# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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
# limitations under the License.

from shutil import rmtree
from tempfile import mkdtemp

from sqlalchemy import (
    create_engine,
    orm,
    pool,
    MetaData
)

from aria.modeling import models


class TestFileSystem(object):

    def setup_method(self):
        self.path = mkdtemp('{0}'.format(self.__class__.__name__))

    def teardown_method(self):
        rmtree(self.path, ignore_errors=True)


def release_sqlite_storage(storage):
    """
    Drops the tables and clears the session
    :param storage:
    :return:
    """
    storage._all_api_kwargs['session'].close()
    MetaData(bind=storage._all_api_kwargs['engine']).drop_all()


def init_inmemory_model_storage():
    uri = 'sqlite:///:memory:'
    engine_kwargs = dict(connect_args={'check_same_thread': False}, poolclass=pool.StaticPool)

    engine = create_engine(uri, **engine_kwargs)
    session_factory = orm.sessionmaker(bind=engine)

    return dict(engine=engine, session=session_factory())