from hashlib import md5

from django.contrib.auth.models import User
from django.contrib.sites.models import Site
from django.urls import reverse
from django.utils.http import urlencode

from allauth.socialaccount import providers
from allauth.socialaccount.models import SocialApp, SocialToken
from allauth.tests import Mock, TestCase, patch

from . import views
from .provider import DraugiemProvider


class DraugiemTests(TestCase):
    def setUp(self):
        # workaround to create a session. see:
        # https://code.djangoproject.com/ticket/11475
        User.objects.create_user(
            'anakin', 'skywalker@deathstar.example.com', 's1thrul3s')
        self.client.login(username='anakin', password='s1thrul3s')

        self.provider = providers.registry.by_id(DraugiemProvider.id)
        app = SocialApp.objects.create(provider=self.provider.id,
                                       name=self.provider.id,
                                       client_id='app123id',
                                       key=self.provider.id,
                                       secret='dummy')
        app.sites.add(Site.objects.get_current())
        self.app = app

    def get_draugiem_login_response(self):
        """
        Sample Draugiem.lv response
        """
        return {
            "apikey": "12345",
            "uid": "42",
            "users": {
                "42": {
                    "age": "266", "imgl":
                    "http://cdn.memegenerator.net/instances/500x/23395689.jpg",
                    "surname": "Skywalker", "url": "/user/42/", "imgi":
                    "http://cdn.memegenerator.net/instances/500x/23395689.jpg",
                    "nick": "Sky Guy", "created": "09.11.1812 11:26:15",
                    "deleted": "false", "imgm":
                    "http://cdn.memegenerator.net/instances/500x/23395689.jpg",
                    "sex": "M", "type": "User_Default", "uid": "42", "place":
                    "London", "emailHash":
                    "3f198f21434gfd2f2b4rs05939shk93f3815bc6aa", "name":
                    "Anakin", "adult": "1", "birthday": "1750-09-13", "img":
                    "http://cdn.memegenerator.net/instances/500x/23395689.jpg"
                }
            }
        }

    def get_socialaccount(self, response, token):
        """
        Returns SocialLogin based on the data from the request
        """
        request = Mock()
        login = self.provider.sociallogin_from_response(request, response)
        login.token = token
        return login

    def mock_socialaccount_state(self):
        """
        SocialLogin depends on Session state - a tuple of request
        params and a random string
        """
        session = self.client.session
        session['socialaccount_state'] = ({
            'process': 'login',
            'scope': '',
            'auth_params': ''
        }, '12345')
        session.save()

    def test_login_redirect(self):
        response = self.client.get(reverse(views.login))
        redirect_url = reverse(views.callback)
        full_redirect_url = "http://testserver" + redirect_url
        secret = self.app.secret + full_redirect_url
        redirect_url_hash = md5(secret.encode("utf-8")).hexdigest()
        params = {
            'app': self.app.client_id,
            'hash': redirect_url_hash,
            'redirect': full_redirect_url,
        }
        self.assertRedirects(response, '%s?%s' %
                             (views.AUTHORIZE_URL, urlencode(params)),
                             fetch_redirect_response=False)

    def test_callback_no_auth_status(self):
        response = self.client.get(reverse(views.callback))
        self.assertTemplateUsed(response,
                                "socialaccount/authentication_error.html")

    def test_callback_invalid_auth_status(self):
        response = self.client.get(reverse(views.callback),
                                   {'dr_auth_status': 'fail'})
        self.assertTemplateUsed(response,
                                "socialaccount/authentication_error.html")

    def test_callback(self):
        with patch(
                'allauth.socialaccount.providers.draugiem.views'
                '.draugiem_complete_login') as draugiem_complete_login:
            self.mock_socialaccount_state()

            response_json = self.get_draugiem_login_response()

            token = SocialToken(app=self.app, token=response_json['apikey'])
            login = self.get_socialaccount(response_json, token)

            draugiem_complete_login.return_value = login

            response = self.client.get(
                reverse(views.callback),
                {'dr_auth_status': 'ok',
                 'dr_auth_code': '42'})
            self.assertRedirects(response, '/accounts/profile/',
                                 fetch_redirect_response=False)
