import { type BimodalDistribution, type CustomDistribution, type DistributionPreset } from './sample-distribution.js';
/**
 * Random delay range configuration.
 * - number: delays by a random value from 0 to the specified value (exclusive)
 * - {min, max}: delays by a random value from min to max (exclusive)
 * - {min, max, distribution?}: delays with specified probability distribution
 */
export type RandomDelayRange = number | {
    min: number;
    max: number;
    /**
     * Probability distribution type for random delay generation.
     * - If not specified, defaults to 'uniform' (backward compatible)
     * - Use preset types or provide a custom weight function
     */
    distribution?: DistributionPreset | BimodalDistribution | CustomDistribution;
};
/**
 * Options for delay with random duration.
 */
export type DelayOptions = {
    /**
     * Random range for delay duration in milliseconds.
     */
    random: RandomDelayRange;
};
/**
 * Delays the execution of code by the specified number of milliseconds.
 * @param msOrOptions - The number of milliseconds to delay, or options specifying a random delay range.
 * @param callback - Optional callback that receives the determined interval in milliseconds. Called synchronously before the delay starts.
 * @returns A promise that resolves after the specified delay.
 */
export declare function delay(msOrOptions: number | DelayOptions, callback?: (determinedInterval: number) => void): Promise<void>;