/*      $OpenBSD: hack.steal.c,v 1.7 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 <stdlib.h>

#include "hack.h"

extern void (*afternmv)(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 */

void
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;
}

/* 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){
                                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,'$');
        }
}