/*
Copyright 2014 Google Inc. All rights reserved.

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 meta

import (
	"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
)

// VersionInterfaces contains the interfaces one should use for dealing with types of a particular version.
type VersionInterfaces struct {
	runtime.Codec
	runtime.ObjectConvertor
	MetadataAccessor
}

// Interface lets you work with object and list metadata from any of the versioned or
// internal API objects. Attempting to set or retrieve a field on an object that does
// not support that field (Name, UID, Namespace on lists) will be a no-op and return
// a default value.
type Interface interface {
	Namespace() string
	SetNamespace(namespace string)
	Name() string
	SetName(name string)
	UID() string
	SetUID(uid string)
	APIVersion() string
	SetAPIVersion(version string)
	Kind() string
	SetKind(kind string)
	ResourceVersion() string
	SetResourceVersion(version string)
	SelfLink() string
	SetSelfLink(selfLink string)
}

// MetadataAccessor lets you work with object and list metadata from any of the versioned or
// internal API objects. Attempting to set or retrieve a field on an object that does
// not support that field (Name, UID, Namespace on lists) will be a no-op and return
// a default value.
//
// MetadataAccessor exposes Interface in a way that can be used with multiple objects.
type MetadataAccessor interface {
	APIVersion(obj runtime.Object) (string, error)
	SetAPIVersion(obj runtime.Object, version string) error

	Kind(obj runtime.Object) (string, error)
	SetKind(obj runtime.Object, kind string) error

	Namespace(obj runtime.Object) (string, error)
	SetNamespace(obj runtime.Object, namespace string) error

	Name(obj runtime.Object) (string, error)
	SetName(obj runtime.Object, name string) error

	UID(obj runtime.Object) (string, error)
	SetUID(obj runtime.Object, uid string) error

	SelfLink(obj runtime.Object) (string, error)
	SetSelfLink(obj runtime.Object, selfLink string) error

	runtime.ResourceVersioner
}

// RESTMapping contains the information needed to deal with objects of a specific
// resource and kind in a RESTful manner.
type RESTMapping struct {
	// Resource is a string representing the name of this resource as a REST client would see it
	Resource string
	// APIVersion represents the APIVersion that represents the resource as presented. It is provided
	// for convenience for passing around a consistent mapping.
	APIVersion string
	Kind       string

	runtime.Codec
	runtime.ObjectConvertor
	MetadataAccessor
}

// RESTMapper allows clients to map resources to kind, and map kind and version
// to interfaces for manipulating those objects. It is primarily intended for
// consumers of Kubernetes compatible REST APIs as defined in docs/api-conventions.md.
type RESTMapper interface {
	VersionAndKindForResource(resource string) (defaultVersion, kind string, err error)
	RESTMapping(version, kind string) (*RESTMapping, error)
}