/*
 *  This file is part of RawTherapee.
 *
 *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
 *
 *  RawTherapee is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 *  RawTherapee is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <iomanip>
#include "navigator.h"
#include "toolpanel.h"
#include "../rtengine/iccmatrices.h"
#include "../rtengine/iccstore.h"
#include "../rtengine/curves.h"
#include "../rtengine/color.h"
#include "../rtengine/rt_math.h"

using namespace rtengine;

Navigator::Navigator () {

	set_label (M("MAIN_MSG_NAVIGATOR"));
	Gtk::VBox* mbox = Gtk::manage (new Gtk::VBox ());
	previewWindow = Gtk::manage (new PreviewWindow ());
	mbox->pack_start (*previewWindow, Gtk::PACK_SHRINK, 2);
	position = Gtk::manage (new Gtk::Label ());
	mbox->pack_start (*position, Gtk::PACK_SHRINK, 2);

	R = Gtk::manage (new Gtk::Label ());
	G = Gtk::manage (new Gtk::Label ());
	B = Gtk::manage (new Gtk::Label ());
	H = Gtk::manage (new Gtk::Label ());
	S = Gtk::manage (new Gtk::Label ());
	V = Gtk::manage (new Gtk::Label ());
	LAB_A = Gtk::manage (new Gtk::Label ());
	LAB_B = Gtk::manage (new Gtk::Label ());
	LAB_L = Gtk::manage (new Gtk::Label ());

    Gtk::Table* table = Gtk::manage (new Gtk::Table (3, 3));
    table->attach (*R, 0, 1, 0, 1, Gtk::EXPAND, Gtk::SHRINK, 0, 0);
    table->attach (*G, 0, 1, 1, 2, Gtk::EXPAND, Gtk::SHRINK, 0, 0);
    table->attach (*B, 0, 1, 2, 3, Gtk::EXPAND, Gtk::SHRINK, 0, 0);
    table->attach (*H, 1, 2, 0, 1, Gtk::EXPAND, Gtk::SHRINK, 0, 0);
    table->attach (*S, 1, 2, 1, 2, Gtk::EXPAND, Gtk::SHRINK, 0, 0);
    table->attach (*V, 1, 2, 2, 3, Gtk::EXPAND, Gtk::SHRINK, 0, 0);
    table->attach (*LAB_L, 2, 3, 0, 1, Gtk::EXPAND, Gtk::SHRINK, 0, 0);
    table->attach (*LAB_A, 2, 3, 1, 2, Gtk::EXPAND, Gtk::SHRINK, 0, 0);
    table->attach (*LAB_B, 2, 3, 2, 3, Gtk::EXPAND, Gtk::SHRINK, 0, 0);

	mbox->pack_start (*table, Gtk::PACK_SHRINK, 2);
	
	add (*mbox);
	
	setInvalid ();
	show_all ();
}

void Navigator::setInvalid (int fullWidth, int fullHeight) {
    if (fullWidth>0 && fullHeight>0)
        position->set_text (Glib::ustring::compose (M("NAVIGATOR_XY_FULL"),fullWidth,fullHeight));
    else 
        position->set_text (M("NAVIGATOR_XY_NA"));

	R->set_text (M("NAVIGATOR_R_NA"));
	G->set_text (M("NAVIGATOR_G_NA"));
	B->set_text (M("NAVIGATOR_B_NA"));
	H->set_text (M("NAVIGATOR_H_NA"));
	S->set_text (M("NAVIGATOR_S_NA"));
	V->set_text (M("NAVIGATOR_V_NA"));
	LAB_A->set_text (M("NAVIGATOR_LAB_A_NA"));
	LAB_B->set_text (M("NAVIGATOR_LAB_B_NA"));
	LAB_L->set_text (M("NAVIGATOR_LAB_L_NA"));
}

// if !validPos then x/y contain the full image size
void Navigator::pointerMoved (bool validPos, Glib::ustring profile, int x, int y, int r, int g, int b) {

