import type { EventType, Handler, WildcardHandler } from "./mitt";

import mitt from "./mitt";

const emitter = mitt();

interface EventBus {
	/** 发布事件 */
	publish(type: "*", event?: any): void;
	/** 发布事件 */
	publish<T = any>(type: EventType, event?: T): void;

	/** 订阅事件 */
	subscribe(type: "*", handler: WildcardHandler): void;
	/** 订阅事件 */
	subscribe<T = any>(type: EventType, handler: Handler<T>): void;

	/** 退订事件 */
	unSubscribe(type: "*", handler: WildcardHandler): void;
	/** 退订事件 */
	unSubscribe<T = any>(type: EventType, handler: Handler<T>): void;
}

export function useEventBus(): EventBus {
	return {
		publish: emitter.emit,
		subscribe: emitter.on,
		unSubscribe: emitter.off,
	};
}