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from django.core.management.base import NoArgsCommand, CommandError
from optparse import make_option
from synnefo import settings
from os import path


class Command(NoArgsCommand):
    help = "Export account quota policies"
    option_list = NoArgsCommand.option_list + (
        make_option('--location',
                dest='location',
                default='exported_quota',
                help="Where to save the output file"),
    )

    def handle_noargs(self, **options):
        try:
            vms_per_user = settings.VMS_USER_QUOTA
            nets_per_user = settings.NETWORKS_USER_QUOTA
        except AttributeError as e:
            raise CommandError(e)
        location = path.abspath(options['location'])

        try:
            f = open(location, 'w')
        except IOError as e:
            raise CommandError(e)

        for user, value in vms_per_user.items():
            f.write(' '.join([user, "cyclades.vm", "%s" % value, '0', '0',
                              '0']))
            f.write('\n')
        for user, value in nets_per_user.items():
            f.write(' '.join([user, "cyclades.network.private", "%s" % value,
                            '0', '0', '0']))
            f.write('\n')

        f.close()

        self.stdout.write("Successfully exported cyclades per-user-quotas to"
                          " file '%s'\n" % location)