/**

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

* SourceMod (C)2004-2007 AlliedModders LLC.  All rights reserved.

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

*

* This file is not open source and may not be copied without explicit

* written permission of AlliedModders LLC.  This file may not be redistributed 

* in whole or significant part.

* For information, see LICENSE.txt or http://www.sourcemod.net/license.php

*

* Version: $Id$

*/

#ifndef _INCLUDE_SOURCEMOD_CCONVARMANAGER_H_

#define _INCLUDE_SOURCEMOD_CCONVARMANAGER_H_

#include "sm_globals.h"

#include "sourcemm_api.h"

#include "sm_trie.h"

#include <sh_list.h>

#include <IPluginSys.h>

#include <IForwardSys.h>

#include <IHandleSys.h>

#include <IRootConsoleMenu.h>

using namespace SourceHook;

/**

 * Holds SourceMod-specific information about a convar

 */

struct ConVarInfo

{

	Handle_t handle;					/**< Handle to convar */

	bool sourceMod;						/**< Determines whether or not convar was created by a SourceMod plugin */

	IChangeableForward *changeForward;	/**< Forward associated with convar */

	FnChangeCallback origCallback;		/**< The original callback function */

};

class CConVarManager :

	public SMGlobalClass,

	public IHandleTypeDispatch,

	public IPluginsListener,

	public IRootConsoleCommand

{

public:

	CConVarManager();

	~CConVarManager();

public: // SMGlobalClass

	void OnSourceModAllInitialized();

	void OnSourceModShutdown();

public: // IHandleTypeDispatch

	void OnHandleDestroy(HandleType_t type, void *object);

public: // IPluginsListener

	void OnPluginDestroyed(IPlugin *plugin);

public: //IRootConsoleCommand

	void OnRootConsoleCommand(const char *command, unsigned int argcount);

public:

	/**

	 * Get the 'ConVar' handle type ID.

	 */

	inline HandleType_t GetHandleType()

	{

		return m_ConVarType;

	}

	/**

	 * Get the convar lookup trie.

	 */

	inline Trie *GetConVarCache()

	{

		return m_ConVarCache;

	}

public:

	/**

	 * Create a convar and return a handle to it.

	 */

	Handle_t CreateConVar(IPluginContext *pContext, const char *name, const char *defaultVal, const char *helpText,

	                      int flags, bool hasMin, float min, bool hasMax, float max);

	/**

	 * Searches for a convar and returns a handle to it

	 */

	Handle_t FindConVar(const char* name);

	/**

	 * Add a function to call when the specified convar changes.

	 */

	void HookConVarChange(IPluginContext *pContext, ConVar *cvar, funcid_t funcid);

	/**

	 * Remove a function from the forward that will be called when the specified convar changes.

	 */

	void UnhookConVarChange(IPluginContext *pContext, ConVar *cvar, funcid_t funcid);

private:

	/**

	* Static callback that Valve's ConVar class executes when the convar's value changes.

	*/

	static void OnConVarChanged(ConVar *cvar, const char *oldValue);

private:

	HandleType_t m_ConVarType;

	List<ConVarInfo *> m_ConVars;

	Trie *m_ConVarCache;

};

extern CConVarManager g_ConVarManager;

#endif // _INCLUDE_SOURCEMOD_CCONVARMANAGER_H_