const TypeLayers = "layers"

type ChildConfig struct {
	ContainerID     string
	Author          string
	Comment         string
	DiffID          layer.DiffID
	ContainerConfig *container.Config
	Config          *container.Config
}

type Details struct {
	References  []reference.Named
	Size        int64
	Metadata    map[string]string
	Driver      string
	LastUpdated time.Time
}

type DigestWalkFunc func(id digest.Digest) error

type Exporter interface {
	Load(io.ReadCloser, io.Writer, bool) error
	// TODO: Load(net.Context, io.ReadCloser, <- chan StatusMessage) error
	Save([]string, io.Writer) error
}

type History = ocispec.History

type ID digest.Digest

type Image struct {
	V1Image

	// Parent is the ID of the parent image.
	//
	// Depending on how the image was created, this field may be empty and
	// is only set for images that were built/created locally. This field
	// is empty if the image was pulled from an image registry.
	Parent ID `json:"parent,omitempty"` //nolint:govet

	// RootFS contains information about the image's RootFS, including the
	// layer IDs.
	RootFS  *RootFS   `json:"rootfs,omitempty"`
	History []History `json:"history,omitempty"`

	// OsVersion is the version of the Operating System the image is built to
	// run on (especially for Windows).
	OSVersion  string   `json:"os.version,omitempty"`
	OSFeatures []string `json:"os.features,omitempty"`

	// Details holds additional details about image
	Details *Details `json:"-"`
	// contains filtered or unexported fields
}

type LayerGetReleaser interface {
	Get(layer.ChainID) (layer.Layer, error)
	Release(layer.Layer) ([]layer.Metadata, error)
}

type RootFS struct {
	Type    string         `json:"type"`
	DiffIDs []layer.DiffID `json:"diff_ids,omitempty"`
}

type Store interface {
	Create(config []byte) (ID, error)
	Get(id ID) (*Image, error)
	Delete(id ID) ([]layer.Metadata, error)
	Search(partialID string) (ID, error)
	SetParent(id ID, parent ID) error
	GetParent(id ID) (ID, error)
	SetLastUpdated(id ID) error
	GetLastUpdated(id ID) (time.Time, error)
	SetBuiltLocally(id ID) error
	IsBuiltLocally(id ID) (bool, error)
	Children(id ID) []ID
	Map() map[ID]*Image
	Heads() map[ID]*Image
	Len() int
}

type StoreBackend interface {
	Walk(f DigestWalkFunc) error
	Get(id digest.Digest) ([]byte, error)
	Set(data []byte) (digest.Digest, error)
	Delete(id digest.Digest) error
	SetMetadata(id digest.Digest, key string, data []byte) error
	GetMetadata(id digest.Digest, key string) ([]byte, error)
	DeleteMetadata(id digest.Digest, key string) error
}

type V1Image struct {
	// ID is a unique 64 character identifier of the image
	ID string `json:"id,omitempty"`

	// Parent is the ID of the parent image.
	//
	// Depending on how the image was created, this field may be empty and
	// is only set for images that were built/created locally. This field
	// is empty if the image was pulled from an image registry.
	Parent string `json:"parent,omitempty"`

	// Comment is an optional message that can be set when committing or
	// importing the image.
	Comment string `json:"comment,omitempty"`

	// Created is the timestamp at which the image was created
	Created *time.Time `json:"created"`

	// Container is the ID of the container that was used to create the image.
	//
	// Depending on how the image was created, this field may be empty.
	Container string `json:"container,omitempty"`

	// ContainerConfig is the configuration of the container that was committed
	// into the image.
	ContainerConfig container.Config `json:"container_config,omitempty"`

	// DockerVersion is the version of Docker that was used to build the image.
	//
	// Depending on how the image was created, this field may be empty.
	DockerVersion string `json:"docker_version,omitempty"`

	// Author is the name of the author that was specified when committing the
	// image, or as specified through MAINTAINER (deprecated) in the Dockerfile.
	Author string `json:"author,omitempty"`

	// Config is the configuration of the container received from the client.
	Config *container.Config `json:"config,omitempty"`

	// Architecture is the hardware CPU architecture that the image runs on.
	Architecture string `json:"architecture,omitempty"`

	// Variant is the CPU architecture variant (presently ARM-only).
	Variant string `json:"variant,omitempty"`

	// OS is the Operating System the image is built to run on.
	OS string `json:"os,omitempty"`

	// Size is the total size of the image including all layers it is composed of.
	Size int64 `json:",omitempty"`
}