func (ts *TestStore) GetACI(name types.ACIdentifier, labels types.Labels) (string, error) {
	for _, aci := range ts.acis {
		if aci.ImageManifest.Name.String() == name.String() {
			return aci.key, nil
		}
	}
	return "", fmt.Errorf("aci not found")
}

func (ms *ConversionStore) GetACI(name types.ACIdentifier, labels types.Labels) (string, error) {
	for _, aci := range ms.acis {
		// we implement this function to comply with the interface so don't
		// bother implementing a proper label check
		if aci.ImageManifest.Name.String() == name.String() {
			return aci.key, nil
		}
	}
	return "", fmt.Errorf("aci not found")
}

func imageNameToAppName(name types.ACIdentifier) (*types.ACName, error) {
	parts := strings.Split(name.String(), "/")
	last := parts[len(parts)-1]

	sn, err := types.SanitizeACName(last)
	if err != nil {
		return nil, err
	}

	return types.MustACName(sn), nil
}

// GetACI retrieves the ACI that best matches the provided app name and labels.
// The returned value is the blob store key of the retrieved ACI.
// If there are multiple matching ACIs choose the latest one (defined as the
// last one imported in the store).
// If no version label is requested, ACIs marked as latest in the ACIInfo are
// preferred.
func (s Store) GetACI(name types.ACIdentifier, labels types.Labels) (string, error) {
	var curaciinfo *ACIInfo
	versionRequested := false
	if _, ok := labels.Get("version"); ok {
		versionRequested = true
	}

	var aciinfos []*ACIInfo
	err := s.db.Do(func(tx *sql.Tx) error {
		var err error
		aciinfos, _, err = GetACIInfosWithAppName(tx, name.String())
		return err
	})
	if err != nil {
		return "", err
	}

nextKey:
	for _, aciinfo := range aciinfos {
		im, err := s.GetImageManifest(aciinfo.BlobKey)
		if err != nil {
			return "", fmt.Errorf("error getting image manifest: %v", err)
		}

		// The image manifest must have all the requested labels
		for _, l := range labels {
			ok := false
			for _, rl := range im.Labels {
				if l.Name == rl.Name && l.Value == rl.Value {
					ok = true
					break
				}
			}
			if !ok {
				continue nextKey
			}
		}

		if curaciinfo != nil {
			// If no version is requested prefer the acis marked as latest
			if !versionRequested {
				if !curaciinfo.Latest && aciinfo.Latest {
					curaciinfo = aciinfo
					continue nextKey
				}
				if curaciinfo.Latest && !aciinfo.Latest {
					continue nextKey
				}
			}
			// If multiple matching image manifests are found, choose the latest imported in the cas.
			if aciinfo.ImportTime.After(curaciinfo.ImportTime) {
				curaciinfo = aciinfo
			}
		} else {
			curaciinfo = aciinfo
		}
	}

	if curaciinfo != nil {
		return curaciinfo.BlobKey, nil
	}
	return "", fmt.Errorf("cannot find aci satisfying name: %q and labels: %s in the local store", name, labelsToString(labels))
}