"errors"
	"fmt"
)

var ErrPartialAdd = errors.New("partial add error")

type PartialAddError struct {
	inner error
}

func (e *PartialAddError) Error() string {
	return fmt.Sprintf("%s: %v", ErrPartialAdd.Error(), e.inner)
}

func (e *PartialAddError) Unwrap() []error {
	return []error{ErrPartialAdd, e.inner}
}

func NewErrPartialAdd(err error) *PartialAddError {
	return &PartialAddError{
		inner: err,
	}

	ConstructInitialSnapshot(ambientPods []*corev1.Pod) error
	Start(ctx context.Context)

	//	IsPodInMesh(ctx context.Context, pod *metav1.ObjectMeta, netNs string) (bool, error)
	AddPodToMesh(ctx context.Context, pod *corev1.Pod, podIPs []netip.Addr, netNs string) error
	RemovePodFromMesh(ctx context.Context, pod *corev1.Pod) error
	DelPodFromMesh(ctx context.Context, pod *corev1.Pod) error

	Stop()
}

type Server struct {

	currentPodSnapshot   *podNetnsCache
	iptablesConfigurator *iptables.IptablesConfigurator
	podNs                PodNetnsFinder
	// allow overriding for tests
	netnsRunner        func(fdable NetnsFd, toRun func() error) error
	hostsideProbeIPSet ipset.IPSet
}

var _ MeshDataplane = &NetServer{}

func newNetServer(ztunnelServer ZtunnelServer, podNsMap *podNetnsCache,

}

type annotationValidationFunc func(value string) error

type annotationParam struct {
	key        string
	defaultVal string
	validator  annotationValidationFunc
}

func alwaysValidFunc(value string) error {
	return nil
}

// validateInterceptionMode validates the interceptionMode annotation
func validateInterceptionMode(mode string) error {
	switch mode {
	case redirectModeREDIRECT:

	if f.testWG != nil {
		defer f.testWG.Done()
	}
	args := f.Called(ctx, pod, podIPs, netNs)
	return args.Error(0)
}

func (f *fakeServer) RemovePodFromMesh(ctx context.Context, pod *corev1.Pod) error {
	if f.testWG != nil {
		defer f.testWG.Done()
	}
	args := f.Called(ctx, pod)
	return args.Error(0)
}

		if err := testClient.List(context.TODO(), objects); err != nil {
			log.Error(err.Error())
			continue
		}
		for _, o := range objects.Items {
			no := o.DeepCopy()
			out = append(out, object.NewK8sObject(no, nil, nil))
		}
	}
	return out
}

// readFile reads a file and returns the contents.
func readFile(path string) (string, error) {
	b, err := os.ReadFile(path)
	return string(b), err
}

	out := c.FullDump
	if outputFormat == "yaml" {
		var err error
		out, err = yaml.JSONToYAML(out)
		if err != nil {
			return err
		}
	}
	fmt.Fprintln(c.Stdout, string(out))
	return nil
}

// PrintVersionSummary prints version information for Istio and Ztunnel from the config dump
func (c *ConfigWriter) PrintVersionSummary() error {
	// TODO
	return nil
}

	kubeClientGetPodLimit = 500
)

type ControlPlaneNotFoundError struct {
	Namespace string
}

func (c ControlPlaneNotFoundError) Error() string {
	return fmt.Sprintf("no running Istio pods in %q", c.Namespace)
}

var _ error = ControlPlaneNotFoundError{}

type Options struct {
	// MessageWriter is a writer for displaying messages to users.
	MessageWriter io.Writer

	log.FindScope("default").SetOutputLevel(log.DebugLevel)
	log.Debug("debug log")
	log.Info("info log")
	log.Warn("warn log")
	log.Error("error log")
	// This will error because stdout cannot sync, but the UDS part should sync
	// Ideally we would fail if the UDS part fails but the error library makes it kind of tricky
	_ = log.Sync()

	// Restore os stdout.
	os.Stdout = stdout
	assert.NoError(t, log.Configure(loggingOptions))

	return func(nspath string) (NetnsCloser, error) {
		nspathInContainer := filepath.Join(hostMountsPath, nspath)
		ns, err := OpenNetns(nspathInContainer)
		if err != nil {
			err = fmt.Errorf("failed to open netns: %w. Make sure that the netns host path %s is mounted in under %s in the container", err, nspath, hostMountsPath)
			log.Error(err.Error())
		}
		return ns, err
	}