/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* hack.pri.c - version 1.0.3 */
/* $FreeBSD: src/games/hack/hack.pri.c,v 1.5 1999/11/16 10:26:37 marcel Exp $ */
/* $DragonFly: src/games/hack/hack.pri.c,v 1.5 2006/08/21 19:45:32 pavalos Exp $ */

#include "hack.h"
#include <curses.h>
xchar scrlx, scrhx, scrly, scrhy;	/* corners of new area on screen */

extern char *CD;

#ifdef NEWSCR
static void	pobj(struct obj *);
#endif
static void	cornbot(int);

void
swallowed(void)
{
	char ulook[] = { "|@|" };

	ulook[1] = u.usym;

	cls();
	curs(u.ux - 1, u.uy + 1);
	fputs("/-\\", stdout);
	curx = u.ux + 2;
	curs(u.ux - 1, u.uy + 2);
	fputs(ulook, stdout);
	curx = u.ux + 2;
	curs(u.ux - 1, u.uy + 3);
	fputs("\\-/", stdout);
	curx = u.ux + 2;
	u.udispl = 1;
	u.udisx = u.ux;
	u.udisy = u.uy;
}

/* VARARGS1 */
boolean panicking;

void
panic(const char *str, ...)
{
	va_list ap;

	if (panicking++)	/* avoid loops - this should never happen*/
		exit(1);
	home();
	puts(" Suddenly, the dungeon collapses.");
	fputs(" ERROR:  ", stdout);
	va_start(ap, str);
	vprintf(str, ap);
	va_end(ap);
#ifdef DEBUG
#ifdef UNIX
	if (!fork())
		abort();	/* generate core dump */
#endif /* UNIX */
#endif /* DEBUG */
	more();			/* contains a fflush() */
	done("panicked");
}

void
atl(int x, int y, char ch)
{
	struct rm *crm = &levl[x][y];

	if (x < 0 || x > COLNO - 1 || y < 0 || y > ROWNO - 1) {
		impossible("atl(%d,%d,%c)", x, y, ch);
		return;
	}
	if (crm->seen && crm->scrsym == ch)
		return;
	crm->scrsym = ch;
	crm->new = 1;
	on_scr(x, y);
}

void
on_scr(int x, int y)
{
	if (x < scrlx)
		scrlx = x;
	if (x > scrhx)
		scrhx = x;
	if (y < scrly)
		scrly = y;
	if (y > scrhy)
		scrhy = y;
}

/* call: (x,y) - display
 *      (-1,0) - close (leave last symbol)
 *      (-1,-1)- close (undo last symbol)
 *      (-1,let)-open: initialize symbol
 *      (-2,let)-change let
 */

void
tmp_at(schar x, schar y)
{
	static schar prevx, prevy;
	static char let;

	if ((int)x == -2) {		/* change let call */
		let = y;
		return;
	}
	if ((int)x == -1 && (int)y >= 0) {	/* open or close call */
		let = y;
		prevx = -1;
		return;
	}
	if (prevx >= 0 && cansee(prevx, prevy)) {
		delay_output(50);
		prl(prevx, prevy);	/* in case there was a monster */
		at(prevx, prevy, levl[prevx][prevy].scrsym);
	}
	if (x >= 0) {			/* normal call */
		if (cansee(x, y))
			at(x, y, let);
		prevx = x;
		prevy = y;
	} else {			/* close call */
		let = 0;
		prevx = -1;
	}
}

