/**
 * 加载管理器
 */
export class LoadTool {
    static s_loadingData: Map<any, string> = new Map();
    static s_loadingNum: number = 0;

    static readonly c_tag_preloadMark = "preloadMark";//预加载标绘物模型（不阻断）
    static readonly c_tag_createMark = "createMark";//创建标绘物（不阻断）
    static readonly c_tag_facilityPrefab = "facilityPrefab";//设备预制体


    /**
     * 新增加载数据
     * @param data 
     * @param tag 
     */
    static add(data: any, tag?: string) {
        switch (tag) {
            case LoadTool.c_tag_preloadMark:
            case LoadTool.c_tag_createMark: return;
        }

        let oldNum = LoadTool.s_loadingNum;
        LoadTool.s_loadingData.set(data, tag);
        LoadTool.s_loadingNum = LoadTool.s_loadingData.size;
        if (oldNum == 0 && LoadTool.s_loadingNum == 1) {
            LoadTool.onStart();
        }
    }

    /**
     * 加载完成，移除记录
     * @param data 
     */
    static remove(data: any) {
        let oldNum = LoadTool.s_loadingNum;
        if (LoadTool.s_loadingData.has(data)) {
            LoadTool.s_loadingData.delete(data);
        }
        LoadTool.s_loadingNum = LoadTool.s_loadingData.size;
        if (oldNum > 0 && LoadTool.s_loadingNum == 0) {
            LoadTool.onEnd();
        }
    }

    /**
     * 开始加载
     */
    static onStart() {
        console.log("开始加载");
        //ThreeDimensionalHomeComponent.instance.maskLayerService.sendMessage(true)
    }

    /**
     * 全部加载结束
     */
    static onEnd() {
        console.log("结束加载");
        //ThreeDimensionalHomeComponent.instance.maskLayerService.sendMessage(false)
    }

}