package hello

import (
	"github.com/fumiama/orbyte/pbuf"
	"github.com/sirupsen/logrus"

	"github.com/fumiama/WireGold/gold/head"
	"github.com/fumiama/WireGold/gold/link"
	"github.com/fumiama/WireGold/internal/file"
)

func init() {
	link.RegisterDispacher(head.ProtoHello, func(_ *head.Packet, peer *link.Link, data pbuf.Bytes) {
		data.V(func(b []byte) {
			switch {
			case len(b) == 0:
				logrus.Warnln(file.Header(), "recv old packet, do nothing")
			case b[0] == byte(head.HelloPing):
				go peer.WritePacket(head.ProtoHello, []byte{byte(head.HelloPong)}, peer.Me().TTL())
				logrus.Infoln(file.Header(), "recv, send ack")
			default:
				logrus.Infoln(file.Header(), "recv ack, do nothing")
			}
		})
	})
}