package containerd

import (
	"os"
	"time"

	"github.com/docker/containerd/runtime"
	"github.com/opencontainers/specs"
)

type EventType string

const (
	ExecExitEventType         EventType = "execExit"
	ExitEventType             EventType = "exit"
	StartContainerEventType   EventType = "startContainer"
	DeleteEventType           EventType = "deleteContainerEvent"
	GetContainerEventType     EventType = "getContainer"
	SignalEventType           EventType = "signal"
	AddProcessEventType       EventType = "addProcess"
	UpdateContainerEventType  EventType = "updateContainer"
	CreateCheckpointEventType EventType = "createCheckpoint"
	DeleteCheckpointEventType EventType = "deleteCheckpoint"
)

func NewEvent(t EventType) *Event {
	return &Event{
		Type:      t,
		Timestamp: time.Now(),
		Err:       make(chan error, 1),
	}
}

type Event struct {
	Type       EventType           `json:"type"`
	Timestamp  time.Time           `json:"timestamp"`
	ID         string              `json:"id,omitempty"`
	BundlePath string              `json:"bundlePath,omitempty"`
	Stdio      *runtime.Stdio      `json:"stdio,omitempty"`
	Pid        int                 `json:"pid,omitempty"`
	Status     int                 `json:"status,omitempty"`
	Signal     os.Signal           `json:"signal,omitempty"`
	Process    *specs.Process      `json:"process,omitempty"`
	State      *runtime.State      `json:"state,omitempty"`
	Containers []runtime.Container `json:"-"`
	Checkpoint *runtime.Checkpoint `json:"checkpoint,omitempty"`
	Err        chan error          `json:"-"`
}

type Handler interface {
	Handle(*Event) error
}