# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2012 OpenStack LLC.
# All Rights Reserved.
#
#    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 limitations
#    under the License.

import json
import os
import shutil

import stubout

from glance.openstack.common import cfg
from glance import store
from glance.store import filesystem
from glance.store import location
from glance.tests import stubs
from glance.tests import utils as test_utils

CONF = cfg.CONF


class StoreClearingUnitTest(test_utils.BaseTestCase):

    def setUp(self):
        super(StoreClearingUnitTest, self).setUp()
        # Ensure stores + locations cleared
        store.STORES = {}
        location.SCHEME_TO_CLS_MAP = {}
        store.create_stores()

    def tearDown(self):
        super(StoreClearingUnitTest, self).tearDown()
        # Ensure stores + locations cleared
        store.STORES = {}
        location.SCHEME_TO_CLS_MAP = {}


class IsolatedUnitTest(StoreClearingUnitTest):

    """
    Unit test case that establishes a mock environment within
    a testing directory (in isolation)
    """

    def setUp(self):
        self.test_id, self.test_dir = test_utils.get_isolated_test_env()
        self.stubs = stubout.StubOutForTesting()
        policy_file = self._copy_data_file('policy.json', self.test_dir)
        self.config(sql_connection='sqlite://',
                    verbose=False,
                    debug=False,
                    default_store='filesystem',
                    filesystem_store_datadir=os.path.join(self.test_dir),
                    policy_file=policy_file)
        super(IsolatedUnitTest, self).setUp()
        stubs.stub_out_registry_and_store_server(self.stubs, self.test_dir)

    def _copy_data_file(self, file_name, dst_dir):
        src_file_name = os.path.join('glance/tests/etc', file_name)
        shutil.copy(src_file_name, dst_dir)
        dst_file_name = os.path.join(dst_dir, file_name)
        return dst_file_name

    def set_policy_rules(self, rules):
        fap = open(CONF.policy_file, 'w')
        fap.write(json.dumps(rules))
        fap.close()

    def tearDown(self):
        super(IsolatedUnitTest, self).tearDown()
        self.stubs.UnsetAll()
        if os.path.exists(self.test_dir):
            shutil.rmtree(self.test_dir)
