/*      $OpenBSD: hack.fight.c,v 1.10 2016/01/09 18:33:15 mestre 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 <stdio.h>

#include "hack.h"

extern struct permonst li_dog, dog, la_dog;

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)
{
        struct permonst *pa = magr->data, *pd = mdef->data;
        int hit;
        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;
        }
        hit = (tmp > rnd(20));
        if(hit) 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),
                        hit ? "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(hit){
                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);
                        hit = 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);
                        hit = 2;
                }
        }
        return(hit);
}

/* drop (perhaps) a cadaver and remove monster */
void
mondied(struct monst *mdef)
{
        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)
{
        extern char mlarge[];
        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, 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);
        }
}

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);
                        tmp++;
                }
            }
            if(mon->data->mlet == 'O' && 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 */
                        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 */
boolean
attack(struct monst *mtmp)
{
        schar tmp;
        boolean malive = TRUE;
        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);
}