package packets

import (
	"bytes"
	"errors"
	"io"
)


type PingreqPacket struct {}

func parsePingreq(control controlPacket) (PingreqPacket, error) {
	packet := PingreqPacket{}

	if control.packetType != PacketTypePingreq {
		panic("Wrong packet type for parsePingreq")
	}
	if control.flags != 0 {
		return packet, errors.New("Malformed connect packet")
	}
	
	return packet, nil
}

func (r PingreqPacket) Visit(p PacketVisitor) {
	p.VisitPing(r)
}

type PingrespPacket struct {}

func (p PingrespPacket) Write(w io.Writer) error {
	control := controlPacket {
		packetType: PacketTypePingresp,
		flags: 0,
		reader: bytes.NewReader([]byte{}),
	}

	return control.write(w)
}