// Copyright (c) 2018 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 webhooks

import (
	"encoding/json"
	"net/http"

	"github.com/gardener/gardener/pkg/logger"

	admissionv1 "k8s.io/api/admission/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

func admissionResponse(allowed bool, msg string) *admissionv1.AdmissionResponse {
	response := &admissionv1.AdmissionResponse{
		Allowed: allowed,
	}

	if msg != "" {
		response.Result = &metav1.Status{
			Message: msg,
		}
	}

	return response
}

func errToAdmissionResponse(err error) *admissionv1.AdmissionResponse {
	return admissionResponse(false, err.Error())
}

func respond(w http.ResponseWriter, response *admissionv1.AdmissionResponse) {
	responseObj := admissionv1.AdmissionReview{}
	if response != nil {
		responseObj.Response = response
	}

	jsonResponse, err := json.Marshal(responseObj)
	if err != nil {
		logger.Logger.Error(err)
	}
	if _, err := w.Write(jsonResponse); err != nil {
		logger.Logger.Error(err)
	}
}