/*	$NetBSD: hack.fight.c,v 1.12 2009/08/12 07:28:40 dholland Exp $	*/

/*
 * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
 * Amsterdam
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of the Stichting Centrum voor Wiskunde en
 * Informatica, nor the names of its contributors may be used to endorse or
 * promote products derived from this software without specific prior
 * written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Copyright (c) 1982 Jay Fenlason <hack@gnu.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: hack.fight.c,v 1.12 2009/08/12 07:28:40 dholland Exp $");
#endif				/* not lint */

#include "hack.h"
#include "extern.h"

static boolean  far_noise;
static long     noisetime;

static void monstone(struct monst *);

/* hitmm returns 0 (miss), 1 (hit), or 2 (kill) */
int
hitmm(struct monst *magr, struct monst *mdef)
{
	const struct permonst *pa = magr->data, *pd = mdef->data;
	int             didhit;
	schar           tmp;
	boolean         vis;

	if (strchr("Eauy", pa->mlet))
		return (0);
	if (magr->mfroz)
		return (0);	/* riv05!a3 */
	tmp = pd->ac + pa->mlevel;
	if (mdef->mconf || mdef->mfroz || mdef->msleep) {
		tmp += 4;
		if (mdef->msleep)
			mdef->msleep = 0;
	}
	didhit = (tmp > rnd(20));
	if (didhit)
		mdef->msleep = 0;
	vis = (cansee(magr->mx, magr->my) && cansee(mdef->mx, mdef->my));
	if (vis) {
		char            buf[BUFSZ];
		if (mdef->mimic)
			seemimic(mdef);
		if (magr->mimic)
			seemimic(magr);
		(void) snprintf(buf, sizeof(buf), "%s %s", Monnam(magr),
			       didhit ? "hits" : "misses");
		pline("%s %s.", buf, monnam(mdef));
	} else {
		boolean         far = (dist(magr->mx, magr->my) > 15);
		if (far != far_noise || moves - noisetime > 10) {
			far_noise = far;
			noisetime = moves;
			pline("You hear some noises%s.",
			      far ? " in the distance" : "");
		}
	}
	if (didhit) {
		if (magr->data->mlet == 'c' && !magr->cham) {
			magr->mhpmax += 3;
			if (vis)
				pline("%s is turned to stone!", Monnam(mdef));
			else if (mdef->mtame)
				pline("You have a peculiarly sad feeling for a moment, then it passes.");
			monstone(mdef);
			didhit = 2;
		} else if ((mdef->mhp -= d(pa->damn, pa->damd)) < 1) {
			magr->mhpmax += 1 + rn2(pd->mlevel + 1);
			if (magr->mtame && magr->mhpmax > 8 * pa->mlevel) {
				if (pa == &li_dog)
					magr->data = pa = &dog;
				else if (pa == &dog)
					magr->data = pa = &la_dog;
			}
			if (vis)
				pline("%s is killed!", Monnam(mdef));
			else if (mdef->mtame)
				pline("You have a sad feeling for a moment, then it passes.");
			mondied(mdef);
			didhit = 2;
		}
	}
	return (didhit);
}

/* drop (perhaps) a cadaver and remove monster */
void
mondied(struct monst *mdef)
{
	const struct permonst *pd = mdef->data;
	if (letter(pd->mlet) && rn2(3)) {
		(void) mkobj_at(pd->mlet, mdef->mx, mdef->my);
		if (cansee(mdef->mx, mdef->my)) {
			unpmon(mdef);
			atl(mdef->mx, mdef->my, fobj->olet);
		}
		stackobj(fobj);
	}
	mondead(mdef);
}

/* drop a rock and remove monster */
static void
monstone(struct monst *mdef)
{
	if (strchr(mlarge, mdef->data->mlet))
		mksobj_at(ENORMOUS_ROCK, mdef->mx, mdef->my);
	else
		mksobj_at(ROCK, mdef->mx, mdef->my);
	if (cansee(mdef->mx, mdef->my)) {
		unpmon(mdef);
		atl(mdef->mx, mdef->my, fobj->olet);
	}
	mondead(mdef);
}


int
fightm(struct monst *mtmp)
{
	struct monst   *mon;
	for (mon = fmon; mon; mon = mon->nmon)
		if (mon != mtmp) {
			if (DIST(mon->mx, mon->my, mtmp->mx, mtmp->my) < 3)
				if (rn2(4))
					return (hitmm(mtmp, mon));
		}
	return (-1);
}

