package file

import (
	"io/ioutil"
	"os"
	"testing"
	"time"

	"github.com/miekg/coredns/middleware/test"
	"github.com/miekg/dns"
)

func TestZoneReload(t *testing.T) {
	fileName, rm, err := test.TempFile(t, ".", reloadZoneTest)
	if err != nil {
		t.Fatalf("failed to create zone: %s", err)
	}
	defer rm()
	reader, err := os.Open(fileName)
	if err != nil {
		t.Fatalf("failed to open zone: %s", err)
	}
	z, err := Parse(reader, "miek.nl", fileName)
	if err != nil {
		t.Fatalf("failed to parse zone: %s", err)
	}

	z.Reload(nil)

	if _, _, _, res := z.Lookup("miek.nl.", dns.TypeSOA, false); res != Success {
		t.Fatalf("failed to lookup, got %d", res)
	}

	if _, _, _, res := z.Lookup("miek.nl.", dns.TypeNS, false); res != Success {
		t.Fatalf("failed to lookup, got %d", res)
	}

	if len(z.All()) != 5 {
		t.Fatalf("expected 5 RRs, got %d", len(z.All()))
	}
	if err := ioutil.WriteFile(fileName, []byte(reloadZone2Test), 0644); err != nil {
		t.Fatalf("failed to write new zone data", err)
	}
	// Could still be racy, but we need to wait a bit for the event to be seen
	time.Sleep(1 * time.Second)

	if len(z.All()) != 3 {
		t.Fatalf("expected 3 RRs, got %d", len(z.All()))
	}
}

const reloadZoneTest = `miek.nl.		1627	IN	SOA	linode.atoom.net. miek.miek.nl. 1460175181 14400 3600 604800 14400
miek.nl.		1627	IN	NS	ext.ns.whyscream.net.
miek.nl.		1627	IN	NS	omval.tednet.nl.
miek.nl.		1627	IN	NS	linode.atoom.net.
miek.nl.		1627	IN	NS	ns-ext.nlnetlabs.nl.
`

const reloadZone2Test = `miek.nl.		1627	IN	SOA	linode.atoom.net. miek.miek.nl. 1460175181 14400 3600 604800 14400
miek.nl.		1627	IN	NS	ext.ns.whyscream.net.
miek.nl.		1627	IN	NS	omval.tednet.nl.
`
