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

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

This file is part of the Return to Castle Wolfenstein multiplayer GPL Source Code (“RTCW MP Source Code”).  

RTCW MP 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 MP 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 MP Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the RTCW MP 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 MP 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:		be_ai_goal.c
 *
 * desc:		goal AI
 *
 *
 *****************************************************************************/

#include "../qcommon/q_shared.h"
#include "l_utils.h"
#include "l_libvar.h"
#include "l_memory.h"
#include "l_log.h"
#include "l_script.h"
#include "l_precomp.h"
#include "l_struct.h"
#include "aasfile.h"
#include "botlib.h"
#include "be_aas.h"
#include "be_aas_funcs.h"
#include "be_interface.h"
#include "be_ai_weight.h"
#include "be_ai_goal.h"
#include "be_ai_move.h"

//#define DEBUG_AI_GOAL
#ifdef RANDOMIZE
#define UNDECIDEDFUZZY
#endif //RANDOMIZE
#define DROPPEDWEIGHT
//avoid goal time
#define AVOID_TIME              30
//avoid dropped goal time
#define AVOIDDROPPED_TIME       5
//
#define TRAVELTIME_SCALE        0.01

//location in the map "target_location"
typedef struct maplocation_s
{
	vec3_t origin;
	int areanum;
	char name[MAX_EPAIRKEY];
	struct maplocation_s *next;
} maplocation_t;

//camp spots "info_camp"
typedef struct campspot_s
{
	vec3_t origin;
	int areanum;
	char name[MAX_EPAIRKEY];
	float range;
	float weight;
	float wait;
	float random;
	struct campspot_s *next;
} campspot_t;

//FIXME: these are game specific
typedef enum {
	GT_FFA,             // free for all
	GT_TOURNAMENT,      // one on one tournament
	GT_SINGLE_PLAYER,   // single player tournament

	//-- team games go after this --

	GT_TEAM,            // team deathmatch
	GT_CTF,             // capture the flag

	GT_MAX_GAME_TYPE
} gametype_t;

// Rafael gameskill
typedef enum {
	GSKILL_EASY,
	GSKILL_MEDIUM,
	GSKILL_MEDIUMHARD, // normal default level
	GSKILL_HARD
} gameskill_t;

typedef struct levelitem_s
{
	int number;                         //number of the level item
	int iteminfo;                       //index into the item info
	int notteam;                        //true if not in teamplay
	int notfree;                        //true if not in ffa
	int notsingle;                      //true if not in single
	vec3_t origin;                      //origin of the item
	int goalareanum;                    //area the item is in
	vec3_t goalorigin;                  //goal origin within the area
	int entitynum;                      //entity number
	float timeout;                      //item is removed after this time
	struct levelitem_s *prev, *next;
} levelitem_t;

typedef struct iteminfo_s
{
	char classname[32];                 //classname of the item
	char name[MAX_STRINGFIELD];         //name of the item
	char model[MAX_STRINGFIELD];        //model of the item
	int modelindex;                     //model index
	int type;                           //item type
	int index;                          //index in the inventory
	float respawntime;                  //respawn time
	vec3_t mins;                        //mins of the item
	vec3_t maxs;                        //maxs of the item
	int number;                         //number of the item info
} iteminfo_t;

#define ITEMINFO_OFS(x)	(size_t)&(((iteminfo_t *)0)->x)

fielddef_t iteminfo_fields[] =
{
	{"name", ITEMINFO_OFS( name ), FT_STRING},
	{"model", ITEMINFO_OFS( model ), FT_STRING},
	{"modelindex", ITEMINFO_OFS( modelindex ), FT_INT},
	{"type", ITEMINFO_OFS( type ), FT_INT},
	{"index", ITEMINFO_OFS( index ), FT_INT},
	{"respawntime", ITEMINFO_OFS( respawntime ), FT_FLOAT},
	{"mins", ITEMINFO_OFS( mins ), FT_FLOAT | FT_ARRAY, 3},
	{"maxs", ITEMINFO_OFS( maxs ), FT_FLOAT | FT_ARRAY, 3},
	{0, 0, 0}
};

structdef_t iteminfo_struct =
{
	sizeof( iteminfo_t ), iteminfo_fields
};

typedef struct itemconfig_s
{
	int numiteminfo;
	iteminfo_t *iteminfo;
} itemconfig_t;

//goal state
typedef struct bot_goalstate_s
{
	struct weightconfig_s *itemweightconfig;    //weight config
	int *itemweightindex;                       //index from item to weight
	//
	int client;                                 //client using this goal state
	int lastreachabilityarea;                   //last area with reachabilities the bot was in
	//
	bot_goal_t goalstack[MAX_GOALSTACK];        //goal stack
	int goalstacktop;                           //the top of the goal stack
	//
	int avoidgoals[MAX_AVOIDGOALS];             //goals to avoid
	float avoidgoaltimes[MAX_AVOIDGOALS];       //times to avoid the goals
} bot_goalstate_t;

bot_goalstate_t *botgoalstates[MAX_CLIENTS + 1];
//item configuration
itemconfig_t *itemconfig = NULL;
//level items
levelitem_t *levelitemheap = NULL;
levelitem_t *freelevelitems = NULL;
levelitem_t *levelitems = NULL;
int numlevelitems = 0;
//map locations
maplocation_t *maplocations = NULL;
//camp spots
campspot_t *campspots = NULL;
//the game type
int g_gametype;

// Rafael gameskill
int g_gameskill;
// done

//========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//========================================================================
bot_goalstate_t *BotGoalStateFromHandle( int handle ) {
	if ( handle <= 0 || handle > MAX_CLIENTS ) {
		botimport.Print( PRT_FATAL, "goal state handle %d out of range\n", handle );
		return NULL;
	} //end if
	if ( !botgoalstates[handle] ) {
		botimport.Print( PRT_FATAL, "invalid goal state %d\n", handle );
		return NULL;
	} //end if
	return botgoalstates[handle];
} //end of the function BotGoalStateFromHandle
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotInterbreedGoalFuzzyLogic( int parent1, int parent2, int child ) {
	bot_goalstate_t *p1, *p2, *c;

	p1 = BotGoalStateFromHandle( parent1 );
	p2 = BotGoalStateFromHandle( parent2 );
	c = BotGoalStateFromHandle( child );

	if (!p1 || !p2 || !c)
		return;

