/* AMX Mod X
*   Counter-Strike Module
*
* by the AMX Mod X Development Team
*
* This file is part of AMX Mod X.
*
*
*  This program 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 2 of the License, or (at
*  your option) any later version.
*
*  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, write to the Free Software Foundation,
*  Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*  In addition, as a special exception, the author gives permission to
*  link the code of this program with the Half-Life Game Engine ("HL
*  Engine") and Modified Game Libraries ("MODs") developed by Valve,
*  L.L.C ("Valve"). You must obey the GNU General Public License in all
*  respects for all of the code used other than the HL Engine and MODs
*  from Valve. If you modify this file, you may extend this exception
*  to your version of the file, but you are not obligated to do so. If
*  you do not wish to do so, delete this exception statement from your
*  version.
*/
#ifndef CSTRIKE_UTILS_H
#define CSTRIKE_UTILS_H

bool UTIL_IsPlayer(AMX* amx, edict_t* pPlayer);
void UTIL_TextMsg_Generic(edict_t* pPlayer, const char* message);
void *UTIL_FindAddressFromEntry(const char *entry, bool isHidden = false, const char *library = "mod");

#define GETINFOKEYBUFFER	(*g_engfuncs.pfnGetInfoKeyBuffer)
#define	SETCLIENTKEYVALUE	(*g_engfuncs.pfnSetClientKeyValue)
#define GETCLIENTKEYVALUE	(*g_engfuncs.pfnInfoKeyValue)
#define CREATENAMEDENTITY	(*g_engfuncs.pfnCreateNamedEntity)

#define CHECK_ENTITY(x) \
	if (x < 0 || x > gpGlobals->maxEntities) { \
		MF_LogError(amx, AMX_ERR_NATIVE, "Entity out of range (%d)", x); \
		return 0; \
	} else { \
		if (x <= gpGlobals->maxClients) { \
			if (!MF_IsPlayerIngame(x)) { \
				MF_LogError(amx, AMX_ERR_NATIVE, "Invalid player %d (not in-game)", x); \
				return 0; \
			} \
		} else { \
			if (x != 0 && FNullEnt(INDEXENT(x))) { \
				MF_LogError(amx, AMX_ERR_NATIVE, "Invalid entity %d", x); \
				return 0; \
			} \
		} \
	}

#define CHECK_PLAYER(x) \
	if (x < 1 || x > gpGlobals->maxClients) { \
		MF_LogError(amx, AMX_ERR_NATIVE, "Player out of range (%d)", x); \
		return 0; \
	} else { \
		if (!MF_IsPlayerIngame(x) || FNullEnt(MF_GetPlayerEdict(x))) { \
			MF_LogError(amx, AMX_ERR_NATIVE, "Invalid player %d", x); \
			return 0; \
		} \
	}

#define CHECK_NONPLAYER(x) \
	if (x < 1 || x <= gpGlobals->maxClients || x > gpGlobals->maxEntities) { \
		MF_LogError(amx, AMX_ERR_NATIVE, "Non-player entity %d out of range", x); \
		return 0; \
	} else { \
		if (FNullEnt(INDEXENT(x))) { \
			MF_LogError(amx, AMX_ERR_NATIVE, "Invalid non-player entity %d", x); \
			return 0; \
		} \
	}

#define GETEDICT(n) \
	((n >= 1 && n <= gpGlobals->maxClients) ? MF_GetPlayerEdict(n) : INDEXENT(n))


inline edict_t *PrivateToEdict(const void *pdata)
{
	if (!pdata)
	{
		return NULL;
	}

	char *ptr = (char*)pdata;
	ptr += 4;
	entvars_t *pev = *(entvars_t **)ptr;

	if (!pev)
	{
		return NULL;
	}

	return pev->pContainingEntity;
};

inline int PrivateToIndex(const void *pdata)
{
	edict_t *pEntity = PrivateToEdict(pdata);

	if (!pEntity)
	{
		return -1;
	}

	return ENTINDEX(pEntity);
};

#endif // CSTRIKE_UTILS_H