/**

 * vim: set ts=4 :

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

 * SourceMod

 * Copyright (C) 2004-2007 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_MAIN_HELPER_INTERFACE_H_

#define _INCLUDE_SOURCEMOD_MAIN_HELPER_INTERFACE_H_

/**

 * @file ISourceMod.h

 * @brief Defines miscellaneous helper functions useful to extensions.

 */

#include <IHandleSys.h>

#include <sp_vm_api.h>

#include <IDataPack.h>

#define SMINTERFACE_SOURCEMOD_NAME		"ISourceMod"

#define SMINTERFACE_SOURCEMOD_VERSION	3

/**

* @brief Forward declaration of the KeyValues class.

*/

class KeyValues;

namespace SourceMod

{

	/**

	 * @brief Describes various ways of formatting a base path.

	 */

	enum PathType

	{

		Path_None = 0,			/**< No base path */

		Path_Game,				/**< Base path is absolute mod folder */

		Path_SM,				/**< Base path is absolute to SourceMod */

		Path_SM_Rel,			/**< Base path is relative to SourceMod */

	};

	/**

	 * @brief Contains miscellaneous helper functions.

	 */

	class ISourceMod : public SMInterface

	{

	public:

		virtual const char *GetInterfaceName()

		{

			return SMINTERFACE_SOURCEMOD_NAME;

		}

		virtual unsigned int GetInterfaceVersion()

		{

			return SMINTERFACE_SOURCEMOD_VERSION;

		}

	public:

		/**

		 * @brief Returns the full path to the game directory.

		 *

		 * @return			A string containing the full game path.

		 */

		virtual const char *GetGamePath() const =0;

		/**

		 * @brief Returns the full path to the SourceMod directory.

		 *

		 * @return			A string containing the full SourceMod path.

		 */

		virtual const char *GetSourceModPath() const =0;

		/**

		 * @brief Builds a platform path for a specific target base path.

		 *

		 * @param type		Type of path to use as a base.

		 * @param buffer	Buffer to write to.

		 * @param maxlength	Size of buffer.

		 * @param format	Format string.

		 * @param ...		Format arguments.

		 * @return			Number of bytes written.

		 */

		virtual size_t BuildPath(PathType type, char *buffer, size_t maxlength, char *format, ...) =0;

		/**

		 * @brief Logs a message to the SourceMod logs.

		 *

		 * @param pExt		Extension calling this function.

		 * @param format	Message format.

		 * @param ...		Message format parameters.

		 */

		virtual void LogMessage(IExtension *pExt, const char *format, ...) =0;

		/**

		 * @brief Logs a message to the SourceMod error logs.

		 *

		 * @param pExt		Extension calling this function.

		 * @param format	Message format.

		 * @param ...		Message format parameters.

		 */

		virtual void LogError(IExtension *pExt, const char *format, ...) =0;

		/**

		 * @brief Formats a string from a native.

		 *

		 * @param buffer		Buffer to store message.

		 * @param maxlength		Maximum length of buffer (including null terminator).

		 * @param pContext		Pointer to the plugin's context.

		 * @param params		Parameter array that was passed to the native.

		 * @param param			Parameter index where format string and variable arguments begin.

		 *						Note: parameter indexes start at 1.

		 * @return				Number of bytes written, not including the null terminator.

		 */

		virtual size_t FormatString(char *buffer, 

									size_t maxlength, 

									SourcePawn::IPluginContext *pContext,

									const cell_t *params,

									unsigned int param) =0;

		/**

		 * @brief Creates a data pack object.

		 *

		 * @return			A new IDataPack object.

		 */

		virtual IDataPack *CreateDataPack() =0;

		/**

		 * @brief Releases a data pack's resources so it can be re-used.

		 *

		 * @param pack		An IDataPack object to release.

		 */

		virtual void FreeDataPack(IDataPack *pack) =0;

		/**

		 * @brief Not implemented, do not use.

		 *

		 * @param readonly	Ignored

		 * @return			0

		 */

		virtual HandleType_t GetDataPackHandleType(bool readonly=false) =0;

		/**

		 * @brief Retrieves a KeyValues pointer from a handle.

		 *

		 * @param hndl		Handle_t from which to retrieve contents.

		 * @param err		Optional address to store a possible handle error.

		 * @param root		If true it will return the root KeyValues pointer for the whole structure.

		 *

		 * @return			The KeyValues pointer, or NULL for any error encountered.

		 */

		virtual KeyValues *ReadKeyValuesHandle(Handle_t hndl, HandleError *err=NULL, bool root=false) =0;

		/**

		 * @brief Returns the name of the game directory.

		 *

		 * @return			A string containing the name of the game directory.

		 */

		virtual const char *GetGameFolderName() const =0;

		/**

		 * @brief Returns the scripting engine interface.

		 *

		 * @return			A pointer to the scripting engine interface.

		 */

		virtual SourcePawn::ISourcePawnEngine *GetScriptingEngine() =0;

		/**

		 * @brief Returns the JIT interface.

		 *

		 * @return			A pointer to the JIT interface.

		 */

		virtual SourcePawn::IVirtualMachine *GetScriptingVM() =0;

	};

}

#endif //_INCLUDE_SOURCEMOD_MAIN_HELPER_INTERFACE_H_