// ImageMetadataStorage returns a Storage object pointing where the goose
// infrastructure sets up its keystone entry for image metadata
func ImageMetadataStorage(e environs.Environ) envstorage.Storage {
	env := e.(*environ)
	return &openstackstorage{
		containerName: "imagemetadata",
		swift:         swift.New(env.client),
	}
}

// CreateCustomStorage creates a swift container and returns the Storage object
// so you can put data into it.
func CreateCustomStorage(e environs.Environ, containerName string) envstorage.Storage {
	env := e.(*environ)
	swiftClient := swift.New(env.client)
	if err := swiftClient.CreateContainer(containerName, swift.PublicRead); err != nil {
		panic(err)
	}
	return &openstackstorage{
		containerName: containerName,
		swift:         swiftClient,
	}
}

// MetadataStorage returns a Storage instance which is used to store simplestreams metadata for tests.
func MetadataStorage(e environs.Environ) envstorage.Storage {
	ecfg := e.(*environ).ecfg()
	container := "juju-dist-test"
	metadataStorage := &openstackstorage{
		containerName: container,
		swift:         swift.New(authClient(ecfg)),
	}

	// Ensure the container exists.
	err := metadataStorage.makeContainer(container, swift.PublicRead)
	if err != nil {
		panic(fmt.Errorf("cannot create %s container: %v", container, err))
	}
	return metadataStorage
}