/*
Copyright 2019 The Jetstack cert-manager contributors.

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 ca

import (
	corelisters "k8s.io/client-go/listers/core/v1"

	apiutil "github.com/jetstack/cert-manager/pkg/api/util"
	"github.com/jetstack/cert-manager/pkg/apis/certmanager/v1alpha1"
	"github.com/jetstack/cert-manager/pkg/controller"
	"github.com/jetstack/cert-manager/pkg/issuer"
)

// CA is a simple CA implementation backed by the Kubernetes API server.
// A secret resource is used to store a CA public and private key that is then
// used to sign certificates.
type CA struct {
	*controller.Context
	issuer        v1alpha1.GenericIssuer
	secretsLister corelisters.SecretLister

	// Namespace in which to read resources related to this Issuer from.
	// For Issuers, this will be the namespace of the Issuer.
	// For ClusterIssuers, this will be the cluster resource namespace.
	resourceNamespace string
}

func NewCA(ctx *controller.Context, issuer v1alpha1.GenericIssuer) (issuer.Interface, error) {
	secretsLister := ctx.KubeSharedInformerFactory.Core().V1().Secrets().Lister()

	return &CA{
		Context:           ctx,
		issuer:            issuer,
		secretsLister:     secretsLister,
		resourceNamespace: ctx.IssuerOptions.ResourceNamespace(issuer),
	}, nil
}

func init() {
	issuer.RegisterIssuer(apiutil.IssuerCA, NewCA)
}
