/**
 * Signal by Igor Bloom
 * Copyright (C) 2014-2023
 *
 * An implementation of a signaling mechanism used to connect components and transfer data between them.
 *
 * How to use:
 *
 * Create an instance of Signal with string data type:
 * export const S_TEST:Signal<string>=new Signal();
 *
 * Subscribe to signal, with id: test1
 * S_TEST.subscribe(str=>{console.log(str)},"test1")
 *
 * Call invokation procedure
 * S_TEST.invoke("test");
 *
 * Remove subscribtion, using id:
 * S_TEST.remove("test1")
 *
 * Remove all subscribtions from signal:
 * S_TEST.clear();
 *
 */
import { Binder } from "./Binder";
import { DataProvider } from "./DataProvider";
export { Binder, DataProvider };
export declare class Signal<T> {
    static nextID: number;
    private busy;
    private tempAdd;
    private tempRem;
    private tempInvoke;
    private callbacks;
    private tempClear;
    name: string;
    type: "signal" | "request" | "binder";
    onSubscribe?: (callback?: (data: T) => void) => void;
    static onLog?: (signal: Signal<any>, level: number, text: string) => void;
    private static reactUseState;
    private static reactUseEffect;
    /**
     * Setup react hook before using it
     * @param useState - reference to react useState
     * @param useEffect - reference to react useEffect
     */
    static setupReact(useState: any, useEffect: any): void;
    /**
     * Use signal as react hook
     * @param group string or Signal
     * @param deps array of dependencies for react useEffect hook
     * @param onInvoke callback, invokes when signalling data
     * @returns
     */
    static useSignal<T>(group?: string | Signal<any>, deps?: any[], onInvoke?: (data?: T | null) => void): T | null;
    /**
     * Create signal instance
     * @param name @optional, signal name
     * @param onSubscribe @optional, callback, fires when someone subscribe to signal
     * @param onLog @optional, onLog callback, with level:number and text:string.
     */
    constructor(name?: string, onSubscribe?: (callback?: (data: T) => void) => void, handler?: (data: T) => void);
    /**
     * Subscribe to signal
     * @param callback will be called when the signal is invoked.
     * @param id Optional parameter, callback identificator
     * @returns id as string
     */
    subscribe(callback: (data: T) => void, id?: string): string;
    /**
     * Use signal as react webhook, be sure to call Signal.setupReact(useState,useEffect) before.
     * @optional @param dependensies - array of dependensies to use with useEffect hook,
     * @example const test = S_TEST.use(); // when signal invokes, variable test will receive signalling data
     * @returns dataobject with type <T>, or null
     */
    use(dependensies?: any[], onInvke?: (data?: T | null) => void): T | null;
    /**
     * Get list of ids of subscribtions
     * @returns array of subscribtion's ids
     */
    getSubscribtions(): string[];
    /**
     * Removes all subscriptions to a signal
     * @returns void
     */
    removeAll(): void;
    /**
     * Remove subscribtion from signal
     * @param id @optional uses to identify and find callback to remove
     * @returns true if succsess
     */
    unsubscribe(id: string): boolean;
    /**
     * Invoke signal, all callback will be called with providen data
     * @param data Data Object passes to each callback
     * @returns void
     */
    invoke(data: T): void;
}
/**
 * Uses to handle signal subscribtions
 * add and remove callbacks from/to signals
 * clear all signals in handler
 */
export declare class SignalHandler {
    static nextID: number;
    private id;
    private signals;
    constructor();
    /**
     * Add to Signal or group of signals callback
     * @param signal Array of Signals or Signal
     * @param cb callback to add to signal or to array of signals
     * @returns void
     */
    add<T>(signal: (Signal<T>) | Signal<T>[], cb: (data: T) => void): void;
    /**
     * Clear all subscribtions with all signals in handler
     */
    clear(): void;
}
export declare class Req<T, K> {
    private static reactUseState;
    private static reactUseEffect;
    /**
     * Setup react hook before using it
     * @param useState - reference to react useState
     * @param useEffect - reference to react useEffect
     */
    static setupReact(useState: any, useEffect: any): void;
    private static nextID;
    private worker?;
    name: string;
    type: "signal" | "request" | "binder";
    constructor(worker?: (request: T) => Promise<K>, name?: string);
    request(data: T): Promise<K>;
    /**
     * React hook for Req
     * @param request Request data <T>
     * @param dep  dependecies for useEffect
     * @param onChange invokes when Req change it value
     * @returns data <K>
     */
    use(request: T, dep?: any[], onChange?: (data?: K | null) => void): K | null;
    /**
     * React hook for Req, with initial value and ability to change value directly from component
     * @param request Request data <T>
     * @param dep dependencies for useEffect
     * @param initialValue initial value
     * @param onChange invokes when Req change it value
     * @returns array, first item stored value, second item - callback to reset in hook req.value
     */
    useValue(request: T, onChange?: (data?: K | null) => void, dep?: any[]): [K | null, (value: K) => void];
    /**
     * Complete Request hook <T,K>
     * @param onChange - will fire when data available in request
     * @param initialRequest - intial T request param
     * @returns array: 0 - available request data, 1 - callback to execute request (T), 2 - callback to reset available request data (K), 3 - Busy indicator, a boolean value, true when Request gathering data, false - when request completed
     */
    useRequest(onChange?: ((data?: K | null) => void) | null, initialRequest?: T): [K | null, (value: T) => void, (value: K) => void, boolean];
    set listener(_listener: (request: T) => Promise<K>);
}
/**
 * Subscribe to signalling group, using type to define group. Be sure to unsubscribe in time.
 * @param callback  callback function, will be called when signal invoking
 * @param group     Signal group
 * @returns         callback id, use it to unsubscribe
 */
export declare function s_subscribe(callback: (data?: any) => void, group?: string): string;
/**
 * Subscribe to signalling group for once, after callback fires, unsubscribe automatically
 * @param callback
 * @param group @optional Signal group, if empty, will use global signalling pipe
 * @returns void
 */
export declare function s_subscribeOnce(callback: (data?: any) => void, group?: string): void;
/**
 * Unsubscribe from signal group by callback id
 * @param id callback id
 * @returns true if success
 */
export declare function s_unsubscribe(id: string): boolean;
/**
 * Invoke all callback in signal
 * @param data Data object passes to each callback
 * @param group Signal group, if empty, fill invoke on global signalling pipeline
 * @returns void
 */
export declare function s_invoke(data: any, group?: string): void;
/**
 * Invoke all callback in signal and remove all of them after invokation.
 * @param data Data object passes to each callback
 * @param group Signal group, if empty, fill invoke on global signalling pipeline
 * @returns void
 */
export declare function s_invokeOnce(data: any, group?: string): void;
/**
* Clear all callbacks in Signalling group
* @param    group Signal group
* @returns
*/
export declare function s_removeAll(group?: string): void;
/**
 * Destroy all signal types
 */
export declare function s_destroy(): void;
export declare function useSignal<T>(group?: string | Signal<any>): T | null | undefined;
export default Signal;