#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"

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

	/* main game loop */
	play_level(0);

	/* return to menu */
	return 1;
}

int play_level(int level_id)
{
	/* create player */
	Player player = {
		.pos = {16 * VEC_PRECISION, 16 * VEC_PRECISION},
		.hbox = {7 * VEC_PRECISION, 7 * VEC_PRECISION},
		.origin = {4 * VEC_PRECISION, 4 * VEC_PRECISION}
	};

	/* create level */
	Level level = {
		.width = 0,
		.height = 0
	};

	/* create camera */
	Camera camera = {
		.pos = {DWIDTH * VEC_PRECISION, DHEIGHT * VEC_PRECISION},
		.target = &player.pos,
		.speed = 0.01
	};

	/* create input manager */
	Input input;
	input.keys[K_LEFT] = KEY_LEFT;
	input.keys[K_RIGHT] = KEY_RIGHT;
	input.keys[K_UP] = KEY_UP;
	input.keys[K_DOWN] = KEY_DOWN;
	input.keys[K_EXIT] = KEY_EXIT;

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

	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);
		}
		/* draw event just draws stuff */
		draw_event(&player, &level, &camera, &input, step);
	}
	return 1;
}

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

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

void draw_event(Player *player, Level *level, Camera *camera, Input *input, uint step)
{
	dclear(C_WHITE);
	level_draw(level, camera);
	player_draw(player, camera);
	#ifdef DEBUG
	camera_draw_debug(camera);
	//input_draw_debug(input);
	player_draw_debug(player, step);
	#endif
	dupdate();
}