/*      $NetBSD: hack.mhitu.c,v 1.7 2009/06/07 18:30:39 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 "hack.h"
#include "extern.h"

/*
 * mhitu: monster hits you
 *        returns 1 if monster dies (e.g. 'y', 'F'), 0 otherwise
 */
int
mhitu(struct monst *mtmp)
{
        const struct permonst *mdat = mtmp->data;
        int             tmp, ctmp;

        nomul(0);

        /* If swallowed, can only be affected by hissers and by u.ustuck */
        if (u.uswallow) {
                if (mtmp != u.ustuck) {
                        if (mdat->mlet == 'c' && !rn2(13)) {
                                pline("Outside, you hear %s's hissing!",
                                      monnam(mtmp));
                                pline("%s gets turned to stone!",
                                      Monnam(u.ustuck));
                                pline("And the same fate befalls you.");
                                done_in_by(mtmp);
                                /* "notreached": not return(1); */
                        }
                        return (0);
                }
                switch (mdat->mlet) {   /* now mtmp == u.ustuck */
                case ',':
                        youswld(mtmp, (u.uac > 0) ? u.uac + 4 : 4,
                                5, "The trapper");
                        break;
                case '\'':
                        youswld(mtmp, rnd(6), 7, "The lurker above");
                        break;
                case 'P':
                        youswld(mtmp, d(2, 4), 12, "The purple worm");
                        break;
                default:
                        /* This is not impossible! */
                        pline("The mysterious monster totally digests you.");
                        u.uhp = 0;
                }
                if (u.uhp < 1)
                        done_in_by(mtmp);
                return (0);
        }
        if (mdat->mlet == 'c' && Stoned)
                return (0);

        /* make eels visible the moment they hit/miss us */
        if (mdat->mlet == ';' && mtmp->minvis && cansee(mtmp->mx, mtmp->my)) {
                mtmp->minvis = 0;
                pmon(mtmp);
        }
        if (!strchr("1&DuxynNF", mdat->mlet))
                tmp = hitu(mtmp, d(mdat->damn, mdat->damd));
        else
                tmp = 0;
        if (strchr(UNDEAD, mdat->mlet) && midnight())
                tmp += hitu(mtmp, d(mdat->damn, mdat->damd));

