/*
===========================================================================
Copyright (C) 1999 - 2005, Id Software, Inc.
Copyright (C) 2000 - 2013, Raven Software, Inc.
Copyright (C) 2001 - 2013, Activision, Inc.
Copyright (C) 2013 - 2015, OpenJK contributors

This file is part of the OpenJK source code.

OpenJK is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.

This program 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 this program; if not, see <http://www.gnu.org/licenses/>.
===========================================================================
*/

// sv_game.c -- interface to the game dll
#include "server.h"
#include "botlib/botlib.h"
#include "qcommon/stringed_ingame.h"
#include "qcommon/RoffSystem.h"
#include "ghoul2/ghoul2_shared.h"
#include "qcommon/cm_public.h"
#include "icarus/GameInterface.h"
#include "qcommon/timing.h"
#include "NPCNav/navigator.h"
#include "sv_gameapi.h"

// these functions must be used instead of pointer arithmetic, because
// the game allocates gentities with private information after the server shared part
int	SV_NumForGentity( sharedEntity_t *ent ) {
	int		num;

	num = ( (byte *)ent - (byte *)sv.gentities ) / sv.gentitySize;

	return num;
}

sharedEntity_t *SV_GentityNum( int num ) {
	sharedEntity_t *ent;

	ent = (sharedEntity_t *)((byte *)sv.gentities + sv.gentitySize*(num));

	return ent;
}

playerState_t *SV_GameClientNum( int num ) {
	playerState_t	*ps;

	ps = (playerState_t *)((byte *)sv.gameClients + sv.gameClientSize*(num));

	return ps;
}

svEntity_t	*SV_SvEntityForGentity( sharedEntity_t *gEnt ) {
	if ( !gEnt || gEnt->s.number < 0 || gEnt->s.number >= MAX_GENTITIES ) {
		Com_Error( ERR_DROP, "SV_SvEntityForGentity: bad gEnt" );
	}
	return &sv.svEntities[ gEnt->s.number ];
}

sharedEntity_t *SV_GEntityForSvEntity( svEntity_t *svEnt ) {
	int		num;

	num = svEnt - sv.svEntities;
	return SV_GentityNum( num );
}

/*
=================
SV_inPVS

Also checks portalareas so that doors block sight
=================
*/
qboolean SV_inPVS (const vec3_t p1, const vec3_t p2)
{
	int		leafnum;
	int		cluster;
	int		area1, area2;
	byte	*mask;

	leafnum = CM_PointLeafnum (p1);
	cluster = CM_LeafCluster (leafnum);
	area1 = CM_LeafArea (leafnum);
	mask = CM_ClusterPVS (cluster);

	leafnum = CM_PointLeafnum (p2);
	cluster = CM_LeafCluster (leafnum);
	area2 = CM_LeafArea (leafnum);
	if ( mask && (!(mask[cluster>>3] & (1<<(cluster&7)) ) ) )
		return qfalse;
	if (!CM_AreasConnected (area1, area2))
		return qfalse;		// a door blocks sight
	return qtrue;
}

//==============================================

/*
===============
SV_ShutdownGameProgs

Called every time a map changes
===============
*/
void SV_ShutdownGameProgs( void ) {
	if ( !svs.gameStarted ) {
		return;
	}
	SV_UnbindGame();
}

/*
===============
SV_InitGameProgs

Called on a normal map change, not on a map_restart
===============
*/

void SV_InitGameProgs( void ) {
	//FIXME these are temp while I make bots run in vm
	extern int	bot_enable;

	cvar_t *var = Cvar_Get( "bot_enable", "1", CVAR_LATCH );
	bot_enable = var ? var->integer : 0;

	svs.gameStarted = qtrue;
	SV_BindGame();

	SV_InitGame( qfalse );
}


/*
====================
SV_GameCommand

See if the current console command is claimed by the game
====================
*/
qboolean SV_GameCommand( void ) {
	if ( sv.state != SS_GAME ) {
		return qfalse;
	}

	return GVM_ConsoleCommand();
}