declare var mitt: mitt.MittStatic;

declare module "mitt" {
    export = mitt;
}

declare namespace mitt {
	type Handler = (event?: any) => void;
	type WildcardHandler = (type?: string, event?: any) => void;

	interface MittStatic {
		(all?: {[key: string]: Array<Handler>}): Emitter;
	}

	interface Emitter {
		/**
		 * Register an event handler for the given type.
		 *
		 * @param {string} type Type of event to listen for, or `"*"` for all events.
		 * @param {Handler} handler Function to call in response to the given event.
		 *
		 * @memberOf Mitt
		 */
		on(type: string, handler: Handler): void;
		on(type: "*", handler: WildcardHandler): void;

		/**
		 * Function to call in response to the given event
		 *
		 * @param {string} type Type of event to unregister `handler` from, or `"*"`
		 * @param {Handler} handler Handler function to remove.
		 *
		 * @memberOf Mitt
		 */
		off(type: string, handler: Handler): void;
		off(type: "*", handler: WildcardHandler): void;

		/**
		 * Invoke all handlers for the given type.
		 * If present, `"*"` handlers are invoked prior to type-matched handlers.
		 *
		 * @param {string} type The event type to invoke
		 * @param {any} [event] An event object, passed to each handler
		 *
		 * @memberOf Mitt
		 */
		emit(type: string, event?: any): void;
	}
}