import * as ByteBuffer from "../3rd/bytebuffer";
import SKSocket from "./SKSocket";

export default class SKPacket{

    prefix:string;

    constructor(){
    }

    static create(prefix:string):SKPacket{
        let packet=new SKPacket();
        packet.prefix=prefix;
        return packet;
    }

    encode(properties:any):any{
        let msg=SKSocket.pbroot.lookupType(`${SKSocket.pbname}.${this.prefix}`);
        if(!msg){
            return;
        }
        let packet=msg.create(properties);
        let body:Uint8Array=msg.encode(packet).finish();
        if(!body){
            return;
        }
        let buffer=new ByteBuffer();
        buffer.writeShort(this.prefix.length);
        buffer.writeString(this.prefix);
        buffer.writeString("MH");
        buffer.append(body);
        buffer.flip();
        let result=buffer.toBuffer();
        return result;
    }

    decode(buffer:Uint8Array):any{
        let msg=SKSocket.pbroot.lookupType(`${SKSocket.pbname}.${this.prefix}`);
        let result=msg.decode(buffer);
        return result;
    }
}