package lpd

import (
	osm "git.loafle.net/overflow/service_matcher-go"
)

type LPDMatcher struct {
	osm.Matchers
	meta osm.Metadata
}

func (l *LPDMatcher) Key() string {
	return "LPD"
}

func (l *LPDMatcher) Meta() osm.Metadata {
	return l.meta
}

func (l *LPDMatcher) Name() string {
	return "LPD (Printer)"
}

func (l *LPDMatcher) IsPrePacket() bool {
	return false
}

func (l *LPDMatcher) HasResponse(index int) bool {
	return true
}

func (l *LPDMatcher) IsError(info osm.MatchInfo, index int, packet *osm.Packet) bool {
	return false
}

func (l *LPDMatcher) Match(info osm.MatchInfo, index int, packet *osm.Packet) error {

	if packet == nil || packet.Buffer == nil || packet.Len == 0 {
		return osm.NoPacketReceivedError()
	}

	if packet.Len != 1 {
		return osm.NotMatchedError()
	}

	return nil
}

func NewMatcher() osm.Matcher {

	m := &LPDMatcher{}
	reqStr := "GET / HTTP/1.1\r\n\r\n"
	rbyte := make([]byte, len(reqStr))
	copy(rbyte[:], reqStr)

	m.AddPacket(osm.NewPacket(rbyte, len(reqStr)))

	return m
}