#ifndef WATERFALL_DISPLAY_PLOT_C
#define WATERFALL_DISPLAY_PLOT_C

#include <WaterfallDisplayPlot.h>

#include <qwt_color_map.h>
#include <qwt_scale_widget.h>
#include <qwt_scale_draw.h>
#include <qwt_plot_zoomer.h>
#include <qwt_plot_panner.h>
#include <qwt_plot_layout.h>

#include <qapplication.h>

class FreqOffsetAndPrecisionClass
{
public:
  FreqOffsetAndPrecisionClass(const int freqPrecision){
    _frequencyPrecision = freqPrecision;
    _centerFrequency = 0;
  }

  virtual ~FreqOffsetAndPrecisionClass(){

  }

  virtual unsigned int GetFrequencyPrecision()const{
    return _frequencyPrecision;
  }

  virtual void SetFrequencyPrecision(const unsigned int newPrecision){
    _frequencyPrecision = newPrecision;
  }

  virtual double GetCenterFrequency()const{
    return _centerFrequency;
  }

  virtual void SetCenterFrequency(const double newFreq){
    _centerFrequency = newFreq;
  }

protected:
  unsigned int _frequencyPrecision;
  double _centerFrequency;

private:

};

class WaterfallFreqDisplayScaleDraw: public QwtScaleDraw, public FreqOffsetAndPrecisionClass{
public:
  WaterfallFreqDisplayScaleDraw(const unsigned int precision):QwtScaleDraw(), FreqOffsetAndPrecisionClass(precision){

  }

  virtual ~WaterfallFreqDisplayScaleDraw(){

  }

  QwtText label(double value)const{
    return QString("%1").arg((value + GetCenterFrequency()) / ((GetFrequencyPrecision() == 0) ? 1.0 : 1000.0), 0, 'f', GetFrequencyPrecision());
  }

  virtual void initiateUpdate(){
    invalidateCache();
  }

protected:

private:

};

class TimeScaleData
{
public:
  TimeScaleData(){
    timespec_reset(&_zeroTime);
    _secondsPerLine = 1.0;
    
  }
  
  virtual ~TimeScaleData(){
    
  }

  virtual timespec GetZeroTime()const{
    return _zeroTime;
  }
  
  virtual void SetZeroTime(const timespec newTime){
    _zeroTime = newTime;
  }

  virtual void SetSecondsPerLine(const double newTime){
    _secondsPerLine = newTime;
  }

  virtual double GetSecondsPerLine()const{
    return _secondsPerLine;
  }

  
protected:
  timespec _zeroTime;
  double _secondsPerLine;
  
private:
  
};

class QwtTimeScaleDraw: public QwtScaleDraw, public TimeScaleData
{
public:
  QwtTimeScaleDraw():QwtScaleDraw(),TimeScaleData(){
    
  }

  virtual ~QwtTimeScaleDraw(){
    
  }

  virtual QwtText label(double value)const{
    QwtText returnLabel("");

    timespec lineTime = timespec_add(GetZeroTime(), (-value) * GetSecondsPerLine());
    struct tm timeTm;
    gmtime_r(&lineTime.tv_sec, &timeTm);
    returnLabel = (QString("").sprintf("%04d/%02d/%02d\n%02d:%02d:%02d.%03ld", timeTm.tm_year+1900, timeTm.tm_mon+1, timeTm.tm_mday, timeTm.tm_hour, timeTm.tm_min, timeTm.tm_sec, lineTime.tv_nsec/1000000));
    
    return returnLabel;
  }

  virtual void initiateUpdate(){
    // Do this in one call rather than when zeroTime and secondsPerLine updates is to prevent the display from being updated too often...
    invalidateCache();
  }
  
protected:

private:

};

class WaterfallZoomer: public QwtPlotZoomer, public TimeScaleData, public FreqOffsetAndPrecisionClass
{
public:
  WaterfallZoomer(QwtPlotCanvas* canvas, const unsigned int freqPrecision):QwtPlotZoomer(canvas), TimeScaleData(), FreqOffsetAndPrecisionClass(freqPrecision)
  {
    setTrackerMode(QwtPicker::AlwaysOn);
  }

  virtual ~WaterfallZoomer(){

  }
  
  virtual void updateTrackerText(){
    updateDisplay();
  }

protected:
  virtual QwtText trackerText( const QwtDoublePoint& p ) const 
  {
    QString yLabel("");

    timespec lineTime = timespec_add(GetZeroTime(), (-p.y()) * GetSecondsPerLine());
    struct tm timeTm;
    gmtime_r(&lineTime.tv_sec, &timeTm);
    yLabel = (QString("").sprintf("%04d/%02d/%02d %02d:%02d:%02d.%03ld", timeTm.tm_year+1900, timeTm.tm_mon+1, timeTm.tm_mday, timeTm.tm_hour, timeTm.tm_min, timeTm.tm_sec, lineTime.tv_nsec/1000000));

