# -*- cpy-indent-level: 4; indent-tabs-mode: nil -*-
# ex: set expandtab softtabstop=4 shiftwidth=4:
#
# Copyright (C) 2008,2009,2010,2011,2012,2013,2014  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,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
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""" DnsRecords are higher level constructs which can provide services """

from sqlalchemy import Column, ForeignKey

from aquilon.exceptions_ import ArgumentError
from aquilon.aqdb.model import DnsRecord

_TN = "reserved_name"


class ReservedName(DnsRecord):
    """
        ReservedName is a placeholder for a name that does not have an IP
        address.
    """

    __tablename__ = _TN
    __mapper_args__ = {'polymorphic_identity': _TN}
    _class_label = 'Reserved Name'

    dns_record_id = Column(ForeignKey(DnsRecord.id, ondelete='CASCADE'),
                           primary_key=True)

    __table_args__ = ({'info': {'unique_fields': ['fqdn'],
                                'extra_search_fields': ['dns_environment']}},)

    def __init__(self, **kwargs):
        if "ip" in kwargs and kwargs["ip"]:  # pragma: no cover
            raise ArgumentError("Reserved names must not have an IP address.")
        super(ReservedName, self).__init__(**kwargs)
