#ifndef TILE_H
#define TILE_H
#define TILE_NULL 0
#define PASS 0
#define NO_PASS 1
#define NULL_CHAR '\0'

#define PLAYER 1
#define FLOOR 2
#define WALL 3
#define DOOR 4
#define ITEM 5
#define NPC 6

#define STATE_CLOSED 0
#define STATE_OPEN 1
#define STATE_BROKEN 2
#define STATE_MISSING 3

/*** Tile
struct Tile is the overarching struct for all objects on the map, be they walls, items, monsters, or even the players.
***/
struct Tile {
  unsigned int tid;
  short id; // the tile's id, 0-9,999=walls;10,000-19,999=ground;20,000-29,999=items;30,000-39,999=monsters
  short x; // x coords on the map
  short y; // y coords on the map
  struct Tile *next; // pointer to next Tile in the chain
  struct Tile *prev; // pointer to previous Tile in the chain
  void *data; // pointer to the Tile's actual data, preferably a struct
};

struct Tile null_tile; // FIXME: temporary solution to next and prev pointers

struct BasicTile {
  int collision;
  char name[16];
};

struct DoorTile {
  int collision;
  char name[16];
  int state;
};
extern struct DoorTile doors[];

struct PlayerTile {
  int collision;
  char name[16];
  int vision;
  struct Controller *controller;
};
extern struct PlayerTile players[];

struct NpcTile {
  int collision;
  char name[16];
  struct Tile *target;
  int behavior; // for BEHAVE_AGGRESSIVE, etc.
  int vision;
};
extern struct NpcTile npcs[];
/*
interface used for creating new Tile
*/
struct Tile *newTile(unsigned int tid, short id, short x, short y);
void freeTile(struct Tile* tile);
/*

*/
/*** activateTile (target_tile, activator_tile)
This function, when called on a TRIGGER tile, attempts to do various operations on the target_tile depending on the TriggerTile's type among other conditions. A basic example is the DOOR subtype, which simple toggles from STATE_OPEN to STATE_CLOSED and vice versa when activated.
***/
int activateTile(struct Tile *target_tile, struct Tile *activator_tile);
#endif