// Copyright © 2019 The Knative 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 serving

import (
	"errors"

	servingv1alpha1 "github.com/knative/serving/pkg/apis/serving/v1alpha1"
)

func GetConfiguration(service *servingv1alpha1.Service) (*servingv1alpha1.ConfigurationSpec, error) {
	if service.Spec.RunLatest != nil {
		return &service.Spec.RunLatest.Configuration, nil
	} else if service.Spec.Release != nil {
		return &service.Spec.Release.Configuration, nil
	} else if service.Spec.DeprecatedPinned != nil {
		return &service.Spec.DeprecatedPinned.Configuration, nil
	} else {
		return nil, errors.New("Service does not specify a Configuration")
	}
}