import { EventTarget } from 'cc';

/**
 * 全局事件总线，用于模块间解耦通信。
 */
export enum GameEvents {
    // 游戏状态事件
    GAME_START = 'GAME_START',
    GAME_PAUSE = 'GAME_PAUSE',
    GAME_RESUME = 'GAME_RESUME',
    GAME_SUCCESS = 'GAME_SUCCESS',
    GAME_DEFEAT = 'GAME_DEFEAT',
    
    // 游戏重置事件
    GAME_RESTART = 'GAME_RESTART',
    GAME_RESET_REQUEST = 'GAME_RESET_REQUEST',
    GAME_RESET_COMPLETE = 'GAME_RESET_COMPLETE',
    
    // 组件重置事件
    RESET_GAME_MANAGER = 'RESET_GAME_MANAGER',
    RESET_ENEMY_CONTROLLER = 'RESET_ENEMY_CONTROLLER',
    RESET_BALL_CONTROLLER = 'RESET_BALL_CONTROLLER',
    RESET_BLOCK_MANAGER = 'RESET_BLOCK_MANAGER',
    RESET_BLOCK_SELECTION = 'RESET_BLOCK_SELECTION',
    RESET_WALL_HEALTH = 'RESET_WALL_HEALTH',
    RESET_GAME_PAUSE = 'RESET_GAME_PAUSE',
    RESET_UI_STATES = 'RESET_UI_STATES',
    RESET_ENERGY_SYSTEM = 'RESET_ENERGY_SYSTEM',
    
    // 游戏对象清理事件
    CLEAR_ALL_BULLETS = 'CLEAR_ALL_BULLETS',
    CLEAR_ALL_ENEMIES = 'CLEAR_ALL_ENEMIES',
    CLEAR_ALL_GAME_OBJECTS = 'CLEAR_ALL_GAME_OBJECTS',
    
    // UI事件
    UPGRADE_UPDATED = 'UPGRADE_UPDATED',
    RETURN_TO_MAIN_MENU = 'RETURN_TO_MAIN_MENU',
    CURRENCY_CHANGED = 'CURRENCY_CHANGED',
    UI_PANEL_SWITCHED = 'UI_PANEL_SWITCHED',
    APP_STATE_CHANGED = 'APP_STATE_CHANGED',
    
    // UI状态切换事件（根据游戏管理文档）
    ENTER_BATTLE_PREPARATION = 'ENTER_BATTLE_PREPARATION',  // 进入备战阶段
    ENTER_PLAYING_STATE = 'ENTER_PLAYING_STATE',            // 进入游玩状态
    ENTER_GAME_END_STATE = 'ENTER_GAME_END_STATE',          // 进入游戏结束状态
    
    // 敌人控制事件（保留实际使用的事件）
    
    // 墙体事件
    WALL_HEALTH_CHANGED = 'WALL_HEALTH_CHANGED',
    WALL_DESTROYED = 'WALL_DESTROYED',
    WALL_TAKE_DAMAGE = 'WALL_TAKE_DAMAGE',
    
    // 球控制事件
    BALL_CREATE = 'BALL_CREATE',
    BALL_START = 'BALL_START',
    BALL_CREATE_ADDITIONAL = 'BALL_CREATE_ADDITIONAL',
    BALL_FIRE_BULLET = 'BALL_FIRE_BULLET',
    
    // 敌人控制事件
    ENEMY_GET_NEAREST = 'ENEMY_GET_NEAREST',
    ENEMY_UPDATE_COUNT = 'ENEMY_UPDATE_COUNT',
    ENEMY_SPAWNING_STARTED = 'ENEMY_SPAWNING_STARTED',
    ENEMY_SPAWNING_STOPPED = 'ENEMY_SPAWNING_STOPPED',
    
    // 伤害事件
    APPLY_DAMAGE_TO_ENEMY = 'APPLY_DAMAGE_TO_ENEMY',
    BURN_EFFECT_ENDED = 'BURN_EFFECT_ENDED',


    ENEMY_START_WAVE = 'ENEMY_START_WAVE',
    ENEMY_START_GAME = 'ENEMY_START_GAME',
    ENEMY_SHOW_START_WAVE_PROMPT = 'ENEMY_SHOW_START_WAVE_PROMPT',
    
    // 游戏状态检查事件
    GAME_CHECK_OVER = 'GAME_CHECK_OVER',
    

    
    // 方块生成事件
    GENERATE_BLOCKS = 'GENERATE_BLOCKS',
    WAVE_COMPLETED = 'WAVE_COMPLETED',
    SETUP_BLOCK_DRAG_EVENTS = 'SETUP_BLOCK_DRAG_EVENTS',
    
    // 子弹事件
    BULLET_CREATE_REQUEST = 'BULLET_CREATE_REQUEST',
    BULLET_HIT_ENEMY = 'BULLET_HIT_ENEMY',
    
    // 方块拖拽事件
    BLOCK_DRAG_START = 'BLOCK_DRAG_START',
    BLOCK_DRAG_END = 'BLOCK_DRAG_END',
    
    // Toast提示事件
    SHOW_TOAST = 'SHOW_TOAST',
    HIDE_TOAST = 'HIDE_TOAST',
    
    // 资源不足Toast事件
    SHOW_RESOURCE_TOAST = 'SHOW_RESOURCE_TOAST',
    HIDE_RESOURCE_TOAST = 'HIDE_RESOURCE_TOAST'
}

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;
    }

}