import json

from django.test import TestCase
from django.core.cache import cache

from labs.site_settings import SiteSettings
from labs.site_settings.loader import NAMESPACE_KEY
from labs.models import SiteSetting as DBSiteSetting


class TestSiteSetting(TestCase):
    def setUp(self):
        self._clear_cache_namespace()

    def _clear_cache_namespace(self):
        # Ensure that there is no cache conflict between each test.
        # Note: This only works when tests are run in Sequential Execution mode.
        cache.delete(NAMESPACE_KEY)

    def test_site_setting(self):
        self.assertEqual(SiteSettings.credit_voucher_notification_lark_app_id, "")
        self.assertEqual(SiteSettings.credit_voucher_notification_lark_app_secret, "")

        with self.assertRaises(DBSiteSetting.DoesNotExist):
            DBSiteSetting.objects.get(key="credit_voucher_notification_lark_app_id")

        with self.assertRaises(DBSiteSetting.DoesNotExist):
            DBSiteSetting.objects.get(key="credit_voucher_notification_lark_app_secret")

        cache_ns = cache.get(NAMESPACE_KEY)
        self.assertIsNotNone(cache_ns)

        app_id = "app_id_1234567890"
        app_id_db = DBSiteSetting.objects.create(
            key="credit_voucher_notification_lark_app_id",
            value=json.dumps(app_id),
            key_type="string",
        )
        self.assertEqual(SiteSettings.credit_voucher_notification_lark_app_id, app_id)

        # Cache namespace should be updated
        new_cache_ns = cache.get(NAMESPACE_KEY)
        self.assertNotEqual(cache_ns, new_cache_ns)

        new_app_id = "new_app_id_1234567890"
        app_id_db.value = json.dumps(new_app_id)
        app_id_db.save()
        self.assertEqual(
            SiteSettings.credit_voucher_notification_lark_app_id, new_app_id
        )

        # Cache namespace should be updated
        new_cache_ns_2 = cache.get(NAMESPACE_KEY)
        self.assertNotEqual(new_cache_ns, new_cache_ns_2)

    def test_not_exists_setting(self):
        with self.assertRaises(AttributeError):
            SiteSettings.not_exists_setting