/**

 * vim: set ts=4 :

 * =============================================================================

 * SourceMod

 * Copyright (C) 2004-2008 AlliedModders LLC.  All rights reserved.

 * =============================================================================

 *

 * This program is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License, version 3.0, 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/>.

 *

 * As a special exception, AlliedModders LLC gives you permission to link the

 * code of this program (as well as its derivative works) to "Half-Life 2," the

 * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software

 * by the Valve Corporation.  You must obey the GNU General Public License in

 * all respects for all other code used.  Additionally, AlliedModders LLC grants

 * this exception to all derivative works.  AlliedModders LLC defines further

 * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),

 * or <http://www.sourcemod.net/license.php>.

 *

 * Version: $Id$

 */

#ifndef _INCLUDE_SOURCEMOD_GAMEHELPERS_H_

#define _INCLUDE_SOURCEMOD_GAMEHELPERS_H_

#include <IShareSys.h>

/**

 * @file IGameHelpers.h

 * @brief Provides Source helper functions.

 */

#define SMINTERFACE_GAMEHELPERS_NAME		"IGameHelpers"

#define SMINTERFACE_GAMEHELPERS_VERSION		10

class CBaseEntity;

class CBaseHandle;

class SendProp;

class ServerClass;

class ICommandLine;

struct edict_t;

struct datamap_t;

struct typedescription_t;

#define TEXTMSG_DEST_NOTIFY  1

#define TEXTMSG_DEST_CONSOLE 2

#define TEXTMSG_DEST_CHAT    3

#define TEXTMSG_DEST_CENTER  4

namespace SourceMod

{

	/**

	 * @brief Maps the heirarchy of a SendProp.

	 */

	struct sm_sendprop_info_t

	{

		SendProp *prop;					/**< Property instance. */

		unsigned int actual_offset;		/**< Actual computed offset. */

	};

	struct sm_datatable_info_t

	{

		typedescription_t *prop;			/**< Property instance. */

		unsigned int actual_offset;		/**< Actual computed offset. */

	};

	class IGameHelpers : public SMInterface

	{

	public:

		virtual const char *GetInterfaceName()

		{

			return SMINTERFACE_GAMEHELPERS_NAME;

		}

		virtual unsigned int GetInterfaceVersion()

		{

			return SMINTERFACE_GAMEHELPERS_VERSION;

		}

	public:

		/**

		 * @brief Deprecated; use FindSendPropInfo() instead.

		 *

		 * @param classname		Do not use.

		 * @param offset		Do not use.

		 * @return				Do not use.

		 */

		virtual SendProp *FindInSendTable(const char *classname, const char *offset) =0;

		/**

		 * @brief Finds a named server class.

		 *

		 * @return				ServerClass pointer on success, NULL on failure.

		 */

		virtual ServerClass *FindServerClass(const char *classname) =0;

		/**

		 * @brief Finds a datamap_t definition.

		 *

		 * @param pMap			datamap_t pointer.

		 * @param offset		Property name.

		 * @return				typedescription_t pointer on success, NULL 

		 *						on failure.

		 */

		virtual typedescription_t *FindInDataMap(datamap_t *pMap, const char *offset) =0;

		/**

		 * @brief Retrieves an entity's datamap_t pointer.

		 *

		 * @param pEntity		CBaseEntity entity.

		 * @return				datamap_t pointer, or NULL on failure.

		 */

		virtual datamap_t *GetDataMap(CBaseEntity *pEntity) =0;

		/**

		 * @brief Marks an edict as state changed for an offset.

		 *

		 * @param pEdict		Edict pointer.

		 * @param offset		Offset index.

		 */

		virtual void SetEdictStateChanged(edict_t *pEdict, unsigned short offset) =0;

		/**

		 * @brief Sends a text message to a client.

		 *

		 * @param client		Client index.

		 * @param dest			Destination on the HUD (see TEXTMSG_DEST defines above).

		 * @param msg			Message to send.

		 * @return				True on success, false on failure.

		 */

		virtual bool TextMsg(int client, int dest, const char *msg) =0;

		/**

		 * @brief Returns whether the server ls a LAN server.

		 * 

		 * @return				True if LAN server, false otherwise.

		 */

		virtual bool IsLANServer() =0;

		/**

		 * @brief Finds a send property in a named ServerClass.

		 *

		 * This version, unlike FindInSendTable(), correctly deduces the 

		 * offsets of nested tables.

		 *

		 * @param classname		ServerClass name (such as CBasePlayer).

		 * @param offset		Offset name (such as m_iAmmo).

		 * @param info			Buffer to store sm_sendprop_info_t data.

		 * @return				True on success, false on failure.

		 */

		virtual bool FindSendPropInfo(const char *classname,

			const char *offset,

			sm_sendprop_info_t *info) =0;

		/**

		 * @brief Converts an entity index into an edict pointer.

		 *

		 * @param index			Entity Index.

		 * @return				Edict pointer or NULL on failure.

		 */

		virtual edict_t *EdictOfIndex(int index) =0;

		/**

		* @brief Converts an edict pointer into an entity index.

		*

		* @param index			Edict Pointer.

		* @return				Entity index or -1 on failure.

		*/

		virtual int IndexOfEdict(edict_t *pEnt) =0;

		/**

		 * @brief Retrieves the edict pointer from a CBaseHandle object.

