package lxd

import (
	"bytes"
	"fmt"
	"github.com/mitchellh/multistep"
	"github.com/mitchellh/packer/packer"
	"log"
	"os/exec"
	"strings"
)

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

	commands := [][]string{
		{"lxc", "stop", "--force", name},
		{"lxc", "publish", name, "--alias", config.OutputImage},
	}

	ui.Say("Publishing container...")
	for _, command := range commands {
		err := s.SudoCommand(command...)
		if err != nil {
			err := fmt.Errorf("Error publishing container: %s", err)
			state.Put("error", err)
			ui.Error(err.Error())
			return multistep.ActionHalt
		}
	}

	return multistep.ActionContinue
}

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

func (s *stepPublish) SudoCommand(args ...string) error {
	var stdout, stderr bytes.Buffer

	log.Printf("Executing sudo command: %#v", args)
	cmd := exec.Command("sudo", args...)
	cmd.Stdout = &stdout
	cmd.Stderr = &stderr
	err := cmd.Run()

	stdoutString := strings.TrimSpace(stdout.String())
	stderrString := strings.TrimSpace(stderr.String())

	if _, ok := err.(*exec.ExitError); ok {
		err = fmt.Errorf("Sudo command error: %s", stderrString)
	}

	log.Printf("stdout: %s", stdoutString)
	log.Printf("stderr: %s", stderrString)

	return err
}