	InterbreedWeightConfigs( p1->itemweightconfig, p2->itemweightconfig,
							 c->itemweightconfig );
} //end of the function BotInterbreedingGoalFuzzyLogic
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotSaveGoalFuzzyLogic( int goalstate, char *filename ) {
	//bot_goalstate_t *gs;

	//gs = BotGoalStateFromHandle( goalstate );

	//if (!gs) return;
	//WriteWeightConfig(filename, gs->itemweightconfig);
} //end of the function BotSaveGoalFuzzyLogic
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotMutateGoalFuzzyLogic( int goalstate, float range ) {
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );

	if (!gs) return;
	EvolveWeightConfig( gs->itemweightconfig );
} //end of the function BotMutateGoalFuzzyLogic
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
itemconfig_t *LoadItemConfig( char *filename ) {
	int max_iteminfo;
	token_t token;
	char path[MAX_QPATH];
	source_t *source;
	itemconfig_t *ic;
	iteminfo_t *ii;

	max_iteminfo = (int) LibVarValue( "max_iteminfo", "256" );
	if ( max_iteminfo < 0 ) {
		botimport.Print( PRT_ERROR, "max_iteminfo = %d\n", max_iteminfo );
		max_iteminfo = 128;
		LibVarSet( "max_iteminfo", "128" );
	}

	Q_strncpyz( path, filename, sizeof( path ) );
	source = LoadSourceFile( path );
	if ( !source ) {
		botimport.Print( PRT_ERROR, "counldn't load %s\n", path );
		return NULL;
	} //end if
	  //initialize item config
	ic = (itemconfig_t *) GetClearedHunkMemory( sizeof( itemconfig_t ) +
												max_iteminfo * sizeof( iteminfo_t ) );
	ic->iteminfo = ( iteminfo_t * )( (char *) ic + sizeof( itemconfig_t ) );
	ic->numiteminfo = 0;
	//parse the item config file
	while ( PC_ReadToken( source, &token ) )
	{
		if ( !strcmp( token.string, "iteminfo" ) ) {
			if ( ic->numiteminfo >= max_iteminfo ) {
				SourceError( source, "more than %d item info defined", max_iteminfo );
				FreeMemory( ic );
				FreeSource( source );
				return NULL;
			} //end if
			ii = &ic->iteminfo[ic->numiteminfo];
			memset( ii, 0, sizeof( iteminfo_t ) );
			if ( !PC_ExpectTokenType( source, TT_STRING, 0, &token ) ) {
				FreeMemory( ic );
				FreeSource( source );
				return NULL;
			} //end if
			StripDoubleQuotes( token.string );
			Q_strncpyz( ii->classname, token.string, sizeof( ii->classname ) );
			if ( !ReadStructure( source, &iteminfo_struct, (char *) ii ) ) {
				FreeMemory( ic );
				FreeSource( source );
				return NULL;
			} //end if
			ii->number = ic->numiteminfo;
			ic->numiteminfo++;
		} //end if
		else
		{
			SourceError( source, "unknown definition %s", token.string );
			FreeMemory( ic );
			FreeSource( source );
			return NULL;
		} //end else
	} //end while
	FreeSource( source );
	//
	if ( !ic->numiteminfo ) {
		botimport.Print( PRT_WARNING, "no item info loaded\n" );
	}
	botimport.Print( PRT_MESSAGE, "loaded %s\n", path );
	return ic;
} //end of the function LoadItemConfig
//===========================================================================
// index to find the weight function of an iteminfo
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
int *ItemWeightIndex( weightconfig_t *iwc, itemconfig_t *ic ) {
	int *index, i;

	//initialize item weight index
	index = (int *) GetClearedMemory( sizeof( int ) * ic->numiteminfo );

	for ( i = 0; i < ic->numiteminfo; i++ )
	{
		index[i] = FindFuzzyWeight( iwc, ic->iteminfo[i].classname );
		if ( index[i] < 0 ) {
			Log_Write( "item info %d \"%s\" has no fuzzy weight\r\n", i, ic->iteminfo[i].classname );
		} //end if
	} //end for
	return index;
} //end of the function ItemWeightIndex
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void InitLevelItemHeap( void ) {
	int i, max_levelitems;

	if ( levelitemheap ) {
		FreeMemory( levelitemheap );
	}

	max_levelitems = (int) LibVarValue( "max_levelitems", "256" );
	levelitemheap = (levelitem_t *) GetMemory( max_levelitems * sizeof( levelitem_t ) );

	for ( i = 0; i < max_levelitems - 2; i++ )
	{
		levelitemheap[i].next = &levelitemheap[i + 1];
	} //end for
	levelitemheap[max_levelitems - 1].next = NULL;
	//
	freelevelitems = levelitemheap;
} //end of the function InitLevelItemHeap
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
levelitem_t *AllocLevelItem( void ) {
	levelitem_t *li;

	li = freelevelitems;
	if ( !li ) {
		botimport.Print( PRT_FATAL, "out of level items\n" );
		return NULL;
	} //end if
	  //
	freelevelitems = freelevelitems->next;
	memset( li, 0, sizeof( levelitem_t ) );
	return li;
} //end of the function AllocLevelItem
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void FreeLevelItem( levelitem_t *li ) {
	li->next = freelevelitems;
	freelevelitems = li;
} //end of the function FreeLevelItem
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void AddLevelItemToList( levelitem_t *li ) {
	if ( levelitems ) {
		levelitems->prev = li;
	}
	li->prev = NULL;
	li->next = levelitems;
	levelitems = li;
} //end of the function AddLevelItemToList
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void RemoveLevelItemFromList( levelitem_t *li ) {
	if ( li->prev ) {
		li->prev->next = li->next;
	} else { levelitems = li->next;}
	if ( li->next ) {
		li->next->prev = li->prev;
	}
} //end of the function RemoveLevelItemFromList
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void BotFreeInfoEntities( void ) {
	maplocation_t *ml, *nextml;
	campspot_t *cs, *nextcs;

	for ( ml = maplocations; ml; ml = nextml )
	{
		nextml = ml->next;
		FreeMemory( ml );
	} //end for
	maplocations = NULL;
	for ( cs = campspots; cs; cs = nextcs )
	{
		nextcs = cs->next;
		FreeMemory( cs );
	} //end for
	campspots = NULL;
} //end of the function BotFreeInfoEntities
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void BotInitInfoEntities( void ) {
	char classname[MAX_EPAIRKEY];
	maplocation_t *ml;
	campspot_t *cs;
	int ent, numlocations, numcampspots;

