// UI
class UIMgr{
    constructor() {
        console.log('UIMgr初始化');
        this.recordList = {};
        this.popupList = [];
    }

    openUI(path, callBack){
        let arr = path.split('/');
        let key = arr[arr.length - 1];

        if(key != 'TipsLayer')
            this.showWait();
        cc.resources.load(path, function(err, prefab){
            if(err){
                console.log('加载界面出错: ', path);
                return;
            }
            this.hideWait();
            if(cc.isValid(this.recordList[key])){
                console.log("弹框已加载: ", key);
                if (callBack)
                    callBack(this.recordList[key]);
                return;
            }
            let pf = cc.instantiate(prefab);
            let layer = cc.director.getScene();
            pf.parent = layer;
            pf.name = key;
            this.setLayerIndex(pf);
            this.recordList[key] = pf;
            this.popupList.push({name: key, node: pf});
            if(callBack)
                callBack(pf);
        }.bind(this));
    }

    setLayerIndex(target){
        let tName = target.name;
        if(tName == 'TipsLayer'){
            target.zIndex = 100 + this.popupList.length;
        }else{
            // target.zIndex = 200 + this.popupList.length;
        }
    }

    clearPopupList(){
        this.popupList = [];
    }

    getPopupNums() {
        console.log('getPopupNums: ', this.popupList);
        return this.popupList.length;
    }

    closeUI(key, bDestroy=true){
        for(let i=0; i < this.popupList.length; i++){
            let item = this.popupList[i];
            if(item.name == key){
                if(bDestroy){
                    if(cc.isValid(item.node)){
                        item.node.destroy();
                    }
                }
                this.popupList.splice(i, 1);
                break;
            }
        }
        delete this.recordList[key];
    }

    closeAllUI(){
        for(let i=0; i < this.popupList.length; i++){
            let item = this.popupList[i];
            if (cc.isValid(item.node)) {
                item.node.destroy();
            }
        }
        this.popupList = [];
        this.recordList = {};
    }

    // --------  wait  --------
    showWait(callBack = null){
        let waitNode = cc.find('WaitNodeLayer');
        if(waitNode)
            waitNode.getComponent('WaitNodeLayer').showWait(callBack);
    }

    hideWait(){
        let waitNode = cc.find('WaitNodeLayer');
        if(waitNode)
            waitNode.getComponent('WaitNodeLayer').hideWait();
    }

}

let instance = null;
UIMgr.getInstance = function(){
    if(!instance){
        instance = new UIMgr();
    }
    return instance;
}

export default UIMgr.getInstance();