/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/* hack.options.c - version 1.0.3 */
/* $FreeBSD: src/games/hack/hack.options.c,v 1.5 1999/11/16 02:57:08 billf Exp $ */
/* $DragonFly: src/games/hack/hack.options.c,v 1.3 2006/08/21 19:45:32 pavalos Exp $ */

#include "hack.h"

static void parseoptions(char *, bool);

void
initoptions(void)
{
	char *opts;

	flags.time = flags.nonews = flags.notombstone = flags.end_own =
	    flags.standout = flags.nonull = FALSE;
	flags.no_rest_on_space = TRUE;
	flags.invlet_constant = TRUE;
	flags.end_top = 5;
	flags.end_around = 4;
	flags.female = FALSE;	/* players are usually male */

	if ((opts = getenv("HACKOPTIONS")))
		parseoptions(opts,TRUE);
}

static void
parseoptions(char *opts, bool from_env)
{
	char *op, *op2;
	unsigned num;
	boolean negated;

	if ((op = strchr(opts, ',')) != NULL) {
		*op++ = 0;
		parseoptions(op, from_env);
	}
	if ((op = strchr(opts, ' ')) != NULL) {
		op2 = op;
		while (*op++)
			if (*op != ' ')
				*op2++ = *op;
	}
	if (!*opts)
		return;
	negated = FALSE;
	while ((*opts == '!') || !strncmp(opts, "no", 2)) {
		if (*opts == '!')
			opts++;
		else
			opts += 2;
		negated = !negated;
	}

	if (!strncmp(opts, "standout", 8)) {
		flags.standout = !negated;
		return;
	}

	if (!strncmp(opts, "null", 3)) {
		flags.nonull = negated;
		return;
	}

	if (!strncmp(opts, "tombstone", 4)) {
		flags.notombstone = negated;
		return;
	}

	if (!strncmp(opts, "news", 4)) {
		flags.nonews = negated;
		return;
	}

	if (!strncmp(opts, "time", 4)) {
		flags.time = !negated;
		flags.botl = 1;
		return;
	}

	if (!strncmp(opts, "restonspace", 4)) {
		flags.no_rest_on_space = negated;
		return;
	}

	if (!strncmp(opts, "fixinv", 4)) {
		if (from_env)
			flags.invlet_constant = !negated;
		else
			pline("The fixinvlet option must be in HACKOPTIONS.");
		return;
	}

	if (!strncmp(opts, "male", 4)) {
		flags.female = negated;
		return;
	}
	if (!strncmp(opts, "female", 6)) {
		flags.female = !negated;
		return;
	}

	/* name:string */
	if (!strncmp(opts, "name", 4)) {
		if (!from_env) {
			pline("The playername can be set only from HACKOPTIONS.");
			return;
		}
		op = strchr(opts, ':');
		if (!op)
			goto bad;
		strncpy(plname, op + 1, sizeof(plname) - 1);
		return;
	}

	/* endgame:5t[op] 5a[round] o[wn] */
	if (!strncmp(opts, "endgame", 3)) {
		op = strchr(opts, ':');
		if (!op)
			goto bad;
		op++;
		while (*op) {
			num = 1;
			if (digit(*op)) {
				num = atoi(op);
				while (digit(*op))
					op++;
			} else if (*op == '!') {
				negated = !negated;
				op++;
			}
			switch (*op) {
			case 't':
				flags.end_top = num;
				break;
			case 'a':
				flags.end_around = num;
				break;
			case 'o':
				flags.end_own = !negated;
				break;
			default:
				goto bad;
			}
			while (letter(*++op))
				; /* nothing */
			if (*op == '/')
				op++;
		}
		return;
	}
bad:
	if (!from_env) {
		if (!strncmp(opts, "help", 4)) {
			pline("%s%s%s",
			    "To set options use `HACKOPTIONS=\"<options>\"' in your environment, or ",
			    "give the command 'o' followed by the line `<options>' while playing. ",
			    "Here <options> is a list of <option>s separated by commas.");
			pline("%s%s%s",
			    "Simple (boolean) options are rest_on_space, news, time, ",
			    "null, tombstone, (fe)male. ",
			    "These can be negated by prefixing them with '!' or \"no\".");
			pline("%s",
			    "A string option is name, as in HACKOPTIONS=\"name:Merlin-W\".");
			pline("%s%s%s",
			    "A compound option is endgame; it is followed by a description of what ",
			    "parts of the scorelist you want to see. You might for example say: ",
			    "`endgame:own scores/5 top scores/4 around my score'.");
			return;
		}
		pline("Bad option: %s.", opts);
		pline("Type `o help<cr>' for help.");
		return;
	}
	puts("Bad syntax in HACKOPTIONS.");
	puts("Use for example:");
	puts("HACKOPTIONS=\"!restonspace,notombstone,endgame:own/5 topscorers/4 around me\"");
	getret();
}

int
doset(void)
{
	char buf[BUFSZ];

	pline("What options do you want to set? ");
	getlin(buf);
	if (!buf[0] || buf[0] == '\033') {
		strcpy(buf, "HACKOPTIONS=");
		strcat(buf, flags.female ? "female," : "male,");
		if (flags.standout)
			strcat(buf, "standout,");
		if (flags.nonull)
			strcat(buf, "nonull,");
		if (flags.nonews)
			strcat(buf, "nonews,");
		if (flags.time)
			strcat(buf, "time,");
		if (flags.notombstone)
			strcat(buf, "notombstone,");
		if (flags.no_rest_on_space)
			strcat(buf, "!rest_on_space,");
		if (flags.end_top != 5 || flags.end_around != 4 || flags.end_own) {
			sprintf(eos(buf), "endgame: %u topscores/%u around me",
			    flags.end_top, flags.end_around);
			if (flags.end_own)
				strcat(buf, "/own scores");
		} else {
			char *eop = eos(buf);
			if (*--eop == ',')
				*eop = 0;
		}
		pline(buf);
	} else
		parseoptions(buf, FALSE);

	return (0);
}