	BotFreeInfoEntities();
	//
	numlocations = 0;
	numcampspots = 0;
	for ( ent = AAS_NextBSPEntity( 0 ); ent; ent = AAS_NextBSPEntity( ent ) )
	{
		if ( !AAS_ValueForBSPEpairKey( ent, "classname", classname, MAX_EPAIRKEY ) ) {
			continue;
		}

		//map locations
		if ( !strcmp( classname, "target_location" ) ) {
			ml = (maplocation_t *) GetClearedMemory( sizeof( maplocation_t ) );
			AAS_VectorForBSPEpairKey( ent, "origin", ml->origin );
			AAS_ValueForBSPEpairKey( ent, "message", ml->name, sizeof( ml->name ) );
			ml->areanum = AAS_PointAreaNum( ml->origin );
			ml->next = maplocations;
			maplocations = ml;
			numlocations++;
		} //end if
		  //camp spots
		else if ( !strcmp( classname, "info_camp" ) ) {
			cs = (campspot_t *) GetClearedMemory( sizeof( campspot_t ) );
			AAS_VectorForBSPEpairKey( ent, "origin", cs->origin );
			//cs->origin[2] += 16;
			AAS_ValueForBSPEpairKey( ent, "message", cs->name, sizeof( cs->name ) );
			AAS_FloatForBSPEpairKey( ent, "range", &cs->range );
			AAS_FloatForBSPEpairKey( ent, "weight", &cs->weight );
			AAS_FloatForBSPEpairKey( ent, "wait", &cs->wait );
			AAS_FloatForBSPEpairKey( ent, "random", &cs->random );
			cs->areanum = AAS_PointAreaNum( cs->origin );
			if ( !cs->areanum ) {
				botimport.Print( PRT_MESSAGE, "camp spot at %1.1f %1.1f %1.1f in solid\n", cs->origin[0], cs->origin[1], cs->origin[2] );
				FreeMemory( cs );
				continue;
			} //end if
			cs->next = campspots;
			campspots = cs;
			//AAS_DrawPermanentCross(cs->origin, 4, LINECOLOR_YELLOW);
			numcampspots++;
		} //end else if
	} //end for
	if ( botDeveloper ) {
		botimport.Print( PRT_MESSAGE, "%d map locations\n", numlocations );
		botimport.Print( PRT_MESSAGE, "%d camp spots\n", numcampspots );
	} //end if
} //end of the function BotInitInfoEntities
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void BotInitLevelItems( void ) {
	int i, spawnflags;
	char classname[MAX_EPAIRKEY];
	vec3_t origin;
	int ent;
	itemconfig_t *ic;
	levelitem_t *li;

	//initialize the map locations and camp spots
	BotInitInfoEntities();

	//initialize the level item heap
	InitLevelItemHeap();
	levelitems = NULL;
	numlevelitems = 0;
	//
	ic = itemconfig;
	if ( !ic ) {
		return;
	}

	//if there's no AAS file loaded
	if ( !AAS_Loaded() ) {
		return;
	}

	//update the modelindexes of the item info
	for ( i = 0; i < ic->numiteminfo; i++ )
	{
		//ic->iteminfo[i].modelindex = AAS_IndexFromModel(ic->iteminfo[i].model);
		if ( !ic->iteminfo[i].modelindex ) {
			Log_Write( "item %s has modelindex 0", ic->iteminfo[i].classname );
		} //end if
	} //end for

	for ( ent = AAS_NextBSPEntity( 0 ); ent; ent = AAS_NextBSPEntity( ent ) )
	{
		if ( !AAS_ValueForBSPEpairKey( ent, "classname", classname, MAX_EPAIRKEY ) ) {
			continue;
		}
		//
		spawnflags = 0;
		AAS_IntForBSPEpairKey( ent, "spawnflags", &spawnflags );
		//FIXME: don't do this
		// for now skip all floating entities
		if ( spawnflags & 1 ) {
			continue;
		}
		//
		for ( i = 0; i < ic->numiteminfo; i++ )
		{
			if ( !strcmp( classname, ic->iteminfo[i].classname ) ) {
				//get the origin of the item
				if ( AAS_VectorForBSPEpairKey( ent, "origin", origin ) ) {
					li = AllocLevelItem();
					if ( !li ) {
						return;
					}
					//
					li->number = ++numlevelitems;
					li->timeout = 0;
					li->entitynum = 0;
					//
					AAS_IntForBSPEpairKey( ent, "notfree", &li->notfree );
					AAS_IntForBSPEpairKey( ent, "notteam", &li->notteam );
					AAS_IntForBSPEpairKey( ent, "notsingle", &li->notsingle );
					//if not a stationary item
					if ( !( spawnflags & 1 ) ) {
						if ( !AAS_DropToFloor( origin, ic->iteminfo[i].mins, ic->iteminfo[i].maxs ) ) {
							botimport.Print( PRT_MESSAGE, "%s in solid at (%1.1f %1.1f %1.1f)\n",
											 classname, origin[0], origin[1], origin[2] );
						} //end if
					} //end if
					  //item info of the level item
					li->iteminfo = i;
					//origin of the item
					VectorCopy( origin, li->origin );
					//get the item goal area and goal origin
					li->goalareanum = AAS_BestReachableArea( origin,
															 ic->iteminfo[i].mins, ic->iteminfo[i].maxs,
															 li->goalorigin );
					//
					AddLevelItemToList( li );
				} //end if
				else
				{
					botimport.Print( PRT_ERROR, "item %s without origin\n", classname );
				} //end else
				break;
			} //end if
		} //end for
		if ( i >= ic->numiteminfo ) {
			Log_Write( "entity %s unknown item\r\n", classname );
		} //end if
	} //end for
	botimport.Print( PRT_MESSAGE, "found %d level items\n", numlevelitems );
} //end of the function BotInitLevelItems
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotGoalName( int number, char *name, int size ) {
	levelitem_t *li;

