#!/usr/bin/python

# Copyright (c) 2009, Purdue University
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"""Remove view tool for Roster"""


__copyright__ = 'Copyright (C) 2009, Purdue University'
__license__ = 'BSD'
__version__ = '0.5'


import os
import sys
import getpass

from optparse import OptionParser

from roster_user_tools import cli_common_lib
from roster_user_tools import roster_client_lib


def main(args):
  """Collects command line arguments.

  Inputs:
    args: list of arguments from the command line
  """
  parser = OptionParser()

  parser.add_option('-e', '--dns-server-set', action='store',
                    dest='dns_server_set', help='Dns server set.',
                    default=None)
  parser.add_option('-v', '--view', action='store', dest='view',
                    help='Modify a view.', default=None)
  parser.add_option('--acl', action='store', dest='acl',
                    help='Modify an access control list. (name)', default=None)
  parser.add_option('--cidr-block', action='store', dest='cidr_block',
                    help='Cidr block or single IP address. Used for making'
                         ' ACLs.', default=None)
  parser.add_option('--allow', action='store_true', dest='allow',
                    help='Allow access for specified ACL.', default=None)
  parser.add_option('--deny', action='store_false', dest='deny',
                    help='Deny access for specified ACL.', default=None)
  parser.add_option('-s', '--server', action='store', dest='server',
                    help='XML RPC Server URL.', metavar='<server>',
                    default='https://localhost:8000')
  parser.add_option('-u', '--username', action='store', dest='username',
                    help='Run as a different username.', metavar='<username>',
                    default=unicode(getpass.getuser()))
  parser.add_option('-p', '--password', action='store', dest='password',
                    help='Password string, NOTE: It is insecure to use this '
                         'flag on the command line.', metavar='<password>',
                    default=None)
  parser.add_option('-c', '--cred-file', action='store', dest='credfile',
                    help='Location of credential file.', metavar='<cred-file>',
                    default=os.path.join(os.path.expanduser('~'), '.dnscred'))
  parser.add_option('-l', '--list', action='store_true', dest='list',
                    help='List only and make no changes.', default=False)
  parser.add_option('--cred-string', action='store', dest='credstring',
                    help='String of credential.', metavar='<cred-string>',
                    default=None)
  parser.add_option('-q', '--quiet', action='store_true', dest='quiet',
                    help='Suppress program output.', default=False)


  (globals()["options"], args) = parser.parse_args(args)

  cli_common_lib.CheckCredentials(options)

  if( options.dns_server_set ):
    cli_common_lib.DisallowFlags([u'cidr_block', u'acl'], parser, options)
    if( not options.view ):
      cli_common_lib.DnsError('To remove a dns server set view assignment a '
                              'view must be specified with the -v flag.', 1)
    roster_client_lib.RunFunction(u'RemoveDnsServerSetViewAssignments',
                                  options.username,
                                  credfile=options.credfile,
                                  credstring=options.credstring,
                                  server_name=options.server,
                                  args=[options.view, options.dns_server_set])
    if( not options.quiet ):
      print ('REMOVED DNS SERVER SET VIEW ASSIGNMENT: view_name %s '
             'dns_server_set: %s' % (options.view, options.dns_server_set))
  elif( options.view ):
    cli_common_lib.DisallowFlags([u'cidr_block', u'acl'], parser, options)
    roster_client_lib.RunFunction(u'RemoveView', options.username,
                                  credfile=options.credfile,
                                  credstring=options.credstring,
                                  server_name=options.server,
                                  args=[options.view])
    if( not options.quiet ):
      print 'REMOVED VIEW: %s' % options.view
  elif( options.acl ):
    if( options.cidr_block is None ):
      cli_common_lib.DnsError('To remove an ACL a CIDR block or ip address '
                              'must be specified with the --cidr-block flag.',
                              1)
    if( options.allow is not None and options.deny is not None ):
      cli_common_lib.DnsError('--allow and --deny cannot be used '
                              'simultaneously.', 1)
    allowed=0
    if( options.allow ):
      allowed=1
    roster_client_lib.RunFunction(u'RemoveACL', options.username,
                                  credfile=options.credfile,
                                  credstring=options.credstring,
                                  server_name=options.server,
                                  kwargs={'acl_name': options.acl,
                                          'cidr_block': options.cidr_block,
                                          'range_allowed': allowed})
    if( not options.quiet ):
      print 'REMOVED ACL: acl_name: %s cidr_block: %s range_allowed: %s' % (
          options.acl, options.cidr_block, options.allow)
  else:
    parser.print_help()
    cli_common_lib.DnsError('Must specify a flag.', 1)

if __name__ == "__main__":
  main(sys.argv[1:])
