#include <gint/display.h>
#include <gint/keyboard.h>
#include <gint/timer.h>
#include <gint/clock.h>
#include <gint/std/string.h>
#include <stdbool.h>

#include "conf.h"
#include "main.h"
#include "debug.h"
#include "init.h"
#include "vec.h"
#include "player.h"
#include "level.h"
#include "camera.h"
#include "input.h"
#include "gen_levels.h"

int main(void) {
	init(); /* initialize gint */

	/* main game loop */
	while (play_level(1)) {};

	/* return to menu */
	return 1;
}

int play_level(uint level_id) {
	/* set level */
	const Level *level;
	level_set(&level, level_id);

	/* create player */
	Player player;
	player_init(&player, level);

	/* create camera */
	Camera camera;
	camera_init(&camera, &player, level);

	/* create input manager */
	Input input;
	input_init(&input);

	/* UPS control */
	volatile int has_ticked = 1;
	int timer = timer_setup(TIMER_ANY, 1000000/UPS, callback, &has_ticked);
	timer_start(timer);

	uint step = 0;

	while (!input_is_down(&input, K_EXIT)) {
		/* repeat step event so the UPS is constant regardless of FPS */
		for (int i = 0; i < UPS / FPS; ++i) {
			/* UPS control */
			while(!has_ticked) sleep();
			has_ticked = 0;
			/* step event is where all the logic happens */
			step += 1;
			step_event(&player, level, &camera, &input, step);
			/* player death check */
			if(player.dead) {
				timer_stop(timer);
				return 1;
			}
		}
		/* draw event just draws stuff */
		draw_event(&player, level, &camera, &input, step);
	}
	timer_stop(timer);
	return 0;
}

int callback(volatile void *arg) {
	volatile int *has_ticked = arg;
	*has_ticked = 1;
	return 0;
}

void step_event(Player *player, const Level *level, Camera *camera, Input *input, uint step) {
	input_step(input, step);
	player_step(player, input, level, step);
	level_step(level);
	camera_step(camera);
}

void draw_event(Player *player, const Level *level, Camera *camera, Input *input, uint step) {
	dclear(level->bg_color);
	level_draw(level, camera);
	player_draw(player, camera);
	#ifdef DEBUG
	/* put your debug code here */
	#endif
	dupdate();
}