// SDL2 Hello, World!
// This should display a white screen for 2 seconds
// compile with: clang++ main.cpp -o hello_sdl2 -lSDL2
// run with: ./hello_sdl2
#include <SDL2/SDL.h>
#include <stdio.h>
#include <stdbool.h>

#define SCREEN_WIDTH 1600
#define SCREEN_HEIGHT 800

int x[16*8];
int y[16*8];
int i=0;

int length=1;
int delta_x = 1;
int delta_y = 0;

quit =false;

Uint32 updateSnake(Uint32 interval, void* param){
	printf("hello\n");
	return 0;
//'	int current_x = x[i];
//'	int current_y = y[i];
//'
//'	
}

SDL_Window* initSDL(){
  SDL_Window* window = NULL;
  SDL_Surface* screenSurface = NULL;
  if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) < 0) {
    fprintf(stderr, "could not initialize sdl2: %s\n", SDL_GetError());
    exit(1);
  }
  window = SDL_CreateWindow(
			    "hello_sdl2",
			    SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
			    SCREEN_WIDTH, SCREEN_HEIGHT,
			    SDL_WINDOW_SHOWN
			    );
  if (window == NULL) {
    fprintf(stderr, "could not create window: %s\n", SDL_GetError());
    exit(1);
  }
  screenSurface = SDL_GetWindowSurface(window);
  SDL_FillRect(screenSurface, NULL, SDL_MapRGB(screenSurface->format, 0x40, 0x40, 0x40));
  SDL_UpdateWindowSurface(window);
  return window;
}

void killSDL(SDL_Window* window){
  SDL_DestroyWindow(window);
  SDL_Quit();
}

int main(int argc, char* args[]) {
	SDL_Window* win = initSDL();

	//set x and y list to zero
	memset(x,0,sizeof(int)*16*8);
	memset(y,0,sizeof(int)*16*8);

	SDL_TimerID timerId = SDL_AddTimer(500, updateSnake, "");

	while(!quit){
		SDL_Event event;
		while(SDL_PollEvent(&event)){
			switch(event.type){
				case(SDL_QUIT):
					quit = true;
					break;
			}
		}
	}
	
	killSDL(win);
}