# Copyright (c) 2013 OpenStack Foundation.
# 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 mock
from neutron.api.v2 import attributes
from neutron import context
from neutron.extensions import agent
from neutron.tests.unit.db import test_db_base_plugin_v2 as test_db_plugin
from oslo_config import cfg
import six

from vmware_nsx.api_client import version
from vmware_nsx.common import sync
from vmware_nsx.tests import unit as vmware
from vmware_nsx.tests.unit.nsx_mh.apiclient import fake
from vmware_nsx.tests.unit import test_utils


class MacLearningExtensionManager(object):

    def get_resources(self):
        # Add the resources to the global attribute map
        # This is done here as the setup process won't
        # initialize the main API router which extends
        # the global attribute map
        attributes.RESOURCE_ATTRIBUTE_MAP.update(
            agent.RESOURCE_ATTRIBUTE_MAP)
        return agent.Agent.get_resources()

    def get_actions(self):
        return []

    def get_request_extensions(self):
        return []


class MacLearningDBTestCase(test_db_plugin.NeutronDbPluginV2TestCase):
    fmt = 'json'

    def setUp(self):
        test_utils.override_nsx_ini_full_test()
        cfg.CONF.set_override('api_extensions_path', vmware.NSXEXT_PATH)
        # Save the original RESOURCE_ATTRIBUTE_MAP
        self.saved_attr_map = {}
        for resource, attrs in six.iteritems(
                attributes.RESOURCE_ATTRIBUTE_MAP):
            self.saved_attr_map[resource] = attrs.copy()
        ext_mgr = MacLearningExtensionManager()
        # mock api client
        self.fc = fake.FakeClient(vmware.STUBS_PATH)
        self.mock_nsx = mock.patch(vmware.NSXAPI_NAME, autospec=True)
        instance = self.mock_nsx.start()
        # Avoid runs of the synchronizer looping call
        patch_sync = mock.patch.object(sync, '_start_loopingcall')
        patch_sync.start()

        # Emulate tests against NSX 2.x
        instance.return_value.get_version.return_value = version.Version("3.0")
        instance.return_value.request.side_effect = self.fc.fake_request
        cfg.CONF.set_override('metadata_mode', None, 'NSX')
        self.addCleanup(self.fc.reset_all)
        self.addCleanup(self.restore_resource_attribute_map)
        super(MacLearningDBTestCase, self).setUp(plugin=vmware.PLUGIN_NAME,
                                                 ext_mgr=ext_mgr)
        self.adminContext = context.get_admin_context()

    def restore_resource_attribute_map(self):
        # Restore the original RESOURCE_ATTRIBUTE_MAP
        attributes.RESOURCE_ATTRIBUTE_MAP = self.saved_attr_map

    def test_create_with_mac_learning(self):
        with self.port(arg_list=('mac_learning_enabled',),
                       mac_learning_enabled=True) as port:
            # Validate create operation response
            self.assertEqual(True, port['port']['mac_learning_enabled'])
            # Verify that db operation successfully set mac learning state
            req = self.new_show_request('ports', port['port']['id'], self.fmt)
            sport = self.deserialize(self.fmt, req.get_response(self.api))
            self.assertEqual(True, sport['port']['mac_learning_enabled'])

    def test_create_and_show_port_without_mac_learning(self):
        with self.port() as port:
            req = self.new_show_request('ports', port['port']['id'], self.fmt)
            sport = self.deserialize(self.fmt, req.get_response(self.api))
            self.assertNotIn('mac_learning_enabled', sport['port'])

    def test_update_port_with_mac_learning(self):
        with self.port(arg_list=('mac_learning_enabled',),
                       mac_learning_enabled=False) as port:
            data = {'port': {'mac_learning_enabled': True}}
            req = self.new_update_request('ports', data, port['port']['id'])
            res = self.deserialize(self.fmt, req.get_response(self.api))
            self.assertEqual(True, res['port']['mac_learning_enabled'])

    def test_update_preexisting_port_with_mac_learning(self):
        with self.port() as port:
            req = self.new_show_request('ports', port['port']['id'], self.fmt)
            sport = self.deserialize(self.fmt, req.get_response(self.api))
            self.assertNotIn('mac_learning_enabled', sport['port'])
            data = {'port': {'mac_learning_enabled': True}}
            req = self.new_update_request('ports', data, port['port']['id'])
            # Validate update operation response
            res = self.deserialize(self.fmt, req.get_response(self.api))
            self.assertEqual(True, res['port']['mac_learning_enabled'])
            # Verify that db operation successfully updated mac learning state
            req = self.new_show_request('ports', port['port']['id'], self.fmt)
            sport = self.deserialize(self.fmt, req.get_response(self.api))
            self.assertEqual(True, sport['port']['mac_learning_enabled'])

    def test_list_ports(self):
        # for this test we need to enable overlapping ips
        cfg.CONF.set_default('allow_overlapping_ips', True)
        no_mac_learning_p = (lambda:
                             self.port(arg_list=('mac_learning_enabled',),
                                       mac_learning_enabled=True))

        with no_mac_learning_p(), no_mac_learning_p(), no_mac_learning_p():
            for port in self._list('ports')['ports']:
                self.assertEqual(True, port['mac_learning_enabled'])

    def test_show_port(self):
        with self.port(arg_list=('mac_learning_enabled',),
                       mac_learning_enabled=True) as p:
            port_res = self._show('ports', p['port']['id'])['port']
            self.assertEqual(True, port_res['mac_learning_enabled'])