	if ( !itemconfig ) {
		return;
	}
	//
	for ( li = levelitems; li; li = li->next )
	{
		if ( li->number == number ) {
			strncpy( name, itemconfig->iteminfo[li->iteminfo].name, size - 1 );
			name[size - 1] = '\0';
			return;
		} //end for
	} //end for
	strcpy( name, "" );
} //end of the function BotGoalName
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotResetAvoidGoals( int goalstate ) {
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return;
	}
	memset( gs->avoidgoals, 0, MAX_AVOIDGOALS * sizeof( int ) );
	memset( gs->avoidgoaltimes, 0, MAX_AVOIDGOALS * sizeof( float ) );
} //end of the function BotResetAvoidGoals
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotDumpAvoidGoals( int goalstate ) {
	int i;
	bot_goalstate_t *gs;
	char name[32];

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return;
	}
	for ( i = 0; i < MAX_AVOIDGOALS; i++ )
	{
		if ( gs->avoidgoaltimes[i] >= AAS_Time() ) {
			BotGoalName( gs->avoidgoals[i], name, 32 );
			Log_Write( "avoid goal %s, number %d for %f seconds", name,
					   gs->avoidgoals[i], gs->avoidgoaltimes[i] - AAS_Time() );
		} //end if
	} //end for
} //end of the function BotDumpAvoidGoals
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotAddToAvoidGoals( bot_goalstate_t *gs, int number, float avoidtime ) {
	int i;

	for ( i = 0; i < MAX_AVOIDGOALS; i++ )
	{
		//if this avoid goal has expired
		if ( gs->avoidgoaltimes[i] < AAS_Time() ) {
			gs->avoidgoals[i] = number;
			gs->avoidgoaltimes[i] = AAS_Time() + avoidtime;
			return;
		} //end if
	} //end for
} //end of the function BotAddToAvoidGoals
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void BotRemoveFromAvoidGoals( int goalstate, int number ) {
	int i;
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return;
	}
	//don't use the goals the bot wants to avoid
	for ( i = 0; i < MAX_AVOIDGOALS; i++ )
	{
		if ( gs->avoidgoals[i] == number && gs->avoidgoaltimes[i] >= AAS_Time() ) {
			gs->avoidgoaltimes[i] = 0;
			return;
		} //end if
	} //end for
} //end of the function BotRemoveFromAvoidGoals
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
float BotAvoidGoalTime( int goalstate, int number ) {
	int i;
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return 0;
	}
	//don't use the goals the bot wants to avoid
	for ( i = 0; i < MAX_AVOIDGOALS; i++ )
	{
		if ( gs->avoidgoals[i] == number && gs->avoidgoaltimes[i] >= AAS_Time() ) {
			return gs->avoidgoaltimes[i] - AAS_Time();
		} //end if
	} //end for
	return 0;
} //end of the function BotAvoidGoalTime
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int BotGetLevelItemGoal( int index, char *name, bot_goal_t *goal ) {
	levelitem_t *li;

	if ( !itemconfig ) {
		return -1;
	}
	for ( li = levelitems; li; li = li->next )
	{
		if ( li->number <= index ) {
			continue;
		}
		//
		if ( g_gametype == GT_SINGLE_PLAYER ) {
			if ( li->notsingle ) {
				continue;
			}
		} else if ( g_gametype >= GT_TEAM )     {
			if ( li->notteam ) {
				continue;
			}
		} else {
			if ( li->notfree ) {
				continue;
			}
		}
		//
		if ( !Q_stricmp( name, itemconfig->iteminfo[li->iteminfo].name ) ) {
			goal->areanum = li->goalareanum;
			VectorCopy( li->goalorigin, goal->origin );
			goal->entitynum = li->entitynum;
			VectorCopy( itemconfig->iteminfo[li->iteminfo].mins, goal->mins );
			VectorCopy( itemconfig->iteminfo[li->iteminfo].maxs, goal->maxs );
			goal->number = li->number;
			goal->iteminfo = li->iteminfo;
			//botimport.Print(PRT_MESSAGE, "found li %s\n", itemconfig->iteminfo[li->iteminfo].name);
			return li->number;
		} //end if
	} //end for
	return -1;
} //end of the function BotGetLevelItemGoal
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int BotGetMapLocationGoal( char *name, bot_goal_t *goal ) {
	maplocation_t *ml;
	vec3_t mins = {-8, -8, -8}, maxs = {8, 8, 8};

	for ( ml = maplocations; ml; ml = ml->next )
	{
		if ( !Q_stricmp( ml->name, name ) ) {
			goal->areanum = ml->areanum;
			VectorCopy( ml->origin, goal->origin );
			goal->entitynum = 0;
			VectorCopy( mins, goal->mins );
			VectorCopy( maxs, goal->maxs );
			goal->number = 0;
			goal->flags = 0;
			goal->iteminfo = 0;
			return qtrue;
		} //end if
	} //end for
	return qfalse;
} //end of the function BotGetMapLocationGoal
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
int BotGetNextCampSpotGoal( int num, bot_goal_t *goal ) {
	int i;
	campspot_t *cs;
	vec3_t mins = {-8, -8, -8}, maxs = {8, 8, 8};

	if ( num < 0 ) {
		num = 0;
	}
	i = num;
	for ( cs = campspots; cs; cs = cs->next )
	{
		if ( --i < 0 ) {
			goal->areanum = cs->areanum;
			VectorCopy( cs->origin, goal->origin );
			goal->entitynum = 0;
			VectorCopy( mins, goal->mins );
			VectorCopy( maxs, goal->maxs );
			goal->number = 0;
			goal->flags = 0;
			goal->iteminfo = 0;
			return num + 1;
		} //end if
	} //end for
	return 0;
} //end of the function BotGetNextCampSpotGoal
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================

