/*      $NetBSD: hack.potion.c,v 1.9 2011/05/23 22:53:25 joerg 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"

static void ghost_from_bottle(void);

int
dodrink(void)
{
        struct obj     *otmp, *objs;
        struct monst   *mtmp;
        int             unkn = 0, nothing = 0;

        otmp = getobj("!", "drink");
        if (!otmp)
                return (0);
        if (!strcmp(objects[otmp->otyp].oc_descr, "smoky") && !rn2(13)) {
                ghost_from_bottle();
                goto use_it;
        }
        switch (otmp->otyp) {
        case POT_RESTORE_STRENGTH:
                unkn++;
                pline("Wow!  This makes you feel great!");
                if (u.ustr < u.ustrmax) {
                        u.ustr = u.ustrmax;
                        flags.botl = 1;
                }
                break;
        case POT_BOOZE:
                unkn++;
                pline("Ooph!  This tastes like liquid fire!");
                Confusion += d(3, 8);
                /* the whiskey makes us feel better */
                if (u.uhp < u.uhpmax)
                        losehp(-1, "bottle of whiskey");
                if (!rn2(4)) {
                        pline("You pass out.");
                        multi = -rnd(15);
                        nomovemsg = "You awake with a headache.";
                }
                break;
        case POT_INVISIBILITY:
                if (Invis || See_invisible)
                        nothing++;
                else {
                        if (!Blind)
                                pline("Gee!  All of a sudden, you can't see yourself.");
                        else
                                pline("You feel rather airy."), unkn++;
                        newsym(u.ux, u.uy);
                }
                Invis += rn1(15, 31);
                break;
        case POT_FRUIT_JUICE:
                pline("This tastes like fruit juice.");
                lesshungry(20);
                break;
        case POT_HEALING:
                pline("You begin to feel better.");
                flags.botl = 1;
                u.uhp += rnd(10);
                if (u.uhp > u.uhpmax)
                        u.uhp = ++u.uhpmax;
                if (Blind)
                        Blind = 1;      /* see on next move */
                if (Sick)
                        Sick = 0;
                break;
        case POT_PARALYSIS:
                if (Levitation)
                        pline("You are motionlessly suspended.");
                else
                        pline("Your feet are frozen to the floor!");
                nomul(-(rn1(10, 25)));
                break;
        case POT_MONSTER_DETECTION:
                if (!fmon) {
                        strange_feeling(otmp, "You feel threatened.");
                        return (1);
                } else {
                        cls();
                        for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
                                if (mtmp->mx > 0)
                                        at(mtmp->mx, mtmp->my, mtmp->data->mlet);
                        prme();
                        pline("You sense the presence of monsters.");
                        more();
                        docrt();
                }
                break;
        case POT_OBJECT_DETECTION:
                if (!fobj) {
                        strange_feeling(otmp, "You feel a pull downward.");
                        return (1);
                } else {
                        for (objs = fobj; objs; objs = objs->nobj)
                                if (objs->ox != u.ux || objs->oy != u.uy)
                                        goto outobjmap;
                        pline("You sense the presence of objects close nearby.");
                        break;
        outobjmap:
                        cls();
                        for (objs = fobj; objs; objs = objs->nobj)
                                at(objs->ox, objs->oy, objs->olet);
                        prme();
                        pline("You sense the presence of objects.");
                        more();
                        docrt();
                }
                break;
        case POT_SICKNESS:
                pline("Yech! This stuff tastes like poison.");
                if (Poison_resistance)
                        pline("(But in fact it was biologically contaminated orange juice.)");
                losestr(rn1(4, 3));
                losehp(rnd(10), "contaminated potion");
                break;
        case POT_CONFUSION:
                if (!Confusion)
                        pline("Huh, What?  Where am I?");
                else
                        nothing++;
                Confusion += rn1(7, 16);
                break;
        case POT_GAIN_STRENGTH:
                pline("Wow do you feel strong!");
                if (u.ustr >= 118)
                        break;  /* > 118 is impossible */
                if (u.ustr > 17)
                        u.ustr += rnd(118 - u.ustr);
                else
                        u.ustr++;
                if (u.ustr > u.ustrmax)
                        u.ustrmax = u.ustr;
                flags.botl = 1;
                break;
        case POT_SPEED:
                if (Wounded_legs) {
                        heal_legs();
                        unkn++;
                        break;
                }
                if (!(Fast & ~INTRINSIC))
                        pline("You are suddenly moving much faster.");
                else
                        pline("Your legs get new energy."), unkn++;
                Fast += rn1(10, 100);
                break;
        case POT_BLINDNESS:
                if (!Blind)
                        pline("A cloud of darkness falls upon you.");
                else
                        nothing++;
                Blind += rn1(100, 250);
                seeoff(0);
                break;
        case POT_GAIN_LEVEL:
                pluslvl();
                break;
        case POT_EXTRA_HEALING:
                pline("You feel much better.");
                flags.botl = 1;
                u.uhp += d(2, 20) + 1;
                if (u.uhp > u.uhpmax)
                        u.uhp = (u.uhpmax += 2);
                if (Blind)
                        Blind = 1;
                if (Sick)
                        Sick = 0;
                break;
        case POT_LEVITATION:
                if (!Levitation)
                        float_up();
                else
                        nothing++;
                Levitation += rnd(100);
                u.uprops[PROP(RIN_LEVITATION)].p_tofn = float_down;
                break;
        default:
                impossible("What a funny potion! (%u)", otmp->otyp);
                return (0);
        }
        if (nothing) {
                unkn++;
                pline("You have a peculiar feeling for a moment, then it passes.");
        }
        if (otmp->dknown && !objects[otmp->otyp].oc_name_known) {
                if (!unkn) {
                        objects[otmp->otyp].oc_name_known = 1;
                        more_experienced(0, 10);
                } else if (!objects[otmp->otyp].oc_uname)
                        docall(otmp);
        }
use_it:
        useup(otmp);
        return (1);
}

