/**
 * Converts a shorthand time string or number into milliseconds.
 * The shorthand can be a string like '1s', '2m', '3h', '4d', or a number representing milliseconds.
 * If the input is undefined, it returns undefined.
 * If the input is a string that does not match the expected format, it throws an error.
 * @param shorthand - A shorthand time string or number representing milliseconds.
 * @returns The equivalent time in milliseconds or undefined.
 */
declare const shorthandToMilliseconds: (shorthand?: string | number) => number | undefined;
/**
 * Converts a shorthand time string or number into a timestamp.
 * If the shorthand is undefined, it returns the current date's timestamp.
 * If the shorthand is a valid time format, it adds that duration to the current date's timestamp.
 * @param shorthand - A shorthand time string or number representing milliseconds.
 * @param fromDate - An optional Date object to calculate from. Defaults to the current date if not provided.
 * @returns The timestamp in milliseconds since epoch.
 */
declare const shorthandToTime: (shorthand?: string | number, fromDate?: Date) => number;

/**
 * CacheableItem
 * @typedef {Object} CacheableItem
 * @property {string} key - The key of the cacheable item
 * @property {any} value - The value of the cacheable item
 * @property {number|string} [ttl] - Time to Live - If you set a number it is miliseconds, if you set a string it is a human-readable
 * format such as `1s` for 1 second or `1h` for 1 hour. Setting undefined means that it will use the default time-to-live. If both are
 * undefined then it will not have a time-to-live.
 */
type CacheableItem = {
    key: string;
    value: any;
    ttl?: number | string;
};
/**
 * CacheableStoreItem
 * @typedef {Object} CacheableStoreItem
 * @property {string} key - The key of the cacheable store item
 * @property {any} value - The value of the cacheable store item
 * @property {number} [expires] - The expiration time in milliseconds since epoch. If not set, the item does not expire.
 */
type CacheableStoreItem = {
    key: string;
    value: any;
    expires?: number;
};

/**
 * Enqueue a promise for the group identified by `key`.
 *
 * All requests received for the same key while a request for that key
 * is already being executed will wait. Once the running request settles
 * then all the waiting requests in the group will settle, too.
 * This minimizes how many times the function itself runs at the same time.
 * This function resolves or rejects according to the given function argument.
 *
 * @url https://github.com/douglascayers/promise-coalesce
 */
declare function coalesceAsync<T>(
/**
 * Any identifier to group requests together.
 */
key: string, 
/**
 * The function to run.
 */
fnc: () => T | PromiseLike<T>): Promise<T>;

declare enum HashAlgorithm {
    SHA256 = "sha256",
    SHA512 = "sha512",
    MD5 = "md5",
    DJB2 = "djb2"
}
type HashOptions = {
    algorithm?: HashAlgorithm;
    serialize?: (object: any) => string;
};
type hashToNumberOptions = HashOptions & {
    min?: number;
    max?: number;
};
/**
 * Hashes an object using the specified algorithm. The default algorithm is 'sha256'.
 * @param object The object to hash
 * @param options The hash options to use
 * @returns {string} The hash of the object
 */
declare function hash(object: any, options?: HashOptions): string;
declare function hashToNumber(object: any, options?: hashToNumberOptions): number;

declare function isKeyvInstance(keyv: any): boolean;

declare function isObject<T = Record<string, unknown>>(value: unknown): value is T;

declare function lessThan(number1?: number, number2?: number): boolean;

type Function_<P, T> = (...arguments_: P[]) => T;
declare function runIfFn<T, P>(valueOrFunction: T | Function_<P, T>, ...arguments_: P[]): T;

declare const sleep: (ms: number) => Promise<unknown>;

type StatsOptions = {
    enabled?: boolean;
};
declare class Stats {
    private _hits;
    private _misses;
    private _gets;
    private _sets;
    private _deletes;
    private _clears;
    private _vsize;
    private _ksize;
    private _count;
    private _enabled;
    constructor(options?: StatsOptions);
    /**
     * @returns {boolean} - Whether the stats are enabled
     */
    get enabled(): boolean;
    /**
     * @param {boolean} enabled - Whether to enable the stats
     */
    set enabled(enabled: boolean);
    /**
     * @returns {number} - The number of hits
     * @readonly
     */
    get hits(): number;
    /**
     * @returns {number} - The number of misses
     * @readonly
     */
    get misses(): number;
    /**
     * @returns {number} - The number of gets
     * @readonly
     */
    get gets(): number;
    /**
     * @returns {number} - The number of sets
     * @readonly
     */
    get sets(): number;
    /**
     * @returns {number} - The number of deletes
     * @readonly
     */
    get deletes(): number;
    /**
     * @returns {number} - The number of clears
     * @readonly
     */
    get clears(): number;
    /**
     * @returns {number} - The vsize (value size) of the cache instance
     * @readonly
     */
    get vsize(): number;
    /**
     * @returns {number} - The ksize (key size) of the cache instance
     * @readonly
     */
    get ksize(): number;
    /**
     * @returns {number} - The count of the cache instance
     * @readonly
     */
    get count(): number;
    incrementHits(): void;
    incrementMisses(): void;
    incrementGets(): void;
    incrementSets(): void;
    incrementDeletes(): void;
    incrementClears(): void;
    incrementVSize(value: any): void;
    decreaseVSize(value: any): void;
    incrementKSize(key: string): void;
    decreaseKSize(key: string): void;
    incrementCount(): void;
    decreaseCount(): void;
    setCount(count: number): void;
    roughSizeOfString(value: string): number;
    roughSizeOfObject(object: any): number;
    reset(): void;
    resetStoreValues(): void;
}

/**
 * Converts a exspires value to a TTL value.
 * @param expires - The expires value to convert.
 * @returns {number | undefined} The TTL value in milliseconds, or undefined if the expires value is not valid.
 */
declare function getTtlFromExpires(expires: number | undefined): number | undefined;
/**
 * Get the TTL value from the cacheableTtl, primaryTtl, and secondaryTtl values.
 * @param cacheableTtl - The cacheableTtl value to use.
 * @param primaryTtl - The primaryTtl value to use.
 * @param secondaryTtl - The secondaryTtl value to use.
 * @returns {number | undefined} The TTL value in milliseconds, or undefined if all values are undefined.
 */
declare function getCascadingTtl(cacheableTtl?: number | string, primaryTtl?: number, secondaryTtl?: number): number | undefined;
/**
 * Calculate the TTL value from the expires value. If the ttl is undefined, it will be set to the expires value. If the
 * expires value is undefined, it will be set to the ttl value. If both values are defined, the smaller of the two will be used.
 * @param ttl
 * @param expires
 * @returns
 */
declare function calculateTtlFromExpiration(ttl: number | undefined, expires: number | undefined): number | undefined;

export { type CacheableItem, type CacheableStoreItem, HashAlgorithm, Stats, type StatsOptions, calculateTtlFromExpiration, coalesceAsync, getCascadingTtl, getTtlFromExpires, hash, hashToNumber, isKeyvInstance, isObject, lessThan, runIfFn, shorthandToMilliseconds, shorthandToTime, sleep };
