package digitalocean

import (
	"errors"
	"fmt"
	"log"

	"github.com/mitchellh/multistep"
	"github.com/mitchellh/packer/packer"
)

type stepSnapshot struct{}

func (s *stepSnapshot) Run(state multistep.StateBag) multistep.StepAction {
	client := state.Get("client").(DigitalOceanClient)
	ui := state.Get("ui").(packer.Ui)
	c := state.Get("config").(Config)
	dropletId := state.Get("droplet_id").(uint)

	ui.Say(fmt.Sprintf("Creating snapshot: %v", c.SnapshotName))
	err := client.CreateSnapshot(dropletId, c.SnapshotName)
	if err != nil {
		err := fmt.Errorf("Error creating snapshot: %s", err)
		state.Put("error", err)
		ui.Error(err.Error())
		return multistep.ActionHalt
	}

	ui.Say("Waiting for snapshot to complete...")
	err = waitForDropletState("active", dropletId, client, c.stateTimeout)
	if err != nil {
		err := fmt.Errorf("Error waiting for snapshot to complete: %s", err)
		state.Put("error", err)
		ui.Error(err.Error())
		return multistep.ActionHalt
	}

	log.Printf("Looking up snapshot ID for snapshot: %s", c.SnapshotName)
	images, err := client.Images()
	if err != nil {
		err := fmt.Errorf("Error looking up snapshot ID: %s", err)
		state.Put("error", err)
		ui.Error(err.Error())
		return multistep.ActionHalt
	}

	var imageId uint
	for _, image := range images {
		if image.Name == c.SnapshotName {
			imageId = image.Id
			break
		}
	}

	if imageId == 0 {
		err := errors.New("Couldn't find snapshot to get the image ID. Bug?")
		state.Put("error", err)
		ui.Error(err.Error())
		return multistep.ActionHalt
	}

	log.Printf("Snapshot image ID: %d", imageId)

	state.Put("snapshot_image_id", imageId)
	state.Put("snapshot_name", c.SnapshotName)
	state.Put("region", c.Region)

	return multistep.ActionContinue
}

func (s *stepSnapshot) Cleanup(state multistep.StateBag) {
	// no cleanup
}