import SScript from "./SScript";
import Sprite = Laya.Sprite;
import Node = Laya.Node;
import UIComponent = Laya.UIComponent;

export default class SContainer extends SScript{
    private _backgroundImg: UIComponent;
    private _paddingBottom: number = 0;
    private _paddingRight: number = 0;

    onAwake(){
        let o:UIComponent = this.owner as UIComponent;
        this._backgroundImg = o.getChildByName('bg') as UIComponent;
        if(this._backgroundImg)this._backgroundImg.left = this._backgroundImg.right = this._backgroundImg.top = this._backgroundImg.bottom = 0;
        let origiAddChild:Function = o.addChild;
        let addResizeListener = (child:Node)=>{
            child.on(Laya.Event.RESIZE, this, this._prepareToRefresh);
        };
        let removeResizeListener = (child:Node)=>{
            child.off(Laya.Event.RESIZE, this, this._prepareToRefresh);
        };

        o.addChild = function(child:Node):Node{
            if (!child || this.destroyed || child===this)return child;
            addResizeListener(child);
            return origiAddChild.call(this, child);
        };

        let origiAddChildAt = o.addChildAt;
        o.addChildAt = function(child:Node, index:number):Node{
            if (!child || this.destroyed || child===this)return child;
            addResizeListener(child);
            return origiAddChildAt.call(this, child, index);
        }

        let origiRemoveChildAt = o.removeChildAt;
        o.removeChildAt = function(index:number):Node{
            removeResizeListener(this.getChildAt(index));
            return origiRemoveChildAt.call(this, index);
        }

        for(let i = 0; i < o.numChildren; i++)
        {
            let child = o.getChildAt(i);
            if(child != this._backgroundImg)
            {
                addResizeListener(child);
            }
        }

        this._refreshSize();
    }

    measureWidth():number{
        var max=0;
        let o:Sprite = this.owner as Sprite;
		for (var i=o.numChildren-1;i >-1;i--){
			var comp = o.getChildAt(i) as Sprite;
			if (comp.visible && comp != this._backgroundImg){
				max=Math.max(comp._x+comp.width *comp.scaleX,max);
			}
		}
		return max;
    }

    measureHeight():number{
        var max=0;
        let o:Sprite = this.owner as Sprite;
		for (var i=o.numChildren-1;i >-1;i--){
			var comp = o.getChildAt(i) as Sprite;
			if (comp.visible && comp != this._backgroundImg){
				max=Math.max(comp._y+comp.height *comp.scaleY,max);
			}
		}
		return max;
    }

    private _prepareToRefresh(){
        let o:UIComponent = this.owner as UIComponent;
        if(o)o.callLater(this._refreshSize.bind(this));
    }

    private _refreshSize(){
        let o:UIComponent = this.owner as UIComponent;
        o.width = this.measureWidth() + this._paddingRight;
        o.height = this.measureHeight() + this._paddingBottom;
    }

    /** @prop {name:paddingBottom, tips:"设置下边距", type:number} */
    get paddingBottom()
    {
        return this._paddingBottom;
    }
    
    set paddingBottom(v:number)
    {
        if(this._paddingBottom != v){
            this._paddingBottom = v;
            this._prepareToRefresh();
        }
    }

    /** @prop {name:paddingRight, tips:"设置右边距", type:number} */
    get paddingRight()
    {
        return this._paddingRight;
    }
    
    set paddingRight(v:number)
    {
        if(this._paddingRight != v){
            this._paddingRight = v;
            this._prepareToRefresh();
        }
    }
}