/********************************************************
Author: Shubheksha Jalan 
********************************************************/

#include <numeric>
#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/opencv.hpp"
#include <iostream>
using namespace cv;
using namespace std;
extern "C"
{
  #include "api_scilab.h"
  #include "Scierror.h"
  #include "BOOL.h"
  #include <localization.h>
  #include "../common.h"
  
  
  int opencv_cornerMinEigenVal(char *fname, unsigned long fname_len)
  {
    SciErr sciErr;
    int intErr = 0;
    int iRows=0,iCols=0;
    int *piLen = NULL;
    int *piAddr = NULL;
    int *piAddrNew = NULL;
    int *piAddr2  = NULL;
    int *piAddr3  = NULL;
    int *piAddr4 = NULL;
    int i,j,k;
    double blockSize, ksize;
    char **borderType;
    CheckInputArgument(pvApiCtx, 4, 4);
    CheckOutputArgument(pvApiCtx, 1, 1) ;

    Mat image;
    retrieveImage(image, 1); 
    cvtColor(image,image,CV_BGR2GRAY);
    sciErr = getVarAddressFromPosition(pvApiCtx,2,&piAddr2);
    if (sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }
     intErr = getScalarDouble(pvApiCtx, piAddr2, &blockSize);
     if(intErr)
    {
        return intErr;
    }   

    //for ksize
    sciErr = getVarAddressFromPosition(pvApiCtx,3,&piAddr3);
    if (sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }
     intErr = getScalarDouble(pvApiCtx, piAddr3, &ksize);
    if(intErr)
    {
        return intErr;
    }   

    //for border type
    sciErr = getVarAddressFromPosition(pvApiCtx, 4, &piAddr4);
    if (sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }
    //Now, we will retrieve the string from the input parameter. For this, we will require 3 calls
    //first call to retrieve dimensions
    sciErr = getMatrixOfString(pvApiCtx, piAddr4, &iRows, &iCols, NULL, NULL);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }
    piLen = (int*)malloc(sizeof(int) * iRows * iCols);
    //second call to retrieve length of each string
    sciErr = getMatrixOfString(pvApiCtx, piAddr4, &iRows, &iCols, piLen, NULL);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }

    borderType = (char**)malloc(sizeof(char*) * iRows * iCols);
    for(i = 0 ; i < iRows * iCols ; i++)
        borderType[i] = (char*)malloc(sizeof(char) * (piLen[i] + 1));//+ 1 for null termination

    //third call to retrieve data
    sciErr = getMatrixOfString(pvApiCtx, piAddr4, &iRows, &iCols, piLen, borderType);
    if(sciErr.iErr)
    {
        printError(&sciErr, 0);
        return 0;
    }
   cout<<"String\n";

    Mat new_image;
    if(strcmp(borderType[0], "BORDER_CONSTANT") == 0){
           cornerMinEigenVal(image, new_image, blockSize, ksize, BORDER_CONSTANT);
       }
    else if(strcmp(borderType[0], "BORDER_DEFAULT") == 0)
    	cornerMinEigenVal(image, new_image, blockSize, ksize, BORDER_DEFAULT);

    string tempstring = type2str(new_image.type());
    char *checker;
    checker = (char *)malloc(tempstring.size() + 1);
    memcpy(checker, tempstring.c_str(), tempstring.size() + 1);
    returnImage(checker,new_image,1);
    free(checker); 
    
    //Assigning the list as the Output Variable
    AssignOutputVariable(pvApiCtx, 1) = nbInputArgument(pvApiCtx) + 1;
    //Returning the Output Variables as arguments to the Scilab environment
    ReturnArguments(pvApiCtx);
    return 0;

  }
/* ==================================================================== */
}