/* like the previous, but the symbols are first erased on completion */
void
Tmp_at(schar x, schar y)
{
	static char let;
	static xchar cnt;
	static coord tc[COLNO];	/* but watch reflecting beams! */
	int xx, yy;

	if ((int)x == -1) {
		if (y > 0) {	/* open call */
			let = y;
			cnt = 0;
			return;
		}
		/* close call (do not distinguish y==0 and y==-1) */
		while (cnt--) {
			xx = tc[cnt].x;
			yy = tc[cnt].y;
			prl(xx, yy);
			at(xx, yy, levl[xx][yy].scrsym);
		}
		cnt = let = 0;	/* superfluous */
		return;
	}
	if ((int)x == -2) {	/* change let call */
		let = y;
		return;
	}
	/* normal call */
	if (cansee(x, y)) {
		if (cnt)
			delay_output(50);
		at(x, y, let);
		tc[cnt].x = x;
		tc[cnt].y = y;
		if (++cnt >= COLNO)
			panic("Tmp_at overflow?");
		levl[x][y].new = 0;	/* prevent pline-nscr erasing --- */
	}
}

void
setclipped(void)
{
	error("Hack needs a screen of size at least %d by %d.\n",
	      ROWNO + 2, COLNO);
}

void
at(xchar x, xchar y, char ch)
{
#ifndef lint
	/* if xchar is unsigned, lint will complain about if (x < 0)  */
	if (x < 0 || x > COLNO - 1 || y < 0 || y > ROWNO - 1) {
		impossible("At gets 0%o at %d %d.", ch, x, y);
		return;
	}
#endif /* lint */
	if (!ch) {
		impossible("At gets null at %d %d.", x, y);
		return;
	}
	y += 2;
	curs(x, y);
	putchar(ch);
	curx++;
}

void
prme(void)
{
	if (!Invisible)
		at(u.ux, u.uy, u.usym);
}

int
doredraw(void)
{
	docrt();
	return (0);
}

void
docrt(void)
{
	int x, y;
	struct rm *room;
	struct monst *mtmp;

	if (u.uswallow) {
		swallowed();
		return;
	}
	cls();

/* Some ridiculous code to get display of @ and monsters (almost) right */
	if (!Invisible) {
		levl[(u.udisx = u.ux)][(u.udisy = u.uy)].scrsym = u.usym;
		levl[u.udisx][u.udisy].seen = 1;
		u.udispl = 1;
	} else
		u.udispl = 0;

	seemons();		/* reset old positions */
	for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
		mtmp->mdispl = 0;
	seemons();		/* force new positions to be shown */
/* This nonsense should disappear soon --------------------------------- */

	for (y = 0; y < ROWNO; y++)
		for (x = 0; x < COLNO; x++)
			if ((room = &levl[x][y])->new) {
				room->new = 0;
				at(x, y, room->scrsym);
			} else if (room->seen)
				at(x, y, room->scrsym);
	scrlx = COLNO;
	scrly = ROWNO;
	scrhx = scrhy = 0;
	flags.botlx = 1;
	bot();
}

void
docorner(int xmin, int ymax)
{
	int x, y;
	struct rm *room;
	struct monst *mtmp;

	if (u.uswallow) {	/* Can be done more efficiently */
		swallowed();
		return;
	}
	seemons();		/* reset old positions */
	for (mtmp = fmon; mtmp; mtmp = mtmp->nmon)
		if (mtmp->mx >= xmin && mtmp->my < ymax)
			mtmp->mdispl = 0;
	seemons();		/* force new positions to be shown */

	for (y = 0; y < ymax; y++) {
		if (y > ROWNO && CD)
			break;
		curs(xmin, y + 2);
		cl_end();
		if (y < ROWNO) {
			for (x = xmin; x < COLNO; x++) {
				if ((room = &levl[x][y])->new) {
					room->new = 0;
					at(x, y, room->scrsym);
				} else if (room->seen)
					at(x, y, room->scrsym);
			}
		}
	}
	if (ymax > ROWNO) {
		cornbot(xmin - 1);
		if (ymax > ROWNO + 1 && CD) {
			curs(1, ROWNO + 3);
			cl_eos();
		}
	}
}

