#!/usr/bin/python
# -*- coding: utf-8 -*-

# Software License Agreement (BSD License)
#
# Copyright (c) 2009, Eucalyptus Systems, Inc.
# All rights reserved.
#
# Redistribution and use of this software in source and binary forms, with or
# without modification, are permitted provided that the following conditions
# are met:
#
#   Redistributions of source code must retain the above
#   copyright notice, this list of conditions and the
#   following disclaimer.
#
#   Redistributions in binary form must reproduce the above
#   copyright notice, this list of conditions and the
#   following disclaimer in the documentation and/or other
#   materials provided with the distribution.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
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# Author: Neil Soman neil@eucalyptus.com

import getopt
import sys
import os
from euca2ools import Euca2ool, Util, ConnectionFailed

usage_string = \
    """
Shows information about availability zones.

euca-describe-availability-zones [--region region] [-h, --help] [--version] [--debug] [zone1 zone2...zoneN] [verbose]

OPTIONAL PARAMETERS

--region			region to describe availability zones for

zone1 zone2...zoneN		zones to describe. 

verbose				show verbose resource information (Eucalyptus administrator-only functionality).			
"""


def usage(status=1):
    print usage_string
    Util().usage()
    sys.exit(status)


def version():
    print Util().version()
    sys.exit()


def display_zones(zones, zone_ids, region):
    for zone in zones:
        zone_string = '%s\t%s' % (zone.name, zone.state)
        if region:
            zone_string += '\t%s' % region
        print 'AVAILABILITYZONE\t%s' % zone_string


def main():
    euca = None
    region = None
    try:
        euca = Euca2ool('', ['region='])
    except Exception, e:
        print e
        usage()
    for (name, value) in euca.opts:
        if name == '--region':
            region = value
        elif name in ('-h', '--help'):
            usage(0)
        elif name == '--version':
            version()

    debug = False

    if region:
        os.environ['EC2_URL'] = 'https://' + region \
            + '.ec2.amazonaws.com'
    zone_ids = euca.process_args()
    try:
        euca_conn = euca.make_connection()
    except ConnectionFailed, e:
        print e.message
        sys.exit(1)

    try:
        zones = euca_conn.get_all_zones(zone_ids)
    except Exception, ex:
        euca.display_error_and_exit('%s' % ex)

    display_zones(zones, zone_ids, region)


if __name__ == '__main__':
    main()

