/*
Copyright 2020 The cert-manager 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 controller

import (
	cmapi "github.com/cert-manager/cert-manager/pkg/apis/certmanager/v1"
	cmmeta "github.com/cert-manager/cert-manager/pkg/apis/meta/v1"
)

// ResourceNamespace returns the Kubernetes namespace where resources
// created or read by `iss` are located.
func (o IssuerOptions) ResourceNamespace(iss cmapi.GenericIssuer) string {
	ns := iss.GetObjectMeta().Namespace
	if ns == "" {
		ns = o.ClusterResourceNamespace
	}
	return ns
}

// ResourceNamespaceRef returns the Kubernetes namespace where resources
// created or read by the referenced issuer are located.
// This function is identical to ResourceNamespace, but takes a reference to
// the issuer instead of the issuer itself (which means we don't need to fetch the
// issuer from the API server).
func (o IssuerOptions) ResourceNamespaceRef(ref cmmeta.IssuerReference, challengeNamespace string) string {
	switch ref.Kind {
	case cmapi.ClusterIssuerKind:
		return o.ClusterResourceNamespace
	case cmapi.IssuerKind:
		return challengeNamespace
	}
	return challengeNamespace // Should not be reached
}

// CanUseAmbientCredentials returns whether `iss` will attempt to configure itself
// from ambient credentials (e.g., from a cloud metadata service).
func (o IssuerOptions) CanUseAmbientCredentials(iss cmapi.GenericIssuer) bool {
	switch iss.(type) {
	case *cmapi.ClusterIssuer:
		return o.ClusterIssuerAmbientCredentials
	case *cmapi.Issuer:
		return o.IssuerAmbientCredentials
	}
	return false
}

// CanUseAmbientCredentialsFromRef returns whether the referenced issuer will attempt
// to configure itself from ambient credentials (e.g., from a cloud metadata service).
// This function is identical to CanUseAmbientCredentials, but takes a reference to
// the issuer instead of the issuer itself (which means we don't need to fetch the
// issuer from the API server).
func (o IssuerOptions) CanUseAmbientCredentialsFromRef(ref cmmeta.IssuerReference) bool {
	switch ref.Kind {
	case cmapi.ClusterIssuerKind:
		return o.ClusterIssuerAmbientCredentials
	case cmapi.IssuerKind:
		return o.IssuerAmbientCredentials
	}
	return false
}