void
curs_on_u(void)
{
	curs(u.ux, u.uy + 2);
}

void
pru(void)
{
	if (u.udispl && (Invisible || u.udisx != u.ux || u.udisy != u.uy))
		if (!vism_at(u.udisx, u.udisy))
			newsym(u.udisx, u.udisy);
	if (Invisible) {
		u.udispl = 0;
		prl(u.ux, u.uy);
	} else if (!u.udispl || u.udisx != u.ux || u.udisy != u.uy) {
		atl(u.ux, u.uy, u.usym);
		u.udispl = 1;
		u.udisx = u.ux;
		u.udisy = u.uy;
	}
	levl[u.ux][u.uy].seen = 1;
}

#ifndef NOWORM
extern struct wseg *m_atseg;
#endif /* NOWORM */

/* print a position that is visible for @ */
void
prl(int x, int y)
{
	struct rm *room;
	struct monst *mtmp;
	struct obj *otmp;

	if (x == u.ux && y == u.uy && (!Invisible)) {
		pru();
		return;
	}
	if (!isok(x, y))
		return;
	room = &levl[x][y];
	if ((!room->typ) ||
	    (IS_ROCK(room->typ) && levl[u.ux][u.uy].typ == CORR))
		return;
	if ((mtmp = m_at(x, y)) && !mtmp->mhide &&
	    (!mtmp->minvis || See_invisible)) {
#ifndef NOWORM
		if (m_atseg)
			pwseg(m_atseg);
		else
#endif /* NOWORM */
			pmon(mtmp);
	} else if ((otmp = o_at(x, y)) && room->typ != POOL)
		atl(x, y, otmp->olet);
	else if (mtmp && (!mtmp->minvis || See_invisible)) {
		/* must be a hiding monster, but not hiding right now */
		/* assume for the moment that long worms do not hide */
		pmon(mtmp);
	} else if (g_at(x, y) && room->typ != POOL)
		atl(x, y, '$');
	else if (!room->seen || room->scrsym == ' ') {
		room->new = room->seen = 1;
		newsym(x, y);
		on_scr(x, y);
	}
	room->seen = 1;
}

char
news0(xchar x, xchar y)
{
	struct obj *otmp;
	struct trap *ttmp;
	struct rm *room;
	char tmp;

	room = &levl[x][y];
	if (!room->seen)
		tmp = ' ';
	else if (room->typ == POOL)
		tmp = POOL_SYM;
	else if (!Blind && (otmp = o_at(x, y)))
		tmp = otmp->olet;
	else if (!Blind && g_at(x, y))
		tmp = '$';
	else if (x == xupstair && y == yupstair)
		tmp = '<';
	else if (x == xdnstair && y == ydnstair)
		tmp = '>';
	else if ((ttmp = t_at(x, y)) && ttmp->tseen)
		tmp = '^';
	else
		switch (room->typ) {
		case SCORR:
		case SDOOR:
			tmp = room->scrsym;	/* %% wrong after killing mimic ! */
			break;
		case HWALL:
			tmp = '-';
			break;
		case VWALL:
			tmp = '|';
			break;
		case LDOOR:
		case DOOR:
			tmp = '+';
			break;
		case CORR:
			tmp = CORR_SYM;
			break;
		case ROOM:
			if (room->lit || cansee(x, y) || Blind)
				tmp = '.';
			else
				tmp = ' ';
			break;
		default:
			tmp = ERRCHAR;
		}
	return (tmp);
}

void
newsym(int x, int y)
{
	atl(x, y, news0(x, y));
}

/* used with wand of digging (or pick-axe): fill scrsym and force display */
/* also when a POOL evaporates */
void
mnewsym(int x, int y)
{
	struct rm *room;
	char newscrsym;

	if (!vism_at(x, y)) {
		room = &levl[x][y];
		newscrsym = news0(x, y);
		if (room->scrsym != newscrsym) {
			room->scrsym = newscrsym;
			room->seen = 0;
		}
	}
}

void
nosee(int x, int y)
{
	struct rm *room;

	if (!isok(x, y))
		return;
	room = &levl[x][y];
	if (room->scrsym == '.' && !room->lit && !Blind) {
		room->scrsym = ' ';
		room->new = 1;
		on_scr(x, y);
	}
}

