package meta

import (
	"errors"
	"fmt"

	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

// domain is root domain for all GCP K8s Config Connector annotations/labels/apiVersions
const domain = "cnrm.cloud.google.com"

// ProjectAnnotation defines where GCP K8s Config Connector will schedule the
// annotated resource
const ProjectAnnotation = domain + "/project-id"

// FolderAnnotation defines where GCP K8s Config Connector will schedule the
// annotated resource
const FolderAnnotation = domain + "/folder-id"

// DeletionPolicyAnnotation controls what happens to underlying GCP resources when the
// annotated resource is deleted. See https://cloud.google.com/config-connector/docs/how-to/managing-deleting-resources
const DeletionPolicyAnnotation = domain + "/deletion-policy"

// DeletionPolicyAbandon means that the GCP resource is not deleted when the annotated resource is deleted
const DeletionPolicyAbandon = "abandon"

const RemoveDefaultNodePoolAnnotation = domain + "/remove-default-node-pool"

// Group creates a new Group domain based on the GCP base domain
func Group(subdomain string) string {
	return fmt.Sprintf("%s.%s", subdomain, domain)
}

// GetProjectAnnotation pulls the project ID from the K8s Cfg Connector
// project ID annotation and returns an error if it is not present.
// This isn't foolproof because the annotation can be inherited from the resource
// namespace. This function should check the namespace for an annotation
// if it isnt found on the provided resource
func GetProjectAnnotation(meta metav1.ObjectMeta) (string, error) {
	if metav1.HasAnnotation(meta, ProjectAnnotation) {
		return meta.Annotations[ProjectAnnotation], nil
	}
	return "", errors.New("no gcp project anno, cant create rest of resources, @aw185176 should implement namespace checking")
}

// SetProjectAnnotation sets the K8s Cfg Connector project ID annotation to the
// provided value.
func SetProjectAnnotation(meta *metav1.ObjectMeta, id string) {
	metav1.SetMetaDataAnnotation(meta, ProjectAnnotation, id)
}

// DisableSvcOnDestroyAnnotation tells K8s Config Connector to disable the GCP
// Service when the gcpservice object is deleted: https://cloud.google.com/config-connector/docs/reference/resource-docs/serviceusage/service#custom_resource_definition_properties
const DisableSvcOnDestroyAnnotation = domain + "/disable-on-destroy"

// DisableDepSvcAnnotation tells K8s Config Connector to disable the dependent
// GCP Services when a gcpservice object is deleted: https://cloud.google.com/config-connector/docs/reference/resource-docs/serviceusage/service#custom_resource_definition_properties
const DisableDepSvcAnnotation = domain + "/disable-dependent-services"