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

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

"""
Test WSGI basics and provide some helper functions for other WSGI tests.
"""

from nova import test

import routes
import webob

from nova import wsgi


class Test(test.TestCase):

    def test_debug(self):

        class Application(wsgi.Application):
            """Dummy application to test debug."""

            def __call__(self, environ, start_response):
                start_response("200", [("X-Test", "checking")])
                return ['Test result']

        application = wsgi.Debug(Application())
        result = webob.Request.blank('/').get_response(application)
        self.assertEqual(result.body, "Test result")

    def test_router(self):

        class Application(wsgi.Application):
            """Test application to call from router."""

            def __call__(self, environ, start_response):
                start_response("200", [])
                return ['Router result']

        class Router(wsgi.Router):
            """Test router."""

            def __init__(self):
                mapper = routes.Mapper()
                mapper.connect("/test", controller=Application())
                super(Router, self).__init__(mapper)

        result = webob.Request.blank('/test').get_response(Router())
        self.assertEqual(result.body, "Router result")
        result = webob.Request.blank('/bad').get_response(Router())
        self.assertNotEqual(result.body, "Router result")

    def test_controller(self):

        class Controller(wsgi.Controller):
            """Test controller to call from router."""
            test = self

            def show(self, req, id):  # pylint: disable-msg=W0622,C0103
                """Default action called for requests with an ID."""
                self.test.assertEqual(req.path_info, '/tests/123')
                self.test.assertEqual(id, '123')
                return id

        class Router(wsgi.Router):
            """Test router."""

            def __init__(self):
                mapper = routes.Mapper()
                mapper.resource("test", "tests", controller=Controller())
                super(Router, self).__init__(mapper)

        result = webob.Request.blank('/tests/123').get_response(Router())
        self.assertEqual(result.body, "123")
        result = webob.Request.blank('/test/123').get_response(Router())
        self.assertNotEqual(result.body, "123")


class SerializerTest(test.TestCase):

    def match(self, url, accept, expect):
        input_dict = dict(servers=dict(a=(2, 3)))
        expected_xml = '<servers><a>(2,3)</a></servers>'
        expected_json = '{"servers":{"a":[2,3]}}'
        req = webob.Request.blank(url, headers=dict(Accept=accept))
        result = wsgi.Serializer(req.environ).to_content_type(input_dict)
        result = result.replace('\n', '').replace(' ', '')
        if expect == 'xml':
            self.assertEqual(result, expected_xml)
        elif expect == 'json':
            self.assertEqual(result, expected_json)
        else:
            raise "Bad expect value"

    def test_basic(self):
        self.match('/servers/4.json', None, expect='json')
        self.match('/servers/4', 'application/json', expect='json')
        self.match('/servers/4', 'application/xml', expect='xml')
        self.match('/servers/4.xml', None, expect='xml')

    def test_defaults_to_json(self):
        self.match('/servers/4', None, expect='json')
        self.match('/servers/4', 'text/html', expect='json')

    def test_suffix_takes_precedence_over_accept_header(self):
        self.match('/servers/4.xml', 'application/json', expect='xml')
        self.match('/servers/4.xml.', 'application/json', expect='json')

    def test_deserialize(self):
        xml = """
            <a a1="1" a2="2">
              <bs><b>1</b><b>2</b><b>3</b><b><c c1="1"/></b></bs>
              <d><e>1</e></d>
              <f>1</f>
            </a>
            """.strip()
        as_dict = dict(a={
                'a1': '1',
                'a2': '2',
                'bs': ['1', '2', '3', {'c': dict(c1='1')}],
                'd': {'e': '1'},
                'f': '1'})
        metadata = {'application/xml': dict(plurals={'bs': 'b', 'ts': 't'})}
        serializer = wsgi.Serializer({}, metadata)
        self.assertEqual(serializer.deserialize(xml), as_dict)

    def test_deserialize_empty_xml(self):
        xml = """<a></a>"""
        as_dict = {"a": {}}
        serializer = wsgi.Serializer({})
        self.assertEqual(serializer.deserialize(xml), as_dict)
