import { EventTarget } from 'cc';

/**
 * 全局事件总线，用于模块间解耦通信。
 */
export enum GameEvents {
    GAME_START = 'GAME_START',
    GAME_PAUSE = 'GAME_PAUSE',
    GAME_RESUME = 'GAME_RESUME',
    GAME_SUCCESS = 'GAME_SUCCESS',
    GAME_DEFEAT = 'GAME_DEFEAT',
    SHOP_UPDATED = 'SHOP_UPDATED',
    BLOCK_SELECTION_OPEN = 'BLOCK_SELECTION_OPEN',
    BLOCK_SELECTION_CLOSE = 'BLOCK_SELECTION_CLOSE'
}

export default class EventBus extends EventTarget {
    private static _instance: EventBus;

    private constructor() {
        super();
    }

    public static getInstance(): EventBus {
        if (!this._instance) {
            this._instance = new EventBus();
        }
        return this._instance;
    }
}