/*
 * Read a scroll and let it happen
 *
 * @(#)scrolls.c	9.0	(rdk)	 7/17/84
 *
 * Super-Rogue
 * Copyright (C) 1984 Robert D. Kindelberger
 * All rights reserved.
 *
 * Based on "Rogue: Exploring the Dungeons of Doom"
 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
 * All rights reserved.
 *
 * See the file LICENSE.TXT for full copyright and licensing information.
 */

#include <ctype.h>
#include "rogue.h"
#include "rogue.ext"

/*
 * read_scroll:
 *	Let the hero read a scroll
 */
read_scroll()
{
	reg struct object *obj;
	reg struct linked_list *item;
	reg int i, j, wh;
	reg char ch, nch;
	struct room *rp;
	struct linked_list *titem;
	char buf[LINLEN];
	bool bless, curse;

	if ((item = get_item("read", SCROLL)) == NULL)
		return;
	obj = OBJPTR(item);
	if (obj->o_type != SCROLL) {
		msg("Nothing to read.");
		after = FALSE;
		return;
	}
	msg("As you read the scroll, it vanishes.");
	wh = obj->o_which;
	bless = o_on(obj, ISBLESS);
	curse = o_on(obj, ISCURSED);
	del_pack(item);		/* Get rid of the thing */

	/*
	 * Calculate the effect it has on the hero
	 */
	switch(wh) {
	case S_KNOWALL:
		if (!curse) {
			idenpack();				/* identify all the pack */
			msg("You feel more knowledgable.");
			chg_abil(WIS,1,TRUE);
			s_know[S_KNOWALL] = TRUE;
		}
	when S_CONFUSE:
		if (!curse) {
			/*
			 * Scroll of monster confusion.  Give him that power.
			 */
			msg("Your hands begin to glow red.");
			player.t_flags |= CANHUH;
			s_know[S_CONFUSE] = TRUE;
		}
	when S_LIGHT:
		rp = player.t_room;
		if (!curse) {
			if (rp == NULL) {
				s_know[S_LIGHT] = TRUE;
				msg("The corridor glows and then fades.");
			}
			else {
				if (rf_on(rp,ISDARK)) {
					s_know[S_LIGHT] = TRUE;
					msg("The room is lit.");
					rp->r_flags &= ~ISDARK;
				}
				light(&hero);
				mvwaddch(cw, hero.y, hero.x, PLAYER);
			}
		}
	when S_ARMOR:
		if (!curse) {
			if (cur_armor != NULL && o_off(cur_armor,ISPROT)) {
				s_know[S_ARMOR] = TRUE;
				msg("Your armor glows faintly for a moment.");
				if (o_on(cur_armor,ISCURSED))
					cur_armor->o_ac = armors[cur_armor->o_which].a_class;
				else
					cur_armor->o_ac--;
				resoflg(cur_armor,ISCURSED);
			}
		}
	when S_HOLD:
		if (!curse) {
			/*
			 * Hold monster scroll.  Stop all monsters within 3 spaces
			 * from chasing after the hero.
			 */
			reg int x,y;
			reg struct linked_list *mon;

			for (x = hero.x - 3; x <= hero.x + 3; x++) {
				for (y = hero.y - 3; y <= hero.y + 3; y++) {
					if (y > 0 && x > 0 && isalpha(mvwinch(mw, y, x))) {
						if ((mon = find_mons(y, x)) != NULL) {
							reg struct thing *th;

							th = THINGPTR(mon);
							th->t_flags &= ~ISRUN;
							th->t_flags |= ISHELD;
							th->t_flags |= ISSTUCK;
						}
					}
				}
			}
		}
	when S_SLEEP:
		/*
		 * Scroll which makes you fall asleep
		 */
		if (!bless) {
			s_know[S_SLEEP] = TRUE;
			msg("You fall asleep.");
			player.t_nocmd += 4 + rnd(SLEEPTIME);
		}
	when S_CREATE:
		if (!bless) {
			if (makemons(mtlev[rnd(levcount)]->m_show))
				s_know[S_CREATE] = TRUE;
			else
				msg("You hear a faint cry of anguish in the distance.");
		}
	when S_IDENT:
		if (!curse) {
			msg("This scroll is an identify scroll");
			s_know[S_IDENT] = TRUE;
			whatis(NULL);
		}
	when S_MAP:
		if (curse)
			break;
		s_know[S_MAP] = TRUE;
		addmsg("Oh, now this scroll has a ");
		if (rnd(100) < 10 || bless) {
			addmsg("very detailed map on it.");
			endmsg();
			displevl();
		}
		else {
			addmsg("map on it.");
			endmsg();
			overwrite(stdscr, hw);
			for (i = 1; i < LINES - 2; i++) {
				for (j = 0; j < COLS; j++) {
					switch (nch = ch = mvwinch(hw, i, j)) {
						case SECRETDOOR:
							nch = DOOR;
							mvaddch(i, j, nch);
						case '-':
						case '|':
						case DOOR:
						case PASSAGE:
						case ' ':
						case STAIRS:
							if (mvwinch(mw, i, j) != ' ') {
								struct thing *it;
								struct linked_list *blah;

