nsList, err := getNamespaces(ctx, kubeClient)
	if err != nil {
		return nil, err
	}

	var nsNameList []string
	for _, ns := range nsList {
		if toComplete == "" || strings.HasPrefix(ns.Name, toComplete) {
			nsNameList = append(nsNameList, ns.Name)
		}
	}

	return nsNameList, nil
}

func getNamespaces(ctx context.Context, client kube.CLIClient) ([]corev1.Namespace, error) {