'''
Utilities for contentstore tests
'''

import json

from student.models import Registration
from django.contrib.auth.models import User
from django.test.client import Client
from django.test.utils import override_settings

from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
from xmodule.modulestore.tests.factories import CourseFactory
from contentstore.tests.modulestore_config import TEST_MODULESTORE


def parse_json(response):
    """Parse response, which is assumed to be json"""
    return json.loads(response.content)


def user(email):
    """look up a user by email"""
    return User.objects.get(email=email)


def registration(email):
    """look up registration object by email"""
    return Registration.objects.get(user__email=email)


@override_settings(MODULESTORE=TEST_MODULESTORE)
class CourseTestCase(ModuleStoreTestCase):
    def setUp(self):
        """
        These tests need a user in the DB so that the django Test Client
        can log them in.
        They inherit from the ModuleStoreTestCase class so that the mongodb collection
        will be cleared out before each test case execution and deleted
        afterwards.
        """
        uname = 'testuser'
        email = 'test+courses@edx.org'
        password = 'foo'

        # Create the use so we can log them in.
        self.user = User.objects.create_user(uname, email, password)

        # Note that we do not actually need to do anything
        # for registration if we directly mark them active.
        self.user.is_active = True
        # Staff has access to view all courses
        self.user.is_staff = True
        self.user.save()

        self.client = Client()
        self.client.login(username=uname, password=password)

        self.course = CourseFactory.create(
            org='MITx',
            number='999',
            display_name='Robot Super Course',
        )

    def createNonStaffAuthedUserClient(self):
        """
        Create a non-staff user, log them in, and return the client to use for testing.
        """
        uname = 'teststudent'
        password = 'foo'
        nonstaff = User.objects.create_user(uname, 'test+student@edx.org', password)

        # Note that we do not actually need to do anything
        # for registration if we directly mark them active.
        nonstaff.is_active = True
        nonstaff.is_staff = False
        nonstaff.save()

        client = Client()
        client.login(username=uname, password=password)
        return client, nonstaff
