#include <sstream> /* std::ostringstream */
#include "tfxparam.h"
#include "stdfx.h"
#include "tfxattributes.h"

#include "ino_common.h"
#include "igs_gaussian_blur.h"
//------------------------------------------------------------
class ino_blur : public TStandardRasterFx
{
	FX_PLUGIN_DECLARATION(ino_blur)
	TRasterFxPort m_input;
	TRasterFxPort m_refer;

	TDoubleParamP m_radius;
	TIntEnumParamP m_ref_mode;

public:
	ino_blur()
		: m_radius(1.0), m_ref_mode(new TIntEnumParam(0, "Red"))
	{
		addInputPort("Source", this->m_input);
		addInputPort("Reference", this->m_refer);

		bindParam(this, "radius", this->m_radius);
		bindParam(this, "reference", this->m_ref_mode);

		this->m_radius->setMeasureName("fxLength");
		this->m_radius->setValueRange(0.0, 1000.0);

		this->m_ref_mode->addItem(1, "Green");
		this->m_ref_mode->addItem(2, "Blue");
		this->m_ref_mode->addItem(3, "Alpha");
		this->m_ref_mode->addItem(4, "Luminance");
		this->m_ref_mode->addItem(-1, "Nothing");
	}
	//------------------------------------------------------------
	double get_render_real_radius(
		const double frame, const TAffine affine)
	{
		/*--- ベクトルにする --- */
		TPointD rend_vect;
		rend_vect.x = this->m_radius->getValue(frame);
		rend_vect.y = 0.0;
		/*--- render用単位にする ---*/
		rend_vect = rend_vect * ino::pixel_per_mm();
		/* 単位変換(mm --> render_pixel) */
		/*--- 回転と拡大縮小のGeometryを反映させる ---*/
		/* 以下は、
toonz/main/sources/stdfx/motionblurfx.cpp
586-592行を参照して書いた
*/
		TAffine aff(affine);
		aff.a13 = aff.a23 = 0; /* 移動変換をしないで... */
		rend_vect = aff * rend_vect;
		/*--- 方向は無視して長さを返す ---*/
		return sqrt(
			rend_vect.x * rend_vect.x + rend_vect.y * rend_vect.y);
	}
	void get_render_enlarge(
		const double frame, const TAffine affine, TRectD &bBox)
	{
		const int margin = igs::gaussian_blur_hv::int_radius(
			this->get_render_real_radius(frame, affine));
		if (0 < margin) {
			bBox = bBox.enlarge(static_cast<double>(margin));
		}
	}
	//------------------------------------------------------------
	bool doGetBBox(
		double frame, TRectD &bBox, const TRenderSettings &info)
	{
		if (false == this->m_input.isConnected()) {
			bBox = TRectD();
			return false;
		}
		const bool ret = this->m_input->doGetBBox(frame, bBox, info);
		this->get_render_enlarge(frame, info.m_affine, bBox);
		return ret;
	}
	int getMemoryRequirement(
		const TRectD &rect, double frame, const TRenderSettings &info)
	{
		TRectD bBox(rect);
		this->get_render_enlarge(frame, info.m_affine, bBox);
		return TRasterFx::memorySize(bBox, info.m_bpp);
	}
	void transform(
		double frame, int port, const TRectD &rectOnOutput, const TRenderSettings &infoOnOutput, TRectD &rectOnInput, TRenderSettings &infoOnInput)
	{
		rectOnInput = rectOnOutput;
		infoOnInput = infoOnOutput;
		this->get_render_enlarge(
			frame, infoOnOutput.m_affine, rectOnInput);
	}
	bool canHandle(
		const TRenderSettings &info, double frame)
	{
		if (0 == this->m_radius->getValue(frame)) {
			return true;
		} else {
			return isAlmostIsotropic(info.m_affine);
		}
	}
	void doCompute(
		TTile &tile, double frame, const TRenderSettings &rend_sets);
};
FX_PLUGIN_IDENTIFIER(ino_blur, "inoBlurFx");
//------------------------------------------------------------
namespace
{
void fx_(
	const TRasterP in_ras // with margin
	,
	TRasterP out_ras // no margin

	,
	const TRasterP refer_ras, const int ref_mode

	,
	const int int_radius, const double real_radius)
{
	TRasterGR8P out_buffer(
		out_ras->getLy(), out_ras->getLx() * ino::channels() *
							  ((TRaster64P)in_ras ? sizeof(unsigned short) : sizeof(unsigned char)));
	const int buffer_bytes = igs::gaussian_blur_hv::buffer_bytes(
		in_ras->getLy(), in_ras->getLx(), int_radius);
	TRasterGR8P cvt_buffer(buffer_bytes, 1);
	out_buffer->lock();
	cvt_buffer->lock();
	igs::gaussian_blur_hv::convert(
		in_ras->getRawData() // const void *in_with_margin (BGRA)
		,
		out_buffer->getRawData() // void *out_no_margin (BGRA)

		,
		in_ras->getLy() // const int height_with_margin
		,
		in_ras->getLx() // const int width_with_margin
		,
		ino::channels() // const int channels
		,
		ino::bits(in_ras) // const int bits

		,
		(((0 <= ref_mode) && (0 != refer_ras)) ? refer_ras->getRawData() : 0) //BGRA
																			  // const unsigned char *ref
		,
		(((0 <= ref_mode) && (0 != refer_ras)) ? ino::bits(refer_ras) : 0)
		// const int ref_bits
		,
		ref_mode // const int ref_mode

