# Copyright 2014 Cisco Systems, Inc.  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 networking_cisco import backwards_compatibility as bc
from networking_cisco.backwards_compatibility import attributes
from networking_cisco.backwards_compatibility import l3_const
import networking_cisco.plugins
from networking_cisco.plugins.cisco.db.l3 import l3_router_appliance_db
from networking_cisco.plugins.cisco.db.l3 import routertype_db
from networking_cisco.plugins.cisco.db.scheduler import (
    l3_routertype_aware_schedulers_db as router_sch_db)
from networking_cisco.plugins.cisco.extensions import routerhostingdevice
from networking_cisco.plugins.cisco.extensions import routerrole
from networking_cisco.plugins.cisco.extensions import routertype

from neutron.common import test_lib
from neutron.db import common_db_mixin
from neutron.extensions import l3
from neutron.extensions import standardattrdescription


L3_PLUGIN_KLASS = (
    'networking_cisco.tests.unit.cisco.l3.l3_router_test_support.'
    'TestL3RouterServicePlugin')
extensions_path = networking_cisco.plugins.__path__[0] + '/cisco/extensions'


class L3RouterTestSupportMixin(object):

    _is_ha_tests = False

    def _mock_get_routertype_scheduler_always_none(self):
        self.get_routertype_scheduler_fcn_p = mock.patch(
            'networking_cisco.plugins.cisco.db.l3.l3_router_appliance_db.'
            'L3RouterApplianceDBMixin._get_router_type_scheduler',
            mock.Mock(return_value=None))
        self.get_routertype_scheduler_fcn_p.start()

    def _mock_backlog_processing(self, plugin):
        mock.patch.object(plugin, '_is_master_process',
                          return_value=True).start()
        mock.patch.object(plugin, '_setup_backlog_handling').start()

    def _add_router_plugin_ini_file(self):
        # includes config file for router service plugin
        if hasattr(self, '_is_ha_tests') and self._is_ha_tests is True:
            cfg_file = (
                networking_cisco.__path__[0] +
                '/tests/unit/cisco/etc/ha/cisco_router_plugin.ini')
        else:
            cfg_file = (
                networking_cisco.__path__[0] +
                '/tests/unit/cisco/etc/cisco_router_plugin.ini')
        if 'config_files' in test_lib.test_config:
            test_lib.test_config['config_files'].append(cfg_file)
        else:
            test_lib.test_config['config_files'] = [cfg_file]


class TestL3RouterBaseExtensionManager(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
        # first, add hosting device attribute to router resource
        l3_const.RESOURCE_ATTRIBUTE_MAP['routers'].update(
            routerhostingdevice.EXTENDED_ATTRIBUTES_2_0['routers'])
        # also add role attribute to router resource
        l3_const.RESOURCE_ATTRIBUTE_MAP['routers'].update(
            routerrole.EXTENDED_ATTRIBUTES_2_0['routers'])
        # also add routertype attribute to router resource
        l3_const.RESOURCE_ATTRIBUTE_MAP['routers'].update(
            routertype.EXTENDED_ATTRIBUTES_2_0['routers'])
        # also add description attribute to router and fip resources
        ext_res = (standardattrdescription.Standardattrdescription().
                   get_extended_resources("2.0"))
        if 'routers' in ext_res:
            l3_const.RESOURCE_ATTRIBUTE_MAP['routers'].update(
                    ext_res['routers'])
        if 'floatingips' in ext_res:
            (l3_const.RESOURCE_ATTRIBUTE_MAP['floatingips'].
             update(ext_res['floatingips']))
        # finally, extend the global attribute map
        attributes.RESOURCES.update(
            l3_const.RESOURCE_ATTRIBUTE_MAP)
        res = l3.L3.get_resources()
        # add routertype resource
        for item in routertype.Routertype.get_resources():
            res.append(item)
        return res

    def get_actions(self):
        return []

    def get_request_extensions(self):
        return []


# A L3 routing service plugin class supporting the routertype and
# routerhost:hostingdevice extensions
class TestL3RouterServicePlugin(
    common_db_mixin.CommonDbMixin,
    routertype_db.RoutertypeDbMixin,
    l3_router_appliance_db.L3RouterApplianceDBMixin,
    # we need the router scheduling db but do not expose the scheduling
    # REST operations
        router_sch_db.L3RouterTypeAwareSchedulerDbMixin):

    supported_extension_aliases = [
        "router",
        "standard-attr-description",
        routerhostingdevice.ROUTERHOSTINGDEVICE_ALIAS,
        routerrole.ROUTERROLE_ALIAS,
        routertype.ROUTERTYPE_ALIAS]

    def get_plugin_type(self):
        return bc.constants.L3

    def get_plugin_description(self):
        return "L3 Routing Service Plugin for testing"

    def cleanup_after_test(self):
        """This function should be called in the TearDown() function of
        test classes that use the plugin.

        Reset all class variables to their default values.
        This is needed to avoid tests to pollute subsequent tests.
        """
        TestL3RouterServicePlugin._router_schedulers = {}
        TestL3RouterServicePlugin._router_drivers = {}
        TestL3RouterServicePlugin._namespace_router_type_id = None
        TestL3RouterServicePlugin._backlogged_routers = set()
        TestL3RouterServicePlugin._refresh_router_backlog = True
