import { IncomingHttpHeaders } from 'node:http';
type RawHeaders = readonly string[];
type Dict = NodeJS.Dict<string | string[]>;
type KeyOf<H, S> = keyof (H & S);
export default class IncomingHeaders<Schema extends Record<string, string | string[]> = Record<string, string | string[]>, H extends Dict = IncomingHttpHeaders> {
    #private;
    constructor(raw?: RawHeaders | Dict);
    /**
     * Gets the link associated with the current map instance.
     *
     * @return link to the internal map.
     */
    get link(): Record<string, string[]>;
    /**
     * Retrieves all stored cookies as key-value pairs.
     *
     * @return {Record<string, string>} an object containing cookie names as keys and their corresponding values.
     */
    get cookies(): Record<string, string>;
    /**
     * Retrieves the value of a cookie by its name.
     *
     * @param {string} name name of the cookie to retrieve.
     * @return {string | undefined} value of the cookie if found, or undefined if the cookie does not exist.
     */
    getCookie(name: string): string | undefined;
    /**
     * Returns an iterator for traversing the key-value pair entries stored in the internal map.
     * Each key-value pair is returned as a two-element array.
     *
     * @return {IterableIterator<[string, string]>} an iterator that yields key-value pairs as arrays.
     */
    entries(): IterableIterator<[string, string]>;
    /**
     * Returns a JSON-like object of parameters, taking the first value for each key.
     * @returns object mapping each key to its first value.
     */
    json(): Schema;
    /**
     * Checks if a given key exists in the internal map.
     *
     * @param name key to check for existence. It can either be a specific type parameter of `Schema` or any string.
     * @return {boolean} true if the key exists in the map, otherwise false.
     */
    has<T extends KeyOf<Schema, H>>(name: T | string): boolean;
    /**
     * Retrieves the first value associated with a given key.
     *
     * @param name key whose associated value needs to be retrieved.
     * @return {string | null} first value associated with the specified key if it exists, otherwise returns null.
     */
    get<T extends KeyOf<Schema, H>>(name: T): string | null;
    /**
     * Retrieves all values associated with the specified key from the internal map.
     *
     * @param name key whose associated values are to be retrieved.
     * @return {string[]} array of strings containing the values associated with the specified key.
     * Returns an empty array if no values are found.
     */
    getAll<T extends KeyOf<Schema, H>>(name: T): string[];
    /**
     * Sets or replaces the header with the given name and value.
     *
     * @param name header name (typed if using a Schema).
     * @param value header value.
     * @returns instance for chaining.
     */
    set<T extends KeyOf<Schema, H>>(name: T, value: string): this;
    /**
     * Appends a value to an existing header or creates it if absent.
     *
     * @param name header name.
     * @param value value to append.
     * @returns instance for chaining.
     */
    append<T extends KeyOf<Schema, H>>(name: T, value: string): this;
    /**
     * Deletes a header by name.
     *
     * @param name header name to delete.
     * @returns instance for chaining.
     */
    delete<T extends KeyOf<Schema, H>>(name: T): this;
}
export {};