from django.db import connection
from django.db.models import CharField
from django.db.models.functions import SHA384
from django.test import TestCase
from django.test.utils import register_lookup

from ..models import Author


class SHA384Tests(TestCase):
    @classmethod
    def setUpTestData(cls):
        Author.objects.bulk_create([
            Author(alias='John Smith'),
            Author(alias='Jordan Élena'),
            Author(alias='皇帝'),
            Author(alias=''),
            Author(alias=None),
        ])

    def test_basic(self):
        authors = Author.objects.annotate(
            sha384_alias=SHA384('alias'),
        ).values_list('sha384_alias', flat=True).order_by('pk')
        self.assertSequenceEqual(
            authors,
            [
                '9df976bfbcf96c66fbe5cba866cd4deaa8248806f15b69c4010a404112906e4ca7b57e53b9967b80d77d4f5c2982cbc8',
                '72202c8005492016cc670219cce82d47d6d2d4273464c742ab5811d691b1e82a7489549e3a73ffa119694f90678ba2e3',
                'eda87fae41e59692c36c49e43279c8111a00d79122a282a944e8ba9a403218f049a48326676a43c7ba378621175853b0',
                '38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da274edebfe76f65fbd51ad2f14898b95b',
                '38b060a751ac96384cd9327eb1b1e36a21fdb71114be07434c0cc7bf63f6e1da274edebfe76f65fbd51ad2f14898b95b'
                if connection.features.interprets_empty_strings_as_nulls else None,
            ],
        )

    def test_transform(self):
        with register_lookup(CharField, SHA384):
            authors = Author.objects.filter(
                alias__sha384=(
                    '9df976bfbcf96c66fbe5cba866cd4deaa8248806f15b69c4010a404112906e4ca7b57e53b9967b80d77d4f5c2982cbc8'
                ),
            ).values_list('alias', flat=True)
            self.assertSequenceEqual(authors, ['John Smith'])