// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#pragma once

#include "ITimer.h"
#include "os.h"

namespace irr
{
//! Device independent implementation of the timer
class CTimer : public ITimer
{
public:
	CTimer()
	{
		os::Timer::initTimer();
	}

	//! Returns current real time in milliseconds of the system.
	/** This value does not start with 0 when the application starts.
	For example in one implementation the value returned could be the
	amount of milliseconds which have elapsed since the system was started. */
	u32 getRealTime() const override
	{
		return os::Timer::getRealTime();
	}

	//! Returns current virtual time in milliseconds.
	/** This value starts with 0 and can be manipulated using setTime(), stopTimer(),
	startTimer(), etc. This value depends on the set speed of the timer if the timer
	is stopped, etc. If you need the system time, use getRealTime() */
	u32 getTime() const override
	{
		return os::Timer::getTime();
	}

	//! sets current virtual time
	void setTime(u32 time) override
	{
		os::Timer::setTime(time);
	}

	//! Stops the game timer.
	/** The timer is reference counted, which means everything which calls
	stopTimer() will also have to call startTimer(), otherwise the timer may not start/stop
	corretly again. */
	void stop() override
	{
		os::Timer::stopTimer();
	}

	//! Starts the game timer.
	/** The timer is reference counted, which means everything which calls
	stopTimer() will also have to call startTimer(), otherwise the timer may not start/stop
	corretly again. */
	void start() override
	{
		os::Timer::startTimer();
	}

	//! Sets the speed of the timer
	/** The speed is the factor with which the time is running faster or slower then the
	real system time. */
	void setSpeed(f32 speed = 1.0f) override
	{
		os::Timer::setSpeed(speed);
	}

	//! Returns current speed of the timer
	/** The speed is the factor with which the time is running faster or slower then the
	real system time. */
	f32 getSpeed() const override
	{
		return os::Timer::getSpeed();
	}

	//! Returns if game timer is currently stopped
	bool isStopped() const override
	{
		bool ret = os::Timer::isStopped();
		return ret;
	}

	//! Advances the virtual time
	/** Makes the virtual timer update the time value based on the real time. This is
	called automatically when calling IrrlichtDevice::run(), but you can call it manually
	if you don't use this method. */
	void tick() override
	{
		os::Timer::tick();
	}
};

} // end namespace
