"""
Tests for content parsing, and form-overloaded content parsing.
"""
from django.contrib.auth.models import User
from django.contrib.auth import authenticate, login, logout
from django.contrib.sessions.middleware import SessionMiddleware
from django.test import TestCase, Client
from django.test.client import RequestFactory
from django.utils import simplejson as json
from rest_framework import status
from rest_framework.authentication import SessionAuthentication
from rest_framework.compat import patterns
from rest_framework.parsers import (
    BaseParser,
    FormParser,
    MultiPartParser,
    JSONParser
)
from rest_framework.request import Request
from rest_framework.response import Response
from rest_framework.settings import api_settings
from rest_framework.views import APIView
from rest_framework.compat import six


factory = RequestFactory()


class PlainTextParser(BaseParser):
    media_type = 'text/plain'

    def parse(self, stream, media_type=None, parser_context=None):
        """
        Returns a 2-tuple of `(data, files)`.

        `data` will simply be a string representing the body of the request.
        `files` will always be `None`.
        """
        return stream.read()


class TestMethodOverloading(TestCase):
    def test_method(self):
        """
        Request methods should be same as underlying request.
        """
        request = Request(factory.get('/'))
        self.assertEqual(request.method, 'GET')
        request = Request(factory.post('/'))
        self.assertEqual(request.method, 'POST')

    def test_overloaded_method(self):
        """
        POST requests can be overloaded to another method by setting a
        reserved form field
        """
        request = Request(factory.post('/', {api_settings.FORM_METHOD_OVERRIDE: 'DELETE'}))
        self.assertEqual(request.method, 'DELETE')


class TestContentParsing(TestCase):
    def test_standard_behaviour_determines_no_content_GET(self):
        """
        Ensure request.DATA returns None for GET request with no content.
        """
        request = Request(factory.get('/'))
        self.assertEqual(request.DATA, None)

    def test_standard_behaviour_determines_no_content_HEAD(self):
        """
        Ensure request.DATA returns None for HEAD request.
        """
        request = Request(factory.head('/'))
        self.assertEqual(request.DATA, None)

    def test_request_DATA_with_form_content(self):
        """
        Ensure request.DATA returns content for POST request with form content.
        """
        data = {'qwerty': 'uiop'}
        request = Request(factory.post('/', data))
        request.parsers = (FormParser(), MultiPartParser())
        self.assertEqual(list(request.DATA.items()), list(data.items()))

    def test_request_DATA_with_text_content(self):
        """
        Ensure request.DATA returns content for POST request with
        non-form content.
        """
        content = six.b('qwerty')
        content_type = 'text/plain'
        request = Request(factory.post('/', content, content_type=content_type))
        request.parsers = (PlainTextParser(),)
        self.assertEqual(request.DATA, content)

    def test_request_POST_with_form_content(self):
        """
        Ensure request.POST returns content for POST request with form content.
        """
        data = {'qwerty': 'uiop'}
        request = Request(factory.post('/', data))
        request.parsers = (FormParser(), MultiPartParser())
        self.assertEqual(list(request.POST.items()), list(data.items()))

    def test_standard_behaviour_determines_form_content_PUT(self):
        """
        Ensure request.DATA returns content for PUT request with form content.
        """
        data = {'qwerty': 'uiop'}

        from django import VERSION

        if VERSION >= (1, 5):
            from django.test.client import MULTIPART_CONTENT, BOUNDARY, encode_multipart
            request = Request(factory.put('/', encode_multipart(BOUNDARY, data),
                                  content_type=MULTIPART_CONTENT))
        else:
            request = Request(factory.put('/', data))

        request.parsers = (FormParser(), MultiPartParser())
        self.assertEqual(list(request.DATA.items()), list(data.items()))

    def test_standard_behaviour_determines_non_form_content_PUT(self):
        """
        Ensure request.DATA returns content for PUT request with
        non-form content.
        """
        content = six.b('qwerty')
        content_type = 'text/plain'
        request = Request(factory.put('/', content, content_type=content_type))
        request.parsers = (PlainTextParser(), )
        self.assertEqual(request.DATA, content)

    def test_overloaded_behaviour_allows_content_tunnelling(self):
        """
        Ensure request.DATA returns content for overloaded POST request.
        """
        json_data = {'foobar': 'qwerty'}
        content = json.dumps(json_data)
        content_type = 'application/json'
        form_data = {
            api_settings.FORM_CONTENT_OVERRIDE: content,
            api_settings.FORM_CONTENTTYPE_OVERRIDE: content_type
        }
        request = Request(factory.post('/', form_data))
        request.parsers = (JSONParser(), )
        self.assertEqual(request.DATA, json_data)

    # def test_accessing_post_after_data_form(self):
    #     """
    #     Ensures request.POST can be accessed after request.DATA in
    #     form request.
    #     """
    #     data = {'qwerty': 'uiop'}
    #     request = factory.post('/', data=data)
    #     self.assertEqual(request.DATA.items(), data.items())
    #     self.assertEqual(request.POST.items(), data.items())

    # def test_accessing_post_after_data_for_json(self):
    #     """
    #     Ensures request.POST can be accessed after request.DATA in
    #     json request.
    #     """
    #     data = {'qwerty': 'uiop'}
    #     content = json.dumps(data)
    #     content_type = 'application/json'
    #     parsers = (JSONParser, )

