/*
 * options.c - This file has all the code for the option command
 *
 * Advanced Rogue
 * Copyright (C) 1984, 1985, 1986 Michael Morgan, Ken Dalka and AT&T
 * 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.
 */

/*
 * This file has all the code for the option command.
 * I would rather this command were not necessary, but
 * it is the only way to keep the wolves off of my back.
 *
 */

#include "curses.h"
#include <ctype.h>
#include <limits.h>
#include <string.h>
#include "rogue.h"

#define	NUM_OPTS	(sizeof optlist / sizeof (OPTION))


/*
 * description of an option and what to do with it
 */
struct optstruct {
    char	*o_name;	/* option name */
    char	*o_prompt;	/* prompt for interactive entry */
    void	*o_opt;		/* pointer to thing to set */
    void	(*o_putfunc)();	/* function to print value */
    int		(*o_getfunc)();	/* function to get value interactively */
};

typedef struct optstruct	OPTION;

void put_bool(bool *b, WINDOW *win);
int get_bool(bool *bp, WINDOW *win);
void put_str(char *str, WINDOW *win);
int get_str(char *opt, WINDOW *win);
void put_abil(int *ability, WINDOW *win);
int get_abil(int *abil, WINDOW *win);
void put_quest(int *quest, WINDOW *win);
int get_quest(int *quest, WINDOW *win);
int get_ro(WINDOW *win, int oy, int ox);

int get_str_prot(char *opt, WINDOW *win);
int get_score(char *opt, WINDOW *win);
bool allowchange(OPTION *op);

OPTION	optlist[] = {
    {"terse",	 "Terse output: ",
		 (void *) &terse,	put_bool,	get_bool	},
    {"flush",	 "Flush typeahead during battle: ",
		 (void *) &fight_flush,	put_bool,	get_bool	},
    {"jump",	 "Show position only at end of run: ",
		 (void *) &jump,	put_bool,	get_bool	},
    {"step",	"Do inventories one line at a time: ",
		(void *) &slow_invent,	put_bool,	get_bool	},
    {"askme",	"Ask me about unidentified things: ",
		(void *) &askme,	put_bool,	get_bool	},
    {"pickup",  "Pick things up automatically: ",
		(void *) &auto_pickup,	put_bool,	get_bool	},
    {"overlay", "Overlay menu: ",
		(void *) &menu_overlay,	put_bool,	get_bool	},
    {"name",	 "Name: ",
		(void *) whoami,	put_str,	get_str_prot	},
    {"file",	 "Save file: ",
		(void *) file_name,	put_str,	get_str_prot	},
    {"score",	 "Score file: ",
		(void *) score_file,	put_str,	get_score	},
    {"class",	"Character class: ",
		(void *)&char_type,	put_abil,	get_abil	},
    {"quest",	"Quest item: ",
		(void *) &quest_item,	put_quest,	get_quest	}
};

/*
 * The ability field is read-only
 */
int
get_abil(int *abil, WINDOW *win)
{
    register int oy, ox;

    getyx(win, oy, ox);
    put_abil(abil, win);
    return get_ro(win, oy, ox);
}

/*
 * The quest field is read-only
 */
int
get_quest(int *quest, WINDOW *win)
{
    register int oy, ox;

    getyx(win, oy, ox);
    waddstr(win, rel_magic[*quest].mi_name);
    return get_ro(win, oy, ox);
}

/*
 * get_ro:
 *	"Get" a read-only value.
 */

int
get_ro(WINDOW *win, int oy, int ox)
{
    register int ny, nx;
    register bool op_bad;
    
    op_bad = TRUE;
    getyx(win, ny, nx);
    while(op_bad)	
    {
	wmove(win, oy, ox);
	draw(win);
	switch (wgetch(win))
	{
	    case '\n':
	    case '\r':
		op_bad = FALSE;
		break;
	    case '\033':
	    case '\007':
		return QUIT;
	    case '-':
		return MINUS;
	    default:
		mvwaddstr(win, ny, nx + 5, "(no change allowed)");
	}
    }
    wmove(win, ny, nx + 5);
    wclrtoeol(win);
    wmove(win, ny, nx);
    waddch(win, '\n');
    return NORM;
}

