#ifndef SYSTIMER_H
#define SYSTIMER_H

#include <cstdint>
#include "CanFwInterface.h"

// миллисекундный таймер. Макс. таймаут - 2**32 мс.

class TimerMs {
public:
	typedef uint32_t T_Timer;

	TimerMs()
	{	Restart();		}
	virtual ~TimerMs()
	{	}

	virtual inline T_Timer Restart(void)
	{
		auto prev = _tmr;
		_tmr = CntValue();
		return _tmr - prev;
	}

	inline T_Timer Value(void) const
	{	return CntValue() - _tmr;	}

	inline T_Timer Rest(const T_Timer timeout) const
	{
		T_Timer elapsed = Value();
		if (elapsed < timeout)
			return timeout - elapsed;
		return 0;
	}

	inline bool CheckTimeout(const T_Timer timeout) const
	{	return Value() > timeout;	}

private:
	T_Timer _tmr;

	static inline T_Timer CntValue(void)
	{	return CoreFunc->GetTickMs();	}

};

class TimerMsOnce : public TimerMs
{
public:
	TimerMsOnce() :	TimerMs()
	{	started = true;	}
	virtual ~TimerMsOnce()
	{	}

	virtual inline T_Timer Restart(void)
	{
		auto elapsed = TimerMs::Restart();
		started = true;
		return elapsed;
	}

	inline bool IsStarted(void) const
	{	return started;		}

	inline void Stop(void)
	{	started = false;	}

	virtual inline bool CheckTimeout(T_Timer timeout)
	{
		if (started)
		{
			if (Value() <= timeout)
				return false;
			Stop();
		}
		return true;
	}

private:
	bool started;
};

#endif // SYSTIMER_H