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from gremlin_python.process.anonymous_traversal import traversal
from gremlin_python.process.graph_traversal import __
from radish import pick

@pick
def create_lookup_v(remote):
    g = traversal().withRemote(remote)

    # hold a map of name/vertex for use in asserting results
    return g.V().group().by('name').by(__.tail()).next()


@pick
def create_lookup_e(remote):
    g = traversal().withRemote(remote)

    # hold a map of the "name"/edge for use in asserting results - "name" in this context is in the form of
    # outgoingV-label->incomingV
    return g.E().group(). \
        by(lambda: ("it.outVertex().value('name') + '-' + it.label() + '->' + it.inVertex().value('name')", "gremlin-groovy")). \
        by(__.tail()).next()