/*
 * allow changing a boolean option and print it out
 */

int
get_bool(bool *bp, WINDOW *win)
{
    register int oy, ox;
    register bool op_bad;

    op_bad = TRUE;
    getyx(win, oy, ox);
    waddstr(win, *bp ? "True" : "False");
    while(op_bad)	
    {
	wmove(win, oy, ox);
	draw(win);
	switch (wgetch(win))
	{
	    case 't':
	    case 'T':
		*bp = TRUE;
		op_bad = FALSE;
		break;
	    case 'f':
	    case 'F':
		*bp = FALSE;
		op_bad = FALSE;
		break;
	    case '\n':
	    case '\r':
		op_bad = FALSE;
		break;
	    case '\033':
	    case '\007':
		return QUIT;
	    case '-':
		return MINUS;
	    default:
		mvwaddstr(win, oy, ox + 10, "(T or F)");
	}
    }
    wmove(win, oy, ox);
    wclrtoeol(win);
    waddstr(win, *bp ? "True" : "False");
    waddch(win, '\n');
    return NORM;
}


/*
 * set a string option
 */
int
get_str(char *opt, WINDOW *win)
{
    register char *sp;
    register int c, oy, ox;
    char buf[LINELEN];

    draw(win);
    getyx(win, oy, ox);
    /*
     * loop reading in the string, and put it in a temporary buffer
     */
    for (sp = buf;
	(c = md_readchar(win)) != '\n'	&& 
	c != '\r'			&& 
	c != '\033'			&& 
	c != '\007'			&&
	sp < &buf[LINELEN-1];
	wclrtoeol(win), draw(win))
    {
	if (c == -1)
	    continue;
	else if (c == md_erasechar()) /* process erase character */
	{
	    if (sp > buf)
	    {
		register int i;

		sp--;
		for (i = strlen(unctrl(*sp)); i; i--)
		    waddch(win, '\b');
	    }
	    continue;
	}
	else if (c == md_killchar()) /* process kill character */
	{
	    sp = buf;
	    wmove(win, oy, ox);
	    continue;
	}
	else if (sp == buf)
	{
	    if (c == '-' && win == hw)	/* To move back a line in hw */
		break;
	    else if (c == '~')
	    {
		strcpy(buf, home);
		waddstr(win, home);
		sp += strlen(home);
		continue;
	    }
	}
	*sp++ = c;
	waddstr(win, unctrl(c));
    }
    *sp = '\0';
    if (sp > buf)	/* only change option if something has been typed */
	strucpy(opt, buf, strlen(buf));
    wmove(win, oy, ox);
    waddstr(win, opt);
    waddch(win, '\n');
    draw(win);
    if (win == msgw)
	mpos += (int)(sp - buf);
    if (c == '-')
	return MINUS;
    else if (c == '\033' || c == '\007')
	return QUIT;
    else
	return NORM;
}



/*
 * print and then set options from the terminal
 */
void
option(void)
{
    register OPTION	*op;
    register int	retval;

    wclear(hw);
    touchwin(hw);
    /*
     * Display current values of options
     */
    for (op = optlist; op <= &optlist[NUM_OPTS-1]; op++)
    {
	waddstr(hw, op->o_prompt);
	(*op->o_putfunc)(op->o_opt, hw);
	waddch(hw, '\n');
    }
    /*
     * Set values
     */
    wmove(hw, 0, 0);
    for (op = optlist; op <= &optlist[NUM_OPTS-1]; op++)
    {
	waddstr(hw, op->o_prompt);
	if ((retval = (*op->o_getfunc)(op->o_opt, hw)))
	{
	    if (retval == QUIT)
		break;
	    else if (op > optlist) {	/* MINUS */
		wmove(hw, (int)(op - optlist) - 1, 0);
		op -= 2;
	    }
	    else	/* trying to back up beyond the top */
	    {
		putchar('\007');
		wmove(hw, 0, 0);
		op--;
	    }
	}
    }
    /*
     * Switch back to original screen
     */
    mvwaddstr(hw, lines-1, 0, spacemsg);
    draw(hw);
    wait_for(' ');
    clearok(cw, TRUE);
    touchwin(cw);
    after = FALSE;
}