		,
		cvt_buffer->getRawData() // void *buffer
		,
		buffer_bytes // int buffer_bytes

		,
		int_radius // const int int_radius
		,
		real_radius // const double real_radius
					// , 0.25
		);
	ino::arr_to_ras(
		out_buffer->getRawData(), ino::channels(), out_ras, 0);
	cvt_buffer->unlock();
	out_buffer->unlock();
}
}
//------------------------------------------------------------
void ino_blur::doCompute(
	TTile &tile, double frame, const TRenderSettings &rend_sets)
{
	/*------ 接続していなければ処理しない ----------------------*/
	if (!this->m_input.isConnected()) {
		tile.getRaster()->clear(); /* 塗りつぶしクリア */
		return;
	}
	/*------ サポートしていないPixelタイプはエラーを投げる -----*/
	if (!((TRaster32P)tile.getRaster()) &&
		!((TRaster64P)tile.getRaster())) {
		throw TRopException("unsupported input pixel type");
	}
	/*------ ボケ足長さの実際の長さをえる ----------------------*/
	const double real_radius = this->get_render_real_radius(
		frame, rend_sets.m_affine);
	const int int_radius = igs::gaussian_blur_hv::int_radius(
		real_radius);
	/*------ ボケ足長さがゼロのときはblur処理しない ------------*/
	if (0 == int_radius) {
		this->m_input->compute(tile, frame, rend_sets);
		return;
	}
	/*------- 動作パラメータを得る -----------------------------*/
	const int ref_mode = this->m_ref_mode->getValue();

	/*------ 表示の範囲を得る ----------------------------------*/
	TRectD bBox = TRectD(
		tile.m_pos /* Render画像上(Pixel単位)の位置 */
		,
		TDimensionD(/* Render画像上(Pixel単位)のサイズ */
					tile.getRaster()->getLx(), tile.getRaster()->getLy()));
	/*------ ぼけ半径(=マージン)分表示範囲を広げる -------------*/
	if (0 < int_radius) {
		bBox = bBox.enlarge(static_cast<double>(int_radius));
	}

	/* ------ margin付き画像生成 ------------------------------ */
	/*
void allocateAndCompute(
TTile &tile
,const TPointD &pos
,const TDimension &size // TDimension = TDimensionI = TDimensionT<int>
,TRasterP templateRas
,double frame
,const TRenderSettings &info
);
*/
	TTile enlarge_tile;
	this->m_input->allocateAndCompute(
		enlarge_tile, bBox.getP00(), TDimensionI(/* Pixel単位に四捨五入 */
												 static_cast<int>(bBox.getLx() + 0.5), static_cast<int>(bBox.getLy() + 0.5)),
		tile.getRaster(), frame, rend_sets);

	/*------ 参照画像生成 --------------------------------------*/
	TTile ref_tile;
	bool ref_sw = false;
	if (this->m_refer.isConnected()) {
		ref_sw = true;
		this->m_refer->allocateAndCompute(
			ref_tile, tile.m_pos /* TPointD */
			,
			tile.getRaster()->getSize() /* Pixel単位 */
			,
			tile.getRaster(), frame, rend_sets);
	}

	/* ------ 保存すべき画像メモリを塗りつぶしクリア ---------- */
	tile.getRaster()->clear(); /* 塗りつぶしクリア */

	/* ------ (app_begin)log記憶 ------------------------------ */
	const bool log_sw = ino::log_enable_sw();

	if (log_sw) {
		std::ostringstream os;
		os << "params"
		   << "  usr_radius " << this->m_radius->getValue(frame)
		   << "  real_radius " << real_radius
		   << "  int_radius " << int_radius
		   << "  ref_mode " << ref_mode
		   << "  tile"
		   << " pos " << tile.m_pos
		   << " w " << tile.getRaster()->getLx()
		   << " h " << tile.getRaster()->getLy()
		   << "  enl_tile"
		   << " w " << enlarge_tile.getRaster()->getLx()
		   << " h " << enlarge_tile.getRaster()->getLy()
		   << "  pixbits " << ino::pixel_bits(tile.getRaster())
		   << "  frame " << frame
		   << "  affine a11 " << rend_sets.m_affine.a11
		   << "  a12 " << rend_sets.m_affine.a12
		   << "  a21 " << rend_sets.m_affine.a21
		   << "  a22 " << rend_sets.m_affine.a22;
		if (ref_sw) {
			os
				<< "  ref_tile"
				<< " pos " << ref_tile.m_pos
				<< " x " << ref_tile.getRaster()->getLx()
				<< " y " << ref_tile.getRaster()->getLy();
		}
	}
	/* ------ fx処理 ------------------------------------------ */
	try {
		tile.getRaster()->lock();
		fx_(enlarge_tile.getRaster() // in with margin
			,
			tile.getRaster() // out with no margin

			,
			ref_tile.getRaster(), ref_mode

			,
			int_radius // margin
			,
			real_radius);
		tile.getRaster()->unlock();
	}
	/* ------ error処理 --------------------------------------- */
	catch (std::bad_alloc &e) {
		tile.getRaster()->unlock();
		if (log_sw) {
			std::string str("std::bad_alloc <");
			str += e.what();
			str += '>';
		}
		throw;
	} catch (std::exception &e) {
		tile.getRaster()->unlock();
		if (log_sw) {
			std::string str("exception <");
			str += e.what();
			str += '>';
		}
		throw;
	} catch (...) {
		tile.getRaster()->unlock();
		if (log_sw) {
			std::string str("other exception");
		}
		throw;
	}
}