import (
  "k8s.io/apimachinery/pkg/runtime"
  "sigs.k8s.io/controller-runtime/pkg/reconcile"
  "sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"

  "github.com/crossplaneio/crossplane/pkg/apis/cooltype/v1alpha1"
)

// Result of a Sync or Delete call.
type Result struct {
  reconcile.Result
  NeedsUpdate []NeedsUpdate
}

// NeedsUpdate is an Object that needs to be updated as a side effect of
// a Sync or Delete operation on a different Object. For example a
// Secret that must be updated when a ResourceType is synced.
type NeedsUpdate struct {
  Object   runtime.Object
  MutateFn controllerutil.UpdateFn
}

// Update (or create) the Object that needs an update.
func (u NeedsUpdate) Update(ctx context.Context, c client.Client) (controllerutil.OperationResult, error) {
  return controllerutil.CreateOrUpdate(ctx, c, u.Object, u.MutateFn)
}

// A Syncer can sync resources with an external store - e.g. the AWS API.
type Syncer interface {
	// Sync the supplied resource with the external store.
	Sync(ctx context.Context, r *v1alpha1.ResourceType) Result
}

// A Deleter can delete resources from an external store - e.g. the AWS API.
type Deleter interface {
	// Delete the supplied resource from the external store.
	Delete(ctx context.Context, r *v1alpha1.ResourceType) Result
}