    QwtText t(QString("%1 %2, %3").arg((p.x() + GetCenterFrequency()) / ((GetFrequencyPrecision() == 0) ? 1.0 : 1000.0), 0, 'f', GetFrequencyPrecision()).arg( (GetFrequencyPrecision() == 0) ? "Hz" : "kHz").arg(yLabel));

    return t;
  }
};


const int WaterfallDisplayPlot::INTENSITY_COLOR_MAP_TYPE_MULTI_COLOR;
const int WaterfallDisplayPlot::INTENSITY_COLOR_MAP_TYPE_WHITE_HOT;
const int WaterfallDisplayPlot::INTENSITY_COLOR_MAP_TYPE_BLACK_HOT;
const int WaterfallDisplayPlot::INTENSITY_COLOR_MAP_TYPE_INCANDESCENT;
const int WaterfallDisplayPlot::INTENSITY_COLOR_MAP_TYPE_USER_DEFINED;

WaterfallDisplayPlot::WaterfallDisplayPlot(QWidget* parent):QwtPlot(parent){
  _zoomer = NULL;
  _startFrequency = 0;
  _stopFrequency = 4000;
  
  resize(parent->width(), parent->height());
  _numPoints = 1024;

  _displayIntervalTime = (1.0/5.0); // 1/5 of a second between updates

  _waterfallData = new WaterfallData(_startFrequency, _stopFrequency, _numPoints, 200);

  QPalette palette;
  palette.setColor(canvas()->backgroundRole(), QColor("white"));
  canvas()->setPalette(palette);   

  setAxisTitle(QwtPlot::xBottom, "Frequency (Hz)");
  setAxisScaleDraw(QwtPlot::xBottom, new WaterfallFreqDisplayScaleDraw(0));

  setAxisTitle(QwtPlot::yLeft, "Time");
  setAxisScaleDraw(QwtPlot::yLeft, new QwtTimeScaleDraw());

  timespec_reset(&_lastReplot);

  d_spectrogram = new PlotWaterfall(_waterfallData, "Waterfall Display");

  _intensityColorMapType = INTENSITY_COLOR_MAP_TYPE_MULTI_COLOR;

  QwtLinearColorMap colorMap(Qt::darkCyan, Qt::white);
  colorMap.addColorStop(0.25, Qt::cyan);
  colorMap.addColorStop(0.5, Qt::yellow);
  colorMap.addColorStop(0.75, Qt::red);

  d_spectrogram->setColorMap(colorMap);
  
  d_spectrogram->attach(this);
  
  // LeftButton for the zooming
  // MidButton for the panning
  // RightButton: zoom out by 1
  // Ctrl+RighButton: zoom out to full size
  
  _zoomer = new WaterfallZoomer(canvas(), 0);
#if QT_VERSION < 0x040000
  _zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
			   Qt::RightButton, Qt::ControlModifier);
#else
  _zoomer->setMousePattern(QwtEventPattern::MouseSelect2,
			   Qt::RightButton, Qt::ControlModifier);
#endif
  _zoomer->setMousePattern(QwtEventPattern::MouseSelect3,
			   Qt::RightButton);
  
  _panner = new QwtPlotPanner(canvas());
  _panner->setAxisEnabled(QwtPlot::yRight, false);
  _panner->setMouseButton(Qt::MidButton);
  
  // Avoid jumping when labels with more/less digits
  // appear/disappear when scrolling vertically
  
  const QFontMetrics fm(axisWidget(QwtPlot::yLeft)->font());
  QwtScaleDraw *sd = axisScaleDraw(QwtPlot::yLeft);
  sd->setMinimumExtent( fm.width("100.00") );
  
  const QColor c(Qt::white);
  _zoomer->setRubberBandPen(c);
  _zoomer->setTrackerPen(c);

