/*	SCCS Id: @(#)monst.h	3.5	2006/09/06	*/
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* NetHack may be freely redistributed.  See license for details. */

#ifndef MONST_H
#define MONST_H

/* The weapon_check flag is used two ways:
 * 1) When calling mon_wield_item, is 2-6 depending on what is desired.
 * 2) Between calls to mon_wield_item, is 0 or 1 depending on whether or not
 *    the weapon is known by the monster to be cursed (so it shouldn't bother
 *    trying for another weapon).
 * I originally planned to also use 0 if the monster already had its best
 * weapon, to avoid the overhead of a call to mon_wield_item, but it turns out
 * that there are enough situations which might make a monster change its
 * weapon that this is impractical.  --KAA
 */
# define NO_WEAPON_WANTED 0
# define NEED_WEAPON 1
# define NEED_RANGED_WEAPON 2
# define NEED_HTH_WEAPON 3
# define NEED_PICK_AXE 4
# define NEED_AXE 5
# define NEED_PICK_OR_AXE 6

/* The following flags are used for the second argument to display_minventory
 * in invent.c:
 *
 * MINV_NOLET  If set, don't display inventory letters on monster's inventory.
 * MINV_ALL    If set, display all items in monster's inventory, otherwise
 *	       just display wielded weapons and worn items.
 */
#define MINV_NOLET 0x01
#define MINV_ALL   0x02

#ifndef MEXTRA_H
#include "mextra.h"
#endif

struct monst {
	struct monst *nmon;
	struct permonst *data;
	unsigned m_id;
	short mnum;		/* permanent monster index number */
	short cham;		/* if shapeshifter, orig mons[] idx goes here */
	short movement;		/* movement points (derived from permonst definition and added effects */
	uchar m_lev;		/* adjusted difficulty level of monster */
	aligntyp malign;	/* alignment of this monster, relative to the
				   player (positive = good to kill) */
	xchar mx, my;
	xchar mux, muy;		/* where the monster thinks you are */
#define MTSZ	4
	coord mtrack[MTSZ];	/* monster track */
	int mhp, mhpmax;
	unsigned mappearance;	/* for undetected mimics and the wiz */
	uchar	 m_ap_type;	/* what mappearance is describing: */
#define M_AP_NOTHING	0	/* mappearance is unused -- monster appears
				   as itself */
#define M_AP_FURNITURE	1	/* stairs, a door, an altar, etc. */
#define M_AP_OBJECT	2	/* an object */
#define M_AP_MONSTER	3	/* a monster */

	schar mtame;		/* level of tameness, implies peaceful */
	unsigned short mintrinsics;	/* low 8 correspond to mresists */
	int mspec_used;		/* monster's special ability attack timeout */

	Bitfield(female,1);	/* is female */
	Bitfield(minvis,1);	/* currently invisible */
	Bitfield(invis_blkd,1); /* invisibility blocked */
	Bitfield(perminvis,1);	/* intrinsic minvis value */
	Bitfield(mcan,1);	/* has been cancelled */
	Bitfield(mburied,1);	/* has been buried */
	Bitfield(mundetected,1);	/* not seen in present hiding place */
				/* implies one of M1_CONCEAL or M1_HIDE,
				 * but not mimic (that is, snake, spider,
				 * trapper, piercer, eel)
				 */
	Bitfield(mcansee,1);	/* cansee 1, temp.blinded 0, blind 0 */

	Bitfield(mspeed,2);	/* current speed */
	Bitfield(permspeed,2);	/* intrinsic mspeed value */
	Bitfield(mrevived,1);	/* has been revived from the dead */
	Bitfield(mcloned,1);	/* has been cloned from another */
	Bitfield(mavenge,1);	/* did something to deserve retaliation */
	Bitfield(mflee,1);	/* fleeing */

	Bitfield(mfleetim,7);	/* timeout for mflee */
	Bitfield(msleeping,1);	/* asleep until woken */

	Bitfield(mblinded,7);	/* cansee 0, temp.blinded n, blind 0 */
	Bitfield(mstun,1);	/* stunned (off balance) */

	Bitfield(mfrozen,7);
	Bitfield(mcanmove,1);	/* paralysis, similar to mblinded */

	Bitfield(mconf,1);	/* confused */
	Bitfield(mpeaceful,1);	/* does not attack unprovoked */
	Bitfield(mtrapped,1);	/* trapped in a pit, web or bear trap */
	Bitfield(mleashed,1);	/* monster is on a leash */
	Bitfield(isshk,1);	/* is shopkeeper */
	Bitfield(isminion,1);	/* is a minion */
	Bitfield(isgd,1);	/* is guard */
	Bitfield(ispriest,1);	/* is a priest */

	Bitfield(iswiz,1);	/* is the Wizard of Yendor */
	Bitfield(wormno,5);	/* at most 31 worms on any level */
				/* 2 free bits */

#define MAX_NUM_WORMS	32	/* should be 2^(wormno bitfield size) */

	unsigned long mstrategy; /* for monsters with mflag3: current strategy */
#ifdef NHSTDC
#define STRAT_APPEARMSG	0x80000000UL
#else
#define STRAT_APPEARMSG	0x80000000L
#endif
#define STRAT_ARRIVE	0x40000000L	/* just arrived on current level */
#define STRAT_WAITFORU	0x20000000L
#define STRAT_CLOSE	0x10000000L
#define STRAT_WAITMASK	(STRAT_CLOSE | STRAT_WAITFORU)
#define STRAT_HEAL	0x08000000L
#define STRAT_GROUND	0x04000000L
#define STRAT_MONSTR	0x02000000L
#define STRAT_PLAYER	0x01000000L
#define STRAT_NONE	0x00000000L
#define STRAT_STRATMASK 0x0f000000L
#define STRAT_XMASK	0x00ff0000L
#define STRAT_YMASK	0x0000ff00L
#define STRAT_GOAL	0x000000ffL
#define STRAT_GOALX(s)	((xchar)((s & STRAT_XMASK) >> 16))
#define STRAT_GOALY(s)	((xchar)((s & STRAT_YMASK) >> 8))

	long mtrapseen;		/* bitmap of traps we've been trapped in */
	long mlstmv;		/* for catching up with lost time */
	long mspare1;
#ifndef GOLDOBJ
#define mgold mspare1
#endif
	struct obj *minvent;

	struct obj *mw;
	long misc_worn_check;
	xchar weapon_check;

	int meating;		/* monster is eating timeout */
	struct mextra *mextra;	/* point to mextra struct */
};

#define newmonst() (struct monst *)alloc(sizeof(struct monst))

/* these are in mspeed */
#define MSLOW 1		/* slow monster */
#define MFAST 2		/* speeded monster */

#define MON_WEP(mon)	((mon)->mw)
#define MON_NOWEP(mon)	((mon)->mw = (struct obj *)0)

#define DEADMONSTER(mon)	((mon)->mhp < 1)
#define is_starting_pet(mon)	((mon)->m_id == context.startingpet_mid)
#define is_vampshifter(mon)	((mon)->cham == PM_VAMPIRE || \
				 (mon)->cham == PM_VAMPIRE_LORD || \
				 (mon)->cham == PM_VLAD_THE_IMPALER)
#endif /* MONST_H */