package dns

import (
	"bytes"
	"fmt"
	"io"
	"time"

	"github.com/libdns/libdns"
)

// WriteTo writes the DNS data for the cluster
func (mgr *Manager) WriteTo(w io.Writer) (int64, error) {
	var buf bytes.Buffer

	records := mgr.genAllAddrRecords()
	for i := range records {
		r := &records[i]
		r.Name = fmt.Sprintf("%s.%s.", r.Name, mgr.domain)
	}

	for _, rr1 := range records {
		for _, rr2 := range rr1.Export() {
			writeRecord(&buf, rr2)
		}
	}

	return buf.WriteTo(w)
}

func writeRecord(w io.Writer, rr libdns.Record) {
	_, _ = fmt.Fprintf(w, "%s\t%v\tIN\t%s\t%s\n",
		rr.Name, int(rr.TTL/time.Second),
		rr.Type, rr.Value)
}