var DefaultCommand = "runc"

var ErrParseRuncVersion = errors.New("unable to parse runc version")

type Blkio struct {
	IoServiceBytesRecursive []BlkioEntry `json:"ioServiceBytesRecursive,omitempty"`
	IoServicedRecursive     []BlkioEntry `json:"ioServicedRecursive,omitempty"`
	IoQueuedRecursive       []BlkioEntry `json:"ioQueueRecursive,omitempty"`
	IoServiceTimeRecursive  []BlkioEntry `json:"ioServiceTimeRecursive,omitempty"`
	IoWaitTimeRecursive     []BlkioEntry `json:"ioWaitTimeRecursive,omitempty"`
	IoMergedRecursive       []BlkioEntry `json:"ioMergedRecursive,omitempty"`
	IoTimeRecursive         []BlkioEntry `json:"ioTimeRecursive,omitempty"`
	SectorsRecursive        []BlkioEntry `json:"sectorsRecursive,omitempty"`
}

type BlkioEntry struct {
	Major uint64 `json:"major,omitempty"`
	Minor uint64 `json:"minor,omitempty"`
	Op    string `json:"op,omitempty"`
	Value uint64 `json:"value,omitempty"`
}

type CgroupMode string

const (
	// Soft is the "soft" cgroup mode
	Soft CgroupMode = "soft"
	// Full is the "full" cgroup mode
	Full CgroupMode = "full"
	// Strict is the "strict" cgroup mode
	Strict CgroupMode = "strict"
)

type CheckpointAction func([]string) []string

type CheckpointOpts struct {
	// ImagePath is the path for saving the criu image file
	ImagePath string
	// WorkDir is the working directory for criu
	WorkDir string
	// ParentPath is the path for previous image files from a pre-dump
	ParentPath string
	// AllowOpenTCP allows open tcp connections to be checkpointed
	AllowOpenTCP bool
	// AllowExternalUnixSockets allows external unix sockets to be checkpointed
	AllowExternalUnixSockets bool
	// AllowTerminal allows the terminal(pty) to be checkpointed with a container
	AllowTerminal bool
	// CriuPageServer is the address:port for the criu page server
	CriuPageServer string
	// FileLocks handle file locks held by the container
	FileLocks bool
	// Cgroups is the cgroup mode for how to handle the checkpoint of a container's cgroups
	Cgroups CgroupMode
	// EmptyNamespaces creates a namespace for the container but does not save its properties
	// Provide the namespaces you wish to be checkpointed without their settings on restore
	EmptyNamespaces []string
	// LazyPages uses userfaultfd to lazily restore memory pages
	LazyPages bool
	// StatusFile is the file criu writes \0 to once lazy-pages is ready
	StatusFile *os.File
	ExtraArgs  []string
}

type ConsoleSocket interface {
	Path() string
}

type Container struct {
	ID          string            `json:"id"`
	Pid         int               `json:"pid"`
	Status      string            `json:"status"`
	Bundle      string            `json:"bundle"`
	Rootfs      string            `json:"rootfs"`
	Created     time.Time         `json:"created"`
	Annotations map[string]string `json:"annotations"`
}

type Cpu struct {
	Usage      CpuUsage   `json:"usage,omitempty"`
	Throttling Throttling `json:"throttling,omitempty"`
}

type CpuUsage struct {
	// Units: nanoseconds.
	Total  uint64   `json:"total,omitempty"`
	Percpu []uint64 `json:"percpu,omitempty"`
	Kernel uint64   `json:"kernel"`
	User   uint64   `json:"user"`
}

type CreateOpts struct {
	IO
	// PidFile is a path to where a pid file should be created
	PidFile       string
	ConsoleSocket ConsoleSocket
	Detach        bool
	NoPivot       bool
	NoNewKeyring  bool
	ExtraFiles    []*os.File
	Started       chan<- int
	ExtraArgs     []string
}

type DeleteOpts struct {
	Force     bool
	ExtraArgs []string
}

type Event struct {
	// Type are the event type generated by runc
	// If the type is "error" then check the Err field on the event for
	// the actual error
	Type  string `json:"type"`
	ID    string `json:"id"`
	Stats *Stats `json:"data,omitempty"`
	// Err has a read error if we were unable to decode the event from runc
	Err error `json:"-"`
}

type ExecOpts struct {
	IO
	PidFile       string
	ConsoleSocket ConsoleSocket
	Detach        bool
	Started       chan<- int
	ExtraArgs     []string
}

