package lpd

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

type LPDMatcher struct {
	osm.Matchers
}

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

func (m *LPDMatcher) Name(matchCtx *osm.MatchCtx) string {
	return "LPD (Printer)"
}

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

func (m *LPDMatcher) HasResponse(matchCtx *osm.MatchCtx, index int) bool {
	return true
}

func (m *LPDMatcher) IsError(matchCtx *osm.MatchCtx, index int, packet *osm.Packet) bool {
	return false
}

func (m *LPDMatcher) Match(matchCtx *osm.MatchCtx, index int, packet *osm.Packet) error {

	if packet == nil || !packet.Valid() {
		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
}