    #     request = factory.post('/', content, content_type=content_type,
    #                            parsers=parsers)
    #     self.assertEqual(request.DATA.items(), data.items())
    #     self.assertEqual(request.POST.items(), [])

    # def test_accessing_post_after_data_for_overloaded_json(self):
    #     """
    #     Ensures request.POST can be accessed after request.DATA in overloaded
    #     json request.
    #     """
    #     data = {'qwerty': 'uiop'}
    #     content = json.dumps(data)
    #     content_type = 'application/json'
    #     parsers = (JSONParser, )
    #     form_data = {Request._CONTENT_PARAM: content,
    #                  Request._CONTENTTYPE_PARAM: content_type}

    #     request = factory.post('/', form_data, parsers=parsers)
    #     self.assertEqual(request.DATA.items(), data.items())
    #     self.assertEqual(request.POST.items(), form_data.items())

    # def test_accessing_data_after_post_form(self):
    #     """
    #     Ensures request.DATA can be accessed after request.POST in
    #     form request.
    #     """
    #     data = {'qwerty': 'uiop'}
    #     parsers = (FormParser, MultiPartParser)
    #     request = factory.post('/', data, parsers=parsers)

    #     self.assertEqual(request.POST.items(), data.items())
    #     self.assertEqual(request.DATA.items(), data.items())

    # def test_accessing_data_after_post_for_json(self):
    #     """
    #     Ensures request.DATA can be accessed after request.POST in
    #     json request.
    #     """
    #     data = {'qwerty': 'uiop'}
    #     content = json.dumps(data)
    #     content_type = 'application/json'
    #     parsers = (JSONParser, )
    #     request = factory.post('/', content, content_type=content_type,
    #                            parsers=parsers)
    #     self.assertEqual(request.POST.items(), [])
    #     self.assertEqual(request.DATA.items(), data.items())

    # def test_accessing_data_after_post_for_overloaded_json(self):
    #     """
    #     Ensures request.DATA can be accessed after request.POST in overloaded
    #     json request
    #     """
    #     data = {'qwerty': 'uiop'}
    #     content = json.dumps(data)
    #     content_type = 'application/json'
    #     parsers = (JSONParser, )
    #     form_data = {Request._CONTENT_PARAM: content,
    #                  Request._CONTENTTYPE_PARAM: content_type}

    #     request = factory.post('/', form_data, parsers=parsers)
    #     self.assertEqual(request.POST.items(), form_data.items())
    #     self.assertEqual(request.DATA.items(), data.items())


class MockView(APIView):
    authentication_classes = (SessionAuthentication,)

    def post(self, request):
        if request.POST.get('example') is not None:
            return Response(status=status.HTTP_200_OK)

        return Response(status=status.INTERNAL_SERVER_ERROR)

urlpatterns = patterns('',
    (r'^$', MockView.as_view()),
)


class TestContentParsingWithAuthentication(TestCase):
    urls = 'rest_framework.tests.request'

    def setUp(self):
        self.csrf_client = Client(enforce_csrf_checks=True)
        self.username = 'john'
        self.email = 'lennon@thebeatles.com'
        self.password = 'password'
        self.user = User.objects.create_user(self.username, self.email, self.password)

    def test_user_logged_in_authentication_has_POST_when_not_logged_in(self):
        """
        Ensures request.POST exists after SessionAuthentication when user
        doesn't log in.
        """
        content = {'example': 'example'}

        response = self.client.post('/', content)
        self.assertEqual(status.HTTP_200_OK, response.status_code)

        response = self.csrf_client.post('/', content)
        self.assertEqual(status.HTTP_200_OK, response.status_code)

    # def test_user_logged_in_authentication_has_post_when_logged_in(self):
    #     """Ensures request.POST exists after UserLoggedInAuthentication when user does log in"""
    #     self.client.login(username='john', password='password')
    #     self.csrf_client.login(username='john', password='password')
    #     content = {'example': 'example'}

    #     response = self.client.post('/', content)
    #     self.assertEqual(status.OK, response.status_code, "POST data is malformed")

    #     response = self.csrf_client.post('/', content)
    #     self.assertEqual(status.OK, response.status_code, "POST data is malformed")


class TestUserSetter(TestCase):

    def setUp(self):
        # Pass request object through session middleware so session is
        # available to login and logout functions
        self.request = Request(factory.get('/'))
        SessionMiddleware().process_request(self.request)

        User.objects.create_user('ringo', 'starr@thebeatles.com', 'yellow')
        self.user = authenticate(username='ringo', password='yellow')

    def test_user_can_be_set(self):
        self.request.user = self.user
        self.assertEqual(self.request.user, self.user)

    def test_user_can_login(self):
        login(self.request, self.user)
        self.assertEqual(self.request.user, self.user)

    def test_user_can_logout(self):
        self.request.user = self.user
        self.assertFalse(self.request.user.is_anonymous())
        logout(self.request)
        self.assertTrue(self.request.user.is_anonymous())


class TestAuthSetter(TestCase):

    def test_auth_can_be_set(self):
        request = Request(factory.get('/'))
        request.auth = 'DUMMY'
        self.assertEqual(request.auth, 'DUMMY')