//NOTE: enum entityType_t in bg_public.h
#define ET_ITEM         2

void BotUpdateEntityItems( void ) {
	int ent, i, modelindex;
	vec3_t dir;
	levelitem_t *li, *nextli;
	aas_entityinfo_t entinfo;
	itemconfig_t *ic;

	//timeout current entity items if necessary
	for ( li = levelitems; li; li = nextli )
	{
		nextli = li->next;
		//if it is an item that will time out
		if ( li->timeout ) {
			//timeout the item
			if ( li->timeout < AAS_Time() ) {
				RemoveLevelItemFromList( li );
				FreeLevelItem( li );
			} //end if
		} //end if
	} //end for
	  //find new entity items
	ic = itemconfig;
	if ( !itemconfig ) {
		return;
	}
	//
	for ( ent = AAS_NextEntity( 0 ); ent; ent = AAS_NextEntity( ent ) )
	{
		if ( AAS_EntityType( ent ) != ET_ITEM ) {
			continue;
		}
		//get the model index of the entity
		modelindex = AAS_EntityModelindex( ent );
		//
		if ( !modelindex ) {
			continue;
		}
		//get info about the entity
		AAS_EntityInfo( ent, &entinfo );
		//FIXME: don't do this
		//skip all floating items for now
		if ( entinfo.groundent != ENTITYNUM_WORLD ) {
			continue;
		}
		//if the entity is still moving
		if ( entinfo.origin[0] != entinfo.lastvisorigin[0] ||
			 entinfo.origin[1] != entinfo.lastvisorigin[1] ||
			 entinfo.origin[2] != entinfo.lastvisorigin[2] ) {
			continue;
		}
		//check if the level item isn't already stored
		for ( li = levelitems; li; li = li->next )
		{
			//if the model of the level item and the entity are different
			if ( ic->iteminfo[li->iteminfo].modelindex != modelindex ) {
				continue;
			}
			//if the level item is linked to an entity
			if ( li->entitynum ) {
				if ( li->entitynum == ent ) {
					VectorCopy( entinfo.origin, li->origin );
					break;
				} //end if
			} //end if
			else
			{
				//check if the entity is very close
				VectorSubtract( li->origin, entinfo.origin, dir );
				if ( VectorLength( dir ) < 30 ) {
					//found an entity for this level item
					li->entitynum = ent;
					//keep updating the entity origin
					VectorCopy( entinfo.origin, li->origin );
					//also update the goal area number
					li->goalareanum = AAS_BestReachableArea( li->origin,
															 ic->iteminfo[li->iteminfo].mins, ic->iteminfo[li->iteminfo].maxs,
															 li->goalorigin );
					//Log_Write("found item %s entity", ic->iteminfo[li->iteminfo].classname);
					break;
				} //end if
				  //else botimport.Print(PRT_MESSAGE, "item %s has no attached entity\n",
				  //						ic->iteminfo[li->iteminfo].name);
			} //end else
		} //end for
		if ( li ) {
			continue;
		}
		//check if the model is from a known item
		for ( i = 0; i < ic->numiteminfo; i++ )
		{
			if ( ic->iteminfo[i].modelindex == modelindex ) {
				break;
			} //end if
		} //end for
		  //if the model is not from a known item
		if ( i >= ic->numiteminfo ) {
			continue;
		}
		//allocate a new level item
		li = AllocLevelItem();
		//
		if ( !li ) {
			continue;
		}
		//entity number of the level item
		li->entitynum = ent;
		//number for the level item
		li->number = numlevelitems + ent;
		//set the item info index for the level item
		li->iteminfo = i;
		//origin of the item
		VectorCopy( entinfo.origin, li->origin );
		//get the item goal area and goal origin
		li->goalareanum = AAS_BestReachableArea( li->origin,
												 ic->iteminfo[i].mins, ic->iteminfo[i].maxs,
												 li->goalorigin );
		//
		if ( AAS_AreaJumpPad( li->goalareanum ) ) {
			FreeLevelItem( li );
			continue;
		} //end if
		  //time this item out after 30 seconds
		  //dropped items disappear after 30 seconds
		li->timeout = AAS_Time() + 30;
		//add the level item to the list
		AddLevelItemToList( li );
		//botimport.Print(PRT_MESSAGE, "found new level item %s\n", ic->iteminfo[i].classname);
	} //end for
} //end of the function BotUpdateEntityItems
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotDumpGoalStack( int goalstate ) {
	int i;
	bot_goalstate_t *gs;
	char name[32];