void
pluslvl(void)
{
        int num;

        pline("You feel more experienced.");
        num = rnd(10);
        u.uhpmax += num;
        u.uhp += num;
        if (u.ulevel < 14) {
                u.uexp = newuexp() + 1;
                pline("Welcome to experience level %u.", ++u.ulevel);
        }
        flags.botl = 1;
}

void
strange_feeling(struct obj *obj, const char *txt)
{
        if (flags.beginner)
                pline("You have a strange feeling for a moment, then it passes.");
        else
                pline("%s", txt);
        if (!objects[obj->otyp].oc_name_known && !objects[obj->otyp].oc_uname)
                docall(obj);
        useup(obj);
}

static const char *const bottlenames[] = {
        "bottle", "phial", "flagon", "carafe", "flask", "jar", "vial"
};

void
potionhit(struct monst *mon, struct obj *obj)
{
        const char           *botlnam = bottlenames[rn2(SIZE(bottlenames))];
        boolean         uclose, isyou = (mon == &youmonst);

        if (isyou) {
                uclose = TRUE;
                pline("The %s crashes on your head and breaks into shivers.",
                      botlnam);
                losehp(rnd(2), "thrown potion");
        } else {
                uclose = (dist(mon->mx, mon->my) < 3);
                /* perhaps 'E' and 'a' have no head? */
                pline("The %s crashes on %s's head and breaks into shivers.",
                      botlnam, monnam(mon));
                if (rn2(5) && mon->mhp > 1)
                        mon->mhp--;
        }
        pline("The %s evaporates.", xname(obj));

