/**

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

* 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_EVENTMANAGER_H_

#define _INCLUDE_SOURCEMOD_EVENTMANAGER_H_

#include "sm_globals.h"

#include "sourcemm_api.h"

#include "sm_trie.h"

#include <sh_list.h>

#include <sh_stack.h>

#include <IHandleSys.h>

#include <IForwardSys.h>

#include <IPluginSys.h>

using namespace SourceHook;

//#define EVENT_PASSTHRU	(1<<0)

#define EVENT_PASSTHRU_ALL	(1<<1)

struct EventInfo

{

	IGameEvent *pEvent;

	IdentityToken_t *pOwner;

};

struct EventHook

{

	EventHook()

	{

		pPreHook = NULL;

		pPostHook = NULL;

		postCopy = false;

		refCount = 0;

	}

	IChangeableForward *pPreHook;

	IChangeableForward *pPostHook;

	bool postCopy;

	unsigned int refCount;

};

enum EventHookMode

{

	EventHookMode_Pre,

	EventHookMode_Post,

	EventHookMode_PostNoCopy

};

enum EventHookError

{

	EventHookErr_Okay = 0,			/**< No error */

	EventHookErr_InvalidEvent,		/**< Specified event does not exist */

	EventHookErr_NotActive,			/**< Specified event has no active hook */

	EventHookErr_InvalidCallback,	/**< Specified event does not fire specified callback */ 

};

class EventManager :

	public SMGlobalClass,

	public IHandleTypeDispatch,

	public IPluginsListener,

	public IGameEventListener2

{

public:

	EventManager();

	~EventManager();

public: // SMGlobalClass

	void OnSourceModAllInitialized();

	void OnSourceModShutdown();

public: // IHandleTypeDispatch

	void OnHandleDestroy(HandleType_t type, void *object);

public: // IPluginsListener

	void OnPluginUnloaded(IPlugin *plugin);

public: // IGameEventListener2

	void FireGameEvent(IGameEvent *pEvent);

public:

	/**

	 * Get the 'GameEvent' handle type ID.

	 */

	inline HandleType_t GetHandleType()

	{

		return m_EventType;

	}

public:

	EventHookError HookEvent(const char *name, IPluginFunction *pFunction, EventHookMode mode=EventHookMode_Post);

	EventHookError UnhookEvent(const char *name, IPluginFunction *pFunction, EventHookMode mode=EventHookMode_Post);

	EventInfo *CreateEvent(IPluginContext *pContext, const char *name);

	void FireEvent(EventInfo *pInfo, int flags=0, bool bDontBroadcast=false);

private: // IGameEventManager2 hooks

	bool OnFireEvent(IGameEvent *pEvent, bool bDontBroadcast);

	bool OnFireEvent_Post(IGameEvent *pEvent, bool bDontBroadcast);

private:

	HandleType_t m_EventType;

	bool m_NotifyPlugins;

	const char *m_EventName;

	IGameEvent *m_EventCopy;

	Trie *m_EventHooks;

	CStack<EventInfo *> m_FreeEvents;

};

extern EventManager g_EventManager;

#endif // _INCLUDE_SOURCEMOD_EVENTMANAGER_H_