client

type GenericClient[T client.Object, L client.ObjectList] interface {
	Reader[T, L]
	Writer[T]
	StatusClient[T]

	// Scheme returns the scheme this client is using.
	Scheme() *runtime.Scheme
	// RESTMapper returns the rest this client is using.
	RESTMapper() meta.RESTMapper
	// GroupVersionKindFor returns the GroupVersionKind for the given object.
	GroupVersionKindFor(obj runtime.Object) (schema.GroupVersionKind, error)
	// IsObjectNamespaced returns true if the GroupVersionKind of the object is namespaced.
	IsObjectNamespaced(obj runtime.Object) (bool, error)
}

type Reader[T client.Object, L client.ObjectList] interface {

	// Get retrieves an obj for the given object key from the Kubernetes Cluster.
	// obj must be a struct pointer so that obj can be updated with the response
	// returned by the Server.
	Get(ctx context.Context, key client.ObjectKey) (T, error)

	// List retrieves list of objects for a given namespace and list options. On a
	// successful call, Items field in the list will be populated with the
	// result returned from the server.
	List(ctx context.Context, opts ...client.ListOption) (L, error)
}

type StatusClient[T client.Object] interface {
	Status() StatusWriter[T]
}

type StatusWriter[T client.Object] interface {
	// Update updates the fields corresponding to the status subresource for the
	// given obj. obj must be a struct pointer so that obj can be updated
	// with the content returned by the Server.
	Update(ctx context.Context, obj T, opts ...client.SubResourceUpdateOption) error

	// Patch patches the given object's subresource. obj must be a struct
	// pointer so that obj can be updated with the content returned by the
	// Server.
	Patch(ctx context.Context, obj T, patch client.Patch, opts ...client.SubResourcePatchOption) error
}

type TransitionFunction[T client.Object] func(existing, desired T) error

type Writer[T client.Object] interface {
	// Create saves the object obj in the Kubernetes cluster.
	Create(ctx context.Context, obj T, opts ...client.CreateOption) error

	// Delete deletes the given obj from Kubernetes cluster.
	Delete(ctx context.Context, obj T, opts ...client.DeleteOption) error

	// Update updates the given obj in the Kubernetes cluster. obj must be a
	// struct pointer so that obj can be updated with the content returned by the Server.
	Update(ctx context.Context, obj T, opts ...client.UpdateOption) error

	// Patch patches the given obj in the Kubernetes cluster. obj must be a
	// struct pointer so that obj can be updated with the content returned by the Server.
	Patch(ctx context.Context, obj T, patch client.Patch, opts ...client.PatchOption) error

	// DeleteAllOf deletes all objects of the given type matching the given options.
	DeleteAllOf(ctx context.Context, obj T, opts ...client.DeleteAllOfOption) error

	// Create or Update the passed in object.
	Upsert(ctx context.Context, obj T, transitionFuncs ...TransitionFunction[T]) error
}