import { Duration } from 'date-fns';
export type UnixTimeMs = number;
export type DateTimeFormat = number | string;
export interface AbsoluteTimeRange {
    start: Date;
    end: Date;
}
export interface RelativeTimeRange {
    end?: Date;
    pastDuration: DurationString;
}
export type TimeRangeValue = AbsoluteTimeRange | RelativeTimeRange;
/**
 * Determine whether a given time range is relative
 */
export declare function isRelativeTimeRange(timeRange: TimeRangeValue): timeRange is RelativeTimeRange;
/**
 * Determine whether a given time range is absolute
 */
export declare function isAbsoluteTimeRange(timeRange: TimeRangeValue): timeRange is AbsoluteTimeRange;
/**
 * Returns an absolute time range from a RelativeTimeRange.
 */
export declare function toAbsoluteTimeRange(timeRange: RelativeTimeRange): AbsoluteTimeRange;
type MillisecondsDurationString = `${number}ms`;
type SecondsDurationString = `${number}s`;
type MinutesDurationString = `${number}m`;
type HoursDurationString = `${number}h`;
type DaysDurationString = `${number}d`;
type WeeksDurationString = `${number}w`;
type YearsDurationString = `${number}y`;
export type DurationString = Exclude<`${YearsDurationString | ''}${WeeksDurationString | ''}${DaysDurationString | ''}${HoursDurationString | ''}${MinutesDurationString | ''}${SecondsDurationString | ''}${MillisecondsDurationString | ''}`, ''>;
export declare const DURATION_REGEX: RegExp;
/**
 * Parses a DurationString into a Duration object with numeric values that can
 * be used to do Date math. Throws if not a valid duration string.
 */
export declare function parseDurationString(durationString: string): Duration;
/**
 * Returns true if the given string is a valid DurationString.
 */
export declare function isDurationString(maybeDuration: string): maybeDuration is DurationString;
export declare function intervalToPrometheusDuration(timeRange: AbsoluteTimeRange): Duration;
export declare function msToPrometheusDuration(durationInMs: number): Duration;
export declare function formatDuration(duration: Duration): DurationString;
/**
 * Round interval to clearer increments
 */
export declare function roundStepInterval(stepMs: number): number;
/**
 * Gets a suggested step/interval size for a time range based on the width of a visual component.
 */
export declare function getSuggestedStepMs(timeRange: AbsoluteTimeRange, width: number): number;
export {};
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