/*
Copyright 2020 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package rbac

import (
	"path/filepath"

	"sigs.k8s.io/kubebuilder/v4/pkg/machinery"
)

var _ machinery.Template = &LeaderElectionRoleBinding{}

// LeaderElectionRoleBinding scaffolds a file that defines the role binding that allows leader election
type LeaderElectionRoleBinding struct {
	machinery.TemplateMixin
	machinery.ProjectNameMixin
}

// SetTemplateDefaults implements machinery.Template
func (f *LeaderElectionRoleBinding) SetTemplateDefaults() error {
	if f.Path == "" {
		f.Path = filepath.Join("config", "rbac", "leader_election_role_binding.yaml")
	}

	f.TemplateBody = leaderElectionRoleBindingTemplate

	return nil
}

const leaderElectionRoleBindingTemplate = `apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  labels:
    app.kubernetes.io/name: {{ .ProjectName }}
    app.kubernetes.io/managed-by: kustomize
  name: leader-election-rolebinding
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: leader-election-role
subjects:
- kind: ServiceAccount
  name: controller-manager
  namespace: system
`
