type Config struct {
	AttachStderr    bool                `json:"AttachStderr,omitempty"`
	AttachStdin     bool                `json:"AttachStdin,omitempty"`
	AttachStdout    bool                `json:"AttachStdout,omitempty"`
	Cmd             []string            `json:"Cmd,omitempty"`
	Healthcheck     *HealthConfig       `json:"Healthcheck,omitempty"`
	Domainname      string              `json:"Domainname,omitempty"`
	Entrypoint      []string            `json:"Entrypoint,omitempty"`
	Env             []string            `json:"Env,omitempty"`
	Hostname        string              `json:"Hostname,omitempty"`
	Image           string              `json:"Image,omitempty"`
	Labels          map[string]string   `json:"Labels,omitempty"`
	OnBuild         []string            `json:"OnBuild,omitempty"`
	OpenStdin       bool                `json:"OpenStdin,omitempty"`
	StdinOnce       bool                `json:"StdinOnce,omitempty"`
	Tty             bool                `json:"Tty,omitempty"`
	User            string              `json:"User,omitempty"`
	Volumes         map[string]struct{} `json:"Volumes,omitempty"`
	WorkingDir      string              `json:"WorkingDir,omitempty"`
	ExposedPorts    map[string]struct{} `json:"ExposedPorts,omitempty"`
	ArgsEscaped     bool                `json:"ArgsEscaped,omitempty"`
	NetworkDisabled bool                `json:"NetworkDisabled,omitempty"`
	MacAddress      string              `json:"MacAddress,omitempty"`
	StopSignal      string              `json:"StopSignal,omitempty"`
	Shell           []string            `json:"Shell,omitempty"`
}

type ConfigFile struct {
	Architecture  string    `json:"architecture"`
	Author        string    `json:"author,omitempty"`
	Container     string    `json:"container,omitempty"`
	Created       Time      `json:"created,omitempty"`
	DockerVersion string    `json:"docker_version,omitempty"`
	History       []History `json:"history,omitempty"`
	OS            string    `json:"os"`
	RootFS        RootFS    `json:"rootfs"`
	Config        Config    `json:"config"`
	OSVersion     string    `json:"os.version,omitempty"`
}

type Descriptor struct {
	MediaType   types.MediaType   `json:"mediaType"`
	Size        int64             `json:"size"`
	Digest      Hash              `json:"digest"`
	URLs        []string          `json:"urls,omitempty"`
	Annotations map[string]string `json:"annotations,omitempty"`
	Platform    *Platform         `json:"platform,omitempty"`
}

type Hash struct {
	// Algorithm holds the algorithm used to compute the hash.
	Algorithm string

	// Hex holds the hex portion of the content hash.
	Hex string
}

type HealthConfig struct {
	// Test is the test to perform to check that the container is healthy.
	// An empty slice means to inherit the default.
	// The options are:
	// {} : inherit healthcheck
	// {"NONE"} : disable healthcheck
	// {"CMD", args...} : exec arguments directly
	// {"CMD-SHELL", command} : run command with system's default shell
	Test []string `json:",omitempty"`

	// Zero means to inherit. Durations are expressed as integer nanoseconds.
	Interval    time.Duration `json:",omitempty"` // Interval is the time to wait between checks.
	Timeout     time.Duration `json:",omitempty"` // Timeout is the time to wait before considering the check to have hung.
	StartPeriod time.Duration `json:",omitempty"` // The start period for the container to initialize before the retries starts to count down.

	// Retries is the number of consecutive failures needed to consider a container as unhealthy.
	// Zero means inherit.
	Retries int `json:",omitempty"`
}

type History struct {
	Author     string `json:"author,omitempty"`
	Created    Time   `json:"created,omitempty"`
	CreatedBy  string `json:"created_by,omitempty"`
	Comment    string `json:"comment,omitempty"`
	EmptyLayer bool   `json:"empty_layer,omitempty"`
}

type Image interface {
	// Layers returns the ordered collection of filesystem layers that comprise this image.
	// The order of the list is oldest/base layer first, and most-recent/top layer last.
	Layers() ([]Layer, error)

	// MediaType of this image's manifest.
	MediaType() (types.MediaType, error)

	// Size returns the size of the manifest.
	Size() (int64, error)

	// ConfigName returns the hash of the image's config file, also known as
	// the Image ID.
	ConfigName() (Hash, error)

	// ConfigFile returns this image's config file.
	ConfigFile() (*ConfigFile, error)

	// RawConfigFile returns the serialized bytes of ConfigFile().
	RawConfigFile() ([]byte, error)

	// Digest returns the sha256 of this image's manifest.
	Digest() (Hash, error)

	// Manifest returns this image's Manifest object.
	Manifest() (*Manifest, error)

	// RawManifest returns the serialized bytes of Manifest()
	RawManifest() ([]byte, error)

	// LayerByDigest returns a Layer for interacting with a particular layer of
	// the image, looking it up by "digest" (the compressed hash).
	LayerByDigest(Hash) (Layer, error)

	// LayerByDiffID is an analog to LayerByDigest, looking up by "diff id"
	// (the uncompressed hash).
	LayerByDiffID(Hash) (Layer, error)
}

type ImageIndex interface {
	// MediaType of this image's manifest.
	MediaType() (types.MediaType, error)

	// Digest returns the sha256 of this index's manifest.
	Digest() (Hash, error)

	// Size returns the size of the manifest.
	Size() (int64, error)

	// IndexManifest returns this image index's manifest object.
	IndexManifest() (*IndexManifest, error)

	// RawManifest returns the serialized bytes of IndexManifest().
	RawManifest() ([]byte, error)

	// Image returns a v1.Image that this ImageIndex references.
	Image(Hash) (Image, error)

	// ImageIndex returns a v1.ImageIndex that this ImageIndex references.
	ImageIndex(Hash) (ImageIndex, error)
}

type IndexManifest struct {
	SchemaVersion int64             `json:"schemaVersion"`
	MediaType     types.MediaType   `json:"mediaType,omitempty"`
	Manifests     []Descriptor      `json:"manifests"`
	Annotations   map[string]string `json:"annotations,omitempty"`
}

type Layer interface {
	// Digest returns the Hash of the compressed layer.
	Digest() (Hash, error)

	// DiffID returns the Hash of the uncompressed layer.
	DiffID() (Hash, error)

	// Compressed returns an io.ReadCloser for the compressed layer contents.
	Compressed() (io.ReadCloser, error)

	// Uncompressed returns an io.ReadCloser for the uncompressed layer contents.
	Uncompressed() (io.ReadCloser, error)

	// Size returns the compressed size of the Layer.
	Size() (int64, error)

	// MediaType returns the media type of the Layer.
	MediaType() (types.MediaType, error)
}

type Manifest struct {
	SchemaVersion int64             `json:"schemaVersion,omitempty"`
	MediaType     types.MediaType   `json:"mediaType"`
	Config        Descriptor        `json:"config"`
	Layers        []Descriptor      `json:"layers"`
	Annotations   map[string]string `json:"annotations,omitempty"`
}

type Platform struct {
	Architecture string   `json:"architecture"`
	OS           string   `json:"os"`
	OSVersion    string   `json:"os.version,omitempty"`
	OSFeatures   []string `json:"os.features,omitempty"`
	Variant      string   `json:"variant,omitempty"`
	Features     []string `json:"features,omitempty"`
}

type RootFS struct {
	Type    string `json:"type"`
	DiffIDs []Hash `json:"diff_ids"`
}

type Time struct {
	time.Time
}

type Update struct {
	Total    int64
	Complete int64
	Error    error
}