package lxd

import (
	"fmt"
	"github.com/mitchellh/multistep"
	"github.com/mitchellh/packer/packer"
	"regexp"
)

type stepPublish struct{}

func (s *stepPublish) Run(state multistep.StateBag) multistep.StepAction {
	config := state.Get("config").(*Config)
	ui := state.Get("ui").(packer.Ui)

	name := config.ContainerName

	args := []string{
		// If we use `lxc stop <container>`, an ephemeral container would die forever.
		// `lxc publish` has special logic to handle this case.
		"publish", "--force", name, "--alias", config.OutputImage,
	}

	ui.Say("Publishing container...")
	stdoutString, err := LXDCommand(args...)
	if err != nil {
		err := fmt.Errorf("Error publishing container: %s", err)
		state.Put("error", err)
		ui.Error(err.Error())
		return multistep.ActionHalt
	}

	r := regexp.MustCompile("([0-9a-fA-F]+)$")
	fingerprint := r.FindAllStringSubmatch(stdoutString, -1)[0][0]

	ui.Say(fmt.Sprintf("Created image: %s", fingerprint))

	state.Put("imageFingerprint", fingerprint)

	return multistep.ActionContinue
}

func (s *stepPublish) Cleanup(state multistep.StateBag) {}