import { _decorator, Sprite, SpriteFrame} from 'cc';
import { ch } from '../../ch/ch';

class HeadIcon {
    private _map:Map<string,SpriteFrame>=new Map();
    private _map_uid:Map<Sprite,string>=new Map();
    constructor(){
    }
    public async showIcon(uid:string,remoteUrl:string,sp:Sprite=null,def?:SpriteFrame):Promise<SpriteFrame>{
        if(!remoteUrl || remoteUrl=="image"){
            if(sp)sp.spriteFrame=def;
            return;
        }
        if(this._map.has(uid)){
            const spr=this._map.get(uid);
            if(sp)sp.spriteFrame=spr;
            return spr;
        }else{
            const map=this._map;
            const map_uid=this._map_uid;
            if(sp && sp.isValid ) map_uid.set(sp,uid);
            const spriteFrame = await ch.util.loadImage(remoteUrl);
            if(sp && sp.isValid )if(map_uid.get(sp)==uid)sp.spriteFrame=spriteFrame;
            map.set(uid,spriteFrame);
            return spriteFrame;
        }
    }
    public clean():void{
        this._map.clear();
        this._map_uid.clear();
    }
}
export default function get_new_head_icon():HeadIcon { return new HeadIcon();}