import type { AnyFunc } from "../utils/basic.js";
export type EventBusListener<T = any, P = any> = (event: T, payload?: P) => void;
export type EventBusEvents<T, P = any> = Set<EventBusListener<T, P>>;
export type EventBusIdentifier = symbol | string | number;
export interface UseEventBusReturns<T, P> {
    /**
     * Subscribe to an event. When calling emit, the listeners will execute.
     *
     * @param listener watch listener.
     * @returns a stop function to remove the current callback.
     */
    on: (listener: EventBusListener<T, P>) => AnyFunc;
    /**
     * Similar to `on`, but only fires once
     *
     * @param listener watch listener.
     * @returns a stop function to remove the current callback.
     */
    once: (listener: EventBusListener<T, P>) => AnyFunc;
    /**
     * Emit an event, the corresponding event listeners will execute.
     *
     * @param event data sent.
     */
    emit: (event?: T, payload?: P) => void;
    /**
     * Remove the corresponding listener.
     *
     * @param listener watch listener.
     */
    off: (listener: EventBusListener<T>) => void;
    /**
     * Clear all events in global scope
     */
    reset(): void;
    /**
     * Clear all listeners in the current component context
     */
    cleanup(): void;
}
export interface UseEventBusOptions {
    /**
     * Whether to automatically clean up the listener when the component is unmounted.
     *
     * @defaultValue true
     */
    autoCleanup?: boolean;
}
export declare const events: Map<EventBusIdentifier, EventBusEvents<any>>;
/**
 * A React Hook that provides a simple event bus for your application.
 *
 * TODO: add a hooks to consume event (auto release when unmount)
 */
export declare function useEventBus<T = any, P = any>(key: EventBusIdentifier, options?: UseEventBusOptions): UseEventBusReturns<T, P>;