        ctmp = tmp && !mtmp->mcan &&
                (!uarm || objects[uarm->otyp].a_can < rnd(3) || !rn2(50));
        switch (mdat->mlet) {
        case '1':
                if (wiz_hit(mtmp))
                        return (1);     /* he disappeared */
                break;
        case '&':
                if (!mtmp->cham && !mtmp->mcan && !rn2(13)) {
                        (void) makemon(PM_DEMON, u.ux, u.uy);
                } else {
                        (void) hitu(mtmp, d(2, 6));
                        (void) hitu(mtmp, d(2, 6));
                        (void) hitu(mtmp, rnd(3));
                        (void) hitu(mtmp, rnd(3));
                        (void) hitu(mtmp, rn1(4, 2));
                }
                break;
        case ',':
                if (tmp)
                        justswld(mtmp, "The trapper");
                break;
        case '\'':
                if (tmp)
                        justswld(mtmp, "The lurker above");
                break;
        case ';':
                if (ctmp) {
                        if (!u.ustuck && !rn2(10)) {
                                pline("%s swings itself around you!",
                                      Monnam(mtmp));
                                u.ustuck = mtmp;
                        } else if (u.ustuck == mtmp &&
                                   levl[mtmp->mx][mtmp->my].typ == POOL) {
                                pline("%s drowns you ...", Monnam(mtmp));
                                done("drowned");
                        }
                }
                break;
        case 'A':
                if (ctmp && rn2(2)) {
                        if (Poison_resistance)
                                pline("The sting doesn't seem to affect you.");
                        else {
                                pline("You feel weaker!");
                                losestr(1);
                        }
                }
                break;
        case 'C':
                (void) hitu(mtmp, rnd(6));
                break;
        case 'c':
                if (!rn2(5)) {
                        pline("You hear %s's hissing!", monnam(mtmp));
                        if (ctmp || !rn2(20) || (flags.moonphase == NEW_MOON
                                               && !carrying(DEAD_LIZARD))) {
                                Stoned = 5;
                                /* pline("You get turned to stone!"); */
                                /* done_in_by(mtmp); */
                        }
                }
                break;
        case 'D':
                if (rn2(6) || mtmp->mcan) {
                        (void) hitu(mtmp, d(3, 10));
                        (void) hitu(mtmp, rnd(8));
                        (void) hitu(mtmp, rnd(8));
                        break;
                }
                kludge("%s breathes fire!", "The dragon");
                buzz(-1, mtmp->mx, mtmp->my, u.ux - mtmp->mx, u.uy - mtmp->my);
                break;
        case 'd':
                (void) hitu(mtmp, d(2, (flags.moonphase == FULL_MOON) ? 3 : 4));
                break;
        case 'e':
                (void) hitu(mtmp, d(3, 6));
                break;
        case 'F':
                if (mtmp->mcan)
                        break;
                kludge("%s explodes!", "The freezing sphere");
                if (Cold_resistance)
                        pline("You don't seem affected by it.");
                else {
                        xchar           dn;
                        if (17 - (u.ulevel / 2) > rnd(20)) {
                                pline("You get blasted!");
                                dn = 6;
                        } else {
                                pline("You duck the blast...");
                                dn = 3;
                        }
                        losehp_m(d(dn, 6), mtmp);
                }
                mondead(mtmp);
                return (1);
        case 'g':
                if (ctmp && multi >= 0 && !rn2(3)) {
                        kludge("You are frozen by %ss juices", "the cube'");
                        nomul(-rnd(10));
                }
                break;
        case 'h':
                if (ctmp && multi >= 0 && !rn2(5)) {
                        nomul(-rnd(10));
                        kludge("You are put to sleep by %ss bite!",
                               "the homunculus'");
                }
                break;
        case 'j':
                tmp = hitu(mtmp, rnd(3));
                tmp &= hitu(mtmp, rnd(3));
                if (tmp) {
                        (void) hitu(mtmp, rnd(4));
                        (void) hitu(mtmp, rnd(4));
                }
                break;
        case 'k':
                if ((hitu(mtmp, rnd(4)) || !rn2(3)) && ctmp) {
                        poisoned("bee's sting", mdat->mname);
                }
                break;
        case 'L':
                if (tmp)
                        stealgold(mtmp);
                break;
        case 'N':
                if (mtmp->mcan && !Blind) {
                        pline("%s tries to seduce you, but you seem not interested.",
                              Amonnam(mtmp, "plain"));
                        if (rn2(3))
                                rloc(mtmp);
                } else if (steal(mtmp)) {
                        rloc(mtmp);
                        mtmp->mflee = 1;
                }
                break;
        case 'n':
                if (!uwep && !uarm && !uarmh && !uarms && !uarmg) {
                        pline("%s hits! (I hope you don't mind)",
                              Monnam(mtmp));
                        u.uhp += rnd(7);
                        if (!rn2(7))
                                u.uhpmax++;
                        if (u.uhp > u.uhpmax)
                                u.uhp = u.uhpmax;
                        flags.botl = 1;
                        if (!rn2(50))
                                rloc(mtmp);
                } else {
                        (void) hitu(mtmp, d(2, 6));
                        (void) hitu(mtmp, d(2, 6));
                }
                break;
        case 'o':
                tmp = hitu(mtmp, rnd(6));
                if (hitu(mtmp, rnd(6)) && tmp &&        /* hits with both paws */
                    !u.ustuck && rn2(2)) {
                        u.ustuck = mtmp;
                        kludge("%s has grabbed you!", "The owlbear");
                        u.uhp -= d(2, 8);
                } else if (u.ustuck == mtmp) {
                        u.uhp -= d(2, 8);
                        pline("You are being crushed.");
                }
                break;
        case 'P':
                if (ctmp && !rn2(4))
                        justswld(mtmp, "The purple worm");
                else
                        (void) hitu(mtmp, d(2, 4));
                break;
        case 'Q':
                (void) hitu(mtmp, rnd(2));
                (void) hitu(mtmp, rnd(2));
                break;
        case 'R':
                if (tmp && uarmh && !uarmh->rustfree &&
                    (int) uarmh->spe >= -1) {
                        pline("Your helmet rusts!");
                        uarmh->spe--;
                } else if (ctmp && uarm && !uarm->rustfree &&   /* Mike Newton */
                           uarm->otyp < STUDDED_LEATHER_ARMOR &&
                           (int) uarm->spe >= -1) {
                        pline("Your armor rusts!");
                        uarm->spe--;
                }
                break;
        case 'S':
                if (ctmp && !rn2(8)) {
                        poisoned("snake's bite", mdat->mname);
                }
                break;
        case 's':
                if (tmp && !rn2(8)) {
                        poisoned("scorpion's sting", mdat->mname);
                }
                (void) hitu(mtmp, rnd(8));
                (void) hitu(mtmp, rnd(8));
                break;
        case 'T':
                (void) hitu(mtmp, rnd(6));
                (void) hitu(mtmp, rnd(6));
                break;
        case 't':
                if (!rn2(5))
                        rloc(mtmp);
                break;
        case 'u':
                mtmp->mflee = 1;
                break;
        case 'U':
                (void) hitu(mtmp, d(3, 4));
                (void) hitu(mtmp, d(3, 4));
                break;
        case 'v':
                if (ctmp && !u.ustuck)
                        u.ustuck = mtmp;
                break;
        case 'V':
                if (tmp)
                        u.uhp -= 4;
                if (ctmp)
                        losexp();
                break;
        case 'W':
                if (ctmp)
                        losexp();
                break;
#ifndef NOWORM
        case 'w':
                if (tmp)
                        wormhit(mtmp);
#endif  /* NOWORM */
                break;
        case 'X':
                (void) hitu(mtmp, rnd(5));
                (void) hitu(mtmp, rnd(5));
                (void) hitu(mtmp, rnd(5));
                break;
        case 'x':
                {
                        long            side = rn2(2) ? RIGHT_SIDE : LEFT_SIDE;
                        pline("%s pricks in your %s leg!",
                              Monnam(mtmp), (side == RIGHT_SIDE) ? "right" : "left");
                        set_wounded_legs(side, rnd(50));
                        losehp_m(2, mtmp);
                        break;
                }
        case 'y':
                if (mtmp->mcan)
                        break;
                mondead(mtmp);
                if (!Blind) {
                        pline("You are blinded by a blast of light!");
                        Blind = d(4, 12);
                        seeoff(0);
                }
                return (1);
        case 'Y':
                (void) hitu(mtmp, rnd(6));
                break;
        }
        if (u.uhp < 1)
                done_in_by(mtmp);
        return (0);
}

