/* Do not remove the headers from this file! see /USAGE for more info. */

/*
** cmd.c -- general command processing
*/

#include <daemons.h>
#include <commands.h>

object query_link();			// in /std/body.c
void force_look(int force_long_desc);	// in /std/body.c
string move(object location);		// in /std/object/move.c
mixed expand_if_alias(string input);	// in /std/body/alias.c
object query_mailer();			// in /std/body/mailbase.c


/* forward decl */
string history_and_alias_processing( string arg );


private nosave string array nonsense_msgs;

string nonsense()
{
    if (!nonsense_msgs)
	nonsense_msgs = MESSAGES_D->get_messages("nonsense");
    return choice(nonsense_msgs) + "\n";
}

mixed *debug_ids(object ob) {
   return ({ ob, ob->query_id() });
}

varargs nomask int do_game_command(string str, int debug)
{
    mixed result;
    mixed go_result;
    object *objs;
    object rootenv;

    /*
    ** We can't try parsing the user has no environment.  We should
    ** move them to the VOID area and continue processing.
    */
    if ( !environment(this_object()) )
    {
	write("Oops!  You're lost.  Moving to the void...\n");
	move(load_object(VOID_ROOM));
	force_look(0);
    }

/*
** First we have to get the list of objects that are going to be available
** in the parse.
*/
    rootenv = parser_root_environment(environment(this_object()) );
    objs = ({ rootenv, deep_useful_inv_parser_formatted(rootenv) });
//RABUG(sprintf("do_game_command: (parseable objects: %O)", map(objs, (: debug_ids :) )));

    /*
    ** Parse the player's input
    */
    result = parse_sentence(str, debug, objs);

    /*
    ** If a string was returned, then the parser figured something out.
    ** Write it out and we're done .
    */

    if ( stringp(result) )
    {
	if(debug)
	    return result;
	if( result[<1] != '\n')
	    result += "\n";
	write( result );
	return 1;
    }

    /*
    ** If the result is 0, the parser didn't know the verb so we keep looking.
    ** If a 1 was returned, then nothing more needs to be done.
    ** If the result is -1 or -2, the parser figured something was wrong.
    **
    */
    switch(result)
    {
    case 0:
	break;
    case 1:
	return 1;
    case -1:
	write(nonsense());
	return 1;
    case -2:
	write("You aren't able to do that.\n");
	return 1;
    default:
	write("This parser code should never be reached. If it is, let "
	  "someone know how you got here.\n");
	if( undefinedp( result )) write("Result was undefined.\n");
	else
	{
	    write( "Error was: " );
	    write(result); write("\n");
	}
	return 1;
    }


    // If in debug mode, we're done
    if (debug) return 1;

    /*
    ** Check if they typed an exit
    */
    go_result = parse_sentence("go " + str);
    if (go_result == 1)
	return 1;
    if (!result)
	result = go_result;

    /* 'You can't go ...' is a parser generated message for general
       failure.  The go command is careful to return explicit
       error messages if the command makes sense, so we can safely
       ignore it. */
    /* With the changing of exits to be more than just strings, the above is 
     * no longer sufficient.  If the object is not found, an entirely 
     * different error message is passed that we have to catch as well.
     * That one being 'There is no ...' */
    if (stringp(result) && 
	(result[0..12] != "You can't go " && result[0..11] != "There is no ")) 
	{
	write(result);
	return 1;
    }
    return 0;
}

nomask void force_game_command(string str)
{
    object save_this_user = this_user();

    set_this_player(query_link());
    if (!do_game_command(str))
	write(nonsense());
    set_this_player(save_this_user);
}