package common

import (
	"context"
	"fmt"

	"github.com/hashicorp/packer/helper/multistep"
	"github.com/hashicorp/packer/packer"
)

// StepRun is a step that starts the virtual machine.
//
// Uses:
//   driver Driver
//   ui packer.Ui
//   vmName string
//
// Produces:
type StepRun struct {
	vmName string
}

// Run starts the VM.
func (s *StepRun) Run(ctx context.Context, state multistep.StateBag) multistep.StepAction {
	driver := state.Get("driver").(Driver)
	ui := state.Get("ui").(packer.Ui)
	vmName := state.Get("vmName").(string)

	ui.Say("Starting the virtual machine...")
	command := []string{"start", vmName}
	if err := driver.Prlctl(command...); err != nil {
		err = fmt.Errorf("Error starting VM: %s", err)
		state.Put("error", err)
		ui.Error(err.Error())
		return multistep.ActionHalt
	}

	s.vmName = vmName
	// instance_id is the generic term used so that users can have access to the
	// instance id inside of the provisioners, used in step_provision.
	state.Put("instance_id", vmName)

	return multistep.ActionContinue
}

// Cleanup stops the VM.
func (s *StepRun) Cleanup(state multistep.StateBag) {
	if s.vmName == "" {
		return
	}

	driver := state.Get("driver").(Driver)
	ui := state.Get("ui").(packer.Ui)

	if running, _ := driver.IsRunning(s.vmName); running {
		if err := driver.Stop(s.vmName); err != nil {
			ui.Error(fmt.Sprintf("Error stopping VM: %s", err))
		}
	}
}