type Exit struct {
	Timestamp time.Time
	Pid       int
	Status    int
}

type ExitError struct {
	Status int
}

type Format string

const (

	// JSON represents the JSON format
	JSON Format = "json"
	// Text represents plain text format
	Text Format = "text"
)

type Hugetlb struct {
	Usage   uint64 `json:"usage,omitempty"`
	Max     uint64 `json:"max,omitempty"`
	Failcnt uint64 `json:"failcnt"`
}

type IO interface {
	io.Closer
	Stdin() io.WriteCloser
	Stdout() io.ReadCloser
	Stderr() io.ReadCloser
	Set(*exec.Cmd)
}

type IOOpt func(*IOOption)

type IOOption struct {
	OpenStdin  bool
	OpenStdout bool
	OpenStderr bool
}

type KillOpts struct {
	All       bool
	ExtraArgs []string
}

type Memory struct {
	Cache     uint64            `json:"cache,omitempty"`
	Usage     MemoryEntry       `json:"usage,omitempty"`
	Swap      MemoryEntry       `json:"swap,omitempty"`
	Kernel    MemoryEntry       `json:"kernel,omitempty"`
	KernelTCP MemoryEntry       `json:"kernelTCP,omitempty"`
	Raw       map[string]uint64 `json:"raw,omitempty"`
}

type MemoryEntry struct {
	Limit   uint64 `json:"limit"`
	Usage   uint64 `json:"usage,omitempty"`
	Max     uint64 `json:"max,omitempty"`
	Failcnt uint64 `json:"failcnt"`
}

type Pids struct {
	Current uint64 `json:"current,omitempty"`
	Limit   uint64 `json:"limit,omitempty"`
}

type ProcessMonitor interface {
	Start(*exec.Cmd) (chan Exit, error)
	StartLocked(*exec.Cmd) (chan Exit, error)
	Wait(*exec.Cmd, chan Exit) (int, error)
}

var Monitor ProcessMonitor = &defaultMonitor{}

type RestoreOpts struct {
	CheckpointOpts
	IO

	Detach        bool
	PidFile       string
	NoSubreaper   bool
	NoPivot       bool
	ConsoleSocket ConsoleSocket
	ExtraArgs     []string
}

type Runc struct {
	// Command overrides the name of the runc binary. If empty, DefaultCommand
	// is used.
	Command   string
	Root      string
	Debug     bool
	Log       string
	LogFormat Format
	// PdeathSignal sets a signal the child process will receive when the
	// parent dies.
	//
	// When Pdeathsig is set, command invocations will call runtime.LockOSThread
	// to prevent OS thread termination from spuriously triggering the
	// signal. See https://github.com/golang/go/issues/27505 and
	// https://github.com/golang/go/blob/126c22a09824a7b52c019ed9a1d198b4e7781676/src/syscall/exec_linux.go#L48-L51
	//
	// A program with GOMAXPROCS=1 might hang because of the use of
	// runtime.LockOSThread. Callers should ensure they retain at least one
	// unlocked thread.
	PdeathSignal syscall.Signal // using syscall.Signal to allow compilation on non-unix (unix.Syscall is an alias for syscall.Signal)
	Setpgid      bool

	// Criu sets the path to the criu binary used for checkpoint and restore.
	//
	// Deprecated: runc option --criu is now ignored (with a warning), and the
	// option will be removed entirely in a future release. Users who need a non-
	// standard criu binary should rely on the standard way of looking up binaries
	// in $PATH.
	Criu          string
	SystemdCgroup bool
	Rootless      *bool // nil stands for "auto"
	ExtraArgs     []string
}

type Socket struct {
	// contains filtered or unexported fields
}

type StartCloser interface {
	CloseAfterStart() error
}

type Stats struct {
	Cpu     Cpu                `json:"cpu"` //revive:disable
	Memory  Memory             `json:"memory"`
	Pids    Pids               `json:"pids"`
	Blkio   Blkio              `json:"blkio"`
	Hugetlb map[string]Hugetlb `json:"hugetlb"`
}

type Throttling struct {
	Periods          uint64 `json:"periods,omitempty"`
	ThrottledPeriods uint64 `json:"throttledPeriods,omitempty"`
	ThrottledTime    uint64 `json:"throttledTime,omitempty"`
}

type TopResults struct {
	// Processes running in the container, where each is process is an array of values corresponding to the headers
	Processes [][]string `json:"Processes"`

	// Headers are the names of the columns
	Headers []string `json:"Headers"`
}

type Version struct {
	Runc   string
	Commit string
	Spec   string
}