// Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 controlplaneexposure

import (
	druidv1alpha1 "github.com/gardener/etcd-druid/api/v1alpha1"
	"github.com/gardener/gardener-extension-provider-gcp/pkg/apis/config"
	"github.com/gardener/gardener-extension-provider-gcp/pkg/gcp"
	extensionswebhook "github.com/gardener/gardener/extensions/pkg/webhook"
	"github.com/gardener/gardener/extensions/pkg/webhook/controlplane"
	"github.com/gardener/gardener/extensions/pkg/webhook/controlplane/genericmutator"
	appsv1 "k8s.io/api/apps/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"sigs.k8s.io/controller-runtime/pkg/log"
	"sigs.k8s.io/controller-runtime/pkg/manager"
)

var (
	// DefaultAddOptions are the default AddOptions for AddToManager.
	DefaultAddOptions = AddOptions{}
)

// AddOptions are options to apply when adding the AWS exposure webhook to the manager.
type AddOptions struct {
	// ETCDStorage is the etcd storage configuration.
	ETCDStorage config.ETCDStorage
}

var logger = log.Log.WithName("gcp-controlplaneexposure-webhook")

// AddToManagerWithOptions creates a webhook with the given options and adds it to the manager.
func AddToManagerWithOptions(mgr manager.Manager, opts AddOptions) (*extensionswebhook.Webhook, error) {
	logger.Info("Adding webhook to manager")
	return controlplane.Add(mgr, controlplane.AddArgs{
		Kind:     controlplane.KindSeed,
		Provider: gcp.Type,
		Types:    []runtime.Object{&appsv1.Deployment{}, &druidv1alpha1.Etcd{}},
		Mutator:  genericmutator.NewMutator(NewEnsurer(&opts.ETCDStorage, logger), nil, nil, nil, logger),
	})
}

// AddToManager creates a webhook with the default options and adds it to the manager.
func AddToManager(mgr manager.Manager) (*extensionswebhook.Webhook, error) {
	return AddToManagerWithOptions(mgr, DefaultAddOptions)
}