from datetime import date

from django.contrib.auth import authenticate
from django.contrib.auth.models import User
from django.contrib.auth.tokens import PasswordResetTokenGenerator
from django.contrib.auth.views import (
    PasswordChangeDoneView, PasswordChangeView, PasswordResetCompleteView,
    PasswordResetDoneView, PasswordResetView,
)
from django.test import RequestFactory, TestCase, override_settings
from django.urls import reverse
from django.utils.http import urlsafe_base64_encode

from .client import PasswordResetConfirmClient
from .models import CustomUser


@override_settings(ROOT_URLCONF='auth_tests.urls')
class AuthTemplateTests(TestCase):
    request_factory = RequestFactory()

    @classmethod
    def setUpTestData(cls):
        user = User.objects.create_user('jsmith', 'jsmith@example.com', 'pass')
        user = authenticate(username=user.username, password='pass')
        request = cls.request_factory.get('/somepath/')
        request.user = user
        cls.user, cls.request = user, request

    def test_password_reset_view(self):
        response = PasswordResetView.as_view(success_url='dummy/')(self.request)
        self.assertContains(response, '<title>Password reset | Django site admin</title>')
        self.assertContains(response, '<h1>Password reset</h1>')

    def test_password_reset_done_view(self):
        response = PasswordResetDoneView.as_view()(self.request)
        self.assertContains(response, '<title>Password reset sent | Django site admin</title>')
        self.assertContains(response, '<h1>Password reset sent</h1>')

    def test_password_reset_confirm_view_invalid_token(self):
        # PasswordResetConfirmView invalid token
        client = PasswordResetConfirmClient()
        url = reverse('password_reset_confirm', kwargs={'uidb64': 'Bad', 'token': 'Bad-Token'})
        response = client.get(url)
        self.assertContains(response, '<title>Password reset unsuccessful | Django site admin</title>')
        self.assertContains(response, '<h1>Password reset unsuccessful</h1>')

    def test_password_reset_confirm_view_valid_token(self):
        # PasswordResetConfirmView valid token
        client = PasswordResetConfirmClient()
        default_token_generator = PasswordResetTokenGenerator()
        token = default_token_generator.make_token(self.user)
        uidb64 = urlsafe_base64_encode(str(self.user.pk).encode())
        url = reverse('password_reset_confirm', kwargs={'uidb64': uidb64, 'token': token})
        response = client.get(url)
        self.assertContains(response, '<title>Enter new password | Django site admin</title>')
        self.assertContains(response, '<h1>Enter new password</h1>')
        # The username is added to the password reset confirmation form to help
        # browser's password managers.
        self.assertContains(
            response,
            '<input class="hidden" autocomplete="username" value="jsmith">',
        )

    @override_settings(AUTH_USER_MODEL='auth_tests.CustomUser')
    def test_password_reset_confirm_view_custom_username_hint(self):
        custom_user = CustomUser.custom_objects.create_user(
            email='joe@example.com',
            date_of_birth=date(1986, 11, 11),
            first_name='Joe',
        )
        client = PasswordResetConfirmClient()
        default_token_generator = PasswordResetTokenGenerator()
        token = default_token_generator.make_token(custom_user)
        uidb64 = urlsafe_base64_encode(str(custom_user.pk).encode())
        url = reverse('password_reset_confirm', kwargs={'uidb64': uidb64, 'token': token})
        response = client.get(url)
        self.assertContains(
            response,
            '<title>Enter new password | Django site admin</title>',
        )
        self.assertContains(response, '<h1>Enter new password</h1>')
        # The username field is added to the password reset confirmation form
        # to help browser's password managers.
        self.assertContains(
            response,
            '<input class="hidden" autocomplete="username" value="joe@example.com">',
        )

    def test_password_reset_complete_view(self):
        response = PasswordResetCompleteView.as_view()(self.request)
        self.assertContains(response, '<title>Password reset complete | Django site admin</title>')
        self.assertContains(response, '<h1>Password reset complete</h1>')

    def test_password_reset_change_view(self):
        response = PasswordChangeView.as_view(success_url='dummy/')(self.request)
        self.assertContains(response, '<title>Password change | Django site admin</title>')
        self.assertContains(response, '<h1>Password change</h1>')

    def test_password_change_done_view(self):
        response = PasswordChangeDoneView.as_view()(self.request)
        self.assertContains(response, '<title>Password change successful | Django site admin</title>')
        self.assertContains(response, '<h1>Password change successful</h1>')