/**
 * The object received by the listener
 */
export type TEventKey = string | number | Symbol;

export type TListener<T> = (event?: T) => any;
export type TListenerFilter<T> = (event?: T, eventKey?: TEventKey) => any;

export interface IListenerItem<T> {
	listener: TListener<T>;
	times: number;
}

export interface TFilter<T> {
	rule: Function;
	listener: TListenerFilter<T>;
}

export type TListenersValue<T> = Array<IListenerItem<T>>;

export default interface IEventFirer<T> {
	/**
	 * listen all events whatever event key
	 */
	all: (listener: TListener<T>) => this;

	/**
	 * remove all listeners according to event key
	 */
	clearListenersByKey: (eventKey: TEventKey) => this;

	/**
	 * remove all listeners
	 */
	clearAllListeners: () => void;

	/**
	 * judge the event key and target arrording to the custom rule
	 */
	filt: (rule: Function, listener: TListener<T>) => this;

	/**
	 * fire a custom event
	 */
	fire: (eventKey: TEventKey, target: T) => this;

	/**
	 * add an event listener
	 */
	on: (eventKey: TEventKey, listener: TListener<T>) => this;

	/**
	 * delete an event listener
	 */
	off: (eventKey: TEventKey, listener: TListener<T>) => this;

	/**
	 * add an event listener and the listener only listen to the event one time
	 */
	once: (eventKey: TEventKey, listener: TListener<T>) => this;

	/**
	 * add an event listener and the listener listen to the event several times
	 */
	times: (eventKey: TEventKey, times: number, listener: TListener<T>) => this;
}