  _UpdateIntensityRangeDisplay();
}

WaterfallDisplayPlot::~WaterfallDisplayPlot(){
  delete _waterfallData;
}

void WaterfallDisplayPlot::Reset(){
  _waterfallData->ResizeData(_startFrequency, _stopFrequency, _numPoints);
  _waterfallData->Reset();

  // Load up the new base zoom settings
  QwtDoubleRect newSize = _zoomer->zoomBase();
  newSize.setLeft(_startFrequency);
  newSize.setWidth(_stopFrequency-_startFrequency);
  _zoomer->zoom(newSize);
  _zoomer->setZoomBase(newSize);
  _zoomer->zoom(0);
}

void WaterfallDisplayPlot::SetFrequencyRange(const double startFreq, const double stopFreq, const double centerFreq, const bool useCenterFrequencyFlag){
  if((stopFreq > 0) && (stopFreq > startFreq)){
    _startFrequency = startFreq;
    _stopFrequency = stopFreq;

    if((axisScaleDraw(QwtPlot::xBottom) != NULL) && (_zoomer != NULL)){
      WaterfallFreqDisplayScaleDraw* freqScale = ((WaterfallFreqDisplayScaleDraw*)axisScaleDraw(QwtPlot::xBottom));
      freqScale->SetCenterFrequency(centerFreq);
      ((WaterfallZoomer*)_zoomer)->SetCenterFrequency(centerFreq);
      if(useCenterFrequencyFlag){
	freqScale->SetFrequencyPrecision( 3 );
	((WaterfallZoomer*)_zoomer)->SetFrequencyPrecision( 3 );
	setAxisTitle(QwtPlot::xBottom, "Frequency (kHz)");
      }
      else{
	freqScale->SetFrequencyPrecision( 0 );
	((WaterfallZoomer*)_zoomer)->SetFrequencyPrecision( 0 );
	setAxisTitle(QwtPlot::xBottom, "Frequency (Hz)");
      }
    }

    Reset();

    // Only replot if screen is visible
    if(isVisible()){
      replot();
    }
  }
}


double WaterfallDisplayPlot::GetStartFrequency()const{
  return _startFrequency;
}

double WaterfallDisplayPlot::GetStopFrequency()const{
  return _stopFrequency;
}

void WaterfallDisplayPlot::PlotNewData(const double* dataPoints, const int64_t numDataPoints, const double timePerFFT, const timespec timestamp, const int droppedFrames){
  if(numDataPoints > 0){
    if(numDataPoints != _numPoints){
      _numPoints = numDataPoints;

      Reset();

      d_spectrogram->invalidateCache();
      d_spectrogram->itemChanged();

      if(isVisible()){
	replot();
      }

      _lastReplot = get_highres_clock();
    }

    _waterfallData->addFFTData(dataPoints, numDataPoints, droppedFrames);
    _waterfallData->IncrementNumLinesToUpdate();

    QwtTimeScaleDraw* timeScale = (QwtTimeScaleDraw*)axisScaleDraw(QwtPlot::yLeft);
    timeScale->SetSecondsPerLine(timePerFFT);
    timeScale->SetZeroTime(timestamp);

    ((WaterfallZoomer*)_zoomer)->SetSecondsPerLine(timePerFFT);
    ((WaterfallZoomer*)_zoomer)->SetZeroTime(timestamp);
  }

  // Allow at least a 50% duty cycle
  if(diff_timespec(get_highres_clock(), _lastReplot) > _displayIntervalTime){

    d_spectrogram->invalidateCache();
    d_spectrogram->itemChanged();

    // Only update when window is visible
    if(isVisible()){
      replot();
    }

    _lastReplot = get_highres_clock();
  }
}

void WaterfallDisplayPlot::SetIntensityRange(const double minIntensity, const double maxIntensity){
  _waterfallData->setRange(QwtDoubleInterval(minIntensity, maxIntensity));

  emit UpdatedLowerIntensityLevel(minIntensity);
  emit UpdatedUpperIntensityLevel(maxIntensity);

  _UpdateIntensityRangeDisplay();
}

void WaterfallDisplayPlot::replot(){
  const timespec startTime = get_highres_clock();

  QwtTimeScaleDraw* timeScale = (QwtTimeScaleDraw*)axisScaleDraw(QwtPlot::yLeft);
  timeScale->initiateUpdate();

