import { Ability as Processable } from "@typescript-package/state";
import { Processing } from "./processing.class";
import { ErrorCallback, ProcessCallback } from "../type";
/**
 * @description A class designed to manage and execute a collection of asynchronous tasks with concurrently control or synchronous tasks.
 * @export
 * @class Tasks
 * @template Type
 * @extends {Processable}
 */
export declare class Tasks<Type = any, Concurrency extends number = number> extends Processable {
    #private;
    /**
     * @description The maximum number of elements that can be processed concurrently.
     * @public
     * @readonly
     * @type {Concurrency}
     */
    get concurrency(): Concurrency;
    /**
     * @description Returns the processed elements.
     * @public
     * @readonly
     * @type {Set<Type>}
     */
    get processed(): Set<Type>;
    /**
     * @description Returns the `Processing` object that contains active tasks.
     * @public
     * @readonly
     * @type {Processing<Type, Concurrency>}
     */
    get processing(): Processing;
    /**
     * Creates an instance of `Tasks`.
     * @constructor
     * @param {Concurrency} concurrency
     */
    /**
     * Creates an instance of `Tasks`.
     * @constructor
     * @param {boolean} enabled Enable initially `Tasks` functionality.
     * @param {Concurrency} concurrency The maximum number of elements that can be processed concurrently.
     */
    constructor(enabled: boolean, concurrency: Concurrency);
    /**
     * @description Set the `Tasks` to debug state.
     * @public
     */
    debug(): this;
    /**
     * @description Runs asynchronous single processing on the `element`.
     * @public
     * @async
     * @param {Type} element The element to process.
     * @param {ProcessCallback<Type>} callbackFn The callback function to process the element.
     * @param {ErrorCallback<Type>} [onError] An optional error handler.
     * @returns {Promise<void>}
     */
    asyncProcess(element: Type, callbackFn: ProcessCallback<Type>, onError?: ErrorCallback<Type>, onProcessed?: ProcessCallback<Type>): Promise<void>;
    /**
     * @description Starts asynchronous processing elements with concurrency control.
     * @public
     * @async
     * @param {Iterable<Type>} elements The elements to process.
     * @param {ProcessCallback<Type>} callbackFn The function to process each element.
     * @param {?ErrorCallback<Type>} [onError] An optional error handler.
     * @param {('default' | 'race')} [method='default']
     * @returns {Promise<void>}
     */
    asyncRun(elements: Iterable<Type>, callbackFn: ProcessCallback<Type>, onError?: ErrorCallback<Type>, onProcessed?: ProcessCallback<Type>, method?: 'all' | 'default' | 'race'): Promise<Set<Type>>;
    /**
     * @description Runs a synchronous processing on the provided `element` using the `callbackFn`.
     * If an `onError` callback is provided, it will handle any errors encountered during processing.
     * @param {(Type | undefined)} element The element to be processed.
     * @param {ProcessCallback<Type>} callbackFn A function that processes the element synchronously.
     * @param {?ErrorCallback<Type>} [onError] An optional callback function to handle errors during processing.
     * @returns {this} The current instance for method chaining.
     */
    process(element: Type | undefined, callbackFn: ProcessCallback<Type>, onError?: ErrorCallback<Type>, onProcessed?: ProcessCallback<Type>): this;
    /**
     * @description Runs the provided `callbackFn` synchronously on each element in the `elements` iterable.
     * If an `onError` callback is provided, it will handle errors encountered during processing.
     * @public
     * @param {Iterable<Type>} elements An iterable collection of elements to be processed.
     * @param {ProcessCallback<Type>} callbackFn A function that will process each element synchronously.
     * @param {?ErrorCallback<Type>} [onError] Optional callback for handling errors that occur during processing.
     */
    run(elements: Iterable<Type>, callbackFn: ProcessCallback<Type>, onError?: ErrorCallback<Type>, onProcessed?: ProcessCallback<Type>): void;
    /**
     * @description Unset the `Tasks` from debug state.
     * @public
     */
    unDebug(): this;
}