								blah = find_mons(i, j);
								if (blah != NULL) {
									it = THINGPTR(blah);
									if (it->t_oldch == ' ')
										it->t_oldch = nch;
								}
							}
							break;
						default:
							nch = ' ';
					}
					if (nch != ch)
						waddch(hw, nch);
				}
			}
			overlay(cw, hw);
			overwrite(hw, cw);
		}
	when S_GFIND:
		if (!curse) {
			int gtotal = 0;
			struct room *rp;

			wclear(hw);
			for (rp = rooms; rp < &rooms[MAXROOMS]; rp++) {
				gtotal += rp->r_goldval;
				if (rp->r_goldval != 0 &&
				  mvinch(rp->r_gold.y,rp->r_gold.x) == GOLD)
					mvwaddch(hw,rp->r_gold.y,rp->r_gold.x,GOLD);
			}
			if (gtotal) {
				s_know[S_GFIND] = TRUE;
				msg("You begin to feel greedy and sense gold.");
				overlay(hw,cw);
			}
			else
				msg("You begin to feel a pull downward.");
		}
	when S_TELEP:
		if (!curse) {
			int rm;
			struct room *cur_room;

			cur_room = player.t_room;
			rm = teleport(rndspot, &player);
			if (cur_room != &rooms[rm])
				s_know[S_TELEP] = TRUE;
		}
	when S_ENCH:
		if (!curse) {
			if (cur_weapon == NULL || (cur_weapon != NULL &&
			  (o_on(cur_weapon,ISPROT) || cur_weapon->o_type != WEAPON)))
				msg("You feel a strange sense of loss.");
			else {
				s_know[S_ENCH] = TRUE;
				if (o_on(cur_weapon,ISCURSED)) {
					resoflg(cur_weapon,ISCURSED);
					cur_weapon->o_hplus = rnd(2);
					cur_weapon->o_dplus = rnd(2);
				}
				else {		/* weapon was not cursed here */
					if (rnd(100) < 50)
						cur_weapon->o_hplus += 1;
					else
						cur_weapon->o_dplus += 1;
				}
				setoflg(cur_weapon, ISKNOW);
				msg("Your %s glows blue for a moment.",
				  w_magic[cur_weapon->o_which].mi_name);
			}
		}
	when S_SCARE:
		/*
		 * A monster will refuse to step on a scare monster scroll
		 * if it is dropped.  Thus reading it is a mistake and produces
		 * laughter at the poor rogue's boo boo.
		 */
		msg("You hear maniacal laughter in the distance.");
	when S_REMOVE:
		if (!curse) {
			if (cur_armor != NULL && o_off(cur_armor,ISPROT))
				resoflg(cur_armor,ISCURSED);
			if (cur_weapon != NULL && o_off(cur_weapon,ISPROT))
				resoflg(cur_weapon,ISCURSED);
			if (cur_ring[LEFT]!=NULL && o_off(cur_ring[LEFT],ISPROT))
				resoflg(cur_ring[LEFT],ISCURSED);
			if (cur_ring[RIGHT]!=NULL && o_off(cur_ring[RIGHT],ISPROT))
				resoflg(cur_ring[RIGHT],ISCURSED);
			msg("You feel as if somebody is watching over you.");
			s_know[S_REMOVE] = TRUE;
		}
	when S_AGGR:
		if (!bless) {
			if (mlist != NULL) {
				aggravate();
				msg("You hear a high pitched humming noise.");
				s_know[S_AGGR] = TRUE;
			}
		}
	when S_NOP:
		msg("This scroll seems to be blank.");
	when S_GENOCIDE:
		if (!curse) {
			msg("You have been granted the boon of genocide.");
			genocide();
			s_know[S_GENOCIDE] = TRUE;
		}
	when S_DCURSE:
		if (!bless) {
			struct linked_list *ll;
			struct object *lb;

			msg("Your pack shudders.");
			for (ll = pack ; ll != NULL ; ll = next(ll)) {
				lb = OBJPTR(ll);
				if (o_off(lb,ISPROT)) {
					resoflg(lb, ISBLESS);
					setoflg(lb, ISCURSED);
				}
			}
		}
	when S_DLEVEL:
		if (!bless) {
			int much = rnd(9) - 4;

