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

# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# 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.

"""Tests for Direct API."""

import json

import webob

from nova import context
from nova import exception
from nova import test
from nova.api import direct


class ArbitraryObject(object):
    pass


class FakeService(object):
    def echo(self, context, data):
        return {'data': data}

    def context(self, context):
        return {'user': context.user_id,
                'project': context.project_id}

    def echo_data_directly(self, context, data):
        return data

    def invalid_return(self, context):
        return ArbitraryObject()


class MyLimited(direct.Limited):
    _allowed = ['var1', 'func1']


class MyProxy(object):
    var1 = var2 = True

    def func1(self):
        return True

    def func2(self):
        return True


class DirectTestCase(test.TestCase):
    def setUp(self):
        super(DirectTestCase, self).setUp()
        direct.register_service('fake', FakeService())
        self.router = direct.PostParamsMiddleware(
                direct.JsonParamsMiddleware(
                        direct.Router()))
        self.auth_router = direct.DelegatedAuthMiddleware(self.router)
        self.context = context.RequestContext('user1', 'proj1')

    def tearDown(self):
        direct.ROUTES = {}
        super(DirectTestCase, self).tearDown()

    def test_delegated_auth(self):
        req = webob.Request.blank('/fake/context')
        req.headers['X-OpenStack-User'] = 'user1'
        req.headers['X-OpenStack-Project'] = 'proj1'
        resp = req.get_response(self.auth_router)
        self.assertEqual(resp.status_int, 200)
        data = json.loads(resp.body)
        self.assertEqual(data['user'], 'user1')
        self.assertEqual(data['project'], 'proj1')

    def test_json_params(self):
        req = webob.Request.blank('/fake/echo')
        req.environ['openstack.context'] = self.context
        req.method = 'POST'
        req.body = 'json=%s' % json.dumps({'data': 'foo'})
        resp = req.get_response(self.router)
        self.assertEqual(resp.status_int, 200)
        resp_parsed = json.loads(resp.body)
        self.assertEqual(resp_parsed['data'], 'foo')

    def test_filter_json_params(self):
        req = webob.Request.blank('/fake/echo')
        req.environ['openstack.context'] = self.context
        req.method = 'POST'
        req.body = 'json=%s' % json.dumps({'data': 'foo',
                                           '_underscored': 'ignoreMe',
                                           'self': 'ignoreMe',
                                           'context': 'ignoreMe'})
        resp = req.get_response(self.router)
        self.assertEqual(resp.status_int, 200)
        resp_parsed = json.loads(resp.body)
        self.assertEqual(resp_parsed['data'], 'foo')
        self.assertNotIn('_underscored', resp_parsed)
        self.assertNotIn('self', resp_parsed)
        self.assertNotIn('context', resp_parsed)

    def test_post_params(self):
        req = webob.Request.blank('/fake/echo')
        req.environ['openstack.context'] = self.context
        req.method = 'POST'
        req.body = 'data=foo'
        resp = req.get_response(self.router)
        self.assertEqual(resp.status_int, 200)
        resp_parsed = json.loads(resp.body)
        self.assertEqual(resp_parsed['data'], 'foo')

    def test_filter_post_params(self):
        req = webob.Request.blank('/fake/echo')
        req.environ['openstack.context'] = self.context
        req.method = 'POST'
        req.body = ('data=foo&_underscored=ignoreMe&self=ignoreMe&context='
                    'ignoreMe')
        resp = req.get_response(self.router)
        self.assertEqual(resp.status_int, 200)
        resp_parsed = json.loads(resp.body)
        self.assertEqual(resp_parsed['data'], 'foo')
        self.assertNotIn('_underscored', resp_parsed)
        self.assertNotIn('self', resp_parsed)
        self.assertNotIn('context', resp_parsed)

    def test_string_resp(self):
        req = webob.Request.blank('/fake/echo_data_directly')
        req.environ['openstack.context'] = self.context
        req.method = 'POST'
        req.body = 'data=foo'
        resp = req.get_response(self.router)
        self.assertEqual(resp.status_int, 200)
        self.assertEqual(resp.body, 'foo')

    def test_invalid(self):
        req = webob.Request.blank('/fake/invalid_return')
        req.environ['openstack.context'] = self.context
        req.method = 'POST'
        self.assertRaises(exception.Error, req.get_response, self.router)

    def test_proxy(self):
        proxy = direct.Proxy(self.router)
        rv = proxy.fake.echo(self.context, data='baz')
        self.assertEqual(rv['data'], 'baz')


class LimitedTestCase(test.TestCase):
    def test_limited_class_getattr(self):
        limited = MyLimited(MyProxy())

        # Allowed are still visible
        self.assertTrue(limited.func1())
        self.assertTrue(limited.var1)

        # Non-allowed are no longer visible
        self.assertRaises(AttributeError, getattr, limited, 'func2')
        self.assertRaises(AttributeError, getattr, limited, 'var2')

    def test_limited_class_dir(self):
        limited = MyLimited(MyProxy())

        # Allowed are still visible
        self.assertIn('func1', dir(limited))
        self.assertIn('var1', dir(limited))

        # Non-allowed are no longer visible
        self.assertNotIn('func2', dir(limited))
        self.assertNotIn('var2', dir(limited))

    def test_limited_class_no_allowed(self):

        # New MyLimited class with no _allowed variable
        class MyLimited(direct.Limited):
            pass

        limited = MyLimited(MyProxy())

        # Nothing in MyProxy object visible now
        self.assertNotIn('func1', dir(limited))
        self.assertNotIn('var1', dir(limited))


# NOTE(jkoelker): This fails using the EC2 api
#class DirectCloudTestCase(test_cloud.CloudTestCase):
#    def setUp(self):
#        super(DirectCloudTestCase, self).setUp()
#        compute_handle = compute.API(image_service=self.cloud.image_service)
#        volume_handle = volume.API()
#        network_handle = network.API()
#        direct.register_service('compute', compute_handle)
#        direct.register_service('volume', volume_handle)
#        direct.register_service('network', network_handle)
#
#        self.router = direct.JsonParamsMiddleware(direct.Router())
#        proxy = direct.Proxy(self.router)
#        self.cloud.compute_api = proxy.compute
#        self.cloud.volume_api = proxy.volume
#        self.cloud.network_api = proxy.network
#        compute_handle.volume_api = proxy.volume
#        compute_handle.network_api = proxy.network
#
#    def tearDown(self):
#        super(DirectCloudTestCase, self).tearDown()
#        direct.ROUTES = {}