#include <stdio.h>
#include <stdlib.h>
#include "descartes.h"

int IsRectangleOK(point_t q, point_t r) {
  if ((XCoord(q) <= XCoord(r)) && (YCoord(q) <= YCoord(r))) {
    return 1;
  }
  else {
    return 0;
  }
}

rectangle_t Rectangle2(point_t p, point_t q) {
  point_t bl, tr;
  int x1 = XCoord(p);
  int x2 = XCoord(q);
  int y1 = YCoord(p);
  int y2 = YCoord(q);
  int minx, maxx, miny, maxy;
  if (x1 <= x2) {
    minx = x1;
    maxx = x2;
  } 
  else {
    minx = x2;
    maxx = x1;
  }
  if (y1 <= y2) {
    miny = y1;
    maxy = y2;
  }
  else {
    miny = y2;
    maxy = y1;
  }
  bl = Point(minx, miny);
  tr = Point(maxx, maxy);
  return Rectangle(bl, tr);
}

int main (void) {
  point_t p = Point(40, 300);
  point_t q = Point(400, 100);
  point_t r = Point(50, 50);
  rectangle_t rect1, rect2, rect3;
  OpenGraphics();
  printf("First example.\n");
  printf("Corners of rect1 are initially (%d, %d) ", XCoord(p), YCoord(p));
  printf("and (%d, %d).\n", XCoord(q), YCoord(q)); 
  printf("The answer of IsRectangleOK for rect1 is %d.\n", IsRectangleOK(p,q));
  printf("and the resulting Rectangle is\n");
  FillRectangle(Rectangle(p,q));
  printf("Click anywhere in the window to continue...\n");
  GetPoint();
  Clear();
  rect1 = Rectangle2(p,q);
  FillRectangle(rect1);
  p = BottomLeft(rect1);
  q = TopRight(rect1);
  printf("After calling Rectangle2, and extracting corners ...\n");
  printf("Corners of rect1 are now (%d, %d) ", XCoord(p), YCoord(p));
  printf("and (%d, %d).\n", XCoord(q), YCoord(q)); 
  printf("Now answer of IsRectangleOK for rect2 is %d.\n", IsRectangleOK(p,q));
  FillRectangle(rect1);
  printf("Click anywhere in the window to continue...\n");
  GetPoint();
  Clear();
  printf("\nSecond example.\n");
  printf("Corners of rect2 are initially (%d, %d) ", XCoord(q), YCoord(q));
  printf("and (%d, %d).\n", XCoord(r), YCoord(r)); 
  printf("The answer of IsRectangleOK for rect2 is %d.\n", IsRectangleOK(q,r));
  printf("and the resulting Rectangle is\n");
  FillRectangle(Rectangle(q,r));
  printf("Click anywhere in the window to continue...\n");
  GetPoint();
  Clear();
  rect2 = Rectangle2(q,r);
  q = BottomLeft(rect2);
  r = TopRight(rect2);
  printf("After calling Rectangle2, and extracting corners ...\n");
  printf("Corners of rect2 are now (%d, %d) ", XCoord(q), YCoord(q));
  printf("and (%d, %d).\n", XCoord(r), YCoord(r)); 
  printf("Now answer of IsRectangleOK for rect2 is %d.\n", IsRectangleOK(q,r));
  FillRectangle(rect2);
  printf("Click anywhere in the window to continue...\n");
  GetPoint();
  Clear();
  printf("\nThird example.\n");
  printf("Corners of rect3 are initially (%d, %d) ", XCoord(q), YCoord(q));
  printf("and (%d, %d).\n", XCoord(p), YCoord(p)); 
  printf("The answer of IsRectangleOK for rect3 is %d.\n", IsRectangleOK(q,p));
  printf("and the resulting Rectangle is\n");
  FillRectangle(Rectangle(q,p));
  printf("Click anywhere in the window to continue...\n");
  GetPoint();
  Clear();
  rect3 = Rectangle2(q,p);
  q = BottomLeft(rect3);
  p = TopRight(rect3);
  printf("After calling Rectangle2, and extracting corners ...\n");
  printf("Corners of rect3 are now (%d, %d) ", XCoord(q), YCoord(q));
  printf("and (%d, %d).\n", XCoord(p), YCoord(p)); 
  printf("Now answer of IsRectangleOK for rect3 is %d.\n", IsRectangleOK(q,p));
  FillRectangle(rect3);
  CloseGraphics();
  return EXIT_SUCCESS;
}