/**

 * 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_TIMER_SYSTEM_H_

#define _INCLUDE_SOURCEMOD_TIMER_SYSTEM_H_

/**

 * @file ITimerSystem.h

 * @brief Contains functions for creating and managing timers.

 */

#include <IShareSys.h>

#include <IForwardSys.h>

#define SMINTERFACE_TIMERSYS_NAME		"ITimerSys"

#define SMINTERFACE_TIMERSYS_VERSION	1

namespace SourceMod

{

	class ITimer;

	/**

	 * @brief Event callbacks for when a timer is executed.

	 */

	class ITimedEvent

	{

	public:

		/**

		 * @brief Called when a timer is executed.

		 *

		 * @param pTimer		Pointer to the timer instance.

		 * @param pData			Private pointer passed from host.

		 * @return				Pl_Stop to stop timer, Pl_Continue to continue.

		 */

		virtual ResultType OnTimer(ITimer *pTimer, void *pData) =0;

		/**

		 * @brief Called when the timer has been killed.

		 *

		 * @param pTimer		Pointer to the timer instance.

		 * @param pData			Private data pointer passed from host.

		 */

		virtual void OnTimerEnd(ITimer *pTimer, void *pData) =0;

	};

	#define TIMER_FLAG_REPEAT			(1<<0)		/**< Timer will repeat until stopped */

	#define TIMER_FLAG_NO_MAPCHANGE		(1<<1)		/**< Timer will not carry over mapchanges */

	class ITimerSystem : public SMInterface

	{

	public:

		const char *GetInterfaceName()

		{

			return SMINTERFACE_TIMERSYS_NAME;

		}

		unsigned int GetInterfaceVersion()

		{

			return SMINTERFACE_TIMERSYS_VERSION;

		}

	public:

		/**

		 * @brief Creates a timed event.

		 *

		 * @param pCallbacks		Pointer to ITimedEvent callbacks.

		 * @param fInterval			Interval, in seconds, of the timed event to occur.

		 *							The smallest allowed interval is 0.1 seconds.

		 * @param pData				Private data to pass on to the timer.

		 * @param flags				Extra flags to pass on to the timer.

		 * @return					An ITimer pointer on success, NULL on failure.

		 */

		virtual ITimer *CreateTimer(ITimedEvent *pCallbacks, 

										 float fInterval, 

										 void *pData,

										 int flags) =0;

		/**

		 * @brief Kills a timer.

		 *

		 * @param pTimer			Pointer to the ITimer structure.

		 * @return

		 */

		virtual void KillTimer(ITimer *pTimer) =0;

		/**

		 * @brief Arbitrarily fires a timer.  If the timer is not a repeating 

		 * timer, this will also kill the timer.

		 *

		 * @param pTimer			Pointer to the ITimer structure.

		 * @param delayExec			If true, and the timer is repeating, the

		 *							next execution will be delayed by its interval.

		 * @return

		 */

		virtual void FireTimerOnce(ITimer *pTimer, bool delayExec=false) =0;

	};

}

#endif //_INCLUDE_SOURCEMOD_TIMER_SYSTEM_H_