/**
 * From typed-emitter
 * https://npm.im/typed-emitter
 */

/** @hidden */
export type Arguments<T> = [T] extends [(...args: infer U) => any] ? U : [T] extends [void] ? [] : [T];

/**
 * Type-safe event emitter.
 * @hidden
 */
export default interface TypedEventEmitter<Events> {
  /** @hidden */
  addListener<E extends keyof Events>(event: E, listener: Events[E]): this;
  /** @hidden */
  on<E extends keyof Events>(event: E, listener: Events[E]): this;
  /** @hidden */
  once<E extends keyof Events>(event: E, listener: Events[E]): this;
  /** @hidden */
  prependListener<E extends keyof Events>(event: E, listener: Events[E]): this;
  /** @hidden */
  prependOnceListener<E extends keyof Events>(event: E, listener: Events[E]): this;

  /** @hidden */
  off<E extends keyof Events>(event: E, listener: Events[E]): this;
  /** @hidden */
  removeAllListeners<E extends keyof Events>(event?: E): this;
  /** @hidden */
  removeListener<E extends keyof Events>(event: E, listener: Events[E]): this;

  /** @hidden */
  emit<E extends keyof Events>(event: E, ...args: Arguments<Events[E]>): boolean;
  /** @hidden */
  eventNames(): (keyof Events | string | symbol)[];
  /** @hidden */
  rawListeners<E extends keyof Events>(event: E): Function[];
  /** @hidden */
  listeners<E extends keyof Events>(event: E): Function[];
  /** @hidden */
  listenerCount<E extends keyof Events>(event: E): number;

  /** @hidden */
  getMaxListeners(): number;
  /** @hidden */
  setMaxListeners(maxListeners: number): this;
}