# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2012 Big Switch Networks, 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 contextlib
import mock
from oslo.config import cfg
import webob.exc

from neutron.common import constants
from neutron import context
from neutron.extensions import portbindings
from neutron import manager
from neutron.tests.unit import _test_extension_portbindings as test_bindings
from neutron.tests.unit.bigswitch import fake_server
from neutron.tests.unit.bigswitch import test_base
from neutron.tests.unit import test_api_v2
import neutron.tests.unit.test_db_plugin as test_plugin
import neutron.tests.unit.test_extension_allowedaddresspairs as test_addr_pair

patch = mock.patch
HTTPCON = 'neutron.plugins.bigswitch.servermanager.httplib.HTTPConnection'


class BigSwitchProxyPluginV2TestCase(test_base.BigSwitchTestBase,
                                     test_plugin.NeutronDbPluginV2TestCase):

    def setUp(self, plugin_name=None):
        if hasattr(self, 'HAS_PORT_FILTER'):
            cfg.CONF.set_override(
                'enable_security_group', self.HAS_PORT_FILTER, 'SECURITYGROUP')
        self.setup_config_files()
        self.setup_patches()
        if plugin_name:
            self._plugin_name = plugin_name
        super(BigSwitchProxyPluginV2TestCase,
              self).setUp(self._plugin_name)
        self.port_create_status = 'BUILD'
        self.startHttpPatch()


class TestBigSwitchProxyBasicGet(test_plugin.TestBasicGet,
                                 BigSwitchProxyPluginV2TestCase):

    pass


class TestBigSwitchProxyV2HTTPResponse(test_plugin.TestV2HTTPResponse,
                                       BigSwitchProxyPluginV2TestCase):

    def test_failover_memory(self):
        # first request causes failover so next shouldn't hit bad server
        with self.network() as net:
            kwargs = {'tenant_id': 'ExceptOnBadServer'}
            with self.network(**kwargs) as net:
                req = self.new_show_request('networks', net['network']['id'])
                res = req.get_response(self.api)
                self.assertEqual(res.status_int, 200)


class TestBigSwitchProxyPortsV2(test_plugin.TestPortsV2,
                                BigSwitchProxyPluginV2TestCase,
                                test_bindings.PortBindingsTestCase):

    VIF_TYPE = portbindings.VIF_TYPE_OVS
    HAS_PORT_FILTER = False

    def setUp(self, plugin_name=None):
        super(TestBigSwitchProxyPortsV2,
              self).setUp(self._plugin_name)

    def test_router_port_status_active(self):
        # router ports screw up port auto-deletion so it has to be
        # disabled for this test
        with self.network(do_delete=False) as net:
            with self.subnet(network=net, do_delete=False) as sub:
                with self.port(
                    subnet=sub,
                    no_delete=True,
                    device_owner=constants.DEVICE_OWNER_ROUTER_INTF
                ) as port:
                    # router ports should be immediately active
                    self.assertEqual(port['port']['status'], 'ACTIVE')

    def test_update_port_status_build(self):
        # normal ports go into the pending build state for async creation
        with self.port() as port:
            self.assertEqual(port['port']['status'], 'BUILD')
            self.assertEqual(self.port_create_status, 'BUILD')

    def _get_ports(self, netid):
        return self.deserialize('json',
                                self._list_ports('json', netid=netid))['ports']

    def test_rollback_for_port_create(self):
        plugin = manager.NeutronManager.get_plugin()
        with self.subnet() as s:
            # stop normal patch
            self.httpPatch.stop()
            # allow thread spawns for this test
            self.spawn_p.stop()
            kwargs = {'device_id': 'somedevid'}
            # put in a broken 'server'
            httpPatch = patch(HTTPCON, new=fake_server.HTTPConnectionMock500)
            httpPatch.start()
            with self.port(subnet=s, **kwargs):
                # wait for async port create request to finish
                plugin.evpool.waitall()
                # put good 'server' back in
                httpPatch.stop()
                self.httpPatch.start()
                ports = self._get_ports(s['subnet']['network_id'])
                #failure to create should result in port in error state
                self.assertEqual(ports[0]['status'], 'ERROR')