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return;
	}
	for ( i = 1; i <= gs->goalstacktop; i++ )
	{
		BotGoalName( gs->goalstack[i].number, name, 32 );
		Log_Write( "%d: %s", i, name );
	} //end for
} //end of the function BotDumpGoalStack
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotPushGoal( int goalstate, bot_goal_t *goal ) {
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return;
	}
	if ( gs->goalstacktop >= MAX_GOALSTACK - 1 ) {
		botimport.Print( PRT_ERROR, "goal heap overflow\n" );
		BotDumpGoalStack( goalstate );
		return;
	} //end if
	gs->goalstacktop++;
	memcpy( &gs->goalstack[gs->goalstacktop], goal, sizeof( bot_goal_t ) );
} //end of the function BotPushGoal
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotPopGoal( int goalstate ) {
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return;
	}
	if ( gs->goalstacktop > 0 ) {
		gs->goalstacktop--;
	}
} //end of the function BotPopGoal
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotEmptyGoalStack( int goalstate ) {
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return;
	}
	gs->goalstacktop = 0;
} //end of the function BotEmptyGoalStack
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
int BotGetTopGoal( int goalstate, bot_goal_t *goal ) {
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return qfalse;
	}
	if ( !gs->goalstacktop ) {
		return qfalse;
	}
	memcpy( goal, &gs->goalstack[gs->goalstacktop], sizeof( bot_goal_t ) );
	return qtrue;
} //end of the function BotGetTopGoal
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
int BotGetSecondGoal( int goalstate, bot_goal_t *goal ) {
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return qfalse;
	}
	if ( gs->goalstacktop <= 1 ) {
		return qfalse;
	}
	memcpy( goal, &gs->goalstack[gs->goalstacktop - 1], sizeof( bot_goal_t ) );
	return qtrue;
} //end of the function BotGetSecondGoal
//===========================================================================
// pops a new long term goal on the goal stack in the goalstate
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
int BotChooseLTGItem( int goalstate, vec3_t origin, int *inventory, int travelflags ) {
	int areanum, t, weightnum;
	float weight, bestweight, avoidtime;
	iteminfo_t *iteminfo;
	itemconfig_t *ic;
	levelitem_t *li, *bestitem;
	bot_goal_t goal;
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return qfalse;
	}
	if ( !gs->itemweightconfig ) {
		return qfalse;
	}
	//get the area the bot is in
	areanum = BotReachabilityArea( origin, gs->client );
	//if the bot is in solid or if the area the bot is in has no reachability links
	if ( !areanum || !AAS_AreaReachability( areanum ) ) {
		//use the last valid area the bot was in
		areanum = gs->lastreachabilityarea;
	} //end if
	  //remember the last area with reachabilities the bot was in
	gs->lastreachabilityarea = areanum;
	//if still in solid
	if ( !areanum ) {
		return qfalse;
	}
	//the item configuration
	ic = itemconfig;
	if ( !itemconfig ) {
		return qfalse;
	}
	//best weight and item so far
	bestweight = 0;
	bestitem = NULL;
	memset( &goal, 0, sizeof( bot_goal_t ) );
	//go through the items in the level
	for ( li = levelitems; li; li = li->next )
	{
		if ( g_gametype == GT_SINGLE_PLAYER ) {
			if ( li->notsingle ) {
				continue;
			}
		} else if ( g_gametype >= GT_TEAM )     {
			if ( li->notteam ) {
				continue;
			}
		} else {
			if ( li->notfree ) {
				continue;
			}
		}
		//if the item is not in a possible goal area
		if ( !li->goalareanum ) {
			continue;
		}
		//get the fuzzy weight function for this item
		iteminfo = &ic->iteminfo[li->iteminfo];
		weightnum = gs->itemweightindex[iteminfo->number];
		if ( weightnum < 0 ) {
			continue;
		}
		//if this goal is in the avoid goals
		if ( BotAvoidGoalTime( goalstate, li->number ) > 0 ) {
			continue;
		}