int
hitu(struct monst *mtmp, int dam)
{
        int tmp, res;

        nomul(0);
        if (u.uswallow)
                return (0);

        if (mtmp->mhide && mtmp->mundetected) {
                mtmp->mundetected = 0;
                if (!Blind) {
                        struct obj     *obj;
                        if ((obj = o_at(mtmp->mx, mtmp->my)) != NULL)
                                pline("%s was hidden under %s!",
                                      Xmonnam(mtmp), doname(obj));
                }
        }
        tmp = u.uac;
        /* give people with Ac = -10 at least some vulnerability */
        if (tmp < 0) {
                dam += tmp;     /* decrease damage */
                if (dam <= 0)
                        dam = 1;
                tmp = -rn2(-tmp);
        }
        tmp += mtmp->data->mlevel;
        if (multi < 0)
                tmp += 4;
        if ((Invis && mtmp->data->mlet != 'I') || !mtmp->mcansee)
                tmp -= 2;
        if (mtmp->mtrapped)
                tmp -= 2;
        if (tmp <= rnd(20)) {
                if (Blind)
                        pline("It misses.");
                else
                        pline("%s misses.", Monnam(mtmp));
                res = 0;
        } else {
                if (Blind)
                        pline("It hits!");
                else
                        pline("%s hits!", Monnam(mtmp));
                losehp_m(dam, mtmp);
                res = 1;
        }
        stop_occupation();
        return (res);
}