# -*- coding: utf-8 -*-
"""
Tests for the service classes in verify_student.
"""

import ddt
from django.conf import settings
from mock import patch

from common.test.utils import MockS3Mixin
from lms.djangoapps.verify_student.models import SoftwareSecurePhotoVerification, SSOVerification, ManualVerification
from lms.djangoapps.verify_student.services import IDVerificationService
from student.tests.factories import UserFactory
from xmodule.modulestore.tests.django_utils import ModuleStoreTestCase
from xmodule.modulestore.tests.factories import CourseFactory

FAKE_SETTINGS = {
    "DAYS_GOOD_FOR": 10,
}


@patch.dict(settings.VERIFY_STUDENT, FAKE_SETTINGS)
@ddt.ddt
class TestIDVerificationService(MockS3Mixin, ModuleStoreTestCase):
    """
    Tests for IDVerificationService.
    """

    def test_user_is_verified(self):
        """
        Test to make sure we correctly answer whether a user has been verified.
        """
        user = UserFactory.create()
        attempt = SoftwareSecurePhotoVerification(user=user)
        attempt.save()

        # If it's any of these, they're not verified...
        for status in ["created", "ready", "denied", "submitted", "must_retry"]:
            attempt.status = status
            attempt.save()
            self.assertFalse(IDVerificationService.user_is_verified(user), status)

        attempt.status = "approved"
        attempt.save()
        self.assertTrue(IDVerificationService.user_is_verified(user), attempt.status)

    def test_user_has_valid_or_pending(self):
        """
        Determine whether we have to prompt this user to verify, or if they've
        already at least initiated a verification submission.
        """
        user = UserFactory.create()
        attempt = SoftwareSecurePhotoVerification(user=user)

        # If it's any of these statuses, they don't have anything outstanding
        for status in ["created", "ready", "denied"]:
            attempt.status = status
            attempt.save()
            self.assertFalse(IDVerificationService.user_has_valid_or_pending(user), status)

        # Any of these, and we are. Note the benefit of the doubt we're giving
        # -- must_retry, and submitted both count until we hear otherwise
        for status in ["submitted", "must_retry", "approved"]:
            attempt.status = status
            attempt.save()
            self.assertTrue(IDVerificationService.user_has_valid_or_pending(user), status)

    def test_user_status(self):
        # test for correct status when no error returned
        user = UserFactory.create()
        status = IDVerificationService.user_status(user)
        self.assertDictEqual(status, {'status': 'none', 'error': '', 'should_display': True})

        # test for when photo verification has been created
        SoftwareSecurePhotoVerification.objects.create(user=user, status='approved')
        status = IDVerificationService.user_status(user)
        self.assertDictEqual(status, {'status': 'approved', 'error': '', 'should_display': True})

        # create another photo verification for the same user, make sure the denial
        # is handled properly
        SoftwareSecurePhotoVerification.objects.create(
            user=user, status='denied', error_msg='[{"photoIdReasons": ["Not provided"]}]'
        )
        status = IDVerificationService.user_status(user)
        self.assertDictEqual(status, {'status': 'must_reverify', 'error': ['id_image_missing'], 'should_display': True})

        # test for when sso verification has been created
        SSOVerification.objects.create(user=user, status='approved')
        status = IDVerificationService.user_status(user)
        self.assertDictEqual(status, {'status': 'approved', 'error': '', 'should_display': False})

        # create another sso verification for the same user, make sure the denial
        # is handled properly
        SSOVerification.objects.create(user=user, status='denied')
        status = IDVerificationService.user_status(user)
        self.assertDictEqual(status, {'status': 'must_reverify', 'error': '', 'should_display': False})

        # test for when manual verification has been created
        ManualVerification.objects.create(user=user, status='approved')
        status = IDVerificationService.user_status(user)
        self.assertDictEqual(status, {'status': 'approved', 'error': '', 'should_display': False})

    @ddt.unpack
    @ddt.data(
        {'enrollment_mode': 'honor', 'status': None, 'output': 'N/A'},
        {'enrollment_mode': 'audit', 'status': None, 'output': 'N/A'},
        {'enrollment_mode': 'verified', 'status': False, 'output': 'Not ID Verified'},
        {'enrollment_mode': 'verified', 'status': True, 'output': 'ID Verified'},
    )
    def test_verification_status_for_user(self, enrollment_mode, status, output):
        """
        Verify verification_status_for_user returns correct status.
        """
        user = UserFactory.create()
        CourseFactory.create()

        with patch(
            'lms.djangoapps.verify_student.services.IDVerificationService.user_is_verified'
        ) as mock_verification:

            mock_verification.return_value = status

            status = IDVerificationService.verification_status_for_user(user, enrollment_mode)
            self.assertEqual(status, output)

    def test_get_verified_user_ids(self):
        """
        Tests for getting users that are verified.
        """
        user_a = UserFactory.create()
        user_b = UserFactory.create()
        user_c = UserFactory.create()
        user_unverified = UserFactory.create()
        user_denied = UserFactory.create()

        SoftwareSecurePhotoVerification.objects.create(user=user_a, status='approved')
        ManualVerification.objects.create(user=user_b, status='approved')
        SSOVerification.objects.create(user=user_c, status='approved')
        SSOVerification.objects.create(user=user_denied, status='denied')

        verified_user_ids = set(IDVerificationService.get_verified_user_ids([
            user_a, user_b, user_c, user_unverified, user_denied
        ]))
        expected_user_ids = {user_a.id, user_b.id, user_c.id}

        self.assertEqual(expected_user_ids, verified_user_ids)