#ifdef UNDECIDEDFUZZY
		weight = FuzzyWeightUndecided( inventory, gs->itemweightconfig, weightnum );
#else
		weight = FuzzyWeight( inventory, gs->itemweightconfig, weightnum );
#endif //UNDECIDEDFUZZY
#ifdef DROPPEDWEIGHT
		//HACK: to make dropped items more attractive
		if ( li->timeout ) {
			weight += 1000;
		}
#endif //DROPPEDWEIGHT
		if ( weight > 0 ) {
			//get the travel time towards the goal area
			t = AAS_AreaTravelTimeToGoalArea( areanum, origin, li->goalareanum, travelflags );
			//if the goal is reachable
			if ( t > 0 ) {
				weight /= (float) t * TRAVELTIME_SCALE;
				//
				if ( weight > bestweight ) {
					bestweight = weight;
					bestitem = li;
				} //end if
			} //end if
		} //end if
	} //end for
	  //if no goal item found
	if ( !bestitem ) {
		/*
		//if not in lava or slime
		if (!AAS_AreaLava(areanum) && !AAS_AreaSlime(areanum))
		{
			if (AAS_RandomGoalArea(areanum, travelflags, &goal.areanum, goal.origin))
			{
				VectorSet(goal.mins, -15, -15, -15);
				VectorSet(goal.maxs, 15, 15, 15);
				goal.entitynum = 0;
				goal.number = 0;
				goal.flags = GFL_ROAM;
				goal.iteminfo = 0;
				//push the goal on the stack
				BotPushGoal(goalstate, &goal);
				//
#ifdef DEBUG
				botimport.Print(PRT_MESSAGE, "chosen roam goal area %d\n", goal.areanum);
#endif //DEBUG
				return qtrue;
			} //end if
		} //end if
		*/
		return qfalse;
	} //end if
	  //create a bot goal for this item
	iteminfo = &ic->iteminfo[bestitem->iteminfo];
	VectorCopy( bestitem->goalorigin, goal.origin );
	VectorCopy( iteminfo->mins, goal.mins );
	VectorCopy( iteminfo->maxs, goal.maxs );
	goal.areanum = bestitem->goalareanum;
	goal.entitynum = bestitem->entitynum;
	goal.number = bestitem->number;
	goal.flags = GFL_ITEM;
	goal.iteminfo = bestitem->iteminfo;
	//add the chosen goal to the goals to avoid for a while
	avoidtime = iteminfo->respawntime * 0.5;
	if ( avoidtime < 10 ) {
		avoidtime = AVOID_TIME;
	}
	//if it's a dropped item
	if ( bestitem->timeout ) {
		avoidtime = AVOIDDROPPED_TIME;
	}
	BotAddToAvoidGoals( gs, bestitem->number, avoidtime );
	//push the goal on the stack
	BotPushGoal( goalstate, &goal );
	//
#ifdef DEBUG_AI_GOAL
	if ( bestitem->timeout ) {
		botimport.Print( PRT_MESSAGE, "new ltg dropped item %s\n", ic->iteminfo[bestitem->iteminfo].classname );
	} //end if
	iteminfo = &ic->iteminfo[bestitem->iteminfo];
	botimport.Print( PRT_MESSAGE, "new ltg \"%s\"\n", iteminfo->classname );
#endif //DEBUG_AI_GOAL
	return qtrue;
} //end of the function BotChooseLTGItem
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
int BotChooseNBGItem( int goalstate, vec3_t origin, int *inventory, int travelflags,
					  bot_goal_t *ltg, float maxtime ) {
	int areanum, t, weightnum, ltg_time;
	float weight, bestweight, avoidtime;
	iteminfo_t *iteminfo;
	itemconfig_t *ic;
	levelitem_t *li, *bestitem;
	bot_goal_t goal;
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return qfalse;
	}
	if ( !gs->itemweightconfig ) {
		return qfalse;
	}
	//get the area the bot is in
	areanum = BotReachabilityArea( origin, gs->client );
	//if the bot is in solid or if the area the bot is in has no reachability links
	if ( !areanum || !AAS_AreaReachability( areanum ) ) {
		//use the last valid area the bot was in
		areanum = gs->lastreachabilityarea;
	} //end if
	  //remember the last area with reachabilities the bot was in
	gs->lastreachabilityarea = areanum;
	//if still in solid
	if ( !areanum ) {
		return qfalse;
	}
	//
	if ( ltg ) {
		ltg_time = AAS_AreaTravelTimeToGoalArea( areanum, origin, ltg->areanum, travelflags );
	} else { ltg_time = 99999;}
	//the item configuration
	ic = itemconfig;
	if ( !itemconfig ) {
		return qfalse;
	}
	//best weight and item so far
	bestweight = 0;
	bestitem = NULL;
	memset( &goal, 0, sizeof( bot_goal_t ) );
	//go through the items in the level
	for ( li = levelitems; li; li = li->next )
	{
		if ( g_gametype == GT_SINGLE_PLAYER ) {
			if ( li->notsingle ) {
				continue;
			}
		} else if ( g_gametype >= GT_TEAM )     {
			if ( li->notteam ) {
				continue;
			}
		} else {
			if ( li->notfree ) {
				continue;
			}
		}
		//if the item is in a possible goal area
		if ( !li->goalareanum ) {
			continue;
		}
		//get the fuzzy weight function for this item
		iteminfo = &ic->iteminfo[li->iteminfo];
		weightnum = gs->itemweightindex[iteminfo->number];
		if ( weightnum < 0 ) {
			continue;
		}
		//if this goal is in the avoid goals
		if ( BotAvoidGoalTime( goalstate, li->number ) > 0 ) {
			continue;
		}
		//
#ifdef UNDECIDEDFUZZY
		weight = FuzzyWeightUndecided( inventory, gs->itemweightconfig, weightnum );
#else
		weight = FuzzyWeight( inventory, gs->itemweightconfig, weightnum );
#endif //UNDECIDEDFUZZY
#ifdef DROPPEDWEIGHT
		//HACK: to make dropped items more attractive
		if ( li->timeout ) {
			weight += 1000;
		}
#endif //DROPPEDWEIGHT
		if ( weight > 0 ) {
			//get the travel time towards the goal area
			t = AAS_AreaTravelTimeToGoalArea( areanum, origin, li->goalareanum, travelflags );
			//if the goal is reachable
			if ( t > 0 && t < maxtime ) {
				weight /= (float) t * TRAVELTIME_SCALE;
				//
				if ( weight > bestweight ) {
					t = 0;
					if ( ltg && !li->timeout ) {
						//get the travel time from the goal to the long term goal
						t = AAS_AreaTravelTimeToGoalArea( li->goalareanum, li->goalorigin, ltg->areanum, travelflags );
					} //end if
					  //if the travel back is possible and doesn't take too long
					if ( t <= ltg_time ) {
						bestweight = weight;
						bestitem = li;
					} //end if
				} //end if
			} //end if
		} //end if
	} //end for
	  //if no goal item found
	if ( !bestitem ) {
		return qfalse;
	}
	//create a bot goal for this item
	iteminfo = &ic->iteminfo[bestitem->iteminfo];
	VectorCopy( bestitem->goalorigin, goal.origin );
	VectorCopy( iteminfo->mins, goal.mins );
	VectorCopy( iteminfo->maxs, goal.maxs );
	goal.areanum = bestitem->goalareanum;
	goal.entitynum = bestitem->entitynum;
	goal.number = bestitem->number;
	goal.flags = GFL_ITEM;
	goal.iteminfo = bestitem->iteminfo;
	//add the chosen goal to the goals to avoid for a while
	avoidtime = iteminfo->respawntime * 0.5;
	if ( avoidtime < 10 ) {
		avoidtime = AVOID_TIME;
	}
	//if it's a dropped item
	if ( bestitem->timeout ) {
		avoidtime = AVOIDDROPPED_TIME;
	}
	BotAddToAvoidGoals( gs, bestitem->number, avoidtime );
	//push the goal on the stack
	BotPushGoal( goalstate, &goal );
	//
#ifdef DEBUG_AI_GOAL
	if ( bestitem->timeout ) {
		botimport.Print( PRT_MESSAGE, "new nbg dropped item %s\n", ic->iteminfo[bestitem->iteminfo].classname );
	} //end if
	iteminfo = &ic->iteminfo[bestitem->iteminfo];
	botimport.Print( PRT_MESSAGE, "new nbg \"%s\"\n", iteminfo->classname );
#endif //DEBUG_AI_GOAL
	return qtrue;
} //end of the function BotChooseNBGItem
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
int BotTouchingGoal( vec3_t origin, bot_goal_t *goal ) {
	int i;
	vec3_t boxmins, boxmaxs;
	vec3_t absmins, absmaxs;
	vec3_t safety_maxs = {0, 0, 0}; //{4, 4, 10};
	vec3_t safety_mins = {0, 0, 0}; //{-4, -4, 0};

