func Confirm(msg string, writer io.Writer) bool {
	for {
		_, _ = fmt.Fprintf(writer, "%s ", msg)
		var response string
		_, err := fmt.Scanln(&response)
		if err != nil {
			return false
		}
		switch strings.ToUpper(response) {
		case "Y", "YES":
			return true
		case "N", "NO":
			return false
		}
	}

	return "Level"
}

// Set is a function declared in the pflag.Value interface
func (m *MessageThreshold) Set(s string) error {
	levelMap := diag.GetUppercaseStringToLevelMap()
	level, ok := levelMap[strings.ToUpper(s)]
	if !ok {
		return errors.New("invalid level option")
	}
	m.Level = level
	return nil

func Confirm(msg string, writer io.Writer) bool {
	for {
		_, _ = fmt.Fprintf(writer, "%s ", msg)
		var response string
		_, err := fmt.Scanln(&response)
		if err != nil {
			return false
		}
		switch strings.ToUpper(response) {
		case "Y", "YES":
			return true
		case "N", "NO":
			return false
		}
	}
}

func KubernetesClients(kubeClient kube.CLIClient, l clog.Logger) (kube.CLIClient, client.Client, error) {

	rootCmd.Flags().Bool(name, value, usage)
	registerEnvironment(name, value, usage)
}

func registerEnvironment[T env.Parseable](name string, defaultValue T, usage string) {
	envName := strings.Replace(strings.ToUpper(name), "-", "_", -1)
	// Note: we do not rely on istio env package to retrieve configuration. We relies on viper.
	// This is just to make sure the reference doc tool can generate doc with these vars as env variable at istio.io.