// will exit with an error.
type ProxyMode string

const (
	ProxyModeIPTables    ProxyMode = "iptables"
	ProxyModeIPVS        ProxyMode = "ipvs"
	ProxyModeNFTables    ProxyMode = "nftables"
	ProxyModeKernelspace ProxyMode = "kernelspace"
)

func (m *ProxyMode) Set(s string) error {
	*m = ProxyMode(s)
	return nil
}

func (m *ProxyMode) String() string {
	if m != nil {

			expectedErrs: field.ErrorList{field.Invalid(newPath.Child("ProxyMode"), "kernelspace", "must be iptables, ipvs, nftables or blank (blank means the best-available proxy [currently iptables])")},
		},
		"invalid mode non-existent": {
			mode:         kubeproxyconfig.ProxyMode("non-existing"),

	}

	return allErrs
}

func validateProxyMode(mode kubeproxyconfig.ProxyMode, fldPath *field.Path) field.ErrorList {
	if runtime.GOOS == "windows" {
		return validateProxyModeWindows(mode, fldPath)
	}

	return validateProxyModeLinux(mode, fldPath)
}

func validateProxyModeLinux(mode kubeproxyconfig.ProxyMode, fldPath *field.Path) field.ErrorList {
	validModes := sets.New[string](

	return nil, unsupportedError
}

// platformCleanup removes stale kube-proxy rules that can be safely removed.
func platformCleanup(ctx context.Context, mode proxyconfigapi.ProxyMode, cleanupAndExit bool) error {
	return unsupportedError

	recorder events.EventRecorder,
) *HollowProxy {
	return &HollowProxy{
		ProxyServer: &proxyapp.ProxyServer{
			Config: &proxyconfigapi.KubeProxyConfiguration{
				Mode:             proxyconfigapi.ProxyMode("fake"),
				ConfigSyncPeriod: metav1.Duration{Duration: 30 * time.Second},
				OOMScoreAdj:      ptr.To[int32](0),
			},

			Client:      client,
			Proxier:     &FakeProxier{},
			Broadcaster: broadcaster,

	}

	return proxier, nil
}

// platformCleanup removes stale kube-proxy rules that can be safely removed.
func platformCleanup(ctx context.Context, mode proxyconfigapi.ProxyMode, cleanupAndExit bool) error {
	if cleanupAndExit {
		return errors.New("--cleanup-and-exit is not implemented on Windows")
	}
	return nil

	out.MetricsBindAddress = in.MetricsBindAddress
	out.BindAddressHardFail = in.BindAddressHardFail
	out.EnableProfiling = in.EnableProfiling
	out.ShowHiddenMetricsForVersion = in.ShowHiddenMetricsForVersion
	out.Mode = config.ProxyMode(in.Mode)
	if err := Convert_v1alpha1_KubeProxyIPTablesConfiguration_To_config_KubeProxyIPTablesConfiguration(&in.IPTables, &out.IPTables, s); err != nil {
		return err
	}

	netutils "k8s.io/utils/net"
	"k8s.io/utils/ptr"
)

func Test_platformApplyDefaults(t *testing.T) {
	testCases := []struct {
		name                string
		mode                proxyconfigapi.ProxyMode
		expectedMode        proxyconfigapi.ProxyMode
		detectLocal         proxyconfigapi.LocalMode
		expectedDetectLocal proxyconfigapi.LocalMode
	}{
		{
			name:                "defaults",
			mode:                "",

	err := s.setupConntrack(ctx)
	if err != nil {
		return err
	}

	return nil
}

// isIPTablesBased checks whether mode is based on iptables rather than nftables
func isIPTablesBased(mode proxyconfigapi.ProxyMode) bool {
	return mode == proxyconfigapi.ProxyModeIPTables || mode == proxyconfigapi.ProxyModeIPVS
}

// getIPTables returns an array of [IPv4, IPv6] utiliptables.Interfaces. If primaryFamily

)

var registerMetricsOnce sync.Once

// RegisterMetrics registers kube-proxy metrics.
func RegisterMetrics(mode kubeproxyconfig.ProxyMode) {
	registerMetricsOnce.Do(func() {
		// Core kube-proxy metrics for all backends
		legacyregistry.MustRegister(SyncProxyRulesLatency)
		legacyregistry.MustRegister(SyncProxyRulesLastQueuedTimestamp)