/**

 * vim: set ts=4 :

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

 * 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_CONVARMANAGER_H_

#define _INCLUDE_SOURCEMOD_CONVARMANAGER_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 *pChangeForward;	/**< Forward associated with convar */

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

#if PLAPI_VERSION < 12

	const char *name;					/**< Name of convar */

#endif

};

/**

 * Holds information about a client convar query

 */

struct ConVarQuery

{

	QueryCvarCookie_t cookie;			/**< Cookie that identifies query */

	IPluginFunction *pCallback;			/**< Function that will be called when query is finished */

	cell_t value;						/**< Optional value passed to query function */

};

class ConVarManager :

	public SMGlobalClass,

	public IHandleTypeDispatch,

	public IPluginsListener,

	public IRootConsoleCommand

{

public:

	ConVarManager();

	~ConVarManager();

public: // SMGlobalClass

	void OnSourceModAllInitialized();

	void OnSourceModShutdown();

	void OnSourceModVSPReceived(IServerPluginCallbacks *iface);

public: // IHandleTypeDispatch

	void OnHandleDestroy(HandleType_t type, void *object);

public: // IPluginsListener

	void OnPluginUnloaded(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 *description, 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(ConVar *pConVar, IPluginFunction *pFunction);

	/**

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

	 */

	void UnhookConVarChange(ConVar *pConVar, IPluginFunction *pFunction);

	/**

	 * Starts a query to find the value of a client convar.

	 */

	QueryCvarCookie_t QueryClientConVar(edict_t *pPlayer, const char *name, IPluginFunction *pCallback,

	                                    Handle_t hndl);

#if PLAPI_VERSION >= 12

	/**

	 * Called when Metamod:Source is about to remove convar

	 */

	void OnUnlinkConCommandBase(PluginId id, ConCommandBase *pCommand);

#else

	/**

	 * Called when Metamod:Source has unloaded a plugin

	 */

	void OnMetamodPluginUnloaded(PluginId id);

#endif

private:

	/**

	 * Adds a convar to a plugin's list.

	 */

	static void AddConVarToPluginList(IPluginContext *pContext, const ConVar *pConVar);

	/**

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

	 */

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

	/**

	 * Callback for when StartQueryCvarValue() has finished.

	 */

	void OnQueryCvarValueFinished(QueryCvarCookie_t cookie, edict_t *pPlayer, EQueryCvarValueStatus result,

	                              const char *cvarName, const char *cvarValue);

private:

	HandleType_t m_ConVarType;

	List<ConVarInfo *> m_ConVars;

	List<ConVarQuery> m_ConVarQueries;

	Trie *m_ConVarCache;

	IServerPluginCallbacks *m_VSPIface;

	bool m_CanQueryConVars;

#if PLAPI_VERSION < 12

	bool m_IgnoreHandle;

#endif

};

extern ConVarManager g_ConVarManager;

#endif // _INCLUDE_SOURCEMOD_CONVARMANAGER_H_