import { Database, Engine, RenderingManager, Scene } from "@babylonjs/core";

import { SceneManager } from "./controller/scene-manager";
import { LoginSatus } from "./controller/status/login-status";
import { StatusManager } from "./controller/status/status-manager";
import { UIManager } from "./controller/ui-manager";


export class Game {
    public canvas: HTMLCanvasElement;
    public engine: Engine;
    public scene: Scene;

    static instance: Game;

    //初始化引擎和画布
    public init(canvas: HTMLCanvasElement) {

        // FileTools.DefaultRetryStrategy = MyRetryStrategy.ExponentialBackoff(2, 1000);
        // FileTools.DefaultRetryStrategy = RetryStrategy.ExponentialBackoff(2, 1000);

        Game.instance = this;
        this.canvas = canvas;
        this.engine = new Engine(canvas, null, { stencil: true });
        Database.IDBStorageEnabled = true;//开启本地缓存
        this.scene = new Scene(this.engine);
        this.scene.useRightHandedSystem = true;//使用右手坐标系
        RenderingManager.MIN_RENDERINGGROUPS = -1;//最小渲染序列

        this.createScene();
        let scene = this.scene;
        // canvas.translate = true; //用于设置背景透明
        // scene.autoClear = true;
        UIManager.Instance.init();

        StatusManager.enterStatus<LoginSatus>(LoginSatus);

        //最后，将场景渲染出来 (重要，不可缺少)
        this.engine.runRenderLoop(function () {
            scene.render();
        })

        // 监听浏览器改变大小的事件，通过调用engine.resize()来自适应窗口大小
        window.addEventListener("resize", function () {
            if (Game.instance != null) {
                Game.instance.engine.resize();
            }

        });

    }

    //创建初始场景
    private createScene() {
        let sceneManager = SceneManager.init(this.scene, this.canvas, this.engine);
        sceneManager.initArcRotateCamera();
        sceneManager.initLight();
        sceneManager.updateSceneBG();
        sceneManager.initSceneEvent();
    }

    dispose() {
        SceneManager.Instance.dispose();
        StatusManager.dispose();
        this.scene.dispose()
        this.scene = null;
        this.engine.dispose();
        this.engine = null;
    }

}

// /**
//  * 重试策略
//  */
// var MyRetryStrategy = /** @class */ (function () {
//     function RetryStrategy() {
//     }
//     /**
//      * Function used to defines an exponential back off strategy
//      * @param maxRetries defines the maximum number of retries (3 by default)
//      * @param baseInterval defines the interval between retries
//      * @returns the strategy function to use
//      */
//     MyRetryStrategy.ExponentialBackoff = function (maxRetries, baseInterval) {
//         if (maxRetries === void 0) { maxRetries = 3; }
//         if (baseInterval === void 0) { baseInterval = 500; }
//         return function (url, request, retryIndex) {
//             if (request.status !== 0 || retryIndex >= maxRetries || url.indexOf("file:") !== -1) {
//                 return -1;
//             }
//             return Math.pow(2, retryIndex) * baseInterval;
//         };
//     };
//     return MyRetryStrategy;
// }());