#ifndef _MYSTNB_ENGINE_H
#define _MYSTNB_ENGINE_H

#include <stdint.h>

#define PLAYER_COUNT 1

/* Directions */
#define DIR_DOWN   0
#define DIR_RIGHT  1
#define DIR_UP     2
#define DIR_LEFT   3

/* struct player: A player on the map, triggering actions as they move */
struct player
{
	/* Position in map */
	int x, y;
	/* Direction currently facing */
	int dir;
	/* Animation and frame */
	struct animation const *anim;
	int frame;
};

/* struct map: A map with moving doors, collectibles, and fog */
struct map
{
	/* Width and height */
	int w, h;
	/* Whether fog is enabled */
	int fog;
	/* Raw data */
	uint8_t *data;
};

/* struct game: A running game with a map and some players */
struct game
{
	/* Current map */
	struct map *map;
	/* Players */
	struct player *players[PLAYER_COUNT + 1];
	/* Current game time (ms) */
	int time;
};

/* Draw the current game frame from scratch; does not dupdate() */
void engine_draw(struct game const *game);

/* Try to move a player along a direction. Returns 1 if the move is successful,
   0 otherwise (collisions or out-of-bounds moves) */
int engine_move(struct game *game, struct player *player, int direction);

#endif /* _MYSTNB_ENGINE_H */