	if (!validPos)
		setInvalid (x,y);
	else {
		position->set_text (Glib::ustring::compose ("x = %1, y = %2", x, y));
		R->set_text (Glib::ustring::compose (M("NAVIGATOR_R_VALUE"), Glib::ustring::format(std::fixed, std::setprecision(1), r*100.f/255.f) + Glib::ustring("%")));
		G->set_text (Glib::ustring::compose (M("NAVIGATOR_G_VALUE"), Glib::ustring::format(std::fixed, std::setprecision(1), g*100.f/255.f) + Glib::ustring("%")));
		B->set_text (Glib::ustring::compose (M("NAVIGATOR_B_VALUE"), Glib::ustring::format(std::fixed, std::setprecision(1), b*100.f/255.f) + Glib::ustring("%")));
		float h, s, v;
		Color::rgb2hsv (r*0xffff/0xff, g*0xffff/0xff, b*0xffff/0xff, h, s, v);
		H->set_text (Glib::ustring::compose (M("NAVIGATOR_H_VALUE"), Glib::ustring::format(std::fixed, std::setprecision(1), h*360.f) + Glib::ustring("\xc2\xb0")));
		S->set_text (Glib::ustring::compose (M("NAVIGATOR_S_VALUE"), Glib::ustring::format(std::fixed, std::setprecision(1), s*100.f) + Glib::ustring("%")));
		V->set_text (Glib::ustring::compose (M("NAVIGATOR_V_VALUE"), Glib::ustring::format(std::fixed, std::setprecision(1), v*100.f) + Glib::ustring("%")));
		int LAB_a, LAB_b, LAB_l;
		//rgb2lab (r, g, b, LAB_l, LAB_a, LAB_b);
		rgb2lab (profile, r, g, b, LAB_l, LAB_a, LAB_b);  // TODO: Really sure this function works?
		
		LAB_A->set_text (Glib::ustring::compose (M("NAVIGATOR_LAB_A_VALUE"), LAB_a));
		LAB_B->set_text (Glib::ustring::compose (M("NAVIGATOR_LAB_B_VALUE"), LAB_b));
		LAB_L->set_text (Glib::ustring::compose (M("NAVIGATOR_LAB_L_VALUE"), LAB_l));
	}
}


void Navigator::rgb2lab (Glib::ustring profile, int r, int g, int b, int &LAB_l, int &LAB_a, int &LAB_b) {
	
	double xyz_rgb[3][3];
	const double ep=216.0/24389.0;
	const double ka=24389.0/27.0;

	double var_R = r / 255.0;
	double var_G = g / 255.0;
	double var_B = b / 255.0;

	if (profile=="sRGB") {//apply sRGB inverse gamma

    // 
// if you want display = working space
// today as the gamma output can not be configured
// it is better that the user has the gamma of the output space
	if ( var_R > 0.04045 ) 
		var_R = pow ( ( ( var_R + 0.055 ) / 1.055 ), rtengine::Color::sRGBGammaCurve);
	else    
		var_R = var_R / 12.92;
	if ( var_G > 0.04045 ) 
		var_G = pow ( ( ( var_G + 0.055 ) / 1.055 ), rtengine::Color::sRGBGammaCurve);
	else                   
		var_G = var_G / 12.92;
	if ( var_B > 0.04045 ) 
		var_B = pow ( ( ( var_B + 0.055 ) / 1.055 ), rtengine::Color::sRGBGammaCurve);
	else    
		var_B = var_B / 12.92;
	} 
// if you want display = output space
	else 
	if (profile=="ProPhoto") {// apply inverse gamma 1.8
		var_R = pow ( var_R, 1.8);
		var_G = pow ( var_G, 1.8);
		var_B = pow ( var_B, 1.8);
	}
	else {// apply inverse gamma 2.2
		var_R = pow ( var_R, 2.2);
		var_G = pow ( var_G, 2.2);
		var_B = pow ( var_B, 2.2);
	}

	/*for (int i=0; i<numprofiles; i++) {
		if (profile==wpnames[i]) {
			for (int m=0; m<3; m++) 
				for (int n=0; n<3; n++) {
					xyz_rgb[m][n] = wprofiles[i][m][n];
			}
			break;
		}
	}*/

    TMatrix wprof = rtengine::ICCStore::getInstance()->workingSpaceMatrix (profile);

	for (int m=0; m<3; m++) 
		for (int n=0; n<3; n++) {
			xyz_rgb[m][n] = wprof[m][n];
		}

	double varxx,varyy,varzz;
	double var_X = ( xyz_rgb[0][0]*var_R + xyz_rgb[0][1]*var_G + xyz_rgb[0][2]*var_B ) / Color::D50x;
	double var_Y = ( xyz_rgb[1][0]*var_R + xyz_rgb[1][1]*var_G + xyz_rgb[1][2]*var_B ) ;
	double var_Z = ( xyz_rgb[2][0]*var_R + xyz_rgb[2][1]*var_G + xyz_rgb[2][2]*var_B ) / Color::D50z;

	varxx = var_X>ep?pow (var_X, 1.0/3.0):( ka * var_X  +  16.0) / 116.0 ;
	varyy = var_Y>ep?pow (var_Y, 1.0/3.0):( ka * var_Y  +  16.0) / 116.0 ;
	varzz = var_Z>ep?pow (var_Z, 1.0/3.0):( ka * var_Z  +  16.0) / 116.0 ;
	LAB_l = ( 116 * varyy ) - 16;
	LAB_a = 500 * ( varxx - varyy );
	LAB_b = 200 * ( varyy - varzz );

}