// Package extensions contains common functions for creating block storage
// resources that are extensions of the block storage API. See the `*_test.go`
// files for example usages.
package extensions

import (
	"testing"

	"github.com/gophercloud/gophercloud"
	"github.com/gophercloud/gophercloud/acceptance/tools"
	"github.com/gophercloud/gophercloud/openstack/blockstorage/extensions/backups"
	"github.com/gophercloud/gophercloud/openstack/blockstorage/extensions/volumeactions"
	"github.com/gophercloud/gophercloud/openstack/blockstorage/v2/volumes"
	"github.com/gophercloud/gophercloud/openstack/compute/v2/images"
	"github.com/gophercloud/gophercloud/openstack/compute/v2/servers"
	th "github.com/gophercloud/gophercloud/testhelper"
)

// CreateUploadImage will upload volume it as volume-baked image. An name of new image or err will be
// returned
func CreateUploadImage(t *testing.T, client *gophercloud.ServiceClient, volume *volumes.Volume) (volumeactions.VolumeImage, error) {
	if testing.Short() {
		t.Skip("Skipping test that requires volume-backed image uploading in short mode.")
	}

	imageName := tools.RandomString("ACPTTEST", 16)
	uploadImageOpts := volumeactions.UploadImageOpts{
		ImageName: imageName,
		Force:     true,
	}

	volumeImage, err := volumeactions.UploadImage(client, volume.ID, uploadImageOpts).Extract()
	if err != nil {
		return volumeImage, err
	}

	t.Logf("Uploading volume %s as volume-backed image %s", volume.ID, imageName)

	if err := volumes.WaitForStatus(client, volume.ID, "available", 60); err != nil {
		return volumeImage, err
	}

	t.Logf("Uploaded volume %s as volume-backed image %s", volume.ID, imageName)

	return volumeImage, nil

}

// DeleteUploadedImage deletes uploaded image. An error will be returned
// if the deletion request failed.
func DeleteUploadedImage(t *testing.T, client *gophercloud.ServiceClient, imageName string) error {
	if testing.Short() {
		t.Skip("Skipping test that requires volume-backed image removing in short mode.")
	}

	t.Logf("Getting image id for image name %s", imageName)

	imageID, err := images.IDFromName(client, imageName)
	if err != nil {
		return err
	}

	t.Logf("Removing image %s", imageID)

	err = images.Delete(client, imageID).ExtractErr()
	if err != nil {
		return err
	}

	return nil
}

// CreateVolumeAttach will attach a volume to an instance. An error will be
// returned if the attachment failed.
func CreateVolumeAttach(t *testing.T, client *gophercloud.ServiceClient, volume *volumes.Volume, server *servers.Server) error {
	if testing.Short() {
		t.Skip("Skipping test that requires volume attachment in short mode.")
	}

	attachOpts := volumeactions.AttachOpts{
		MountPoint:   "/mnt",
		Mode:         "rw",
		InstanceUUID: server.ID,
	}

	t.Logf("Attempting to attach volume %s to server %s", volume.ID, server.ID)

	if err := volumeactions.Attach(client, volume.ID, attachOpts).ExtractErr(); err != nil {
		return err
	}

	if err := volumes.WaitForStatus(client, volume.ID, "in-use", 60); err != nil {
		return err
	}

	t.Logf("Attached volume %s to server %s", volume.ID, server.ID)

	return nil
}

// CreateVolumeReserve creates a volume reservation. An error will be returned
// if the reservation failed.
func CreateVolumeReserve(t *testing.T, client *gophercloud.ServiceClient, volume *volumes.Volume) error {
	if testing.Short() {
		t.Skip("Skipping test that requires volume reservation in short mode.")
	}

	t.Logf("Attempting to reserve volume %s", volume.ID)

	if err := volumeactions.Reserve(client, volume.ID).ExtractErr(); err != nil {
		return err
	}

	t.Logf("Reserved volume %s", volume.ID)

	return nil
}

// DeleteVolumeAttach will detach a volume from an instance. A fatal error will
// occur if the snapshot failed to be deleted. This works best when used as a
// deferred function.
func DeleteVolumeAttach(t *testing.T, client *gophercloud.ServiceClient, volume *volumes.Volume) {
	t.Logf("Attepting to detach volume volume: %s", volume.ID)

