# Copyright 2014 Intel Corporation.
# Copyright 2014 Isaku Yamahata <isaku.yamahata at intel com>
#                               <isaku.yamahata at gmail com>
# 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 uuid

import mock
from oslo.config import cfg
from webob import exc
import webtest

from neutron.api import extensions
from neutron.api.v2 import attributes
from neutron import quota
from neutron.tests.unit import test_api_v2
from neutron.tests.unit import test_extensions
from neutron.tests.unit import testlib_api
from neutron.tests.unit import testlib_plugin


class ExtensionTestCase(testlib_api.WebTestCase,
                        testlib_plugin.PluginSetupHelper):
    def _resotre_attr_map(self):
        attributes.RESOURCE_ATTRIBUTE_MAP = self._saved_attr_map

    def _setUpExtension(self, plugin, service_type,
                        resource_attribute_map, extension_class,
                        resource_prefix, plural_mappings=None,
                        translate_resource_name=False,
                        allow_pagination=False, allow_sorting=False,
                        supported_extension_aliases=None,
                        use_quota=False,
                        ):

        self._resource_prefix = resource_prefix
        self._plural_mappings = plural_mappings or {}
        self._translate_resource_name = translate_resource_name

        # Ensure existing ExtensionManager is not used
        extensions.PluginAwareExtensionManager._instance = None

        # Save the global RESOURCE_ATTRIBUTE_MAP
        self._saved_attr_map = attributes.RESOURCE_ATTRIBUTE_MAP.copy()
        # Restore the global RESOURCE_ATTRIBUTE_MAP
        self.addCleanup(self._resotre_attr_map)

        # Create the default configurations
        self.config_parse()

        #just stubbing core plugin with plugin
        self.setup_coreplugin(plugin)
        cfg.CONF.set_override('core_plugin', plugin)
        if service_type:
            cfg.CONF.set_override('service_plugins', [plugin])

        self._plugin_patcher = mock.patch(plugin, autospec=True)
        self.plugin = self._plugin_patcher.start()
        instance = self.plugin.return_value
        if service_type:
            instance.get_plugin_type.return_value = service_type
        if supported_extension_aliases is not None:
            instance.supported_extension_aliases = supported_extension_aliases
        if allow_pagination:
            cfg.CONF.set_override('allow_pagination', True)
            # instance.__native_pagination_support = True
            native_pagination_attr_name = ("_%s__native_pagination_support"
                                           % instance.__class__.__name__)
            setattr(instance, native_pagination_attr_name, True)
        if allow_sorting:
            cfg.CONF.set_override('allow_sorting', True)
            # instance.__native_sorting_support = True
            native_sorting_attr_name = ("_%s__native_sorting_support"
                                        % instance.__class__.__name__)
            setattr(instance, native_sorting_attr_name, True)
        if use_quota:
            quota.QUOTAS._driver = None
            cfg.CONF.set_override('quota_driver', 'neutron.quota.ConfDriver',
                                  group='QUOTAS')

        class ExtensionTestExtensionManager(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(
                    resource_attribute_map)
                return extension_class.get_resources()

            def get_actions(self):
                return []

            def get_request_extensions(self):
                return []

        ext_mgr = ExtensionTestExtensionManager()
        self.ext_mdw = test_extensions.setup_extensions_middleware(ext_mgr)
        self.api = webtest.TestApp(self.ext_mdw)

    def _test_entity_delete(self, entity):
        """Does the entity deletion based on naming convention."""
        entity_id = str(uuid.uuid4())
        path = self._resource_prefix + '/' if self._resource_prefix else ''
        path += self._plural_mappings.get(entity, entity + 's')
        if self._translate_resource_name:
            path = path.replace('_', '-')
        res = self.api.delete(
            test_api_v2._get_path(path, id=entity_id, fmt=self.fmt))
        delete_entity = getattr(self.plugin.return_value, "delete_" + entity)
        delete_entity.assert_called_with(mock.ANY, entity_id)
        self.assertEqual(res.status_int, exc.HTTPNoContent.code)
