import type { TimeValue } from '../../../core/types/time.js';
/**
 * Contains details for an expression, including offset and round-down units.
 */
type ExpressionDetails = {
    offsetAmount: number;
    offsetUnit?: OffsetUnit;
    roundDownUnit?: RoundDownUnit;
};
/**
 * Defines the units of time that can be used for offsetting.
 */
type OffsetUnit = 'y' | 'q' | 'M' | 'w' | 'd' | 'h' | 'm' | 's' | 'ms';
/**
 * Defines the units of time that can be used for rounding down.
 */
type RoundDownUnit = 'y' | 'q' | 'M' | 'w' | 'w0' | 'w1' | 'w2' | 'w3' | 'w4' | 'w5' | 'w6' | 'd' | 'h' | 'm' | 's';
/**
 * Determines the lowest common denominator for OffsetUnits between two TimeValues.
 * @internal
 */
export declare function getSmallestCommonUnit(from: TimeValue | undefined | null, to: TimeValue | undefined | null): OffsetUnit;
/**
 * Returns the difference between two TimeValues in the lowest possible OffsetUnit.
 * @internal
 */
export declare function getDifference(from: TimeValue | undefined | null, to: TimeValue | undefined | null): number;
/**
 * Calculates the difference between a relative time and now in a specified OffsetUnit.
 * @internal
 */
export declare function getTimeDifferenceInUnit(details: ExpressionDetails | undefined, relativeDate: number, targetUnit: OffsetUnit | RoundDownUnit | undefined): number;
export {};