# Copyright (c) 2014-2016 Hewlett Packard Enterprise Development LP
#
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import os.path

from requestbuilder import Arg
from requestbuilder.command import BaseCommand
from requestbuilder.mixins import FileTransferProgressBarMixin

import euca2ools.commands
from euca2ools.commands.euimage.pack import ImagePack


class PackImage(BaseCommand, FileTransferProgressBarMixin):
    SUITE = euca2ools.commands.Euca2ools
    DESCRIPTION = ('***TECH PREVIEW***\n\nPack an image for simple '
                   'installation in a cloud')
    ARGS = [Arg('image_filename', metavar='IMAGE_FILE',
                help='the image to pack (required)'),
            Arg('md_filename', metavar='MD_FILE',
                help='metadata for the image to pack (required)')]

    def main(self):
        pbar = self.get_progressbar(
            label='Compressing',
            maxval=os.path.getsize(self.args['image_filename']))
        pack = ImagePack.build(self.args['md_filename'],
                               self.args['image_filename'], progressbar=pbar)
        return pack.filename

    # pylint: disable=no-self-use
    def print_result(self, pack_filename):
        print 'Wrote', pack_filename
    # pylint: enable=no-self-use