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/**
 * @file fenster.c
 *
 * @author Laura Vettin <laura.vettin@ivei.uni-stuttgart.de>
 * @date 06.11.2017
 * @brief Draws a rectangle and many circles
 * TODO: color depending on position
 */

#include <gdpc.h>
#include <gdptools.h>
#include <stdlib.h>

_Bool touching(int x, int y, int r, int x_r, int y_r, int w_r, int h_r, int mode);

int main(void) {

  srand(time(0));
  const int w = 500, h = 500;
  // create the window
  GDPC* c=GDPC_create(w, h);
  // draw an rectangle
  const int x_r = w/2;
  const int y_r = h/2;
  const int w_r = 100;
  const int h_r = 50;
  GDPC_rectangle(c, x_r, y_r, w_r, h_r, 1);


  // draw many blue circles
  int x = 0, y = 0;
  int radius = 10;
  for(int i = 0; i < 200; i++){
    //x, y central values
     x = radius+rand()%(w-2*radius);
     y = radius+rand()%(h-2*radius);
     // TODO: blue only outside rect, green inside rect
     //if(((x >= x_r) && (y >= y_r)) && ((x <= x_r+w_r) && (y <= y_r+h_r)))
     if (touching(x, y, radius, x_r, y_r, w_r, h_r, 1))
       GDPC_color(c, 0, 255, 0); // BLUE

     else
       GDPC_color(c, 0, 0, 255); // BLUE



     GDPC_circle(c, x, y, radius, 1);
  }


if(GDPC_destroy(c))  exit(1);
    return 0;
}

_Bool touching(int x, int y, int r, int x_r, int y_r, int w_r, int h_r, int mode)
{
  switch(mode)
  {
  case 0:
    if(((x >= x_r) && (y >= y_r)) && ((x <= x_r+w_r) && (y <= y_r+h_r)))
      return 1;
    else
      return 0;
    break;
  case 1:
    if((((x + r >= x_r) && (y + r >= y_r)) || ((x - r >= x_r) && (y - r >= y_r)))
        && (((x + r <= x_r+w_r) && (y + r <= y_r+h_r)) || ((x - r <= x_r+w_r) && (y - r <= y_r+h_r))))
       return 1;
    else
      return 0;
    break;
  default: //do nothing
    break;
  }
}