#ifndef QUEST
void
prl1(int x, int y)
{
	if (u.dx) {
		if (u.dy) {
			prl(x - (2 * u.dx), y);
			prl(x - u.dx, y);
			prl(x, y);
			prl(x, y - u.dy);
			prl(x, y - (2 * u.dy));
		} else {
			prl(x, y - 1);
			prl(x, y);
			prl(x, y + 1);
		}
	} else {
		prl(x - 1, y);
		prl(x, y);
		prl(x + 1, y);
	}
}

void
nose1(int x, int y)
{
	if (u.dx) {
		if (u.dy) {
			nosee(x, u.uy);
			nosee(x, u.uy - u.dy);
			nosee(x, y);
			nosee(u.ux - u.dx, y);
			nosee(u.ux, y);
		} else {
			nosee(x, y - 1);
			nosee(x, y);
			nosee(x, y + 1);
		}
	} else {
		nosee(x - 1, y);
		nosee(x, y);
		nosee(x + 1, y);
	}
}
#endif /* QUEST */

bool
vism_at(int x, int y)
{
	struct monst *mtmp;

	return ((x == u.ux && y == u.uy && !Invisible)
		? 1 :
		(mtmp = m_at(x, y))
		? ((Blind && Telepat) || canseemon(mtmp)) :
		0);
}

#ifdef NEWSCR
static void
pobj(struct obj *obj)
{
	int show = (!obj->oinvis || See_invisible) &&
	    cansee(obj->ox, obj->oy);

	if (obj->odispl) {
		if (obj->odx != obj->ox || obj->ody != obj->oy || !show)
			if (!vism_at(obj->odx, obj->ody)) {
				newsym(obj->odx, obj->ody);
				obj->odispl = 0;
			}
	}
	if (show && !vism_at(obj->ox, obj->oy)) {
		atl(obj->ox, obj->oy, obj->olet);
		obj->odispl = 1;
		obj->odx = obj->ox;
		obj->ody = obj->oy;
	}
}
#endif /* NEWSCR */

void
unpobj(struct obj *obj)
{
	if (!vism_at(obj->ox, obj->oy))
		newsym(obj->ox, obj->oy);
}

void
seeobjs(void)
{
	struct obj *obj, *obj2;

	for (obj = fobj; obj; obj = obj2) {
		obj2 = obj->nobj;
		if (obj->olet == FOOD_SYM && obj->otyp >= CORPSE
		    && obj->age + 250 < moves)
			delobj(obj);
	}
	for (obj = invent; obj; obj = obj2) {
		obj2 = obj->nobj;
		if (obj->olet == FOOD_SYM && obj->otyp >= CORPSE
		    && obj->age + 250 < moves)
			useup(obj);
	}
}

void
seemons(void)
{
	struct monst *mtmp;

	for (mtmp = fmon; mtmp; mtmp = mtmp->nmon) {
		if (mtmp->data->mlet == ';')
			mtmp->minvis = (u.ustuck != mtmp &&
			    levl[mtmp->mx][mtmp->my].typ == POOL);
		pmon(mtmp);
#ifndef NOWORM
		if (mtmp->wormno)
			wormsee(mtmp->wormno);
#endif /* NOWORM */
	}
}

void
pmon(struct monst *mon)
{
	int show = (Blind && Telepat) || canseemon(mon);