			if (much != 0) {
				level += much;
				if (level < 1)
					level = 1;
				mpos = 0;
				new_level(NORMLEV);		/* change levels */
				msg("You are whisked away to another region.");
				s_know[S_DLEVEL] = TRUE;
			}
		}
	when S_PROTECT:
		if (!curse) {
			struct linked_list *ll;
			struct object *lb;

			msg("You are granted the power of protection.");
			if ((ll = get_item("protect",0)) != NULL) {
				lb = OBJPTR(ll);
				setoflg(lb,ISPROT);
				mpos = 0;
				msg("Protected %s.",inv_name(lb,TRUE));
			}
			s_know[S_PROTECT] = TRUE;
		}
	when S_ALLENCH:
		if (!curse) {
			struct linked_list *ll;
			struct object *lb;
			int howmuch, ac, good;

			msg("You are granted the power of enchantment.");
			good = TRUE;
			if ((ll = get_item("enchant",0)) != NULL) {
				lb = OBJPTR(ll);
				resoflg(lb,ISCURSED);
				resoflg(lb,ISPROT);
				howmuch = rnd(3) + 1;
				switch(lb->o_type) {
					case RING:
						if (lb->o_ac < 0)
							lb->o_ac = 0;
						lb->o_ac += howmuch;
					when ARMOR:
						ac = armors[lb->o_which].a_class;
						if (lb->o_ac > ac)
							lb->o_ac = ac;
						lb->o_ac -= howmuch;
					when STICK:
						lb->o_charges += howmuch + 10;
					when WEAPON:
						if (lb->o_dplus < 0)
							lb->o_dplus = 0;
						if (lb->o_hplus < 0)
							lb->o_hplus = 0;
						lb->o_hplus += howmuch;
						lb->o_dplus += howmuch;
					otherwise:
						msg("You are injured as the scroll flashes & bursts into flames !!!");
						chg_hpt(-roll(6,6),FALSE,K_SCROLL);
						good = FALSE;
				}
				if (good) {
					mpos = 0;
					msg("Enchanted %s.",inv_name(lb,TRUE));
				}
			}
			s_know[S_ALLENCH] = TRUE;
		}
	when S_BLESS:
		if (!curse) {
			struct linked_list *ll;
			struct object *lb;

			msg("Your pack glistens brightly.");
			for (ll = pack ; ll != NULL ; ll = next(ll)) {
				whatis(ll);
				lb = OBJPTR(ll);
				resoflg(lb,ISCURSED);
				setoflg(lb,ISBLESS);
			}
		}
	when S_MAKEIT:
		if (!curse) {
			msg("You have been endowed with the power of creation.");
			s_know[S_MAKEIT] = TRUE;
			create_obj(TRUE);
		}
	when S_BAN: {
		int howdeep;
		char *ptr;

		if (bless) {
			if (level > 6) {
				howdeep = 1 + rnd(5);
				ptr = "elevated to the upper";
			}
			else {
				howdeep = -1;
				bless = FALSE;
			}
		}
		else {
			howdeep = level + 10 + rnd(20) + (curse * 20);
			ptr = "banished to the lower";
		}
		if ((!bless && level < howdeep) || bless) {
			level = howdeep;
			new_level(NORMLEV);
			mpos = 0;
			msg("You are %s regions.", ptr);
			s_know[S_BAN] = TRUE;
		}
	}
	when S_CWAND:
		if (!curse) {
			struct linked_list *ll;
			struct object *lb;
			bool wands = FALSE;

			for (ll = pack ; ll != NULL ; ll = next(ll)) {
				lb = OBJPTR(ll);
				if (lb->o_type == STICK) {
					whatis(ll);
					setoflg(lb, ISKNOW);
					resoflg(lb, ISCURSED);
					lb->o_charges += rnd(11) + 5;
					wands = TRUE;
				}
			}
			if (wands) {
				msg("Your sticks gleam.");
				s_know[wh] = TRUE;
			}
		}
	when S_LOCTRAP: {
		struct trap *trp;

		if (ntraps > 0) {
			for (trp = &traps[0]; trp < &traps[ntraps]; trp++)
				trp->tr_flags |= ISFOUND;
			look(FALSE);
			msg("You now recognize pitfalls.");
			s_know[S_LOCTRAP] = TRUE;
		}
	}
	otherwise:
		msg("What a puzzling scroll!");
		return;
	}
	look(TRUE);
	nochange = FALSE;
	if (s_know[wh] && s_guess[wh]) {
		free(s_guess[wh]);
		s_guess[wh] = NULL;
	}
	else if (!s_know[wh] && s_guess[wh] == NULL) {
		strcpy(buf, s_names[wh]);
		msg(callit);
		if (get_str(buf, cw) == NORM) {
			s_guess[wh] = new(strlen(buf) + 1);
			strcpy(s_guess[wh], buf);
		}
	}
}