/*      $NetBSD: hack.steal.c,v 1.8 2011/08/06 20:29:37 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 <[email protected]>
* 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.steal.c,v 1.8 2011/08/06 20:29:37 dholland Exp $");
#endif                          /* not lint */

#include <stdlib.h>
#include "hack.h"
#include "extern.h"

static int stealarm(void);

/*
* actually returns something that fits in an int
*/
long
somegold(void)
{
       return ((u.ugold < 100) ? u.ugold :
               (u.ugold > 10000) ? rnd(10000) : rnd((int) u.ugold));
}

void
stealgold(struct monst *mtmp)
{
       struct gold    *gold = g_at(u.ux, u.uy);
       long            tmp;
       if (gold && (!u.ugold || gold->amount > u.ugold || !rn2(5))) {
               mtmp->mgold += gold->amount;
               freegold(gold);
               if (Invisible)
                       newsym(u.ux, u.uy);
               pline("%s quickly snatches some gold from between your feet!",
                     Monnam(mtmp));
               if (!u.ugold || !rn2(5)) {
                       rloc(mtmp);
                       mtmp->mflee = 1;
               }
       } else if (u.ugold) {
               u.ugold -= (tmp = somegold());
               pline("Your purse feels lighter.");
               mtmp->mgold += tmp;
               rloc(mtmp);
               mtmp->mflee = 1;
               flags.botl = 1;
       }
}

/* steal armor after he finishes taking it off */
static unsigned stealoid;       /* object to be stolen */
static unsigned stealmid;       /* monster doing the stealing */
static int
stealarm(void)
{
       struct monst   *mtmp;
       struct obj     *otmp;

       for (otmp = invent; otmp; otmp = otmp->nobj)
               if (otmp->o_id == stealoid) {
                       for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
                               if (mtmp->m_id == stealmid) {
                                       if (dist(mtmp->mx, mtmp->my) < 3) {
                                               freeinv(otmp);
                                               pline("%s steals %s!", Monnam(mtmp), doname(otmp));
                                               mpickobj(mtmp, otmp);
                                               mtmp->mflee = 1;
                                               rloc(mtmp);
                                       }
                                       break;
                               }
                       break;
               }
       stealoid = 0;
       return 0;
}

/* returns 1 when something was stolen */
/* (or at least, when N should flee now) */
/* avoid stealing the object stealoid */
int
steal(struct monst *mtmp)
{
       struct obj     *otmp;
       int             tmp;
       int             named = 0;

       if (!invent) {
               if (Blind)
                       pline("Somebody tries to rob you, but finds nothing to steal.");
               else
                       pline("%s tries to rob you, but she finds nothing to steal!",
                             Monnam(mtmp));
               return (1);     /* let her flee */
       }
       tmp = 0;
       for (otmp = invent; otmp; otmp = otmp->nobj)
               if (otmp != uarm2)
                       tmp += ((otmp->owornmask & (W_ARMOR | W_RING)) ? 5 : 1);
       tmp = rn2(tmp);
       for (otmp = invent; otmp; otmp = otmp->nobj)
               if (otmp != uarm2)
                       if ((tmp -= ((otmp->owornmask & (W_ARMOR | W_RING)) ? 5 : 1))
                           < 0)
                               break;
       if (!otmp) {
               impossible("Steal fails!");
               return (0);
       }
       if (otmp->o_id == stealoid)
               return (0);
       if ((otmp->owornmask & (W_ARMOR | W_RING))) {
               switch (otmp->olet) {
               case RING_SYM:
                       ringoff(otmp);
                       break;
               case ARMOR_SYM:
                       if (multi < 0 || otmp == uarms) {
                               setworn((struct obj *) 0, otmp->owornmask & W_ARMOR);
                               break;
                       } {
                               int             curssv = otmp->cursed;
                               otmp->cursed = 0;
                               stop_occupation();
                               pline("%s seduces you and %s off your %s.",
                                     Amonnam(mtmp, Blind ? "gentle" : "beautiful"),
                                     otmp->cursed ? "helps you to take"
                                     : "you start taking",
                                     (otmp == uarmg) ? "gloves" :
                                     (otmp == uarmh) ? "helmet" : "armor");
                               named++;
                               (void) armoroff(otmp);
                               otmp->cursed = curssv;
                               if (multi < 0) {
                                       /*
                                       multi = 0;
                                       nomovemsg = 0;
                                       afternmv = 0;
                                       */
                                       stealoid = otmp->o_id;
                                       stealmid = mtmp->m_id;
                                       afternmv = stealarm;
                                       return (0);
                               }
                               break;
                       }
               default:
                       impossible("Tried to steal a strange worn thing.");
               }
       } else if (otmp == uwep)
               setuwep((struct obj *) 0);
       if (otmp->olet == CHAIN_SYM) {
               impossible("How come you are carrying that chain?");
       }
       if (Punished && otmp == uball) {
               Punished = 0;
               freeobj(uchain);
               free(uchain);
               uchain = (struct obj *) 0;
               uball->spe = 0;
               uball = (struct obj *) 0;       /* superfluous */
       }
       freeinv(otmp);
       pline("%s stole %s.", named ? "She" : Monnam(mtmp), doname(otmp));
       mpickobj(mtmp, otmp);
       return ((multi < 0) ? 0 : 1);
}

void
mpickobj(struct monst *mtmp, struct obj *otmp)
{
       otmp->nobj = mtmp->minvent;
       mtmp->minvent = otmp;
}

int
stealamulet(struct monst *mtmp)
{
       struct obj     *otmp;

       for (otmp = invent; otmp; otmp = otmp->nobj) {
               if (otmp->olet == AMULET_SYM) {
                       /* might be an imitation one */
                       if (otmp == uwep)
                               setuwep((struct obj *) 0);
                       freeinv(otmp);
                       mpickobj(mtmp, otmp);
                       pline("%s stole %s!", Monnam(mtmp), doname(otmp));
                       return (1);
               }
       }
       return (0);
}

/* release the objects the killed animal has stolen */
void
relobj(struct monst *mtmp, int show)
{
       struct obj     *otmp, *otmp2;

       for (otmp = mtmp->minvent; otmp; otmp = otmp2) {
               otmp->ox = mtmp->mx;
               otmp->oy = mtmp->my;
               otmp2 = otmp->nobj;
               otmp->nobj = fobj;
               fobj = otmp;
               stackobj(fobj);
               if (show & cansee(mtmp->mx, mtmp->my))
                       atl(otmp->ox, otmp->oy, otmp->olet);
       }
       mtmp->minvent = (struct obj *) 0;
       if (mtmp->mgold || mtmp->data->mlet == 'L') {
               long            tmp;

               tmp = (mtmp->mgold > 10000) ? 10000 : mtmp->mgold;
               mkgold((long) (tmp + d(dlevel, 30)), mtmp->mx, mtmp->my);
               if (show & cansee(mtmp->mx, mtmp->my))
                       atl(mtmp->mx, mtmp->my, '$');
       }
}

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