package dns

import (
	"net"
	"testing"
)

func TestPackUnpack(t *testing.T) {
	out := new(Msg)
	out.Answer = make([]RR, 1)
	key := new(RR_DNSKEY)
	key = &RR_DNSKEY{Flags: 257, Protocol: 3, Algorithm: RSASHA1}
	key.Hdr = RR_Header{Name: "miek.nl.", Rrtype: TypeDNSKEY, Class: ClassINET, Ttl: 3600}
	key.PublicKey = "AwEAAaHIwpx3w4VHKi6i1LHnTaWeHCL154Jug0Rtc9ji5qwPXpBo6A5sRv7cSsPQKPIwxLpyCrbJ4mr2L0EPOdvP6z6YfljK2ZmTbogU9aSU2fiq/4wjxbdkLyoDVgtO+JsxNN4bjr4WcWhsmk1Hg93FV9ZpkWb0Tbad8DFqNDzr//kZ"

	out.Answer[0] = key
	msg, ok := out.Pack()
	if !ok {
		t.Log("Failed to pack msg with DNSKEY")
		t.Fail()
	}
	in := new(Msg)
	if !in.Unpack(msg) {
		t.Log("Failed to unpack msg with DNSKEY")
		t.Fail()
	}

	sig := new(RR_RRSIG)
	sig = &RR_RRSIG{TypeCovered: TypeDNSKEY, Algorithm: RSASHA1, Labels: 2,
		OrigTtl: 3600, Expiration: 4000, Inception: 4000, KeyTag: 34641, SignerName: "miek.nl.",
		Signature: "AwEAAaHIwpx3w4VHKi6i1LHnTaWeHCL154Jug0Rtc9ji5qwPXpBo6A5sRv7cSsPQKPIwxLpyCrbJ4mr2L0EPOdvP6z6YfljK2ZmTbogU9aSU2fiq/4wjxbdkLyoDVgtO+JsxNN4bjr4WcWhsmk1Hg93FV9ZpkWb0Tbad8DFqNDzr//kZ"}
	sig.Hdr = RR_Header{Name: "miek.nl.", Rrtype: TypeRRSIG, Class: ClassINET, Ttl: 3600}

	out.Answer[0] = sig
	msg, ok = out.Pack()
	if !ok {
		t.Log("Failed to pack msg with RRSIG")
		t.Fail()
	}

	if !in.Unpack(msg) {
		t.Log("Failed to unpack msg with RRSIG")
		t.Fail()
	}
}

func TestPackUnpack2(t *testing.T) {
	m := new(Msg)
	m.Extra = make([]RR, 1)
	m.Answer = make([]RR, 1)
	dom := "miek.nl."
	rr := new(RR_A)
	rr.Hdr = RR_Header{Name: dom, Rrtype: TypeA, Class: ClassINET, Ttl: 0}
	rr.A = net.IPv4(127, 0, 0, 1)

	x := new(RR_TXT)
	x.Hdr = RR_Header{Name: dom, Rrtype: TypeTXT, Class: ClassINET, Ttl: 0}
	x.Txt = []string{"heelalaollo"}

	m.Extra[0] = x
	m.Answer[0] = rr
	_, ok := m.Pack()
	if !ok {
		t.Log("Packing failed")
		t.Fail()
		return
	}
}

func TestBailiwick(t *testing.T) {
	yes := map[string]string{
		"miek.nl": "ns.miek.nl",
		".":       "miek.nl",
	}
	for parent, child := range yes {
		if !IsSubDomain(parent, child) {
			t.Logf("%s should be child of %s\n", child, parent)
			t.Logf("comparelabels %d", CompareLabels(parent, child))
			t.Logf("lenlabels %d %d", LenLabels(parent), LenLabels(child))
			t.Fail()
		}
	}
	no := map[string]string{
		"www.miek.nl": "ns.miek.nl",
		"miek.nl":     ".",
	}
	for parent, child := range no {
		if IsSubDomain(parent, child) {
			t.Logf("%s should not be child of %s\n", child, parent)
			t.Logf("comparelabels %d", CompareLabels(parent, child))
			t.Logf("lenlabels %d %d", LenLabels(parent), LenLabels(child))
			t.Fail()
		}
	}
}

func TestPack(t *testing.T) {
	rr := []string{"US.    86400	IN	NSEC	0-.us. NS SOA RRSIG NSEC DNSKEY TYPE65534"}
	m := new(Msg)
	var err error
	m.Answer = make([]RR, 1)
	for _, r := range rr {
		m.Answer[0], err = NewRR(r)
		if err != nil {
			t.Logf("Failed to create RR: %s\n", err.Error())
			t.Fail()
			continue
		}
		if _, ok := m.Pack(); !ok {
			t.Log("Packing failed")
			t.Fail()
		}
	}
	x := new(Msg)
	ns, _ := NewRR("pool.ntp.org.   390 IN  NS  a.ntpns.org")
	ns.(*RR_NS).Ns = "a.ntpns.org."
	x.Ns = append(m.Ns, ns)
	x.Ns = append(m.Ns, ns)
	x.Ns = append(m.Ns, ns)
	// This crashes due to the fact the a.ntpns.org isn't a FQDN
	// How to recover() from a remove panic()?
	if _, ok := x.Pack(); !ok {
		t.Log("Packing failed")
		t.Fail()
	}
	x.Answer = make([]RR, 1)
	x.Answer[0], err = NewRR(rr[0])
	if _, ok := x.Pack(); !ok {
		t.Log("Packing failed")
		t.Fail()
	}
}

func TestCompressLenght(t *testing.T) {
	m := new(Msg)
	m.SetQuestion("miek.nl", TypeMX)
	ul := m.Len()
	m.Compress = true
	if ul != m.Len(){
		t.Fatalf("Should be equal")
	}
}