#pragma once

#include <stdint.h>

constexpr double MICROS_TO_SECS = 0.000001;
constexpr double MICROS_TO_MILLIS = 0.001;

/**
 * A representation of time.
 */
class Time
{
public:
	/**
	 * A representation of time.
	 *
	 * @param time_micros Time in microseconds
	 */
	explicit Time(uint64_t time_micros);

	/**
	 * Updates the time to the current time.
	 */
	void update();

	/**
	 * Returns the difference between two points in time.
	 *
	 * @param prev_time A previous point in time
	 */
	Time diff(Time prev_time) const;

	/**
	 * Returns the time in seconds.
	 */
	double secs() const;

	/**
	 * Returns the time in milliseconds.
	 */
	double millisecs() const;

	/**
	 * Returns the time in microseconds.
	 */
	uint64_t microsecs() const;

private:
	uint64_t _time_micros;
};

/**
 * Returns a time object for the time since the program started.
 */
Time time_now();