import { _decorator, Component, Node, Prefab, LayoutComponent, instantiate, ScrollViewComponent } from 'cc';
import { GUIManager } from '../../../engines/gui/GUIManager';
import { GUIMediator } from '../../../engines/gui/GUIMediator';
import GameConfigManager from '../../models/GameConfigManager';
import { UIConst } from '../UIConst';
import { ShopItemRenderScript } from './ShopItemRenderScript';
const { ccclass, property } = _decorator;

@ccclass('ShopMediator')
export class ShopMediator extends GUIMediator {

    @property({
        type:Prefab
    })
    ListItemRenderPrefab:Prefab=null;


    @property({
        type:LayoutComponent
    })
    ListContext:LayoutComponent=null;

    @property({
        type:ScrollViewComponent
    })
    List:ScrollViewComponent=null;


    OnShow(data?:any):void{
        super.OnShow(data);
        this.RefreshList(true);
        this.AddEvent();
    }

    OnHide():void{
        this.RemoveEvent();
    }

    /**
     * 返回按钮点击
     */
    public BackButtonClick():void{
        GUIManager.single.Show(UIConst.PREPARE_UI);
        this.HideSelf();
    }

    private AddEvent():void{

    }

    private RemoveEvent():void{

    }

    private RefreshList(srollToZ:boolean):void{
        let itemView:Node;
        if(GameConfigManager.ShopList.length!=this.ListContext.node.children.length){
            if(GameConfigManager.ShopList.length<this.ListContext.node.children.length){
                //删除多余的
                while(GameConfigManager.ShopList.length<this.ListContext.node.children.length){
                    this.ListContext.node.removeChild(this.ListContext.node.children[0]);
                }
            }else{
                //添加缺少的
                while(GameConfigManager.ShopList.length>this.ListContext.node.children.length){
                    itemView=instantiate(this.ListItemRenderPrefab);
                    this.ListContext.node.addChild(itemView);
                }
            }
        }
        let itemScript:ShopItemRenderScript;
        let count:number=GameConfigManager.ShopList.length;
        for (let index = 0; index < count; index++) {
            itemView=this.ListContext.node.children[index];
            itemScript=itemView.getComponent(ShopItemRenderScript);
            if(itemScript==null){
                throw new Error("商城列表项未挂载ShopItemRenderScript脚本!");
            }
            itemScript.UpdateItemRender(GameConfigManager.ShopList[index]);
        }
        if(srollToZ){
            this.List.scrollToTop(0.1);
        }
    }

    start () {
        // Your initialization goes here.
    }

    // update (deltaTime: number) {
    //     // Your update function goes here.
    // }
}