#ifndef WATERFALL_GLOBAL_DATA_CPP
#define WATERFALL_GLOBAL_DATA_CPP

#include <waterfallGlobalData.h>

WaterfallData::WaterfallData(const double minimumFrequency,
			     const double maximumFrequency,
			     const uint64_t fftPoints,
			     const unsigned int historyExtent)
  : QwtRasterData(QwtDoubleRect(minimumFrequency /* X START */,  0 /* Y START */, 
				maximumFrequency - minimumFrequency /* WIDTH */,  
				static_cast<double>(historyExtent)/* HEIGHT */))
{
  _intensityRange = QwtDoubleInterval(-200.0, 0.0);
  
  _fftPoints = fftPoints;
  _historyLength = historyExtent;

  _spectrumData = new double[_fftPoints * _historyLength];

  Reset();
}

WaterfallData::~WaterfallData()
{
  delete[] _spectrumData;
}

void WaterfallData::Reset()
{
  memset(_spectrumData, 0x0, _fftPoints*_historyLength*sizeof(double));

  _numLinesToUpdate = -1;
}

void WaterfallData::Copy(const WaterfallData* rhs)
{
  if((_fftPoints != rhs->GetNumFFTPoints()) ||
     (boundingRect() != rhs->boundingRect()) ){
    _fftPoints = rhs->GetNumFFTPoints();
    setBoundingRect(rhs->boundingRect());
    delete[] _spectrumData;
    _spectrumData = new double[_fftPoints * _historyLength];
  }
  Reset();
  SetSpectrumDataBuffer(rhs->GetSpectrumDataBuffer());
  SetNumLinesToUpdate(rhs->GetNumLinesToUpdate());
  setRange(rhs->range());
}

void WaterfallData::ResizeData(const double startFreq,
			       const double stopFreq,
			       const uint64_t fftPoints)
{
  if((fftPoints != GetNumFFTPoints()) ||
     (boundingRect().width() != (stopFreq - startFreq)) ||
     (boundingRect().left() != startFreq)){

    setBoundingRect(QwtDoubleRect(startFreq, 0, stopFreq-startFreq, boundingRect().height()));
    _fftPoints = fftPoints;
    delete[] _spectrumData;
    _spectrumData = new double[_fftPoints * _historyLength];
  }
   
  Reset();
}

QwtRasterData *WaterfallData::copy() const
{
  WaterfallData* returnData =  new WaterfallData(boundingRect().left(),
						 boundingRect().right(),
						 _fftPoints, _historyLength);
  returnData->Copy(this);
  return returnData;
}

QwtDoubleInterval WaterfallData::range() const
{
  return _intensityRange;
}

void WaterfallData::setRange(const QwtDoubleInterval& newRange)
{
  _intensityRange = newRange;
}

double WaterfallData::value(double x, double y) const
{
  double returnValue = 0.0;

  const unsigned int intY = static_cast<unsigned int>((1.0 - (y/boundingRect().height())) * 
						      static_cast<double>(_historyLength - 1));
  const unsigned int intX = static_cast<unsigned int>((((x - boundingRect().left()) / boundingRect().width()) * 
						       static_cast<double>(_fftPoints-1)) + 0.5);

  const int location = (intY * _fftPoints) + intX;
  if((location > -1) && (location < static_cast<int64_t>(_fftPoints * _historyLength))){
    returnValue = _spectrumData[location];
  }

  return returnValue;
}

uint64_t WaterfallData::GetNumFFTPoints() const
{
  return _fftPoints;
}

void WaterfallData::addFFTData(const double* fftData,
			       const uint64_t fftDataSize,
			       const int droppedFrames){
  if(fftDataSize == _fftPoints){
    int64_t heightOffset = _historyLength - 1 - droppedFrames;
    uint64_t drawingDroppedFrames = droppedFrames;

    // Any valid data rolled off the display so just fill in zeros and write new data
    if(heightOffset < 0){
      heightOffset = 0;
      drawingDroppedFrames = static_cast<uint64_t>(_historyLength-1);
    }
    
    // Copy the old data over if any available
    if(heightOffset > 0){
      memmove( _spectrumData, &_spectrumData[(drawingDroppedFrames+1) * _fftPoints],
	       heightOffset * _fftPoints * sizeof(double)) ;
    }

    if(drawingDroppedFrames > 0){
      // Fill in zeros data for dropped data
      memset(&_spectrumData[heightOffset * _fftPoints], 0x00,
	     static_cast<int64_t>(drawingDroppedFrames) * _fftPoints * sizeof(double));
    }

    // add the new buffer
    memcpy(&_spectrumData[(_historyLength - 1) * _fftPoints], fftData, _fftPoints*sizeof(double));
  }
}

double* WaterfallData::GetSpectrumDataBuffer() const
{
  return _spectrumData;
}

void WaterfallData::SetSpectrumDataBuffer(const double* newData)
{
  memcpy(_spectrumData, newData, _fftPoints * _historyLength * sizeof(double));
}

int WaterfallData::GetNumLinesToUpdate() const
{
  return _numLinesToUpdate;
}

void WaterfallData::SetNumLinesToUpdate(const int newNum)
{
  _numLinesToUpdate = newNum;
}

void WaterfallData::IncrementNumLinesToUpdate()
{
  _numLinesToUpdate++;
}

#endif /* WATERFALL_GLOBAL_DATA_CPP */