    def test_rollback_for_port_update(self):
        with self.network() as n:
            with self.port(network_id=n['network']['id'],
                           device_id='66') as port:
                port = self._get_ports(n['network']['id'])[0]
                data = {'port': {'name': 'aNewName', 'device_id': '99'}}
                # stop normal patch
                self.httpPatch.stop()
                with patch(HTTPCON, new=fake_server.HTTPConnectionMock500):
                    self.new_update_request(
                        'ports', data, port['id']).get_response(self.api)
                self.httpPatch.start()
                uport = self._get_ports(n['network']['id'])[0]
                # name should have stayed the same
                self.assertEqual(port['name'], uport['name'])

    def test_rollback_for_port_delete(self):
        with self.network() as n:
            with self.port(network_id=n['network']['id'],
                           device_id='somedevid') as port:
                # stop normal patch
                self.httpPatch.stop()
                with patch(HTTPCON, new=fake_server.HTTPConnectionMock500):
                    self._delete('ports', port['port']['id'],
                                 expected_code=
                                 webob.exc.HTTPInternalServerError.code)
                self.httpPatch.start()
                port = self._get_ports(n['network']['id'])[0]
                self.assertEqual('BUILD', port['status'])

    def test_correct_shared_net_tenant_id(self):
        # tenant_id in port requests should match network tenant_id instead
        # of port tenant_id
        def rest_port_op(self, ten_id, netid, port):
            if ten_id != 'SHARED':
                raise Exception('expecting tenant_id SHARED. got %s' % ten_id)
        with self.network(tenant_id='SHARED', shared=True) as net:
            with self.subnet(network=net) as sub:
                pref = 'neutron.plugins.bigswitch.servermanager.ServerPool.%s'
                tomock = [pref % 'rest_create_port',
                          pref % 'rest_update_port',
                          pref % 'rest_delete_port']
                patches = [patch(f, create=True, new=rest_port_op)
                           for f in tomock]
                for restp in patches:
                    restp.start()
                with self.port(subnet=sub, tenant_id='port-owner') as port:
                    data = {'port': {'binding:host_id': 'someotherhost',
                            'device_id': 'override_dev'}}
                    req = self.new_update_request('ports', data,
                                                  port['port']['id'])
                    res = req.get_response(self.api)
                    self.assertEqual(res.status_int, 200)

    def test_create404_triggers_sync(self):
        # allow async port thread for this patch
        self.spawn_p.stop()
        with contextlib.nested(
            self.subnet(),
            patch(HTTPCON, create=True,
                  new=fake_server.HTTPConnectionMock404),
            patch(test_base.RESTPROXY_PKG_PATH
                  + '.NeutronRestProxyV2._send_all_data')
        ) as (s, mock_http, mock_send_all):
            with self.port(subnet=s, device_id='somedevid') as p:
                # wait for the async port thread to finish
                plugin = manager.NeutronManager.get_plugin()
                plugin.evpool.waitall()
        call = mock.call(
            send_routers=True, send_ports=True, send_floating_ips=True,
            triggered_by_tenant=p['port']['tenant_id']
        )
        mock_send_all.assert_has_calls([call])
        self.spawn_p.start()

    def test_port_vif_details_default(self):
        kwargs = {'name': 'name', 'device_id': 'override_dev'}
        with self.port(**kwargs) as port:
            self.assertEqual(port['port']['binding:vif_type'],
                             portbindings.VIF_TYPE_OVS)

    def test_port_vif_details_override(self):
        # ivshost is in the test config to override to IVS
        kwargs = {'name': 'name', 'binding:host_id': 'ivshost',
                  'device_id': 'override_dev'}
        with self.port(**kwargs) as port:
            self.assertEqual(port['port']['binding:vif_type'],
                             portbindings.VIF_TYPE_IVS)
        kwargs = {'name': 'name2', 'binding:host_id': 'someotherhost',
                  'device_id': 'other_dev'}
        with self.port(**kwargs) as port:
            self.assertEqual(port['port']['binding:vif_type'], self.VIF_TYPE)