/* u is hit by sth, but not a monster */
int
thitu(int tlev, int dam, const char *name)
{
	char            buf[BUFSZ];

	setan(name, buf, sizeof(buf));
	if (u.uac + tlev <= rnd(20)) {
		if (Blind)
			pline("It misses.");
		else
			pline("You are almost hit by %s!", buf);
		return (0);
	} else {
		if (Blind)
			pline("You are hit!");
		else
			pline("You are hit by %s!", buf);
		losehp(dam, name);
		return (1);
	}
}

const char mlarge[] = "bCDdegIlmnoPSsTUwY',&";

/* return TRUE if mon still alive */
boolean
hmon(struct monst *mon, struct obj *obj, int thrown)
{
	int tmp;
	boolean         hittxt = FALSE;

	if (!obj) {
		tmp = rnd(2);	/* attack with bare hands */
		if (mon->data->mlet == 'c' && !uarmg) {
			pline("You hit the cockatrice with your bare hands.");
			pline("You turn to stone ...");
			done_in_by(mon);
		}
	} else if (obj->olet == WEAPON_SYM || obj->otyp == PICK_AXE) {
		if (obj == uwep && (obj->otyp > SPEAR || obj->otyp < BOOMERANG))
			tmp = rnd(2);
		else {
			if (strchr(mlarge, mon->data->mlet)) {
				tmp = rnd(objects[obj->otyp].wldam);
				if (obj->otyp == TWO_HANDED_SWORD)
					tmp += d(2, 6);
				else if (obj->otyp == FLAIL)
					tmp += rnd(4);
			} else {
				tmp = rnd(objects[obj->otyp].wsdam);
			}
			tmp += obj->spe;
			if (!thrown && obj == uwep && obj->otyp == BOOMERANG
			    && !rn2(3)) {
				pline("As you hit %s, the boomerang breaks into splinters.",
				      monnam(mon));
				freeinv(obj);
				setworn((struct obj *) 0, obj->owornmask);
				obfree(obj, (struct obj *) 0);
				obj = NULL;
				tmp++;
			}
		}
		if (mon->data->mlet == 'O' && obj != NULL &&
		    obj->otyp == TWO_HANDED_SWORD &&
		    !strcmp(ONAME(obj), "Orcrist"))
			tmp += rnd(10);
	} else
		switch (obj->otyp) {
		case HEAVY_IRON_BALL:
			tmp = rnd(25);
			break;
		case EXPENSIVE_CAMERA:
			pline("You succeed in destroying your camera. Congratulations!");
			freeinv(obj);
			if (obj->owornmask)
				setworn((struct obj *) 0, obj->owornmask);
			obfree(obj, (struct obj *) 0);
			return (TRUE);
		case DEAD_COCKATRICE:
			pline("You hit %s with the cockatrice corpse.",
			      monnam(mon));
			if (mon->data->mlet == 'c') {
				tmp = 1;
				hittxt = TRUE;
				break;
			}
			pline("%s is turned to stone!", Monnam(mon));
			killed(mon);
			return (FALSE);
		case CLOVE_OF_GARLIC:	/* no effect against demons */
			if (strchr(UNDEAD, mon->data->mlet))
				mon->mflee = 1;
			tmp = 1;
			break;
		default:
			/* non-weapons can damage because of their weight */
			/* (but not too much) */
			tmp = obj->owt / 10;
			if (tmp < 1)
				tmp = 1;
			else
				tmp = rnd(tmp);
			if (tmp > 6)
				tmp = 6;
		}

	/****** NOTE: perhaps obj is undefined!! (if !thrown && BOOMERANG) */

	tmp += u.udaminc + dbon();
	if (u.uswallow) {
		if ((tmp -= u.uswldtim) <= 0) {
			pline("Your arms are no longer able to hit.");
			return (TRUE);
		}
	}
	if (tmp < 1)
		tmp = 1;
	mon->mhp -= tmp;
	if (mon->mhp < 1) {
		killed(mon);
		return (FALSE);
	}
	if (mon->mtame && (!mon->mflee || mon->mfleetim)) {
		mon->mflee = 1;	/* Rick Richardson */
		mon->mfleetim += 10 * rnd(tmp);
	}
	if (!hittxt) {
		if (thrown) {
			/* this assumes that we cannot throw plural things */
			if (obj == NULL)
				panic("thrown non-object");
			hit(xname(obj) /* or: objects[obj->otyp].oc_name */ ,
			    mon, exclam(tmp));
		} else if (Blind)
			pline("You hit it.");
		else
			pline("You hit %s%s", monnam(mon), exclam(tmp));
	}
	if (u.umconf && !thrown) {
		if (!Blind) {
			pline("Your hands stop glowing blue.");
			if (!mon->mfroz && !mon->msleep)
				pline("%s appears confused.", Monnam(mon));
		}
		mon->mconf = 1;
		u.umconf = 0;
	}
	return (TRUE);		/* mon still alive */
}

