#ifndef TIMESTAMP_H
#define TIMESTAMP_H

/**
 * helper-class to handle timestamps
 */
struct Timestamp {

private:

	/** internal timestamp in milliseconds */
	int64_t _ms;

	/** HIDDEN ctor. use factory methods */
	explicit Timestamp(const int64_t ms) : _ms(ms) {;}

public:

	/** empty ctor */
	explicit Timestamp() : _ms(0) {;}

	/** get timestamp from the given value which represents milliesconds */
	static inline Timestamp fromMS(const int64_t ms)	{return Timestamp(ms);}

	/** get timestamp from the given value which represents seconds */
	static inline Timestamp fromSec(const float sec)	{return Timestamp(sec*1000);}


public:

	/** get timestamp in milliseconds */
	inline uint64_t ms() const {return _ms;}

	/** get timestamp in seconds */
	inline float sec() const {return _ms/1000.0f;}


public:

	/** is this timestamp zero? */
	bool isZero() const {return _ms == 0;}

	/** equal? */
	bool operator == (const Timestamp& o) const {return _ms == o._ms;}

	/** not equal? */
	bool operator != (const Timestamp& o) const {return _ms != o._ms;}

	/** smaller than the given one? */
	bool operator < (const Timestamp& o) const {return _ms < o._ms;}

	/** greater than the given one? */
	bool operator > (const Timestamp& o) const {return _ms > o._ms;}


	Timestamp operator - (const Timestamp& o) const {return Timestamp(_ms - o._ms);}

	Timestamp operator + (const Timestamp& o) const {return Timestamp(_ms + o._ms);}

	/** cast to float */
	operator float () const {return sec();}


};

#endif // TIMESTAMP_H