        if (!isyou && !rn2(3))
                switch (obj->otyp) {

                case POT_RESTORE_STRENGTH:
                case POT_GAIN_STRENGTH:
                case POT_HEALING:
                case POT_EXTRA_HEALING:
                        if (mon->mhp < mon->mhpmax) {
                                mon->mhp = mon->mhpmax;
                                pline("%s looks sound and hale again!", Monnam(mon));
                        }
                        break;
                case POT_SICKNESS:
                        if (mon->mhpmax > 3)
                                mon->mhpmax /= 2;
                        if (mon->mhp > 2)
                                mon->mhp /= 2;
                        break;
                case POT_CONFUSION:
                case POT_BOOZE:
                        mon->mconf = 1;
                        break;
                case POT_INVISIBILITY:
                        unpmon(mon);
                        mon->minvis = 1;
                        pmon(mon);
                        break;
                case POT_PARALYSIS:
                        mon->mfroz = 1;
                        break;
                case POT_SPEED:
                        mon->mspeed = MFAST;
                        break;
                case POT_BLINDNESS:
                        mon->mblinded |= 64 + rn2(64);
                        break;
                        /*
                         * case POT_GAIN_LEVEL: case POT_LEVITATION: case
                         * POT_FRUIT_JUICE: case POT_MONSTER_DETECTION: case
                         * POT_OBJECT_DETECTION: break;
                         */
                }
        if (uclose && rn2(5))
                potionbreathe(obj);
        obfree(obj, Null(obj));
}

void
potionbreathe(struct obj *obj)
{
        switch (obj->otyp) {
        case POT_RESTORE_STRENGTH:
        case POT_GAIN_STRENGTH:
                if (u.ustr < u.ustrmax)
                        u.ustr++, flags.botl = 1;
                break;
        case POT_HEALING:
        case POT_EXTRA_HEALING:
                if (u.uhp < u.uhpmax)
                        u.uhp++, flags.botl = 1;
                break;
        case POT_SICKNESS:
                if (u.uhp <= 5)
                        u.uhp = 1;
                else
                        u.uhp -= 5;
                flags.botl = 1;
                break;
        case POT_CONFUSION:
        case POT_BOOZE:
                if (!Confusion)
                        pline("You feel somewhat dizzy.");
                Confusion += rnd(5);
                break;
        case POT_INVISIBILITY:
                pline("For an instant you couldn't see your right hand.");
                break;
        case POT_PARALYSIS:
                pline("Something seems to be holding you.");
                nomul(-rnd(5));
                break;
        case POT_SPEED:
                Fast += rnd(5);
                pline("Your knees seem more flexible now.");
                break;
        case POT_BLINDNESS:
                if (!Blind)
                        pline("It suddenly gets dark.");
                Blind += rnd(5);
                seeoff(0);
                break;
                /*
                 * case POT_GAIN_LEVEL: case POT_LEVITATION: case
                 * POT_FRUIT_JUICE: case POT_MONSTER_DETECTION: case
                 * POT_OBJECT_DETECTION: break;
                 */
        }
        /* note: no obfree() */
}

/*
 * -- rudimentary -- to do this correctly requires much more work
 * -- all sharp weapons get one or more qualities derived from the potions
 * -- texts on scrolls may be (partially) wiped out; do they become blank?
 * --   or does their effect change, like under Confusion?
 * -- all objects may be made invisible by POT_INVISIBILITY
 * -- If the flask is small, can one dip a large object? Does it magically
 * --   become a jug? Etc.
 */
int
dodip(void)
{
        struct obj     *potion, *obj;

        if (!(obj = getobj("#", "dip")))
                return (0);
        if (!(potion = getobj("!", "dip into")))
                return (0);
        pline("Interesting...");
        if (obj->otyp == ARROW || obj->otyp == DART ||
            obj->otyp == CROSSBOW_BOLT) {
                if (potion->otyp == POT_SICKNESS) {
                        useup(potion);
                        if (obj->spe < 7)
                                obj->spe++;     /* %% */
                }
        }
        return (1);
}

static void
ghost_from_bottle(void)
{
        struct monst   *mtmp;

        if (!(mtmp = makemon(PM_GHOST, u.ux, u.uy))) {
                pline("This bottle turns out to be empty.");
                return;
        }
        mnexto(mtmp);
        pline("As you open the bottle, an enormous ghost emerges!");
        pline("You are frightened to death, and unable to move.");
        nomul(-3);
}