/* try to attack; return FALSE if monster evaded */
/* u.dx and u.dy must be set */
int
attack(struct monst *mtmp)
{
	schar           tmp;
	boolean         malive = TRUE;
	const struct permonst *mdat;
	mdat = mtmp->data;

	u_wipe_engr(3);		/* andrew@orca: prevent unlimited pick-axe
				 * attacks */

	if (mdat->mlet == 'L' && !mtmp->mfroz && !mtmp->msleep &&
	    !mtmp->mconf && mtmp->mcansee && !rn2(7) &&
	    (m_move(mtmp, 0) == 2 /* he died */ ||	/* he moved: */
	     mtmp->mx != u.ux + u.dx || mtmp->my != u.uy + u.dy))
		return (FALSE);

	if (mtmp->mimic) {
		if (!u.ustuck && !mtmp->mflee)
			u.ustuck = mtmp;
		switch (levl[u.ux + u.dx][u.uy + u.dy].scrsym) {
		case '+':
			pline("The door actually was a Mimic.");
			break;
		case '$':
			pline("The chest was a Mimic!");
			break;
		default:
			pline("Wait! That's a Mimic!");
		}
		wakeup(mtmp);	/* clears mtmp->mimic */
		return (TRUE);
	}
	wakeup(mtmp);

	if (mtmp->mhide && mtmp->mundetected) {
		struct obj     *obj;

		mtmp->mundetected = 0;
		if ((obj = o_at(mtmp->mx, mtmp->my)) && !Blind)
			pline("Wait! There's a %s hiding under %s!",
			      mdat->mname, doname(obj));
		return (TRUE);
	}
	tmp = u.uluck + u.ulevel + mdat->ac + abon();
	if (uwep) {
		if (uwep->olet == WEAPON_SYM || uwep->otyp == PICK_AXE)
			tmp += uwep->spe;
		if (uwep->otyp == TWO_HANDED_SWORD)
			tmp -= 1;
		else if (uwep->otyp == DAGGER)
			tmp += 2;
		else if (uwep->otyp == CRYSKNIFE)
			tmp += 3;
		else if (uwep->otyp == SPEAR &&
			 strchr("XDne", mdat->mlet))
			tmp += 2;
	}
	if (mtmp->msleep) {
		mtmp->msleep = 0;
		tmp += 2;
	}
	if (mtmp->mfroz) {
		tmp += 4;
		if (!rn2(10))
			mtmp->mfroz = 0;
	}
	if (mtmp->mflee)
		tmp += 2;
	if (u.utrap)
		tmp -= 3;

	/* with a lot of luggage, your agility diminishes */
	tmp -= (inv_weight() + 40) / 20;

	if (tmp <= rnd(20) && !u.uswallow) {
		if (Blind)
			pline("You miss it.");
		else
			pline("You miss %s.", monnam(mtmp));
	} else {
		/* we hit the monster; be careful: it might die! */

		if ((malive = hmon(mtmp, uwep, 0)) == TRUE) {
			/* monster still alive */
			if (!rn2(25) && mtmp->mhp < mtmp->mhpmax / 2) {
				mtmp->mflee = 1;
				if (!rn2(3))
					mtmp->mfleetim = rnd(100);
				if (u.ustuck == mtmp && !u.uswallow)
					u.ustuck = 0;
			}
#ifndef NOWORM
			if (mtmp->wormno)
				cutworm(mtmp, u.ux + u.dx, u.uy + u.dy,
					uwep ? uwep->otyp : 0);
#endif	/* NOWORM */
		}
		if (mdat->mlet == 'a') {
			if (rn2(2)) {
				pline("You are splashed by the blob's acid!");
				losehp_m(rnd(6), mtmp);
				if (!rn2(30))
					corrode_armor();
			}
			if (!rn2(6))
				corrode_weapon();
		}
	}
	if (malive && mdat->mlet == 'E' && canseemon(mtmp)
	    && !mtmp->mcan && rn2(3)) {
		if (mtmp->mcansee) {
			pline("You are frozen by the floating eye's gaze!");
			nomul((u.ulevel > 6 || rn2(4)) ? rn1(20, -21) : -200);
		} else {
			pline("The blinded floating eye cannot defend itself.");
			if (!rn2(500))
				if ((int) u.uluck > LUCKMIN)
					u.uluck--;
		}
	}
	return (TRUE);
}