import { Node,NodePool, Prefab, instantiate} from "cc";
/** node对象池 */
class PrefabPool {
     private  _pools:Map<string,NodePool>= new Map();
     private  _node:Node;
     constructor(){
        if(this._node==null){
             this._node=new Node();
             this._node.active=false;
          }
     }
     private getPool(path:string):NodePool{
        let pool= this._pools.get(path);
        if(pool==null){
            pool= new NodePool();
            this._pools.set(path,pool);
        }
        return pool;
    }
    public GetNode(p:Prefab):Node{
            let pool= this.getPool(p.name);
            let node = pool.get();
            if (!node){ 
                node = instantiate (p);
                node.name=p.name;
            }
            return node;
     }
     public RecNode(node:Node):void{
          node.parent=this._node;
          this.getPool(node.name).put(node);
     }
     public InitPool(p:Prefab,n:number=10):void{
          let pool= this.getPool(p.name);
          for(let i=0;i<n;i++){
              let node = instantiate (p);
              node.name=p.name;
              node.parent=this._node;
              pool.put(node);
          }
    }
    public  Clear():void{
        if(!this._node)return;
        this._node.removeAllChildren();
        this._pools.forEach((v,k)=>{
            v.clear();
        })
        this._pools.clear();
   }
    public getAllPoolNames(): string[] {
       return Object.keys(this._pools);
    }
    public getPoolSize(poolName: string): number {
        const pool = this._pools[poolName];
        if (pool) {
           return pool.size();
        }
        return 0;
    }
}
export default function get_new_prefab_pool():PrefabPool { return new PrefabPool();}