/*
Copyright 2016 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 rest

import (
	extensionsapiv1beta1 "k8s.io/api/extensions/v1beta1"
	"k8s.io/apiserver/pkg/registry/generic"
	"k8s.io/apiserver/pkg/registry/rest"
	genericapiserver "k8s.io/apiserver/pkg/server"
	serverstorage "k8s.io/apiserver/pkg/server/storage"
	"k8s.io/kubernetes/pkg/api/legacyscheme"
	"k8s.io/kubernetes/pkg/apis/extensions"
	daemonstore "k8s.io/kubernetes/pkg/registry/apps/daemonset/storage"
	deploymentstore "k8s.io/kubernetes/pkg/registry/apps/deployment/storage"
	replicasetstore "k8s.io/kubernetes/pkg/registry/apps/replicaset/storage"
	expcontrollerstore "k8s.io/kubernetes/pkg/registry/extensions/controller/storage"
	ingressstore "k8s.io/kubernetes/pkg/registry/extensions/ingress/storage"
	networkpolicystore "k8s.io/kubernetes/pkg/registry/networking/networkpolicy/storage"
	pspstore "k8s.io/kubernetes/pkg/registry/policy/podsecuritypolicy/storage"
)

type RESTStorageProvider struct{}

func (p RESTStorageProvider) NewRESTStorage(apiResourceConfigSource serverstorage.APIResourceConfigSource, restOptionsGetter generic.RESTOptionsGetter) (genericapiserver.APIGroupInfo, bool) {
	apiGroupInfo := genericapiserver.NewDefaultAPIGroupInfo(extensions.GroupName, legacyscheme.Scheme, legacyscheme.ParameterCodec, legacyscheme.Codecs)
	// If you add a version here, be sure to add an entry in `k8s.io/kubernetes/cmd/kube-apiserver/app/aggregator.go with specific priorities.
	// TODO refactor the plumbing to provide the information in the APIGroupInfo

	if apiResourceConfigSource.VersionEnabled(extensionsapiv1beta1.SchemeGroupVersion) {
		apiGroupInfo.VersionedResourcesStorageMap[extensionsapiv1beta1.SchemeGroupVersion.Version] = p.v1beta1Storage(apiResourceConfigSource, restOptionsGetter)
	}

	return apiGroupInfo, true
}

type RollbackREST struct {
	*deploymentstore.RollbackREST
}

// override RollbackREST.ProducesObject
func (r *RollbackREST) ProducesObject(verb string) interface{} {
	return extensionsapiv1beta1.DeploymentStatus{}
}

var _ = rest.StorageMetadata(&RollbackREST{})

func (p RESTStorageProvider) v1beta1Storage(apiResourceConfigSource serverstorage.APIResourceConfigSource, restOptionsGetter generic.RESTOptionsGetter) map[string]rest.Storage {
	storage := map[string]rest.Storage{}

	// This is a dummy replication controller for scale subresource purposes.
	// TODO: figure out how to enable this only if needed as a part of scale subresource GA.
	controllerStorage := expcontrollerstore.NewStorage(restOptionsGetter)
	storage["replicationcontrollers"] = controllerStorage.ReplicationController
	storage["replicationcontrollers/scale"] = controllerStorage.Scale

	// daemonsets
	daemonSetStorage, daemonSetStatusStorage := daemonstore.NewREST(restOptionsGetter)
	storage["daemonsets"] = daemonSetStorage.WithCategories(nil)
	storage["daemonsets/status"] = daemonSetStatusStorage

	//deployments
	deploymentStorage := deploymentstore.NewStorage(restOptionsGetter)
	storage["deployments"] = deploymentStorage.Deployment.WithCategories(nil)
	storage["deployments/status"] = deploymentStorage.Status
	storage["deployments/rollback"] = &RollbackREST{deploymentStorage.Rollback}
	storage["deployments/scale"] = deploymentStorage.Scale
	// ingresses
	ingressStorage, ingressStatusStorage := ingressstore.NewREST(restOptionsGetter)
	storage["ingresses"] = ingressStorage
	storage["ingresses/status"] = ingressStatusStorage

	// podsecuritypolicy
	podSecurityPolicyStorage := pspstore.NewREST(restOptionsGetter)
	storage["podSecurityPolicies"] = podSecurityPolicyStorage

	// replicasets
	replicaSetStorage := replicasetstore.NewStorage(restOptionsGetter)
	storage["replicasets"] = replicaSetStorage.ReplicaSet.WithCategories(nil)
	storage["replicasets/status"] = replicaSetStorage.Status
	storage["replicasets/scale"] = replicaSetStorage.Scale

	// networkpolicies
	networkExtensionsStorage := networkpolicystore.NewREST(restOptionsGetter)
	storage["networkpolicies"] = networkExtensionsStorage

	return storage
}

func (p RESTStorageProvider) GroupName() string {
	return extensions.GroupName
}