/*	$OpenBSD: hack.options.c,v 1.9 2009/10/27 23:59:25 deraadt 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 <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include "config.h"
#include "hack.h"

static void parseoptions(char *, boolean);

void
initoptions()
{
	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, boolean from_env)
{
	char *op,*op2;
	unsigned num;
	boolean negated;

	if ((op = strchr(opts, ','))) {
		*op++ = 0;
		parseoptions(op, from_env);
	}
	if ((op = strchr(opts, ' '))) {
		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)) {
		extern char plname[PL_NSIZ];
		if(!from_env) {
		  pline("The playername can be set only from HACKOPTIONS.");
		  return;
		}
		op = strchr(opts,':');
		if(!op) goto bad;
		(void) strlcpy(plname, op+1, sizeof(plname));
		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(isdigit(*op)) {
				num = atoi(op);
				while(isdigit(*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)) ;
			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()
{
	char buf[BUFSZ];

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

	return(0);
}