import { _decorator, Component, director, game } from 'cc';
import { NetworkManager } from './NetworkManager';
import { ConfigManager } from './ConfigManager';

const { ccclass, property } = _decorator;

/**
 * GameManager 全局单例
 * 负责场景切换、全局状态持有、核心管理器初始化。
 */
@ccclass('GameManager')
export class GameManager extends Component {
    private static _instance: GameManager | null = null;

    public static getInstance(): GameManager {
        if (!GameManager._instance) {
            // 运行时将由 LoginScene 挂载的节点负责创建
            console.warn('GameManager not mounted yet');
        }
        return GameManager._instance!;
    }

    @property({ type: NetworkManager })
    public networkManager: NetworkManager | null = null;

    @property({ type: ConfigManager })
    public configManager: ConfigManager | null = null;

    public playerId: string = '';
    public characterId: string = '';
    public nakamaToken: string = '';

    onLoad() {
        if (GameManager._instance === null) {
            GameManager._instance = this;
            game.addPersistRootNode(this.node);
        } else {
            this.destroy();
            return;
        }

        this.networkManager = this.networkManager ?? this.getComponent(NetworkManager);
        this.configManager = this.configManager ?? this.getComponent(ConfigManager);
    }

    /**
     * 切换场景
     */
    public switchScene(sceneName: string): void {
        director.loadScene(sceneName);
    }

    /**
     * 登录后设置身份凭证
     */
    public setAuth(playerId: string, characterId: string, token: string): void {
        this.playerId = playerId;
        this.characterId = characterId;
        this.nakamaToken = token;
    }

    /**
     * 获取当前角色 ID
     */
    public getCharacterId(): string {
        return this.characterId;
    }

    onDestroy() {
        if (GameManager._instance === this) {
            GameManager._instance = null;
        }
    }
}