# Copyright 2009-2013 Eucalyptus Systems, Inc.
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from euca2ools.commands.ec2 import EC2Request
from requestbuilder import Arg, Filter


class DescribeAvailabilityZones(EC2Request):
    DESCRIPTION = 'Display availability zones within the current region'
    ARGS = [Arg('ZoneName', metavar='ZONE', nargs='*',
                help='limit results to specific availability zones')]
    FILTERS = [Filter('message', help='''message giving information about the
                      availability zone'''),
               Filter('region-name',
                      help='region the availability zone is in'),
               Filter('state', help='state of the availability zone'),
               Filter('zone-name', help='name of the availability zone')]
    LIST_TAGS = ['availabilityZoneInfo', 'messageSet']

    def print_result(self, result):
        for zone in result.get('availabilityZoneInfo', []):
            msgs = ', '.join(msg for msg in zone.get('messageSet', []))
            print self.tabify(('AVAILABILITYZONE', zone.get('zoneName'),
                               zone.get('zoneState'), msgs))