#
# This file is part of Freedom Maker.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
"""
Base worker class to build Virtual Machine images.
"""

import os

from .amd_intel import AMDIntelImageBuilder


class VMImageBuilder(AMDIntelImageBuilder):
    """Base image builder for all virtual machine targets."""
    vm_image_extension = None

    def build(self):
        """Run the image building process."""
        vm_file = self._replace_extension(self.image_file,
                                          self.vm_image_extension)
        vm_archive_file = vm_file + '.xz'

        self.make_image()
        self.create_vm_file(self.image_file, vm_file)
        os.remove(self.image_file)
        self.compress(vm_archive_file, vm_file)

        self.sign(vm_archive_file)

    def create_vm_file(self, image_file, vm_file):
        """Create a VM image from image file."""
        raise Exception('Not reached')
