#!/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.
#
# 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
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# Author: Neil Soman neil@eucalyptus.com

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

usage_string = \
    """
Creates a snapshot from an existing volume.

euca-create-snapshot [-h, --help] [--version] [--debug] volume_id 

REQUIRED PARAMETERS
	
volume_id			unique id for a volume to snapshot.

OPTIONAL PARAMETERS

"""


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


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


def display_snapshot(snapshot):
    if not snapshot.id:
        return
    snapshot_string = '%s\t%s\t%s\t%s\t%s' % (snapshot.id,
            snapshot.volume_id, snapshot.status, snapshot.start_time,
            snapshot.progress)
    print 'SNAPSHOT\t%s' % snapshot_string


def main():
    euca = None
    try:
        euca = Euca2ool()
    except Exception, e:
        print e
        usage()

    volume_id = None

    for (name, value) in euca.opts:
        if name in ('-h', '--help'):
            usage(0)
        elif name == '--version':
            version()

    try:
        euca_conn = euca.make_connection()
    except ConnectionFailed, e:
        print e.message
        sys.exit(1)

    for arg in euca.args:
        volume_id = arg
        break

    if volume_id:
        try:
            euca.validate_volume_id(volume_id)
        except VolumeValidationError:
            print 'Invalid volume id'
            sys.exit(1)

        try:
            snapshot = euca_conn.create_snapshot(volume_id)
        except Exception, ex:
            euca.display_error_and_exit('%s' % ex)

        if snapshot:
            display_snapshot(snapshot)
    else:
        print 'volume_id must be specified'
        usage()


if __name__ == '__main__':
    main()

