/* testImage.c
   This program converts an input image to gray
   scale or sepia depending on the provided
   command line inputs.

  Compile:
  cc testImage.c imageUtils.c -o testImage -std=c99 -lm

  Run:
  ./testImage sugarbear.jpg test.jpg 2
 */
#include <stdlib.h>
#include <stdio.h>

#include "colorUtils.h"
#include "imageUtils.h"

void DumpImage( Pixel **image, int height, int width );


int main(int argc, char **argv) {

  char *inputFile  = NULL;
  char *outputFile = NULL;
  int mode = 1;

  if( argc == 3 || argc == 4 ) {
    inputFile  = argv[1];
    outputFile = argv[2];
    if( argc == 4 ) {
      mode = atoi(argv[3]);
    }
  } else {
    fprintf(stderr, "Usage:" );
    fprintf(stderr, " %s inputFileName outputFileName [mode]\n", argv[0]);
    fprintf(stderr, "  [mode: 1 = Average (default), 2 = Red,\n" );
    fprintf(stderr, "         3 = Luminosity,        4 = Sepia]\n" );
    exit(1);
  }

  int h, w;
  Pixel **image = LoadImage(inputFile, &h, &w);

  if( mode == 1 ) {
    ImageToGrayScale( image, h, w, AVERAGE );
  } else if( mode == 2 ) { 
    ExtractRGB( image, h, w, RED );

    /* other options */

  } else {
    fprintf(stderr, "Invalid mode\n");
  }

    // show numerical values
  DumpImage( image, h, w );
  
  SaveImage(outputFile, image, h, w);

  return 0;
}


/* should probably be in imageUtils.c  */

void DumpImage( Pixel **image, int height, int width )
{
   printf( "%d %d\n", height, width );
   
   for(int i = 0; i<height; i++) {
    for(int j = 0; j<width; j++) {
      printf( "%d ", image[i][j].red );
      //printf( "%d", image[i][j].green;
      //printf( "%d", image[i][j].blue;
    }
    printf( "\n" );
  }
}