/***************************************************************************
 *  Original Diku Mud copyright (C) 1990, 1991 by Sebastian Hammer,	   *
 *  Michael Seifert, Hans Henrik St{rfeldt, Tom Madsen, and Katja Nyboe.   *
 *									   *
 *  Merc Diku Mud improvments copyright (C) 1992, 1993 by Michael	   *
 *  Chastain, Michael Quan, and Mitchell Tse.				   *
 *									   *
 *  In order to use any part of this Merc Diku Mud, you must comply with   *
 *  both the original Diku license in 'license.doc' as well the Merc	   *
 *  license in 'license.txt'.  In particular, you may not remove either of *
 *  these copyright notices.						   *
 *									   *
 *  Much time and thought has gone into this software and you are	   *
 *  benefitting.  We hope that you share your changes too.  What goes	   *
 *  around, comes around.						   *
 ***************************************************************************/

/***************************************************************************
*	ROM 2.4 is copyright 1993-1998 Russ Taylor			   *
*	ROM has been brought to you by the ROM consortium		   *
*	    Russ Taylor (rtaylor@hypercube.org)				   *
*	    Gabrielle Taylor (gtaylor@hypercube.org)			   *
*	    Brian Moore (zump@rom.org)					   *
*	By using this code, you have agreed to follow the terms of the	   *
*	ROM license, in the file Rom24/doc/rom.license			   *
***************************************************************************/

#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include "merc.h"
#include "interp.h"

/* does aliasing and other fun stuff */
void substitute_alias ( DESCRIPTOR_DATA * d, char *argument )
{
    CHAR_DATA *ch;
    char buf[MAX_STRING_LENGTH], prefix[MAX_INPUT_LENGTH],
        name[MAX_INPUT_LENGTH];
    char *point;
    int alias;

    ch = d->original ? d->original : d->character;

    /* check for prefix */
    if ( ch->prefix[0] != '\0' && str_prefix ( "prefix", argument ) )
    {
        if ( strlen ( ch->prefix ) + strlen ( argument ) > MAX_INPUT_LENGTH )
            chsend ( "Line to long, prefix not processed.\r\n", ch );
        else
        {
            sprintf ( prefix, "%s %s", ch->prefix, argument );
            argument = prefix;
        }
    }

    if ( IS_NPC ( ch ) || ch->pcdata->alias[0] == NULL ||
         !str_prefix ( "alias", argument ) || !str_prefix ( "una", argument )
         || !str_prefix ( "prefix", argument ) )
    {
        interpret ( d->character, argument );
        return;
    }

    strcpy ( buf, argument );

    for ( alias = 0; alias < MAX_ALIAS; alias++ )   /* go through the aliases */
    {
        if ( ch->pcdata->alias[alias] == NULL )
            break;

        if ( !str_prefix ( ch->pcdata->alias[alias], argument ) )
        {
            point = one_argument ( argument, name );
            if ( !strcmp ( ch->pcdata->alias[alias], name ) )
            {
                buf[0] = '\0';
                strcat ( buf, ch->pcdata->alias_sub[alias] );
                strcat ( buf, " " );
                strcat ( buf, point );

                if ( strlen ( buf ) > MAX_INPUT_LENGTH - 1 )
                {
                    chsend ( "Alias substitution too long. Truncated.\r\n",
                             ch );
                    buf[MAX_INPUT_LENGTH - 1] = '\0';
                }
                break;
            }
        }
    }
    interpret ( d->character, buf );
}

CH_CMD ( do_alia )
{
    chsend ( "I'm sorry, alias must be entered in full.\n\r", ch );
    return;
}

