# -*- cpy-indent-level: 4; indent-tabs-mode: nil -*-
# ex: set expandtab softtabstop=4 shiftwidth=4:
#
# Copyright (C) 2008,2009,2010,2011,2012,2013,2016  Contributor
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
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"""Contains the logic for `aq show location --type`."""

from sqlalchemy.orm.exc import NoResultFound
from sqlalchemy.orm import subqueryload

from aquilon.exceptions_ import NotFoundException
from aquilon.aqdb.model import Location
from aquilon.worker.broker import BrokerCommand


class CommandShowLocationType(BrokerCommand):

    required_parameters = ["type"]

    def render(self, session, type, name, **_):
        cls = Location.polymorphic_subclass(type, "Unknown location type")
        query = session.query(cls)
        query = query.options(subqueryload('parents'),
                              subqueryload('default_dns_domain'))

        if name:
            query = query.filter_by(name=name)
            try:
                return query.one()
            except NoResultFound:
                raise NotFoundException("%s %s not found." %
                                        (cls._get_class_label(), name))

        return query.order_by(Location.location_type, Location.name).all()