    def test_port_move(self):
        # ivshost is in the test config to override to IVS
        kwargs = {'name': 'name', 'binding:host_id': 'ivshost',
                  'device_id': 'override_dev'}
        with self.port(**kwargs) as port:
            data = {'port': {'binding:host_id': 'someotherhost',
                             'device_id': 'override_dev'}}
            req = self.new_update_request('ports', data, port['port']['id'])
            res = self.deserialize(self.fmt, req.get_response(self.api))
            self.assertEqual(res['port']['binding:vif_type'], self.VIF_TYPE)

    def _make_port(self, fmt, net_id, expected_res_status=None, arg_list=None,
                   **kwargs):
        arg_list = arg_list or ()
        arg_list += ('binding:host_id', )
        res = self._create_port(fmt, net_id, expected_res_status,
                                arg_list, **kwargs)
        # Things can go wrong - raise HTTP exc with res code only
        # so it can be caught by unit tests
        if res.status_int >= 400:
            raise webob.exc.HTTPClientError(code=res.status_int)
        return self.deserialize(fmt, res)


class TestVifDifferentDefault(BigSwitchProxyPluginV2TestCase):

    def setup_config_files(self):
        super(TestVifDifferentDefault, self).setup_config_files()
        cfg.CONF.set_override('vif_type', 'ivs', 'NOVA')

    def test_default_viftype(self):
        with self.port() as port:
            self.assertEqual(port['port']['binding:vif_type'], 'ivs')


class TestBigSwitchProxyNetworksV2(test_plugin.TestNetworksV2,
                                   BigSwitchProxyPluginV2TestCase):

    def _get_networks(self, tenant_id):
        ctx = context.Context('', tenant_id)
        return manager.NeutronManager.get_plugin().get_networks(ctx)

    def test_rollback_on_network_create(self):
        tid = test_api_v2._uuid()
        kwargs = {'tenant_id': tid}
        self.httpPatch.stop()
        with patch(HTTPCON, new=fake_server.HTTPConnectionMock500):
            self._create_network('json', 'netname', True, **kwargs)
        self.httpPatch.start()
        self.assertFalse(self._get_networks(tid))

    def test_rollback_on_network_update(self):
        with self.network() as n:
            data = {'network': {'name': 'aNewName'}}
            self.httpPatch.stop()
            with patch(HTTPCON, new=fake_server.HTTPConnectionMock500):
                self.new_update_request(
                    'networks', data, n['network']['id']
                ).get_response(self.api)
            self.httpPatch.start()
            updatedn = self._get_networks(n['network']['tenant_id'])[0]
            # name should have stayed the same due to failure
            self.assertEqual(n['network']['name'], updatedn['name'])

    def test_rollback_on_network_delete(self):
        with self.network() as n:
            self.httpPatch.stop()
            with patch(HTTPCON, new=fake_server.HTTPConnectionMock500):
                self._delete(
                    'networks', n['network']['id'],
                    expected_code=webob.exc.HTTPInternalServerError.code)
            self.httpPatch.start()
            # network should still exist in db
            self.assertEqual(n['network']['id'],
                             self._get_networks(n['network']['tenant_id']
                                                )[0]['id'])


class TestBigSwitchProxySubnetsV2(test_plugin.TestSubnetsV2,
                                  BigSwitchProxyPluginV2TestCase):

    pass


class TestBigSwitchProxySync(BigSwitchProxyPluginV2TestCase):

    def test_send_data(self):
        plugin_obj = manager.NeutronManager.get_plugin()
        result = plugin_obj._send_all_data()
        self.assertEqual(result[0], 200)


class TestBigSwitchAddressPairs(BigSwitchProxyPluginV2TestCase,
                                test_addr_pair.TestAllowedAddressPairs):
    pass