	AAS_PresenceTypeBoundingBox( PRESENCE_NORMAL, boxmins, boxmaxs );
	VectorSubtract( goal->mins, boxmaxs, absmins );
	VectorSubtract( goal->maxs, boxmins, absmaxs );
	VectorAdd( absmins, goal->origin, absmins );
	VectorAdd( absmaxs, goal->origin, absmaxs );
	//make the box a little smaller for safety
	VectorSubtract( absmaxs, safety_maxs, absmaxs );
	VectorSubtract( absmins, safety_mins, absmins );

	for ( i = 0; i < 3; i++ )
	{
		if ( origin[i] < absmins[i] || origin[i] > absmaxs[i] ) {
			return qfalse;
		}
	} //end for
	return qtrue;
} //end of the function BotTouchingGoal
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
int BotItemGoalInVisButNotVisible( int viewer, vec3_t eye, vec3_t viewangles, bot_goal_t *goal ) {
	aas_entityinfo_t entinfo;
	bsp_trace_t trace;
	vec3_t middle;

	if ( !( goal->flags & GFL_ITEM ) ) {
		return qfalse;
	}
	//
	VectorAdd( goal->mins, goal->mins, middle );
	VectorScale( middle, 0.5, middle );
	VectorAdd( goal->origin, middle, middle );
	//
	trace = AAS_Trace( eye, NULL, NULL, middle, viewer, CONTENTS_SOLID );
	//if the goal middle point is visible
	if ( trace.fraction >= 1 ) {
		//the goal entity number doesn't have to be valid
		//just assume it's valid
		if ( goal->entitynum <= 0 ) {
			return qfalse;
		}
		//
		//if the entity data isn't valid
		AAS_EntityInfo( goal->entitynum, &entinfo );
		//NOTE: for some wacko reason entities are sometimes
		// not updated
		//if (!entinfo.valid) return qtrue;
		if ( entinfo.ltime < AAS_Time() - 0.5 ) {
			return qtrue;
		}
	} //end if
	return qfalse;
} //end of the function BotItemGoalInVisButNotVisible
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotResetGoalState( int goalstate ) {
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return;
	}
	memset( gs->goalstack, 0, MAX_GOALSTACK * sizeof( bot_goal_t ) );
	gs->goalstacktop = 0;
	BotResetAvoidGoals( goalstate );
} //end of the function BotResetGoalState
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
int BotLoadItemWeights( int goalstate, char *filename ) {
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return BLERR_CANNOTLOADITEMWEIGHTS;
	}
	//load the weight configuration
	gs->itemweightconfig = ReadWeightConfig( filename );
	if ( !gs->itemweightconfig ) {
		botimport.Print( PRT_FATAL, "couldn't load weights\n" );
		return BLERR_CANNOTLOADITEMWEIGHTS;
	} //end if
	  //if there's no item configuration
	if ( !itemconfig ) {
		return BLERR_CANNOTLOADITEMWEIGHTS;
	}
	//create the item weight index
	gs->itemweightindex = ItemWeightIndex( gs->itemweightconfig, itemconfig );
	//everything went ok
	return BLERR_NOERROR;
} //end of the function BotLoadItemWeights
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
void BotFreeItemWeights( int goalstate ) {
	bot_goalstate_t *gs;

	gs = BotGoalStateFromHandle( goalstate );
	if ( !gs ) {
		return;
	}
	if ( gs->itemweightconfig ) {
		FreeWeightConfig( gs->itemweightconfig );
	}
	if ( gs->itemweightindex ) {
		FreeMemory( gs->itemweightindex );
	}
} //end of the function BotFreeItemWeights
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
int BotAllocGoalState( int client ) {
	int i;

	for ( i = 1; i <= MAX_CLIENTS; i++ )
	{
		if ( !botgoalstates[i] ) {
			botgoalstates[i] = GetClearedMemory( sizeof( bot_goalstate_t ) );
			botgoalstates[i]->client = client;
			return i;
		} //end if
	} //end for
	return 0;
} //end of the function BotAllocGoalState
//========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//========================================================================
void BotFreeGoalState( int handle ) {
	if ( handle <= 0 || handle > MAX_CLIENTS ) {
		botimport.Print( PRT_FATAL, "goal state handle %d out of range\n", handle );
		return;
	} //end if
	if ( !botgoalstates[handle] ) {
		botimport.Print( PRT_FATAL, "invalid goal state handle %d\n", handle );
		return;
	} //end if
	BotFreeItemWeights( handle );
	FreeMemory( botgoalstates[handle] );
	botgoalstates[handle] = NULL;
} //end of the function BotFreeGoalState
//===========================================================================
//
// Parameter:				-
// Returns:					-
// Changes Globals:		-
//===========================================================================
int BotSetupGoalAI( void ) {
	char *filename;

	//check if teamplay is on
	g_gametype = LibVarValue( "g_gametype", "0" );
	//item configuration file
	filename = LibVarString( "itemconfig", "items.c" );
	//load the item configuration
	itemconfig = LoadItemConfig( filename );
	if ( !itemconfig ) {
		botimport.Print( PRT_FATAL, "couldn't load item config\n" );
		return BLERR_CANNOTLOADITEMCONFIG;
	} //end if
	  //everything went ok
	return BLERR_NOERROR;
} //end of the function BotSetupGoalAI
//===========================================================================
//
// Parameter:			-
// Returns:				-
// Changes Globals:		-
//===========================================================================
void BotShutdownGoalAI( void ) {
	int i;

	if ( itemconfig ) {
		FreeMemory( itemconfig );
	}
	itemconfig = NULL;
	if ( levelitemheap ) {
		FreeMemory( levelitemheap );
	}
	levelitemheap = NULL;
	freelevelitems = NULL;
	levelitems = NULL;
	numlevelitems = 0;

	BotFreeInfoEntities();

	for ( i = 1; i <= MAX_CLIENTS; i++ )
	{
		if ( botgoalstates[i] ) {
			BotFreeGoalState( i );
		} //end if
	} //end for
} //end of the function BotShutdownGoalAI