"""
Unit tests for email feature flag in student dashboard. Additionally tests
that bulk email is always disabled for non-Mongo backed courses, regardless
of email feature flag, and that the view is conditionally available when
Course Auth is turned on.
"""
from __future__ import absolute_import

import unittest

from django.conf import settings
from django.urls import reverse

# This import is for an lms djangoapp.
# Its testcases are only run under lms.
from bulk_email.api import is_bulk_email_feature_enabled
from bulk_email.models import BulkEmailFlag, CourseAuthorization
from student.tests.factories import CourseEnrollmentFactory, UserFactory
from xmodule.modulestore.tests.django_utils import SharedModuleStoreTestCase
from xmodule.modulestore.tests.factories import CourseFactory


@unittest.skipUnless(settings.ROOT_URLCONF == 'lms.urls', 'Test only valid in lms')
class TestStudentDashboardEmailView(SharedModuleStoreTestCase):
    """
    Check for email view displayed with flag
    """
    @classmethod
    def setUpClass(cls):
        super(TestStudentDashboardEmailView, cls).setUpClass()
        cls.course = CourseFactory.create()

    def setUp(self):
        super(TestStudentDashboardEmailView, self).setUp()

        # Create student account
        student = UserFactory.create()
        CourseEnrollmentFactory.create(user=student, course_id=self.course.id)
        self.client.login(username=student.username, password="test")

        self.url = reverse('dashboard')
        # URL for email settings modal
        self.email_modal_link = (
            '<a href="#email-settings-modal" class="action action-email-settings" rel="leanModal" '
            'data-course-id="{org}/{num}/{name}" data-course-number="{num}" '
            'data-dashboard-index="0" data-optout="False">Email Settings</a>'
        ).format(
            org=self.course.org,
            num=self.course.number,
            name=self.course.display_name.replace(' ', '_'),
        )

    def tearDown(self):
        super(TestStudentDashboardEmailView, self).tearDown()
        BulkEmailFlag.objects.all().delete()

    def test_email_flag_true(self):
        BulkEmailFlag.objects.create(enabled=True, require_course_email_auth=False)
        # Assert that the URL for the email view is in the response
        response = self.client.get(self.url)
        self.assertIn(self.email_modal_link, response.content)

    def test_email_flag_false(self):
        BulkEmailFlag.objects.create(enabled=False)
        # Assert that the URL for the email view is not in the response
        response = self.client.get(self.url)
        self.assertNotIn(self.email_modal_link, response.content)

    def test_email_unauthorized(self):
        BulkEmailFlag.objects.create(enabled=True, require_course_email_auth=True)
        # Assert that instructor email is not enabled for this course
        self.assertFalse(is_bulk_email_feature_enabled(self.course.id))
        # Assert that the URL for the email view is not in the response
        # if this course isn't authorized
        response = self.client.get(self.url)
        self.assertNotIn(self.email_modal_link, response.content)

    def test_email_authorized(self):
        BulkEmailFlag.objects.create(enabled=True, require_course_email_auth=True)
        # Authorize the course to use email
        cauth = CourseAuthorization(course_id=self.course.id, email_enabled=True)
        cauth.save()
        # Assert that instructor email is enabled for this course
        self.assertTrue(is_bulk_email_feature_enabled(self.course.id))
        # Assert that the URL for the email view is not in the response
        # if this course isn't authorized
        response = self.client.get(self.url)
        self.assertIn(self.email_modal_link, response.content)