#include <iostream>
#include <SDL.h>

int main(int args, char* argc[])
{
begin:
	// before SDL init
	const int WinSize{ 3000 };

	// SDL init
	SDL_Init(SDL_INIT_EVERYTHING);

	// main window variables
	SDL_Window* win{ SDL_CreateWindow("Undecided project", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WinSize / 4, WinSize / 4, SDL_WINDOW_SHOWN | SDL_WINDOW_INPUT_FOCUS) };
	SDL_Renderer* ren{ SDL_CreateRenderer(win, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC) };

	// other variables
	SDL_Event e; bool q{ false }, restart{ false };

	SDL_Rect Wall{ 100, 100, 400, 400 };

	// pre loop operations
	SDL_RenderSetLogicalSize(ren, WinSize, WinSize);

	// main loop
	while (!q)
	{
		SDL_SetRenderDrawColor(ren, 0, 0, 0, 255);
		SDL_RenderClear(ren);

		SDL_SetRenderDrawColor(ren, 255, 255, 255, 255);
		SDL_RenderDrawRect(ren, &Wall);
		
		SDL_RenderPresent(ren);
		while (SDL_PollEvent(&e))
		{
			if (e.type == SDL_QUIT) q = true;
			else if (e.type == SDL_KEYDOWN)
			{
				switch (e.key.keysym.sym)
				{
				case SDLK_w: Wall.x -= 1; Wall.y -= 1; Wall.w += 2; Wall.h += 2; break;
				case SDLK_s: Wall.x += 1; Wall.y += 1; Wall.w -= 2; Wall.h -= 2; break;
				case SDLK_p: restart = true; q = true; break;
				case SDLK_ESCAPE: q = true; break;
				default: std::cout << "undefined input!\n"; break;
				}
			}
		}
	}

	// exit code
	SDL_DestroyRenderer(ren);
	SDL_DestroyWindow(win);
	SDL_Quit();
	if (restart) goto begin;
	return 0;
}