		 *

		 * @param hndl			CBaseHandle object.

		 * @return				Edict pointer or NULL on failure.

		 */

		virtual edict_t *GetHandleEntity(CBaseHandle &hndl) =0;

		/**

		 * @brief Sets the edict pointer in a CBaseHandle object.

		 *

		 * @param hndl			CBaseHandle object.

		 * @param pEnt			Edict pointer.

		 * @noreturn

		 */

		virtual void SetHandleEntity(CBaseHandle &hndl, edict_t *pEnt) =0;

		/**

		 * @brief Returns the current map name.

		 *

		 * @return				Current map name.

		 */

		virtual const char *GetCurrentMap() =0;

		/**

		 * @brief Wraps IVEngineServer::ServerCommand.

		 *

		 * @param buffer		Command buffer (does not auto \n terminate).

		 */

		virtual void ServerCommand(const char *buffer) =0;

		/**

		 * @brief Looks up a reference and returns the CBasseEntity* it points to.

		 *

		 * @note Supports 'old style' simple indexes and does a serial confirmation check on references.

		 *

		 * @param entRef		Entity reference.

		 * @return				Entity pointer.

		 */

		virtual CBaseEntity *ReferenceToEntity(cell_t entRef) =0;

		/**

		 * @brief Returns the entity reference for an entity.

		 *

		 * @param pEntity		Entity pointer.

		 * @return				Entity reference.

		 */

		virtual cell_t EntityToReference(CBaseEntity *pEntity) =0;

		/**

		 * @brief Returns the entity reference for logical entities, or the index for networked entities.

		 *

		 * @param pEntity		Entity pointer.

		 * @return				Entity reference/index.

		 */

		virtual cell_t EntityToBCompatRef(CBaseEntity *pEntity) =0;

		/**

		 * @brief Converts an entity index into an entity reference.

		 *

		 * @param entIndex		Entity index.

		 * @return				Entity reference.

		 */

		virtual cell_t IndexToReference(int entIndex) =0;

		/**

		 * @brief Retrieves the entity index from a reference.

		 *

		 * @param entRef		Entity reference.

		 * @return				Entity index.

		 */

		virtual int ReferenceToIndex(cell_t entRef) =0;

		/**

		 * @brief Converts a reference into a bcompat version (index for networked entities).

		 *

		 * @param entRef		Entity reference.

		 * @return				Entity reference/index.

		 */

		virtual cell_t ReferenceToBCompatRef(cell_t entRef) =0;

		/**

		 * @brief Returns the g_EntList pointer.

		 *

		 * @return				g_EntList pointer.

		 */

		virtual void *GetGlobalEntityList() =0;

		/**

		 * @brief Adds a client to the kick queue, where they will be kicked

		 * next game frame.

		 *

		 * The user ID is used to ensure the correct player is kicked.

		 *

		 * @param client		The index of the client to kick.

		 * @param userid		The user ID of the client to kick.

		 * @param msg			The kick message to show to the player.

		 */

		virtual void AddDelayedKick(int client, int userid, const char *msg) =0;

		/**

		 * @brief Returns the uncomputed offset of a SendProp.

		 *

		 * @param prop          SendProp pointer.

		 * @return              Uncomputed sendprop offset.

		 */

		virtual int GetSendPropOffset(SendProp *prop) =0;

		/**

		 * @brief Sends a hint message to a client.

		 *

		 * @param client		Client index.

		 * @param msg			Message to send.

		 * @return				True on success, false on failure.

		 */

		virtual bool HintTextMsg(int client, const char *msg) =0;

		/**

		 * @brief Retrieves the Valve command line pointer.

		 *

		 * @return				ICommandLine ptr or NULL if not found.

		 */

		virtual ICommandLine *GetValveCommandLine() =0;

		/**

		 * @brief Gets a Classname from an edict_t pointer.

		 *

		 * @param pEdict		edict_t pointer.

		 * @return				Pointer to the string, or NULL if bad pointer.

		 */

		virtual const char *GetEntityClassname(edict_t *pEdict) =0;

		/**

		 * @brief Gets a Classname from an CBaseEntity pointer.

		 *

		 * @param pEntity		CBaseEntity pointer.

		 * @return				Pointer to the string, or NULL if bad pointer.

		 */

		virtual const char *GetEntityClassname(CBaseEntity *pEntity) =0;

		/**

		 * @brief Returns whether or not a map name is valid to use with the

		 * engine's Changelevel functionality. It need not be an exact filename on

		 * some engines. For a check on the exact name, use IVEngineServer::IsMapValid.

		 *

		 * @param map			Map name.

		 * @return				True if valid, otherwise false.

		 */

		virtual bool IsMapValid(const char *map) =0;

		/**

		 * @brief Finds a datamap_t definition.

		 *

		 * @param pMap			datamap_t pointer.

		 * @param offset			Property name.

		 * @param pDataTable	Buffer to store sm_datatable_info_t data.

		 * @return				typedescription_t pointer on success, NULL 

		 *						on failure.

		 */

		virtual bool FindDataMapInfo(datamap_t *pMap, const char *offset, sm_datatable_info_t *pDataTable) =0;

	};

}

#endif //_INCLUDE_SOURCEMOD_GAMEHELPERS_H_