package types

import (
	"bufio"
	"io"
	"net"

	"github.com/docker/engine-api/types/container"
	"github.com/docker/engine-api/types/filters"
	"github.com/docker/go-units"
)

// ContainerAttachOptions holds parameters to attach to a container.
type ContainerAttachOptions struct {
	Stream     bool
	Stdin      bool
	Stdout     bool
	Stderr     bool
	DetachKeys string
}

// ContainerCommitOptions holds parameters to commit changes into a container.
type ContainerCommitOptions struct {
	Reference string
	Comment   string
	Author    string
	Changes   []string
	Pause     bool
	Config    *container.Config
}

// ContainerExecInspect holds information returned by exec inspect.
type ContainerExecInspect struct {
	ExecID      string
	ContainerID string
	Running     bool
	ExitCode    int
}

// ContainerListOptions holds parameters to list containers with.
type ContainerListOptions struct {
	Quiet  bool
	Size   bool
	All    bool
	Latest bool
	Since  string
	Before string
	Limit  int
	Filter filters.Args
}

// ContainerLogsOptions holds parameters to filter logs with.
type ContainerLogsOptions struct {
	ShowStdout bool
	ShowStderr bool
	Since      string
	Timestamps bool
	Follow     bool
	Tail       string
}

// ContainerRemoveOptions holds parameters to remove containers.
type ContainerRemoveOptions struct {
	RemoveVolumes bool
	RemoveLinks   bool
	Force         bool
}

// CopyToContainerOptions holds information
// about files to copy into a container
type CopyToContainerOptions struct {
	AllowOverwriteDirWithFile bool
}

// EventsOptions hold parameters to filter events with.
type EventsOptions struct {
	Since   string
	Until   string
	Filters filters.Args
}

// NetworkListOptions holds parameters to filter the list of networks with.
type NetworkListOptions struct {
	Filters filters.Args
}

// HijackedResponse holds connection information for a hijacked request.
type HijackedResponse struct {
	Conn   net.Conn
	Reader *bufio.Reader
}

// Close closes the hijacked connection and reader.
func (h *HijackedResponse) Close() {
	h.Conn.Close()
}

// CloseWriter is an interface that implements structs
// that close input streams to prevent from writing.
type CloseWriter interface {
	CloseWrite() error
}

// CloseWrite closes a readWriter for writing.
func (h *HijackedResponse) CloseWrite() error {
	if conn, ok := h.Conn.(CloseWriter); ok {
		return conn.CloseWrite()
	}
	return nil
}

// ImageBuildOptions holds the information
// necessary to build images.
type ImageBuildOptions struct {
	Tags           []string
	SuppressOutput bool
	RemoteContext  string
	NoCache        bool
	Remove         bool
	ForceRemove    bool
	PullParent     bool
	Isolation      container.Isolation
	CPUSetCPUs     string
	CPUSetMems     string
	CPUShares      int64
	CPUQuota       int64
	CPUPeriod      int64
	Memory         int64
	MemorySwap     int64
	CgroupParent   string
	ShmSize        int64
	Dockerfile     string
	Ulimits        []*units.Ulimit
	BuildArgs      map[string]string
	AuthConfigs    map[string]AuthConfig
	Context        io.Reader
	Labels         map[string]string
}

// ImageBuildResponse holds information
// returned by a server after building
// an image.
type ImageBuildResponse struct {
	Body   io.ReadCloser
	OSType string
}

// ImageCreateOptions holds information to create images.
type ImageCreateOptions struct {
	RegistryAuth string // RegistryAuth is the base64 encoded credentials for the registry
}

// ImageImportSource holds source information for ImageImport
type ImageImportSource struct {
	Source     io.Reader // Source is the data to send to the server to create this image from (mutually exclusive with SourceName)
	SourceName string    // SourceName is the name of the image to pull (mutually exclusive with Source)
}

// ImageImportOptions holds information to import images from the client host.
type ImageImportOptions struct {
	Tag     string   // Tag is the name to tag this image with. This attribute is deprecated.
	Message string   // Message is the message to tag the image with
	Changes []string // Changes are the raw changes to apply to this image
}

// ImageListOptions holds parameters to filter the list of images with.
type ImageListOptions struct {
	MatchName string
	All       bool
	Filters   filters.Args
}

// ImageLoadResponse returns information to the client about a load process.
type ImageLoadResponse struct {
	Body io.ReadCloser
	JSON bool
}

// ImagePullOptions holds information to pull images.
type ImagePullOptions struct {
	RegistryAuth  string // RegistryAuth is the base64 encoded credentials for the registry
	PrivilegeFunc RequestPrivilegeFunc
}

// RequestPrivilegeFunc is a function interface that
// clients can supply to retry operations after
// getting an authorization error.
// This function returns the registry authentication
// header value in base 64 format, or an error
// if the privilege request fails.
type RequestPrivilegeFunc func() (string, error)

//ImagePushOptions holds information to push images.
type ImagePushOptions ImagePullOptions

// ImageRemoveOptions holds parameters to remove images.
type ImageRemoveOptions struct {
	Force         bool
	PruneChildren bool
}

// ImageSearchOptions holds parameters to search images with.
type ImageSearchOptions struct {
	RegistryAuth  string
	PrivilegeFunc RequestPrivilegeFunc
}

// ImageTagOptions holds parameters to tag an image
type ImageTagOptions struct {
	Force bool
}

// ResizeOptions holds parameters to resize a tty.
// It can be used to resize container ttys and
// exec process ttys too.
type ResizeOptions struct {
	Height int
	Width  int
}

// VersionResponse holds version information for the client and the server
type VersionResponse struct {
	Client *Version
	Server *Version
}

// ServerOK returns true when the client could connect to the docker server
// and parse the information received. It returns false otherwise.
func (v VersionResponse) ServerOK() bool {
	return v.Server != nil
}