	if (mon->mdispl) {
		if (mon->mdx != mon->mx || mon->mdy != mon->my || !show)
			unpmon(mon);
	}
	if (show && !mon->mdispl) {
		atl(mon->mx, mon->my,
		    (!mon->mappearance
		    || u.uprops[PROP(RIN_PROTECTION_FROM_SHAPE_CHANGERS)].p_flgs
		    ) ? mon->data->mlet : mon->mappearance);
		mon->mdispl = 1;
		mon->mdx = mon->mx;
		mon->mdy = mon->my;
	}
}

void
unpmon(struct monst *mon)
{
	if (mon->mdispl) {
		newsym(mon->mdx, mon->mdy);
		mon->mdispl = 0;
	}
}

void
nscr(void)
{
	int x, y;
	struct rm *room;

	if (u.uswallow || u.ux == FAR || flags.nscrinh)
		return;
	pru();
	for (y = scrly; y <= scrhy; y++)
		for (x = scrlx; x <= scrhx; x++)
			if ((room = &levl[x][y])->new) {
				room->new = 0;
				at(x, y, room->scrsym);
			}
	scrhx = scrhy = 0;
	scrlx = COLNO;
	scrly = ROWNO;
}

/* 100 suffices for bot(); no relation with COLNO */
char oldbot[100], newbot[100];

static void
cornbot(int lth)
{
	if (lth < (int)sizeof(oldbot)) {
		oldbot[lth] = 0;
		flags.botl = 1;
	}
}

void
bot(void)
{
	char *ob = oldbot, *nb = newbot;
	int i;

	if (flags.botlx)
		*ob = 0;
	flags.botl = flags.botlx = 0;
#ifdef GOLD_ON_BOTL
	sprintf(newbot,
		"Level %-2d  Gold %-5lu  Hp %3d(%d)  Ac %-2d  Str ",
		dlevel, u.ugold, u.uhp, u.uhpmax, u.uac);
#else
	sprintf(newbot,
		"Level %-2d   Hp %3d(%d)   Ac %-2d   Str ",
		dlevel, u.uhp, u.uhpmax, u.uac);
#endif /* GOLD_ON_BOTL */
	if (u.ustr > 18) {
		if (u.ustr > 117)
			strcat(newbot, "18/**");
		else
			sprintf(eos(newbot), "18/%02d", u.ustr - 18);
	} else
		sprintf(eos(newbot), "%-2d   ", u.ustr);
#ifdef EXP_ON_BOTL
	sprintf(eos(newbot), "  Exp %2d/%-5lu ", u.ulevel, u.uexp);
#else
	sprintf(eos(newbot), "   Exp %2u  ", u.ulevel);
#endif /* EXP_ON_BOTL */
	strcat(newbot, hu_stat[u.uhs]);
	if (flags.time)
		sprintf(eos(newbot), "  %ld", moves);
	if (strlen(newbot) >= COLNO) {
		char *bp0, *bp1;
		bp0 = bp1 = newbot;
		do {
			if (*bp0 != ' ' || bp0[1] != ' ' || bp0[2] != ' ')
				*bp1++ = *bp0;
		} while (*bp0++);
	}
	for (i = 1; i < COLNO; i++) {
		if (*ob != *nb) {
			curs(i, ROWNO + 2);
			putchar(*nb ? *nb : ' ');
			curx++;
		}
		if (*ob)
			ob++;
		if (*nb)
			nb++;
	}
	strcpy(oldbot, newbot);
}

#ifdef WAN_PROBING
void
mstatusline(struct monst *mtmp)
{
	pline("Status of %s: ", monnam(mtmp));
	pline("Level %-2d  Gold %-5lu  Hp %3d(%d)  Ac %-2d  Dam %d",
	    mtmp->data->mlevel, mtmp->mgold, mtmp->mhp, mtmp->mhpmax,
	    mtmp->data->ac, (mtmp->data->damn + 1) * (mtmp->data->damd + 1));
}
#endif /* WAN_PROBING */

void
cls(void)
{
	if (flags.toplin == 1)
		more();
	flags.toplin = 0;

	clear_screen();

	flags.botlx = 1;
}