/*
===========================================================================

Return to Castle Wolfenstein single player GPL Source Code
Copyright (C) 1999-2010 id Software LLC, a ZeniMax Media company. 

This file is part of the Return to Castle Wolfenstein single player GPL Source Code (“RTCW SP Source Code”).  

RTCW SP Source Code is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

RTCW SP Source Code is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with RTCW SP Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the RTCW SP Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the RTCW SP Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

//===========================================================================
//
// Name:			l_bsp_ent.c
// Function:		bsp entity parsing
// Programmer:		Mr Elusive (MrElusive@demigod.demon.nl)
// Last update:		1999-04-05
// Tab Size:		3
// Notes:			-
//===========================================================================

#include "l_cmd.h"
#include "l_math.h"
#include "l_mem.h"
#include "l_log.h"
#include "../botlib/l_script.h"
#include "l_bsp_ent.h"

#define MAX_KEY     32
#define MAX_VALUE   1024

int num_entities;
entity_t entities[MAX_MAP_ENTITIES];

void StripTrailing( char *e ) {
	char    *s;

	s = e + strlen( e ) - 1;
	while ( s >= e && *s <= 32 )
	{
		*s = 0;
		s--;
	}
}

/*
=================
ParseEpair
=================
*/
epair_t *ParseEpair( script_t *script ) {
	epair_t *e;
	token_t token;

	e = GetMemory( sizeof( epair_t ) );
	memset( e, 0, sizeof( epair_t ) );

	PS_ExpectAnyToken( script, &token );
	StripDoubleQuotes( token.string );
	if ( strlen( token.string ) >= MAX_KEY - 1 ) {
		Error( "ParseEpair: token %s too long", token.string );
	}
	e->key = copystring( token.string );
	PS_ExpectAnyToken( script, &token );
	StripDoubleQuotes( token.string );
	if ( strlen( token.string ) >= MAX_VALUE - 1 ) {
		Error( "ParseEpair: token %s too long", token.string );
	}
	e->value = copystring( token.string );

	// strip trailing spaces
	StripTrailing( e->key );
	StripTrailing( e->value );

	return e;
} //end of the function ParseEpair


/*
================
ParseEntity
================
*/
qboolean    ParseEntity( script_t *script ) {
	epair_t *e;
	entity_t    *mapent;
	token_t token;

	if ( !PS_ReadToken( script, &token ) ) {
		return false;
	}

	if ( strcmp( token.string, "{" ) ) {
		Error( "ParseEntity: { not found" );
	}

	if ( num_entities == MAX_MAP_ENTITIES ) {
		Error( "num_entities == MAX_MAP_ENTITIES" );
	}

	mapent = &entities[num_entities];
	num_entities++;

	do
	{
		if ( !PS_ReadToken( script, &token ) ) {
			Error( "ParseEntity: EOF without closing brace" );
		}
		if ( !strcmp( token.string, "}" ) ) {
			break;
		}
		PS_UnreadLastToken( script );
		e = ParseEpair( script );
		e->next = mapent->epairs;
		mapent->epairs = e;
	} while ( 1 );

	return true;
} //end of the function ParseEntity

void PrintEntity( entity_t *ent ) {
	epair_t *ep;

	printf( "------- entity %p -------\n", ent );
	for ( ep = ent->epairs ; ep ; ep = ep->next )
	{
		printf( "%s = %s\n", ep->key, ep->value );
	}

}

void    SetKeyValue( entity_t *ent, char *key, char *value ) {
	epair_t *ep;

	for ( ep = ent->epairs ; ep ; ep = ep->next )
		if ( !strcmp( ep->key, key ) ) {
			FreeMemory( ep->value );
			ep->value = copystring( value );
			return;
		}
	ep = GetMemory( sizeof( *ep ) );
	ep->next = ent->epairs;
	ent->epairs = ep;
	ep->key = copystring( key );
	ep->value = copystring( value );
}

char    *ValueForKey( entity_t *ent, char *key ) {
	epair_t *ep;

	for ( ep = ent->epairs ; ep ; ep = ep->next )
		if ( !strcmp( ep->key, key ) ) {
			return ep->value;
		}
	return "";
}

vec_t   FloatForKey( entity_t *ent, char *key ) {
	char    *k;

	k = ValueForKey( ent, key );
	return atof( k );
}

void    GetVectorForKey( entity_t *ent, char *key, vec3_t vec ) {
	char    *k;
	double v1, v2, v3;

	k = ValueForKey( ent, key );
// scanf into doubles, then assign, so it is vec_t size independent
	v1 = v2 = v3 = 0;
	sscanf( k, "%lf %lf %lf", &v1, &v2, &v3 );
	vec[0] = v1;
	vec[1] = v2;
	vec[2] = v3;
}