/*Function-lab2uint8 
Author  :Tess Zacharias                                              */
#include <numeric>
#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/opencv.hpp"
#include <iostream>
#include<stdio.h>
#include <sciprint.h>
#include<string.h>
using namespace cv;
using namespace std;
  extern "C"
  {
  #include "api_scilab.h"
  #include "Scierror.h"
  #include "BOOL.h"
  #include <localization.h>

struct Color
{
    float R,G,B,X,Y,Z,L,a,b;
};


Color lab2uint8(float L, float a, float b)
{
  float R1=round(((255*L)/100));
  float G1=round(a+128);
  float B1=round(b+128);
  Color rgb;
  rgb.R= R1;
  rgb.G = G1;
  rgb.B = B1;
  return rgb;

} 

 int opencv_lab2uint8(char *fname, unsigned long fname_len)
    {
    // Error management variable
        SciErr sciErr;
    //variable info
	int iRows		= 0;
	int iCols		= 0;
        int piRows		= 0;
	int piCols		= 0;
        int* piAddr=NULL;
        int* piAddr1=NULL;
        int* piAddr3=NULL;
        double *value=NULL;
        int* piLen		= NULL;
        char **val;
        int i,j;
        int error;
        Color out;
        double check;
        Mat img,dst;
        float L,a,b;
        int *piAddrNew = NULL;                      
         //checking output argument
          CheckOutputArgument(pvApiCtx,1,1);
         //checking if number of input arguments are 3
        
         int k=0;
        // SciErr getMatrixOfDoubleInList(void* _pvCtx, int* _piParent, int _iItemPos, int* _piRows, int* _piCols, double** _pdblReal)
                    double *pstDataR = NULL;
                    double *pstDataG = NULL;
                    double *pstDataB = NULL; 
                    sciErr = getVarAddressFromPosition(pvApiCtx,1,&piAddr);
                    if(sciErr.iErr)   
                    {
                        printError(&sciErr, 0);
                        return 0;
                    }
                    //retrive the matrix of the R values   
                    sciErr =  getMatrixOfDoubleInList(pvApiCtx, piAddr, 1, &iRows, &iCols, &pstDataR);
                    if(sciErr.iErr)
                    {
                        printError(&sciErr, 0);
                        return 0;
                    }
                    //retrive address of the list
                    sciErr = getVarAddressFromPosition(pvApiCtx,1,&piAddr);
                    if(sciErr.iErr)   
                    {
                        printError(&sciErr, 0);
                        return 0;
                    }   
                    //retrive the matrix of the G values 
                    sciErr = getMatrixOfDoubleInList(pvApiCtx, piAddr, 2, &iRows, &iCols, &pstDataG);
                    if(sciErr.iErr)
                    {
                        printError(&sciErr, 0);
                        return 0;
                    }
                    //retrive address of the list
                    sciErr = getVarAddressFromPosition(pvApiCtx,1,&piAddr);
                    if(sciErr.iErr)   
                    {
                        printError(&sciErr, 0);
                        return 0;
                    }   
                    //retrive the matrix of the B values 
                    sciErr = getMatrixOfDoubleInList(pvApiCtx, piAddr, 3, &iRows, &iCols, &pstDataB);
                    if(sciErr.iErr)
                    {
                        printError(&sciErr, 0);
                        return 0;
                    }
         int m=0;
         double *r1,*g1,*b1;
         r1=(double *)malloc(sizeof(double)*iRows*iCols);
         g1=(double *)malloc(sizeof(double)*iRows*iCols);
         b1=(double *)malloc(sizeof(double)*iRows*iCols);
                               for(int i=0;i<iRows;i++)
                               {
                                  for(int j=0;j<iCols;j++)
                                   {
                                         // Vec3d intensity = img.at<Vec3d>(i,j);
                                          L= (pstDataR[k]);
                                          a= (pstDataG[k]);
                                          b= (pstDataB[k++]);
                                          out=lab2uint8(L,a,b);
                                            r1[m]=(out.R);
                                            g1[m]=(out.G);
                                            b1[m++]=(out.B);  
                                   }
                               }
                     
    sciErr = createList(pvApiCtx, nbInputArgument(pvApiCtx) + 1, 3, &piAddrNew);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }


    //Adding the R value matrix to the list
    //Syntax : createMatrixOfInteger32InList(void* _pvCtx, int _iVar, int* _piParent, int _iItemPos, int _iRows, int _iCols, const int* _piData)
    sciErr = createMatrixOfDoubleInList(pvApiCtx, nbInputArgument(pvApiCtx)+1 , piAddrNew, 1, iRows,iCols, r1);
    free(r1);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //Adding the G value matrix to the list
    sciErr = createMatrixOfDoubleInList(pvApiCtx, nbInputArgument(pvApiCtx)+1 , piAddrNew, 2, iRows, iCols, g1);
    free(g1);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    //Adding the B value matrix to the list
    sciErr = createMatrixOfDoubleInList(pvApiCtx, nbInputArgument(pvApiCtx)+1 , piAddrNew, 3, iRows, iCols, b1);
    free(b1);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

              
             AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
            ReturnArguments(pvApiCtx);            
            return 0;                
}
}