# -*- cpy-indent-level: 4; indent-tabs-mode: nil -*-
# ex: set expandtab softtabstop=4 shiftwidth=4:
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# Copyright (C) 2008,2009,2010,2011,2013,2014,2015,2016  Contributor
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#     http://www.apache.org/licenses/LICENSE-2.0
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"""Contains the logic for `aq del personality`."""

from sqlalchemy.inspection import inspect

from aquilon.exceptions_ import ArgumentError
from aquilon.aqdb.model import (Personality, PersonalityStage, CompileableMixin,
                                Cluster)
from aquilon.worker.broker import BrokerCommand


class CommandDelPersonality(BrokerCommand):
    requires_plenaries = True

    required_parameters = ["personality", "archetype"]

    def render(self, session, plenaries, personality, archetype, **_):
        dbpersona = Personality.get_unique(session, name=personality,
                                           archetype=archetype, compel=True)

        for cls_ in CompileableMixin.__subclasses__():
            q = session.query(*inspect(cls_).mapper.primary_key)
            q = q.join(PersonalityStage)
            q = q.filter_by(personality=dbpersona)
            if q.count():
                raise ArgumentError("{0} is still in use and cannot be deleted."
                                    .format(dbpersona))

        plenaries.add(dbpersona.stages.values())

        q = session.query(Cluster)
        q = q.filter(Cluster.allowed_personalities.contains(dbpersona))
        for dbobj in q:
            plenaries.add(dbobj)

        session.delete(dbpersona)

        session.flush()

        plenaries.write()

        return
