#!/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:
#
#   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

usage_string = """
Show image attributes.

euca-describe-image-attribute [-l, --launch-permission] [-p, --product-code] 
[-B, --block-device-mapping] [--kernel] [--ramdisk]
[-h, --help] [--version] [--debug] image_id 

REQUIRED PARAMETERS
	
image_id			unique identifier for the image that you want to retrieve the attributes for. 

OPTIONAL PARAMETERS

-B, --block-device-mapping	show block device mapping.
-l, --launch-permission 	show launch permissions.
-p, --product-code		show the product codes associated with the image
--kernel 			show the kernel id associated with the image.
--ramdisk 			show the ramdisk id associated with the image.

"""

version_string = """    euca-describe-image-attribute version: 1.0 (BSD)"""

def usage():
    print usage_string
    Util().usage()

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

 
def display_image_attribute(image_id, image_attribute):
    if image_attribute.name == 'launch_permission':
        if image_attribute.attrs.has_key('groups'):
	    for group in image_attribute.attrs['groups']:
		print 'launchPermission\t%s\tgroup\t%s' % (image_attribute.image_id, group)
	if image_attribute.attrs.has_key('user_ids'):
	    for userid in image_attribute.attrs['user_ids']:
		print 'launchPermission\t%s\tuserId\t%s' % (image_attribute.image_id, userid)
    if image_attribute.attrs.has_key('product_codes'):
	for product_code in image_attribute.attrs['product_codes']:
	    print 'productCodes\t%s\tproductCode\t%s' % (image_attribute.image_id, product_code)
    if image_attribute.kernel is not None:
	print 'kernel\t%s\t\t%s' % (image_attribute.image_id, image_attribute.value)
    if image_attribute.ramdisk is not None:
	print 'ramdisk\t%s\t\t%s' % (image_attribute.image_id, image_attribute.value)
    if image_attribute.name == 'block_device_mapping':
        for i in range(0, len(image_attribute.attrs['virtual_names'])):
            print 'blockDeviceMapping\t%s\tblockDeviceMap\t%s: %s' % (image_id, image_attribute.attrs['virtual_names'][i], image_attribute.attrs['device_names'][i])

def main():
    euca = None
    try:
        euca = Euca2ool('lpB',
                                   ['block-device-mapping', 'launch-permission', 'product-code',
				    'kernel', 'ramdisk'])
    except Exception, e:
	print e
        usage()
 
    image_id = None
    image_attribute = None

    for name, value in euca.opts:
	if name in ('-p', '--product-code'):
	    if not image_attribute:
	        image_attribute = 'productCodes'
	elif name in ('-l', '--launch-permission'):
	    if not image_attribute:
		image_attribute = 'launchPermission'
	elif name in ('-B', '--block-device-mapping'):
	    if not image_attribute:
		image_attribute = 'blockDeviceMapping'
	elif name == '--kernel':
	    if not image_attribute:
		image_attribute = 'kernel'
	elif name == '--ramdisk':
	    if not image_attribute:
		image_attribute = 'ramdisk'
        elif name in ('-h', '--help'):
            usage()
	elif name == '--version':
	    version()
    
    for arg in euca.args:
        image_id = arg
	break

    if image_id and image_attribute:
        euca_conn = euca.make_connection()
	try:
	    image_attribute = euca_conn.get_image_attribute(image_id = image_id,
						     attribute = image_attribute)
        except Exception, ex:
            euca.display_error_and_exit('%s' % ex)

	if image_attribute:
	    display_image_attribute(image_id, image_attribute)
    else:
 	if not image_id:
    	    print 'image_id must be specified'
	if not image_attribute:
	    print 'image attribute must be specified'
	usage()
if __name__ == "__main__":
    main()
 
