package peer

import (
	"log"
)

func unmarshalPacket(nonce Nonce, data []byte) Packet {
	var packet Packet

	switch nonce.PacketType {
	case PACKET_TYPE_PING:
		packet = &Ping{}
	case PACKET_TYPE_PONG:
		packet = &Pong{}
	case PACKET_TYPE_LIST_ADDR_REQ:
		packet = &AddrListReq{}
	case PACKET_TYPE_LIST_ADDR_RESP:
		packet = &AddrListResp{}
	default:
		// TODO: Log.
		return nil
	}

	if len(data) < packet.Size() {
		log.Printf("Short packet[%d]: %d", nonce.PacketType, len(data))
		return nil
	}

	packet.Parse(data[:packet.Size()])

	return packet
}