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

# Copyright 2013 VMware, 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.

"""
Unit tests for extension extended attribute
"""

from oslo.config import cfg
import unittest2 as unittest
import webob.exc as webexc

import quantum
from quantum.api import extensions
from quantum.common import config
from quantum import manager
from quantum.plugins.common import constants
from quantum.plugins.openvswitch import ovs_quantum_plugin
from quantum.tests.unit.extensions import extendedattribute as extattr
from quantum.tests.unit import test_api_v2
from quantum.tests.unit import testlib_api
from quantum import wsgi

_uuid = test_api_v2._uuid
_get_path = test_api_v2._get_path
extensions_path = ':'.join(quantum.tests.unit.extensions.__path__)


class ExtensionExtendedAttributeTestPlugin(
    ovs_quantum_plugin.OVSQuantumPluginV2):

    supported_extension_aliases = [
        'ext-obj-test', "extended-ext-attr"
    ]

    def __init__(self, configfile=None):
        super(ExtensionExtendedAttributeTestPlugin, self)
        self.objs = []
        self.objh = {}

    def create_ext_test_resource(self, context, ext_test_resource):
        obj = ext_test_resource['ext_test_resource']
        id = _uuid()
        obj['id'] = id
        self.objs.append(obj)
        self.objh.update({id: obj})
        return obj

    def get_ext_test_resources(self, context, filters=None, fields=None):
        return self.objs

    def get_ext_test_resource(self, context, id, fields=None):
        return self.objh[id]


class ExtensionExtendedAttributeTestCase(unittest.TestCase):
    def setUp(self):
        plugin = (
            "quantum.tests.unit.test_extension_extended_attribute."
            "ExtensionExtendedAttributeTestPlugin"
        )

        # point config file to: quantum/tests/etc/quantum.conf.test
        args = ['--config-file', test_api_v2.etcdir('quantum.conf.test')]
        config.parse(args=args)

        cfg.CONF.set_override('core_plugin', plugin)

        manager.QuantumManager._instance = None

        ext_mgr = extensions.PluginAwareExtensionManager(
            extensions_path,
            {constants.CORE: ExtensionExtendedAttributeTestPlugin}
        )
        ext_mgr.extend_resources("2.0", {})
        extensions.PluginAwareExtensionManager._instance = ext_mgr

        app = config.load_paste_app('extensions_test_app')
        self._api = extensions.ExtensionMiddleware(app, ext_mgr=ext_mgr)

        self._tenant_id = "8c70909f-b081-452d-872b-df48e6c355d1"

    def tearDown(self):
        # restore original resource attribute map before
        self._api = None
        cfg.CONF.reset()

    def _do_request(self, method, path, data=None, params=None, action=None):
        content_type = 'application/json'
        body = None
        if data is not None:  # empty dict is valid
            body = wsgi.Serializer().serialize(data, content_type)

        req = testlib_api.create_request(
            path, body, content_type,
            method, query_string=params)
        res = req.get_response(self._api)
        if res.status_code >= 400:
            raise webexc.HTTPClientError(detail=res.body, code=res.status_code)
        if res.status_code != webexc.HTTPNoContent.code:
            return res.json

    def _ext_test_resource_create(self, attr=None):
        data = {
            "ext_test_resource": {
                "tenant_id": self._tenant_id,
                "name": "test",
                extattr.EXTENDED_ATTRIBUTE: attr
            }
        }

        res = self._do_request('POST', _get_path('ext_test_resources'), data)
        return res['ext_test_resource']

    def test_ext_test_resource_create(self):
        ext_test_resource = self._ext_test_resource_create()
        attr = _uuid()
        ext_test_resource = self._ext_test_resource_create(attr)
        self.assertEqual(ext_test_resource[extattr.EXTENDED_ATTRIBUTE], attr)

    def test_ext_test_resource_get(self):
        attr = _uuid()
        obj = self._ext_test_resource_create(attr)
        obj_id = obj['id']
        res = self._do_request('GET', _get_path(
            'ext_test_resources/{0}'.format(obj_id)))
        obj2 = res['ext_test_resource']
        self.assertEqual(obj2[extattr.EXTENDED_ATTRIBUTE], attr)