# Copyright 2013 Eucalyptus Systems, Inc.
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from euca2ools.commands.autoscaling.argtypes import autoscaling_tag_def
from requestbuilder import Arg


class TagArg(Arg):
    def __init__(self, required=False):
        helpstr = '''attributes of a tag to affect.  Tags follow the following
        format: "id=resource-name, t=resource-type, k=tag-key, v=tag-val,
        p=propagate-at-launch-flag", where k is the tag's name, v is the tag's
        value, id is a resource ID, t is a resource type, and p is whether to
        propagate tags to instances created by the group.  A value for 'k=' is
        required for each tag.  The rest are optional.  This argument may be
        used more than once.  Each time affects a different tag.'''

        if required:
            helpstr += '  (at least 1 required)'

        Arg.__init__(self, '--tag', dest='Tags.member', required=required,
                     action='append', type=autoscaling_tag_def, help=helpstr,
                     metavar=('"k=VALUE, id=VALUE, t=VALUE, v=VALUE, '
                              'p={true,false}"'))