/*
 * parse options from string, usually taken from the environment.
 * the string is a series of comma seperated values, with booleans
 * being stated as "name" (true) or "noname" (false), and strings
 * being "name=....", with the string being defined up to a comma
 * or the end of the entire option string.
 */

void
parse_opts(char *str)
{
    register char *sp;
    register OPTION *op;
    register int len;

    while (*str)
    {
	/*
	 * Get option name
	 */
	for (sp = str; isalpha(*sp); sp++)
	    continue;
	len = (int)(sp - str);
	/*
	 * Look it up and deal with it
	 */
	for (op = optlist; op <= &optlist[NUM_OPTS-1]; op++)
	{
	    if (EQSTR(str, op->o_name, len))
	    {
		if (op->o_putfunc == put_bool)	/* if option is a boolean */
		    *(bool *)op->o_opt = TRUE;
		else				/* string option */
		{
		    register char *start;
		    char value[LINELEN];

		    /*
		     * Skip to start of string value
		     */
		    for (str = sp + 1; *str == '='; str++)
			continue;
		    if (*str == '~')
		    {
			strcpy((char *) value, home);
			start = (char *) value + strlen(home);
			while (*++str == '/')
			    continue;
		    }
		    else
			start = (char *) value;
		    /*
		     * Skip to end of string value
		     */
		    for (sp = str + 1; *sp && *sp != ','; sp++)
			continue;
		    strucpy(start, str, sp - str);

		    /* Put the value into the option field */
		    if (op->o_putfunc != put_abil) 
		    {
			if (allowchange(op))
			    strcpy((char *)op->o_opt, (char *)value);
		    }

		    else if (*(int *)op->o_opt == -1) {
			/* Only init ability once */
			register int len = strlen(value);
			register int i;

			if (isupper(value[0])) value[0] = tolower(value[0]);
			for (i=0; i<NUM_CHARTYPES-1; i++) {
			    if (EQSTR(value, char_class[i].name, len)) {
				*(int *)op->o_opt = i;
				break;
			    }
			}
		    }
		}
		break;
	    }
	    /*
	     * check for "noname" for booleans
	     */
	    else if (op->o_putfunc == put_bool
	      && EQSTR(str, "no", 2) && EQSTR(str + 2, op->o_name, len - 2))
	    {
		*(bool *)op->o_opt = FALSE;
		break;
	    }
	}

	/*
	 * skip to start of next option name
	 */
	while (*sp && !isalpha(*sp))
	    sp++;
	str = sp;
    }
}


/*
 * print the character type
 */
void
put_abil(int *ability, WINDOW *win)
{
    waddstr(win, char_class[*ability].name);
}


/*
 * print out the quest
 */

void
put_quest(int *quest, WINDOW *win)
{
    waddstr(win, rel_magic[*quest].mi_name);
}


/*
 * put out a boolean
 */
void
put_bool(bool *b, WINDOW *win)
{
    waddstr(win, *b ? "True" : "False");
}




/*
 * put out a string
 */
void
put_str(char *str, WINDOW *win)
{
    waddstr(win, str);
}

/* Like get_str, but disallows changes when use_savedir is set. */
int
get_str_prot(char *opt, WINDOW *win)
{
    int oy, ox;

    if (use_savedir) {
        getyx(win, oy, ox);
        waddstr(win, opt);
        return get_ro(win, oy, ox);
    }
    else {
        return get_str(opt, win);
    }
}

/* When getting the scorefile, the new file must be opened. */
int
get_score(char *optstr, WINDOW *win)
{
    char old_score_file[PATH_MAX];
    int status;

    if (use_savedir)
        return get_str_prot(optstr, win);

    strcpy(old_score_file, optstr);
    status = get_str(optstr, win);
    if (status == NORM && strcmp(old_score_file, optstr))
    {
        reopen_score();
    }
    return status;
}

bool
allowchange(OPTION *op)
{
    if (!use_savedir)
        return TRUE;
    if (!strcmp(op->o_name, "name"))
        return FALSE;
    if (!strcmp(op->o_name, "file"))
        return FALSE;
    if (!strcmp(op->o_name, "score"))
        return FALSE;
    return TRUE;
}