// AddKnownTypes registers all types passed in 'types' as being members of version 'version'.
// Encode() will refuse objects unless their type has been registered with AddKnownTypes.
// All objects passed to types should be pointers to structs. The name that go reports for
// the struct becomes the "kind" field when encoding.
func (s *Scheme) AddKnownTypes(gv unversioned.GroupVersion, types ...interface{}) {
	for _, obj := range types {
		t := reflect.TypeOf(obj)
		if t.Kind() != reflect.Ptr {
			panic("All types must be pointers to structs.")
		}
		t = t.Elem()
		if t.Kind() != reflect.Struct {
			panic("All types must be pointers to structs.")
		}

		gvk := gv.WithKind(t.Name())
		s.gvkToType[gvk] = t
		s.typeToGVK[t] = append(s.typeToGVK[t], gvk)
	}
}

// DecodeToVersion converts a JSON string back into a pointer to an api object.
// Deduces the type based upon the fields added by the MetaInsertionFactory
// technique. The object will be converted, if necessary, into the versioned
// type before being returned. Decode will not decode objects without version
// set unless version is also "".
// a GroupVersion with .IsEmpty() == true is means "use the internal version for
// the object's group"
func (s *Scheme) DecodeToVersion(data []byte, gv unversioned.GroupVersion) (interface{}, error) {
	obj, sourceVersion, kind, err := s.DecodeToVersionedObject(data)
	if err != nil {
		return nil, err
	}
	// Version and Kind should be blank in memory.
	if err := s.SetVersionAndKind("", "", obj); err != nil {
		return nil, err
	}

	sourceGV, err := unversioned.ParseGroupVersion(sourceVersion)
	if err != nil {
		return nil, err
	}

	// if the gv is empty, then we want the internal version, but the internal version varies by
	// group.  We can lookup the group now because we have knowledge of the group
	if gv.IsEmpty() {
		exists := false
		gv, exists = s.InternalVersions[sourceGV.Group]
		if !exists {
			return nil, fmt.Errorf("no internalVersion specified for %v", gv)
		}
	}

	// Convert if needed.
	if gv != sourceGV {
		objOut, err := s.NewObject(gv.String(), kind)
		if err != nil {
			return nil, err
		}
		flags, meta := s.generateConvertMeta(sourceVersion, gv.String(), obj)
		if err := s.converter.Convert(obj, objOut, flags, meta); err != nil {
			return nil, err
		}
		obj = objOut
	}
	return obj, nil
}

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 v1alpha1

import (
	"github.com/jordic/k8s/cloudsqlip/Godeps/_workspace/src/k8s.io/kubernetes/pkg/api"
	"github.com/jordic/k8s/cloudsqlip/Godeps/_workspace/src/k8s.io/kubernetes/pkg/api/unversioned"
	"github.com/jordic/k8s/cloudsqlip/Godeps/_workspace/src/k8s.io/kubernetes/pkg/runtime"
)

// SchemeGroupVersion is group version used to register these objects
var SchemeGroupVersion = unversioned.GroupVersion{Group: "metrics", Version: "v1alpha1"}

var Codec = runtime.CodecFor(api.Scheme, SchemeGroupVersion.String())

func init() {
	// Register the API.
	addKnownTypes()
}

// Adds the list of known types to api.Scheme.
func addKnownTypes() {
	api.Scheme.AddKnownTypes(SchemeGroupVersion,
		&RawNode{},
		&RawPod{},
	)
}

// NegotiateVersion queries the server's supported api versions to find
// a version that both client and server support.
// - If no version is provided, try registered client versions in order of
//   preference.
// - If version is provided, but not default config (explicitly requested via
//   commandline flag), and is unsupported by the server, print a warning to
//   stderr and try client's registered versions in order of preference.
// - If version is config default, and the server does not support it,
//   return an error.
func NegotiateVersion(client *Client, c *Config, requestedGV *unversioned.GroupVersion, clientRegisteredGVs []unversioned.GroupVersion) (*unversioned.GroupVersion, error) {
	var err error
	if client == nil {
		client, err = New(c)
		if err != nil {
			return nil, err
		}
	}
	clientVersions := sets.String{}
	for _, gv := range clientRegisteredGVs {
		clientVersions.Insert(gv.String())
	}
	apiVersions, err := client.ServerAPIVersions()
	if err != nil {
		// This is almost always a connection error, and higher level code should treat this as a generic error,
		// not a negotiation specific error.
		return nil, err
	}
	serverVersions := sets.String{}
	for _, v := range apiVersions.Versions {
		serverVersions.Insert(v)
	}

	// If no version requested, use config version (may also be empty).
	// make a copy of the original so we don't risk mutating input here or in the returned value
	var preferredGV *unversioned.GroupVersion
	switch {
	case requestedGV != nil:
		t := *requestedGV
		preferredGV = &t
	case c.GroupVersion != nil:
		t := *c.GroupVersion
		preferredGV = &t
	}

	// If version explicitly requested verify that both client and server support it.
	// If server does not support warn, but try to negotiate a lower version.
	if preferredGV != nil {
		if !clientVersions.Has(preferredGV.String()) {
			return nil, fmt.Errorf("client does not support API version %q; client supported API versions: %v", preferredGV, clientVersions)

		}
		if serverVersions.Has(preferredGV.String()) {
			return preferredGV, nil
		}
		// If we are using an explicit config version the server does not support, fail.
		if (c.GroupVersion != nil) && (*preferredGV == *c.GroupVersion) {
			return nil, fmt.Errorf("server does not support API version %q", preferredGV)
		}
	}

	for _, clientGV := range clientRegisteredGVs {
		if serverVersions.Has(clientGV.String()) {
			// Version was not explicitly requested in command config (--api-version).
			// Ok to fall back to a supported version with a warning.
			// TODO: caesarxuchao: enable the warning message when we have
			// proper fix. Please refer to issue #14895.
			// if len(version) != 0 {
			// 	glog.Warningf("Server does not support API version '%s'. Falling back to '%s'.", version, clientVersion)
			// }
			t := clientGV
			return &t, nil
		}
	}
	return nil, fmt.Errorf("failed to negotiate an api version; server supports: %v, client supports: %v",
		serverVersions, clientVersions)
}