#!/usr/bin/env python

# 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:
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#   Redistributions of source code must retain the above
#   copyright notice, this list of conditions and the
#   following disclaimer.
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#   Redistributions in binary form must reproduce the above
#   copyright notice, this list of conditions and the
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#   materials provided with the distribution.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# 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
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# Author: Neil Soman neil@eucalyptus.com

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

usage_string = """
Shows information about machine images.

euca-describe-images [-a] [-o owner] [-x user] [-h, --help] [--version] [--debug] [image1 image2 ... imageN]

OPTIONAL PARAMETERS

image1 image2 ... imageN	Images to describe.

-a 				Show all images that the user has access to.

-o 				Show only images owned by the owner specified are displayed.	

-x 				Show only images that the specified user is permitted to launch.

"""


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

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

def display_images(images):
    for image in images:
	image_string = '%s\t%s\t%s\t%s' % (image.id, image.location, image.ownerId, image.state)
	if image.is_public:
  	    image_string += '\tpublic'
	else:
	    image_string += '\tprivate'

	image_string += '\t%s' % ','.join(image.product_codes)

	for i in [image.architecture, image.type,
	          image.kernel_id, image.ramdisk_id]:
	    image_string += '\t%s' % ("" if i == None else i)

	print 'IMAGE\t%s' % (image_string)

def main():
    euca = None
    try:
        euca = Euca2ool('ao:x:', compat=True) 
    except Exception, e:
        print e
        usage()
 
    all_ids = False
    owners = [ ]
    executable_by = [ ]
    image_ids = [ ]

    for name, value in euca.opts:
        if name in ('-h', '--help'):
            usage(0)
        elif name == '-x':
            executable_by.append(value)
        elif name == '-o':
            owners.append(value)
        elif name == '-a':
            all_ids = True
        elif name == '--version':
            version()
            sys.exit(0)

    image_ids = euca.process_args()

    if all_ids and ( len(owners) or len(executable_by) or len(image_ids) ):
        euca.display_error_and_exit("-a cannot be combined with owner, launch, or image list")

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

    if len(owners) == 0 and len(executable_by) == 0 and \
       len(image_ids) == 0 and not all_ids:
        try:
           owned = euca_conn.get_all_images(image_ids = None,
               owners = ("self", ), executable_by = None )
           launchable = euca_conn.get_all_images(image_ids = None,
               owners = None, executable_by = ("self"))

           mylist = [ ]
           images = [ ]
           for image in owned:
               mylist.append(image.id)
               images.append(image)
           for image in launchable:
               if image.id not in mylist:
                   images.append(image)
        except Exception, ex:
            euca.display_error_and_exit('%s' % ex)
    else:
        try:
            images = euca_conn.get_all_images(image_ids=image_ids, owners=owners, executable_by=executable_by)
        except Exception, ex:
            euca.display_error_and_exit('%s' % ex)

    display_images(images)

if __name__ == "__main__":
    main()
 
