const GroupName = "admission.k8s.io"

var (
	// SchemeBuilder the schema builder
	SchemeBuilder = runtime.NewSchemeBuilder(addKnownTypes)
	// AddToScheme handler to add items to the schema
	AddToScheme = SchemeBuilder.AddToScheme
)

var SchemeGroupVersion = schema.GroupVersion{Group: GroupName, Version: runtime.APIVersionInternal}

type AdmissionRequest struct {
	// UID is an identifier for the individual request/response. It allows us to distinguish instances of requests which are
	// otherwise identical (parallel requests, requests when earlier requests did not modify etc)
	// The UID is meant to track the round trip (request/response) between the KAS and the WebHook, not the user request.
	// It is suitable for correlating log entries between the webhook and apiserver, for either auditing or debugging.
	UID types.UID
	// Kind is the type of object being manipulated.  For example: Pod
	Kind metav1.GroupVersionKind
	// Resource is the name of the resource being requested.  This is not the kind.  For example: pods
	Resource metav1.GroupVersionResource
	// SubResource is the name of the subresource being requested.  This is a different resource, scoped to the parent
	// resource, but it may have a different kind. For instance, /pods has the resource "pods" and the kind "Pod", while
	// /pods/foo/status has the resource "pods", the sub resource "status", and the kind "Pod" (because status operates on
	// pods). The binding resource for a pod though may be /pods/foo/binding, which has resource "pods", subresource
	// "binding", and kind "Binding".
	// +optional
	SubResource string
	// Name is the name of the object as presented in the request.  On a CREATE operation, the client may omit name and
	// rely on the server to generate the name.  If that is the case, this method will return the empty string.
	// +optional
	Name string
	// Namespace is the namespace associated with the request (if any).
	// +optional
	Namespace string
	// Operation is the operation being performed
	Operation Operation
	// UserInfo is information about the requesting user
	UserInfo authentication.UserInfo
	// Object is the object from the incoming request prior to default values being applied
	// +optional
	Object runtime.Object
	// OldObject is the existing object. Only populated for UPDATE requests.
	// +optional
	OldObject runtime.Object
	// DryRun indicates that modifications will definitely not be persisted for this request.
	// Calls to webhooks must have no side effects if DryRun is true.
	// Defaults to false.
	// +optional
	DryRun *bool
}

type AdmissionResponse struct {
	// UID is an identifier for the individual request/response.
	// This should be copied over from the corresponding AdmissionRequest.
	UID types.UID
	// Allowed indicates whether or not the admission request was permitted.
	Allowed bool
	// Result contains extra details into why an admission request was denied.
	// This field IS NOT consulted in any way if "Allowed" is "true".
	// +optional
	Result *metav1.Status
	// Patch contains the actual patch. Currently we only support a response in the form of JSONPatch, RFC 6902.
	// +optional
	Patch []byte
	// PatchType indicates the form the Patch will take. Currently we only support "JSONPatch".
	// +optional
	PatchType *PatchType
	// AuditAnnotations is an unstructured key value map set by remote admission controller (e.g. error=image-blacklisted).
	// MutatingAdmissionWebhook and ValidatingAdmissionWebhook admission controller will prefix the keys with
	// admission webhook name (e.g. imagepolicy.example.com/error=image-blacklisted). AuditAnnotations will be provided by
	// the admission webhook to add additional context to the audit log for this request.
	// +optional
	AuditAnnotations map[string]string
}

type AdmissionReview struct {
	metav1.TypeMeta

	// Request describes the attributes for the admission request.
	// +optional
	Request *AdmissionRequest

	// Response describes the attributes for the admission response.
	// +optional
	Response *AdmissionResponse
}

type Operation string

const (
	Create  Operation = "CREATE"
	Update  Operation = "UPDATE"
	Delete  Operation = "DELETE"
	Connect Operation = "CONNECT"
)

type PatchType string

const (
	PatchTypeJSONPatch PatchType = "JSONPatch"
)