/**

 * 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_GAMECONFIG_SYSTEM_H_

#define _INCLUDE_SOURCEMOD_GAMECONFIG_SYSTEM_H_

#include <IShareSys.h>

#include <IHandleSys.h>

#include <ITextParsers.h>

/**

 * @file IGameConfigs.h

 * @brief Abstracts game private data configuration.

 */

#define SMINTERFACE_GAMECONFIG_NAME			"IGameConfigManager"

#define SMINTERFACE_GAMECONFIG_VERSION		5

class SendProp;

namespace SourceMod

{

	/**

	 * @brief Describes a game private data config file

	 */

	class IGameConfig

	{

	public:

		/**

		 * @brief Returns an offset value.

		 *

		 * @param key			Key to retrieve from the offset section.

		 * @param value			Pointer to store the offset value in.

		 * @return				True if found, false otherwise.

		 */

		virtual bool GetOffset(const char *key, int *value) =0;

		/**

		 * @brief Returns information about a dynamic offset.

		 *

		 * @param key			Key to retrieve from the property section.

		 * @return				A SendProp pointer, or NULL if not found.

		 */

		virtual SendProp *GetSendProp(const char *key) =0;

		/**

		 * @brief Returns the value of a key from the "Keys" section.

		 *

		 * @param key			Key to retrieve from the Keys section.

		 * @return				String containing the value, or NULL if not found.

		 */

		virtual const char *GetKeyValue(const char *key) =0;

		/**

		 * @brief Retrieves a cached memory signature.

		 *

		 * @param key			Name of the signature.

		 * @param addr			Pointer to store the memory address in.

		 * @return				True if the key was found, false otherwise.

		 *						Note that true is a valid return even if the

		 *						address is NULL.

		 */

		virtual bool GetMemSig(const char *key, void **addr) =0;

	};

	/**

	 * @brief Manages game config files

	 */

	class IGameConfigManager : public SMInterface

	{

	public:

		const char *GetInterfaceName()

		{

			return SMINTERFACE_GAMECONFIG_NAME;

		}

		unsigned int GetInterfaceVersion()

		{

			return SMINTERFACE_GAMECONFIG_VERSION;

		}

	public:

		/**

		 * @brief Loads or finds an already loaded game config file.  

		 *

		 * @param file		File to load.  The path must be relative to the 

		 *					'gamedata' folder and the extension should be 

		 *					omitted.

		 * @param pConfig	Pointer to store the game config pointer.  Pointer 

		 *					will be valid even on failure.

		 * @param error		Optional error message buffer.

		 * @param maxlength	Maximum length of the error buffer.

		 * @return			True on success, false if the file failed.

		 */

		virtual bool LoadGameConfigFile(const char *file, 

			IGameConfig **pConfig, 

			char *error, 

			size_t maxlength) =0;

		/**

		 * @brief Closes an IGameConfig pointer.  Since a file can be loaded 

		 * more than once, the file will not actually be removed from memory 

		 * until it is closed once for each call to LoadGameConfigfile().

		 *

		 * @param cfg		Pointer to the IGameConfig to close.

		 */

		virtual void CloseGameConfigFile(IGameConfig *cfg) =0;

		/**

		 * @brief Reads an GameConfig Handle.

		 *

		 * @param hndl		Handle to read.

		 * @param ident		Identity of the owner (can be NULL).

		 * @param err		Optional error buffer.

		 * @return			IGameConfig pointer on success, NULL otherwise.

		 */

		virtual IGameConfig *ReadHandle(Handle_t hndl,

			IdentityToken_t *ident,

			HandleError *err) =0;

		/**

		 * @brief Adds a custom gamedata section hook.

		 *

		 * @param sectionname	Section name to hook.

		 * @param listener		Listener callback.

		 * @noreturn

		 */

		virtual void AddUserConfigHook(const char *sectionname, ITextListener_SMC *listener) =0;

		/**

		 * @brief Removes a custom gamedata section hook.

		 *

		 * @param sectionname	Section name to unhook.

		 * @param listener		Listener callback.

		 * @noreturn

		 */

		virtual void RemoveUserConfigHook(const char *sectionname, ITextListener_SMC *listener) =0;

		/**

		 * @brief Does nothing.

		 */

		virtual void AcquireLock() = 0;

		/**

		 * @brief Does nothing.

		 */

		virtual void ReleaseLock() = 0;

	};

}

#endif //_INCLUDE_SOURCEMOD_GAMECONFIG_SYSTEM_H_