#include "renderer.h"

#include <assert.h>
#include <fcntl.h>
#include <linux/input.h>
#include <sys/select.h>
#include <unistd.h>

#define MAX(a, b) ((a) < (b) ? (b) : (a))

int main()
{
	int err;

	const int input_fd = open("/dev/input/event0", O_RDONLY);
	assert(input_fd != -1);

	const renderer_params_t renderer_params = renderer_init();
	const int drm_fd = renderer_params.drm_fd;

	renderer_clear();
	renderer_swap();

	const int max_fd = MAX(input_fd, drm_fd);
	fd_set set;
	bool running = true;
	while (running) {
		FD_ZERO(&set);
		FD_SET(input_fd, &set);
		FD_SET(drm_fd, &set);

		select(max_fd + 1, &set, nullptr, nullptr, nullptr);

		if (FD_ISSET(input_fd, &set)) {
			struct input_event ev;
			const int len = read(input_fd, &ev, sizeof(ev));
			assert(len == sizeof(ev));

			if (ev.type == EV_KEY && ev.value >= 0 && ev.value <= 2) {
				if (ev.code == KEY_Q && ev.value == 1)
					running = false;
			}
		}

		if (FD_ISSET(drm_fd, &set)) {
			renderer_handle();
			renderer_draw();
			renderer_swap();
		}
	}

	renderer_cleanup();
	close(input_fd);

	return 0;
}