/*
 * Copyright (c) Camden Dixie O'Brien
 * SPDX-License-Identifier: AGPL-3.0-only
 */

#include "engine_hooks.h"

#include <assert.h>
#include <stdatomic.h>
#include <stdbool.h>
#include <stdlib.h>

#define FRAMERATE 60
#define INTERVAL (1000 / FRAMERATE)

int main(int argc, char *argv[])
{
	int err = SDL_Init(SDL_INIT_VIDEO);
	assert(0 == err);

	SDL_Window *window = SDL_CreateWindow(
	    game_conf.win.title, SDL_WINDOWPOS_UNDEFINED,
	    SDL_WINDOWPOS_UNDEFINED, game_conf.win.w, game_conf.win.h, 0);
	assert(NULL != window);

	SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, 0);
	assert(NULL != renderer);

	void *gamemem = calloc(1, game_conf.memsize);
	game_init(argc, argv, gamemem, renderer);

	uint64_t prevt = SDL_GetTicks64();
	while (1) {
		uint64_t t = SDL_GetTicks64();
		uint64_t dt = t - prevt;

		if (dt >= INTERVAL) {
			// Handle all events currently in queue
			SDL_Event evt;
			while (SDL_PollEvent(&evt)) {
				if (game_evthandle(gamemem, &evt) != GAMESTATUS_OK)
					goto quit;
			}

			// Update game state
			if (game_update(gamemem, dt) != GAMESTATUS_OK)
				goto quit;

			// Render frame
			SDL_RenderClear(renderer);
			game_render(gamemem, renderer, t);
			SDL_RenderPresent(renderer);

			// Set previous frame draw time
			prevt = t;
		}

		SDL_Delay(2);
	}

quit:
	game_teardown(gamemem);
	SDL_DestroyRenderer(renderer);
	SDL_DestroyWindow(window);
	SDL_Quit();
}