CH_CMD ( do_alias )
{
    CHAR_DATA *rch;
    char arg[MAX_INPUT_LENGTH], buf[MAX_STRING_LENGTH];
    int pos;

    smash_tilde ( argument );

    if ( ch->desc == NULL )
        rch = ch;
    else
        rch = ch->desc->original ? ch->desc->original : ch;

    if ( IS_NPC ( rch ) )
        return;

    argument = one_argument ( argument, arg );

    if ( arg[0] == '\0' )
    {

        if ( rch->pcdata->alias[0] == NULL )
        {
            chsend ( "You have no aliases defined.\n\r", ch );
            return;
        }
        chsend ( "Your current aliases are:\n\r", ch );

        for ( pos = 0; pos < MAX_ALIAS; pos++ )
        {
            if ( rch->pcdata->alias[pos] == NULL ||
                 rch->pcdata->alias_sub[pos] == NULL )
                break;

            sprintf ( buf, "    %s:  %s\n\r", rch->pcdata->alias[pos],
                      rch->pcdata->alias_sub[pos] );
            chsend ( buf, ch );
        }
        return;
    }

    if ( !str_prefix ( "una", arg ) || !str_cmp ( "alias", arg ) )
    {
        chsend ( "Sorry, that word is reserved.\n\r", ch );
        return;
    }

    if ( argument[0] == '\0' )
    {
        for ( pos = 0; pos < MAX_ALIAS; pos++ )
        {
            if ( rch->pcdata->alias[pos] == NULL ||
                 rch->pcdata->alias_sub[pos] == NULL )
                break;

            if ( !str_cmp ( arg, rch->pcdata->alias[pos] ) )
            {
                sprintf ( buf, "%s aliases to '%s'.\n\r",
                          rch->pcdata->alias[pos],
                          rch->pcdata->alias_sub[pos] );
                chsend ( buf, ch );
                return;
            }
        }

        chsend ( "That alias is not defined.\n\r", ch );
        return;
    }

    if ( !str_prefix ( argument, "delete" ) ||
         !str_prefix ( argument, "prefix" ) )
    {
        chsend ( "That shall not be done!\n\r", ch );
        return;
    }

    for ( pos = 0; pos < MAX_ALIAS; pos++ )
    {
        if ( rch->pcdata->alias[pos] == NULL )
            break;

        if ( !str_cmp ( arg, rch->pcdata->alias[pos] ) )    /* redefine an alias */
        {
            free_string ( rch->pcdata->alias_sub[pos] );
            rch->pcdata->alias_sub[pos] = str_dup ( argument );
            sprintf ( buf, "%s is now realiased to '%s'.\n\r", arg,
                      argument );
            chsend ( buf, ch );
            return;
        }
    }

    if ( pos >= MAX_ALIAS )
    {
        chsend ( "Sorry, you have reached the alias limit.\n\r", ch );
        return;
    }

    /* make a new alias */
    rch->pcdata->alias[pos] = str_dup ( arg );
    rch->pcdata->alias_sub[pos] = str_dup ( argument );
    sprintf ( buf, "%s is now aliased to '%s'.\n\r", arg, argument );
    chsend ( buf, ch );
}

CH_CMD ( do_unalias )
{
    CHAR_DATA *rch;
    char arg[MAX_INPUT_LENGTH];
    int pos;
    bool found = FALSE;

    if ( ch->desc == NULL )
        rch = ch;
    else
        rch = ch->desc->original ? ch->desc->original : ch;

    if ( IS_NPC ( rch ) )
        return;

    argument = one_argument ( argument, arg );

    if ( arg[0] == '\0' )
    {
        chsend ( "Unalias what?\n\r", ch );
        return;
    }

    for ( pos = 0; pos < MAX_ALIAS; pos++ )
    {
        if ( rch->pcdata->alias[pos] == NULL )
            break;

        if ( found )
        {
            rch->pcdata->alias[pos - 1] = rch->pcdata->alias[pos];
            rch->pcdata->alias_sub[pos - 1] = rch->pcdata->alias_sub[pos];
            rch->pcdata->alias[pos] = NULL;
            rch->pcdata->alias_sub[pos] = NULL;
            continue;
        }

        if ( !strcmp ( arg, rch->pcdata->alias[pos] ) )
        {
            chsend ( "Alias removed.\n\r", ch );
            free_string ( rch->pcdata->alias[pos] );
            free_string ( rch->pcdata->alias_sub[pos] );
            rch->pcdata->alias[pos] = NULL;
            rch->pcdata->alias_sub[pos] = NULL;
            found = TRUE;
        }
    }

    if ( !found )
        chsend ( "No alias of that name to remove.\n\r", ch );
}