/*
Takes a .gim graphics file;
prints a simple ascii representation of the colors.
Optimized for light-text-on-dark-background terminals
(inverts the colors), and subsamples the height by .5
to better maintain aspect ratio of square files.

 -- John Hewitt, CIS 341 2017sp
*/

int program (int argc, string[] argv) {
  var s = argv[1];
  var width = get_width(s);
  var height = get_height(s);
  var bytes = load_image(s);
  print_string(string_of_int(width));
  print_string("x");
  print_string(string_of_int(height));
  print_string("\n");
  var rowlen = 0;
  var row = new int[width];
  var off = 1;
  for (var i=0; i < width*height; i=i+1;) {
    /*print_string(string_of_int(i));
    print_string("x");
    print_string(string_of_int(rowlen));
    print_string("x");
    print_string(string_of_int(width));
    print_string("x");
    print_string(string_of_int(bytes[i]));
    print_string("\n");*/
    if (bytes[i] > 230) {
      row[rowlen] = 64; /* @ */
    } else if (bytes[i] > 204) {
      row[rowlen] = 37; /* % */
    } else if (bytes[i] > 179) {
      row[rowlen] = 35; /* # */
    } else if (bytes[i] > 153) {
      row[rowlen] = 42; /* * */
    } else if (bytes[i] > 128) {
      row[rowlen] = 43; /* + */
    } else if (bytes[i] > 102) {
      row[rowlen] = 61; /* = */
    } else if (bytes[i] > 77) {
      row[rowlen] = 58; /* : */
    } else if (bytes[i] > 51) {
      row[rowlen] = 45; /* - */
    } else if (bytes[i] > 26) {
      row[rowlen] = 46; /* . */
    } else {
      row[rowlen] = 32; /*   */
    }
    if (rowlen == width-1) {
      var test = off [&] 1;
      if (test == 1) {
        print_string(string_of_array(row));
        print_string("\n");
        off = 0;

      } else {
        off = 1;
      }
      rowlen = 0;
    } else {
      rowlen = rowlen + 1;
    }
  }
  return 0;
}