export default class gameToast {
    private static instance: gameToast = null;
    private showObj: cc.Node = null;
    private scheduleObj = null;
    private callback = null;

    private constructor() { }

    public static getInstance(): gameToast {
        if (gameToast.instance === null) {
            gameToast.instance = new gameToast();
        }
        return gameToast.instance;
    }

    /**
     * 显示toast
     * @param content 显示的内容
     * @param time 清除的时间
     * @param callback 清除时候回调
     */
    public show(parent:cc.Node, content: string, time: number, callback: Function, target:cc.Component) {

        this.callback = callback;
        if(this.showObj){
            this.showObj.parent = parent;
            let DetailLabel = this.showObj.getChildByName('DetailLabel');
            DetailLabel.getComponent(cc.Label).string = content;
            this.scheduleObj = null;
            target.unschedule(this.scheduleObj);
            this.scheduleObj = target.scheduleOnce(() => {
                if (callback) {
                    callback();
                    this.callback = null;
                }
                this.showObj.destroy();
                this.showObj = null;
            }, time);
        }else{
            cc.loader.loadRes("prefab/gameToast", function (err, texture) {
                this.showObj = cc.instantiate(texture);
                this.showObj.parent = parent;
                let DetailLabel = this.showObj.getChildByName('DetailLabel');
                DetailLabel.getComponent(cc.Label).string = content;
    
                this.scheduleObj = target.scheduleOnce(() => {
                    if (callback) {
                        callback();
                        this.callback = null;
                    }
                    this.showObj.destroy();
                    this.showObj = null;
                }, time);
            }.bind(this));
        }

    }

    public hide(target:cc.Component) {
        if (this.showObj) {
            if(this.callback){
                this.callback();
            }
            this.scheduleObj = null;
            target.unschedule(this.scheduleObj);
        }
        this.callback = null;
        this.showObj.destroy();
        this.showObj = null;
    }
}