

         //painter.begin(&image);

         painter.setPen(0xFF000000);

         painter.setFont(iFont);

         painter.drawText(0,metrics.ascent(),strDemo);

     }

     //Save image as PNG for validation

     image.save("font.png");

     //

     //int sizeInBytes=image.byteCount();

     int pixelCount=w*h;

     BitArray bits(pixelCount);

     for (int i=0;i<w;i++)

         {

         for (int j=0;j<h;j++)

             {

             QRgb color=image.pixel(i,j);

             if (color!=0xffffffff)

                 {

                 bits.SetBit(i*h+j);

                 }

             }

         }

     if (iDisplay.IsOpen())

     {

         iDisplay.Clear();

         iDisplay.BitBlit(bits,w,h,0,0);

         iDisplay.SwapBuffers();

     }

     //

 }

 QString MiniDisplay::vendor()

 {

     return QString::fromWCharArray(iDisplay.Vendor());

 }

 QString MiniDisplay::product()

 {

     return QString::fromWCharArray(iDisplay.Product());

 }

 QString MiniDisplay::serialNumber()

 {

     return QString::fromWCharArray(iDisplay.SerialNumber());

 }

 /**

  * @brief MiniDisplay::readTimer

  * Called when our read timer completes.

  * We then attempt to complete our pending display request.

  * We typically attempt to read an input report from our HID device.

  */

 void MiniDisplay::readTimer()

 {

     if (!iDisplay.IsOpen()) return;

     if (!iDisplay.RequestPending()) return;

     iReadAttempt++;

     GP1212A01A::Request request = iDisplay.AttemptRequestCompletion();

     if (!request)

     {

         if (iReadAttempt<KMaxReadAttempt)

         {

             //Will try again later

             QTimer::singleShot(4, this, SLOT(readTimer()));

         }

         return;

     }

     //TODO: Find a way to remove device specific stuff from here

     if (request==GP1212A01A::ERequestFirmwareRevision)

     {

         QString version=QString::fromLocal8Bit((const char*)iDisplay.InputReport().Buffer()+1);

         emit firmwareVersion(version);

     }

     else if (request==GP1212A01A::ERequestDeviceId)

     {

         QString id=QString::fromLocal8Bit((const char*)iDisplay.InputReport().Buffer()+1);

         emit deviceId(id);

     }

     else if (request==GP1212A01A::ERequestPowerSupplyStatus)

     {

         emit powerStatus(iDisplay.PowerOn());

     }

 }

 int MiniDisplay::maxBrightness() const

 {

     return iDisplay.MaxBrightness();

 }

 int MiniDisplay::minBrightness() const

 {

     return iDisplay.MinBrightness();

 }

 int MiniDisplay::brightness() const

 {

     return iBrightness;

 }

 void MiniDisplay::setBrightness(int aBrightness)

 {

     //Still track the brightness when disconnected

     iBrightness=aBrightness;

     if (!iDisplay.IsOpen()) return;

     iDisplay.SetBrightness(aBrightness);

 }

 QPoint MiniDisplay::framePosition() const

 {

     return QPoint(iDisplay.DisplayPositionX(),iDisplay.DisplayPositionX());

 }

 void MiniDisplay::setFramePosition(const QPoint& aPoint)

 {

     iFramePosition = aPoint;

     if (!iDisplay.IsOpen()) return;

     iDisplay.SetDisplayPosition(aPoint.x(),aPoint.y());

 }