#include <GL/glut.h>
#include <stdio.h> 
#include <stdlib.h>

#define NUMSQUARES 64
#define WIDTH 1 
#define HEIGHT 1 


//Strcut square and board represent the minesweeper field 
struct square 
{
	int x;
	int y; 	     // X and Y position of square		
	char letter; //Letter on the square
}; 

struct board
{
	int width; //width of squares
	int height; //height of squares 
	struct square grid[NUMSQUARES]; //amount of squares
};
int R=100,G=100,B=100,elapsedTime=0; //RGB and timer values
int windowH=480,windowW=640; 
struct board gameGrid; 


//function to fill the Board struct with proper coordinates
void createGrid(struct board* inGrid) 
{
	
	int i=0,tempx=0,tempy=0;
	 inGrid->grid[0].y=0;
	inGrid->grid[0].x=0; 
	inGrid->grid[0].letter='a'; 
	printf("grid 0 x=%d y=%d letter=%c \n",inGrid->grid[0].x,inGrid->grid[0].y);
	for(i=1;i<64;i++)
	{
		if(i%8==0) 
		{
			tempy+=inGrid->height+1;
			tempx=0-inGrid->width-1;
		}
		tempx+=inGrid->width+1; 
		inGrid->grid.x=tempx; 
		inGrid->grid.y=tempy; 
		inGrid->grid.letter='a';
		printf("grid %d x=%d y=%d letter=%c \n",i,inGrid->grid.x,inGrid->grid.y);
	}
}

//Keyboard input function

void keyboard(unsigned char key, int x, int y)
{
	
	//if r is pressed get a random number for each color variable	
	if (key==112)
	{
		printf("P pressed \n"); 
	}
	else if(key==113)  //if q is pressed exit program!
	{
		exit(0);
	}
}
//game is the timer function. 
void game(int value)
{

elapsedTime++; //add to elapsed time
glutTimerFunc(1000,game,0); //create another timerfunc so we have concurency

}

void mydisplay(){

int i;
glClear(GL_COLOR_BUFFER_BIT); 

for(i=0;i<64;i++)
{


R=(int)(rand() / (((double)RAND_MAX + 1)/ 255));
G=(int)(rand() / (((double)RAND_MAX + 1)/ 255));
B=(int)(rand() / (((double)RAND_MAX + 1)/ 255));

glLoadIdentity();
glScalef(0.1,0.1,0.1);	
glTranslated(gameGrid.grid.x,gameGrid.grid.y,10);	

glColor3ub(R,G,B); //use the timer random colors
int Xmodifier=(gameGrid.grid.x+((gameGrid.grid.x+gameGrid.width)/2));
int Ymodifier=(gameGrid.grid.y+((gameGrid.grid.y+gameGrid.height)/2));

//use grid square moved to be around the origin 
glBegin(GL_POLYGON);        
		glVertex2d(gameGrid.grid.x-Xmodifier, gameGrid.grid.y-Ymodifier);        
		glVertex2d(gameGrid.grid.x-Xmodifier, gameGrid.grid.y+gameGrid.height-Ymodifier);        
		glVertex2d(gameGrid.grid.x+gameGrid.width-Xmodifier, gameGrid.grid.y+gameGrid.height-Ymodifier);        
		glVertex2d(gameGrid.grid.x+gameGrid.width-Xmodifier, gameGrid.grid.y-Ymodifier);        
glEnd();


}
	glFlush(); 
}

void myReshape(int w, int h)
{
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION); /* switch matrix mode */
    glLoadIdentity();
    glOrtho(0,w,0,h,-1,1);
    glMatrixMode(GL_MODELVIEW); /* return to modelview mode */
}


int main(int argc, char** argv){
glutInit(&argc, argv);
	gameGrid.width=WIDTH; 
	gameGrid.height=HEIGHT; 
	createGrid(&gameGrid); 

	void(*foo)(int value);

	
	glutReshapeFunc(myReshape);	
	glutInitWindowSize (400, 300);
	glutTimerFunc(1000,game,0);
	glutCreateWindow("simple");     
	glutKeyboardFunc (keyboard);	
	glutDisplayFunc(mydisplay);    
	

	glutMainLoop();
	
}