# Copyright 2009-2014 Eucalyptus Systems, Inc.
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from euca2ools.commands.ec2 import EC2Request
from requestbuilder import Arg
from requestbuilder.exceptions import ArgumentError


class DisassociateAddress(EC2Request):
    DESCRIPTION = 'Disassociate an elastic IP address from an instance'
    ARGS = [Arg('PublicIp', metavar='ADDRESS', nargs='?', help='''[Non-VPC
                only] elastic IP address to disassociate (required)'''),
            Arg('-a', '--association-id', dest='AssociationId',
                metavar='ASSOC',
                help="[VPC only] address's association ID (required)")]

    # noinspection PyExceptionInherit
    def configure(self):
        EC2Request.configure(self)
        if self.args.get('PublicIp'):
            if self.args.get('AssociationId'):
                raise ArgumentError('argument -a/--association-id: not '
                                    'allowed with an IP address')
            elif self.args['PublicIp'].startswith('eipassoc'):
                raise ArgumentError('VPC elastic IP association IDs must be '
                                    'be specified with -a/--association-id')
        elif not self.args.get('AssociationId'):
            raise ArgumentError(
                'argument -a/--association-id or an IP address is required')

    def print_result(self, _):
        target = self.args.get('PublicIp') or self.args.get('AssociationId')
        print self.tabify(('ADDRESS', target))