	detachOpts := volumeactions.DetachOpts{
		AttachmentID: volume.Attachments[0].AttachmentID,
	}

	if err := volumeactions.Detach(client, volume.ID, detachOpts).ExtractErr(); err != nil {
		t.Fatalf("Unable to detach volume %s: %v", volume.ID, err)
	}

	if err := volumes.WaitForStatus(client, volume.ID, "available", 60); err != nil {
		t.Fatalf("Volume %s failed to become unavailable in 60 seconds: %v", volume.ID, err)
	}

	t.Logf("Detached volume: %s", volume.ID)
}

// DeleteVolumeReserve deletes a volume reservation. A fatal error will occur
// if the deletion request failed. This works best when used as a deferred
// function.
func DeleteVolumeReserve(t *testing.T, client *gophercloud.ServiceClient, volume *volumes.Volume) {
	if testing.Short() {
		t.Skip("Skipping test that requires volume reservation in short mode.")
	}

	t.Logf("Attempting to unreserve volume %s", volume.ID)

	if err := volumeactions.Unreserve(client, volume.ID).ExtractErr(); err != nil {
		t.Fatalf("Unable to unreserve volume %s: %v", volume.ID, err)
	}

	t.Logf("Unreserved volume %s", volume.ID)
}

// ExtendVolumeSize will extend the size of a volume.
func ExtendVolumeSize(t *testing.T, client *gophercloud.ServiceClient, volume *volumes.Volume) error {
	t.Logf("Attempting to extend the size of volume %s", volume.ID)

	extendOpts := volumeactions.ExtendSizeOpts{
		NewSize: 2,
	}

	err := volumeactions.ExtendSize(client, volume.ID, extendOpts).ExtractErr()
	if err != nil {
		return err
	}

	if err := volumes.WaitForStatus(client, volume.ID, "available", 60); err != nil {
		return err
	}

	return nil
}

// SetImageMetadata will apply the metadata to a volume.
func SetImageMetadata(t *testing.T, client *gophercloud.ServiceClient, volume *volumes.Volume) error {
	t.Logf("Attempting to apply image metadata to volume %s", volume.ID)

	imageMetadataOpts := volumeactions.ImageMetadataOpts{
		Metadata: map[string]string{
			"image_name": "testimage",
		},
	}

	err := volumeactions.SetImageMetadata(client, volume.ID, imageMetadataOpts).ExtractErr()
	if err != nil {
		return err
	}

	return nil
}

// CreateBackup will create a backup based on a volume. An error will be
// will be returned if the backup could not be created.
func CreateBackup(t *testing.T, client *gophercloud.ServiceClient, volumeID string) (*backups.Backup, error) {
	t.Logf("Attempting to create a backup of volume %s", volumeID)

	backupName := tools.RandomString("ACPTTEST", 16)
	createOpts := backups.CreateOpts{
		VolumeID: volumeID,
		Name:     backupName,
	}

	backup, err := backups.Create(client, createOpts).Extract()
	if err != nil {
		return nil, err
	}

	err = WaitForBackupStatus(client, backup.ID, "available", 120)
	if err != nil {
		return nil, err
	}

	backup, err = backups.Get(client, backup.ID).Extract()
	if err != nil {
		return nil, err
	}

	t.Logf("Successfully created backup %s", backup.ID)
	tools.PrintResource(t, backup)

	th.AssertEquals(t, backup.Name, backupName)

	return backup, nil
}

// DeleteBackup will delete a backup. A fatal error will occur if the backup
// could not be deleted. This works best when used as a deferred function.
func DeleteBackup(t *testing.T, client *gophercloud.ServiceClient, backupID string) {
	if err := backups.Delete(client, backupID).ExtractErr(); err != nil {
		t.Fatalf("Unable to delete backup %s: %s", backupID, err)
	}

	t.Logf("Deleted backup %s", backupID)
}

// WaitForBackupStatus will continually poll a backup, checking for a particular
// status. It will do this for the amount of seconds defined.
func WaitForBackupStatus(client *gophercloud.ServiceClient, id, status string, secs int) error {
	return gophercloud.WaitFor(secs, func() (bool, error) {
		current, err := backups.Get(client, id).Extract()
		if err != nil {
			return false, err
		}

		if current.Status == status {
			return true, nil
		}

		return false, nil
	})
}
