import { _decorator, Component, EventTarget, Node } from 'cc';
import GameEvent from '../Enum/GameEvent';
const { ccclass, property } = _decorator;

@ccclass('EventManger')
export class EventManger extends Component {
    //singleton
    private static _instance: EventManger = null;
    public static get instance(): EventManger {
        if (!EventManger._instance) {
            EventManger._instance = new EventManger('EventManger');
        }
        return EventManger._instance;
    }

    private _eventTarget = new EventTarget();

    onLoad() {
        if (!EventManger._instance) {
            EventManger._instance = this;
        }
    }

    public on(eventType: GameEvent, callback?: (...args: any[]) => void, thisArg?: any) {
        this._eventTarget.on(eventType, callback, thisArg);
    }

    public off(eventType: GameEvent, callback?: (...args: any[]) => void, thisArg?: any) {
        this._eventTarget.on(eventType, callback, thisArg);
    }

    public emit(eventType: GameEvent, arg0?: any, arg1?: any, arg2?: any, arg3?: any, arg4?: any) {
        this._eventTarget.emit(eventType, arg0, arg1, arg2, arg3, arg4);
    }
}