#include "captcha.h"

int captcha_print(char* text)
{
  File* file = file_open("code.png");

  gdImagePtr im = gdImageCreateFromPngPtr(file->size, file->data);
  gdImageColorTransparent(im, gdImageColorAllocate(im, 255, 255, 255));
  
  char  text_width = strlen(text);
  float letter_width = ((float) gdImageSX(im) / 26.00);

  int image_width = letter_width * text_width;
  int image_height = gdImageSY(im);

  gdImagePtr image = gdImageCreateTrueColor(image_width, image_height);
  gdImageColorTransparent(image, gdImageColorAllocate(image, 0, 0, 0));

  srand(time(NULL) * (*text));
  int i;
  for(i=0; i<=10; i++)
  {
    int x1 = ((double) rand() / RAND_MAX) * image_width;
    int y1 = ((double) rand() / RAND_MAX) * image_height;
    gdImageFilledArc(image, x1, y1, x1 + 10, y1 + 10, ((double) rand() / RAND_MAX) * 360, ((double) rand() / RAND_MAX) * 360, gdImageColorAllocate(image, 100 + (rand() * 155), 150 + (rand() * 105), 150 + (rand() * 105)), gdEdged);
  }

  int pos;
  for(pos=0; text[pos]!='\0'; pos++)
  {
    //printf("[pos:%d] %d\n", pos, (text[pos] - 65) );
    gdImageCopyMerge(image, im, 
        letter_width * pos, 0, 
        ((text[pos] - 65) * letter_width), 0, 
        letter_width, gdImageSY(image), 50);
  }

  puts("content-type: image/jpeg\n");
  gdImageJpeg(image, stdout, 80);

  gdImageDestroy(image);
  gdImageDestroy(im);

  file_close(file);
  return EXIT_SUCCESS;
}

int main()
{
  return captcha_print("HALLELUJA");
}