#include "trandom.h"
#include "tfxparam.h"
#include "stdfx.h"

class NoiseFx : public TStandardRasterFx
{
	FX_PLUGIN_DECLARATION(NoiseFx)

	TRasterFxPort m_input;
	TDoubleParamP m_value;
	TBoolParamP m_Red;
	TBoolParamP m_Green;
	TBoolParamP m_Blue;
	TBoolParamP m_BW;
	TBoolParamP m_Animate;

public:
	NoiseFx()
		: m_value(100.0), m_Red(1.0), m_Green(1.0), m_Blue(1.0), m_BW(0.0), m_Animate(0.0)
	{
		bindParam(this, "Intensity", m_value);
		bindParam(this, "Red", m_Red);
		bindParam(this, "Green", m_Green);
		bindParam(this, "Blue", m_Blue);
		bindParam(this, "Black_White", m_BW);
		bindParam(this, "Animate", m_Animate);
		addInputPort("Source", m_input);
		m_value->setValueRange(0, (std::numeric_limits<double>::max)());
	}

	~NoiseFx(){};

	bool doGetBBox(double frame, TRectD &bBox, const TRenderSettings &info)
	{
		if (m_input.isConnected())
			return m_input->doGetBBox(frame, bBox, info);
		else {
			bBox = TRectD();
			return false;
		}
	}

	void doCompute(TTile &tile, double frame, const TRenderSettings &ri);
	std::string getAlias(double frame, const TRenderSettings &info) const;

	bool canHandle(const TRenderSettings &info, double frame) { return true; }
};

//------------------------------------------------------------------------------

namespace
{
template <class PIXEL>
class RayleighNoise
{
	std::vector<double> noise_buf;

public:
	RayleighNoise(double sigma, int seed = 0)
	{
		noise_buf.resize(PIXEL::maxChannelValue + 1);
		TRandom random(seed);
		sigma = log(sigma * 0.07 + 1);
		if (PIXEL::maxChannelValue == 255)
			sigma = 2.0 * sigma * sigma * sigma * sigma;
		else
			sigma = 257.0 * 2.0 * sigma * sigma * sigma * sigma;
		for (int i = 0; i < PIXEL::maxChannelValue + 1; i++) {
			noise_buf[i] = sigma * sqrt(-log(1.0 - random.getFloat())) *
						   cos(TConsts::pi * (2.0 * random.getFloat() - 1.0));
		}
	}
	double get_value(int index)
	{
		tcrop(index, 0, PIXEL::maxChannelValue);
		return noise_buf[index];
	}
};
}

template <typename PIXEL, typename PIXELGRAY, typename CHANNEL_TYPE>
void doNoise(TRasterPT<PIXEL> &ras, double sigma, bool bw, bool red, bool green, bool blue,
			 bool animate, double frame)
{
	RayleighNoise<PIXEL> noise(sigma);

	TRandom random;
	if (animate)
		random.setSeed(frame);
	int j;
	ras->lock();
	for (j = 0; j < ras->getLy(); j++) {
		PIXEL *pix = ras->pixels(j);
		PIXEL *endPix = pix + ras->getLx();
		while (pix < endPix) {

			if (bw) {
				double index;
				double value;
				index = random.getFloat() * pix->m; //PIXEL::maxChannelValue;
				value = noise.get_value(tfloor(index));

				//value = (value<pix->m)?((value>0)?(int)value:0):PIXEL::maxChannelValue;
				//if(value)
				//{
				int reference;
				reference = PIXELGRAY::from(*pix).value;
				pix->r = tcrop<int>(value + reference, 0, pix->m);
				pix->g = tcrop<int>(value + reference, 0, pix->m);
				pix->b = tcrop<int>(value + reference, 0, pix->m);
				//}
			} else {
				double r, g, b, index;
				if (red) {
					index = random.getFloat() * pix->m; //PIXEL::maxChannelValue;
					r = noise.get_value(tfloor(index)) + pix->r;
					pix->r = tcrop<int>(r, 0, pix->m);
				}
				if (green) {
					index = random.getFloat() * pix->m; //PIXEL::maxChannelValue;
					g = noise.get_value(tfloor(index)) + pix->g;
					pix->g = tcrop<int>(g, 0, pix->m);
				}
				if (blue) {
					index = random.getFloat() * pix->m; //PIXEL::maxChannelValue;
					b = noise.get_value(tfloor(index)) + pix->b;
					pix->b = tcrop<int>(b, 0, pix->m);
				}
			}
			*pix++;
		}
	}

	ras->unlock();
}

//-------------------------------------------------------------------

void NoiseFx::doCompute(TTile &tile, double frame, const TRenderSettings &ri)
{
	if (!m_input.isConnected())
		return;

	m_input->compute(tile, frame, ri);

	double sigma = m_value->getValue(frame);
	bool bw = m_BW->getValue();
	bool red = m_Red->getValue();
	bool green = m_Green->getValue();
	bool blue = m_Blue->getValue();
	bool animate = m_Animate->getValue();
	if (sigma == 0.0)
		return;

	TRaster32P raster32 = tile.getRaster();
	if (raster32)
		doNoise<TPixel32, TPixelGR8, UCHAR>(raster32, sigma, bw, red, green, blue, animate, frame);
	else {
		TRaster64P raster64 = tile.getRaster();
		if (raster64)
			doNoise<TPixel64, TPixelGR16, USHORT>(raster64, sigma, bw, red, green, blue, animate, frame);
		else
			throw TException("Brightness&Contrast: unsupported Pixel Type");
	}
}
//------------------------------------------------------------------

std::string NoiseFx::getAlias(double frame, const TRenderSettings &info) const
{
	std::string alias = getFxType();
	alias += "[";

	// alias degli effetti connessi alle porte di input separati da virgole
	// una porta non connessa da luogo a un alias vuoto (stringa vuota)
	int i = 0;

	for (i = 0; i < getInputPortCount(); i++) {
		TFxPort *port = getInputPort(i);
		if (port->isConnected()) {
			TRasterFxP ifx = port->getFx();
			assert(ifx);
			alias += ifx->getAlias(frame, info);
		}
		alias += ",";
	}

	bool addframe = 0;
	std::string paramalias("");
	for (i = 0; i < getParams()->getParamCount(); i++) {
		TParam *param = getParams()->getParam(i);
		paramalias += param->getName() + "=" + param->getValueAlias(frame, 3);
		if (param->getName() == "Animate" && param->getValueAlias(frame, 0) == "1")
			addframe = true;
	}

	if (addframe)
		alias += std::to_string(frame) + ",";
	alias += paramalias + "]";

	return alias;
}

//------------------------------------------------------------------

FX_PLUGIN_IDENTIFIER(NoiseFx, "noiseFx")