package dns

import (
	"io"
	"net"

	"github.com/qdm12/golibs/command"
	"github.com/qdm12/golibs/files"
	"github.com/qdm12/golibs/logging"
	"github.com/qdm12/golibs/network"
	"github.com/qdm12/private-internet-access-docker/internal/settings"
)

const logPrefix = "dns configurator"

type Configurator interface {
	DownloadRootHints(uid, gid int) error
	DownloadRootKey(uid, gid int) error
	MakeUnboundConf(settings settings.DNS, uid, gid int) (err error)
	UseDNSInternally(IP net.IP)
	UseDNSSystemWide(IP net.IP) error
	Start(logLevel uint8) (stdout io.ReadCloser, waitFn func() error, err error)
	WaitForUnbound() (err error)
	Version() (version string, err error)
}

type configurator struct {
	logger      logging.Logger
	client      network.Client
	fileManager files.FileManager
	commander   command.Commander
	lookupIP    func(host string) ([]net.IP, error)
}

func NewConfigurator(logger logging.Logger, client network.Client, fileManager files.FileManager) Configurator {
	return &configurator{
		logger:      logger,
		client:      client,
		fileManager: fileManager,
		commander:   command.NewCommander(),
		lookupIP:    net.LookupIP,
	}
}