  WaterfallFreqDisplayScaleDraw* freqScale = (WaterfallFreqDisplayScaleDraw*)axisScaleDraw(QwtPlot::xBottom);
  freqScale->initiateUpdate();

  // Update the time axis display
  if(axisWidget(QwtPlot::yLeft) != NULL){
    axisWidget(QwtPlot::yLeft)->update();
  }

  // Update the Frequency Offset Display
  if(axisWidget(QwtPlot::xBottom) != NULL){
    axisWidget(QwtPlot::xBottom)->update();
  }

  if(_zoomer != NULL){
    ((WaterfallZoomer*)_zoomer)->updateTrackerText();
  }

  QwtPlot::replot();

  double differenceTime = (diff_timespec(get_highres_clock(), startTime));
  
  // Require at least a 5% duty cycle
  differenceTime *= 19.0;
  if(differenceTime > (1.0/5.0)){
    _displayIntervalTime = differenceTime;
  }
}

int WaterfallDisplayPlot::GetIntensityColorMapType()const{
  return _intensityColorMapType;
}

void WaterfallDisplayPlot::SetIntensityColorMapType(const int newType, const QColor lowColor, const QColor highColor){
  if((_intensityColorMapType != newType) || 
     ((newType == INTENSITY_COLOR_MAP_TYPE_USER_DEFINED) &&
      (lowColor.isValid() && highColor.isValid()))){
    switch(newType){
    case INTENSITY_COLOR_MAP_TYPE_MULTI_COLOR:{
      _intensityColorMapType = newType;
      QwtLinearColorMap colorMap(Qt::darkCyan, Qt::white);
      colorMap.addColorStop(0.25, Qt::cyan);
      colorMap.addColorStop(0.5, Qt::yellow);
      colorMap.addColorStop(0.75, Qt::red);
      d_spectrogram->setColorMap(colorMap);
      break;
    }
    case INTENSITY_COLOR_MAP_TYPE_WHITE_HOT:{
      _intensityColorMapType = newType;
      QwtLinearColorMap colorMap(Qt::black, Qt::white);
      d_spectrogram->setColorMap(colorMap);
      break;
    }
    case INTENSITY_COLOR_MAP_TYPE_BLACK_HOT:{
      _intensityColorMapType = newType;
      QwtLinearColorMap colorMap(Qt::white, Qt::black);
      d_spectrogram->setColorMap(colorMap);
      break;
    }
    case INTENSITY_COLOR_MAP_TYPE_INCANDESCENT:{
      _intensityColorMapType = newType;
      QwtLinearColorMap colorMap(Qt::black, Qt::white);
      colorMap.addColorStop(0.5, Qt::darkRed);
      d_spectrogram->setColorMap(colorMap);
      break;
    }
    case INTENSITY_COLOR_MAP_TYPE_USER_DEFINED:{
      _userDefinedLowIntensityColor = lowColor;
      _userDefinedHighIntensityColor = highColor;
      _intensityColorMapType = newType;
      QwtLinearColorMap colorMap(_userDefinedLowIntensityColor, _userDefinedHighIntensityColor);
      d_spectrogram->setColorMap(colorMap);
      break;
    }
    default: break;
    }
    
    _UpdateIntensityRangeDisplay();
  }
}

const QColor WaterfallDisplayPlot::GetUserDefinedLowIntensityColor()const{
  return _userDefinedLowIntensityColor;
}

const QColor WaterfallDisplayPlot::GetUserDefinedHighIntensityColor()const{
  return _userDefinedHighIntensityColor;
}

void WaterfallDisplayPlot::_UpdateIntensityRangeDisplay(){
  QwtScaleWidget *rightAxis = axisWidget(QwtPlot::yRight);
  rightAxis->setTitle("Intensity (dB)");
  rightAxis->setColorBarEnabled(true);
  rightAxis->setColorMap(d_spectrogram->data()->range(),
			 d_spectrogram->colorMap());
  
  setAxisScale(QwtPlot::yRight, 
	       d_spectrogram->data()->range().minValue(),
	       d_spectrogram->data()->range().maxValue() );
  enableAxis(QwtPlot::yRight);
  
  plotLayout()->setAlignCanvasToScales(true);

  // Tell the display to redraw everything
  d_spectrogram->invalidateCache();
  d_spectrogram->itemChanged();

  // Draw again
  replot();

  // Update the last replot timer
  _lastReplot = get_highres_clock();
}

#endif /* WATERFALL_DISPLAY_PLOT_C */