// From: https://github.com/icholy/Duration.js/pull/15
// Once the above is merged, use the inbuilt module types
declare module "duration-js" {
	type DurationLike = Duration | string | number;
	type DateLike = Date | number;

	class Duration {

		private _milliseconds: number;

		constructor(value?: DurationLike);

		static millisecond: Duration;
		static second:      Duration;
		static minute:      Duration;
		static hour:        Duration;
		static day:         Duration;
		static week:        Duration;

		static milliseconds(milliseconds: number): Duration;
		static seconds(seconds: number):           Duration;
		static minutes(minutes: number):           Duration;
		static hours(hours: number):               Duration;
		static days(days: number):                 Duration;
		static weeks(weeks: number):               Duration;

		nanoseconds():  number;
		microseconds(): number;
		milliseconds(): number;
		seconds():      number;
		minutes():      number;
		hours():        number;
		days():         number;
		weeks():        number;

		toString(): string;
		valueOf():  number;

		isGreaterThan(duration: DurationLike): boolean;
		isLessThan(duration: DurationLike):    boolean;
		isEqualTo(duration: DurationLike):     boolean;

		roundTo(duration: DurationLike): void;

		after(date: DateLike): Date;

		static since(date: DateLike):             Duration;
		static until(date: DateLike):             Duration;
		static between(a: DateLike, b: DateLike): Duration;
		static parse(duration: string):           Duration;
		static fromMicroseconds(us: number):      Duration;
		static fromNanoseconds(ns: number):       Duration;

		static add(a: Duration, b: Duration):      Duration;
		static subtract(a: Duration, b: Duration): Duration;
		static multiply(a: Duration, b: number):   Duration;
		static multiply(a: number, b: Duration):   Duration;
		static divide(a: Duration, b: Duration):   number;
		static abs(d: DurationLike):               Duration;
	}
	export = Duration;
}