import re

from django.db import connection
from django.test import TestCase
from django.utils import timezone

from .models import TestModel


class FieldTest(TestCase):
    def get_db_value(self, field, model_id):
        cursor = connection.cursor()
        cursor.execute(
            'select {0} '
            'from package_test_testmodel '
            'where id = {1};'.format(field, model_id)
        )
        return cursor.fetchone()[0]

    def test_char_field_encrypted(self):
        plaintext = 'Oh hi, test reader!'

        model = TestModel()
        model.char = plaintext
        model.save()

        ciphertext = self.get_db_value('char', model.id)

        self.assertNotEqual(plaintext, ciphertext)
        self.assertTrue('test' not in ciphertext)

        fresh_model = TestModel.objects.get(id=model.id)
        self.assertEqual(fresh_model.char, plaintext)

    def test_text_field_encrypted(self):
        plaintext = 'Oh hi, test reader!' * 10

        model = TestModel()
        model.text = plaintext
        model.save()

        ciphertext = self.get_db_value('text', model.id)

        self.assertNotEqual(plaintext, ciphertext)
        self.assertTrue('test' not in ciphertext)

        fresh_model = TestModel.objects.get(id=model.id)
        self.assertEqual(fresh_model.text, plaintext)

    def test_datetime_field_encrypted(self):
        plaintext = timezone.now()

        model = TestModel()
        model.datetime = plaintext
        model.save()

        ciphertext = self.get_db_value('datetime', model.id)

        # Django's normal date serialization format
        self.assertTrue(re.search('^\d\d\d\d-\d\d-\d\d', ciphertext) is None)

        fresh_model = TestModel.objects.get(id=model.id)
        self.assertEqual(fresh_model.datetime, plaintext)

    def test_integer_field_encrypted(self):
        plaintext = 42

        model = TestModel()
        model.integer = plaintext
        model.save()

        ciphertext = self.get_db_value('integer', model.id)

        self.assertNotEqual(plaintext, ciphertext)
        self.assertNotEqual(plaintext, str(ciphertext))

        fresh_model = TestModel.objects.get(id=model.id)
        self.assertEqual(fresh_model.integer, plaintext)

    def test_date_field_encrypted(self):
        plaintext = timezone.now().date()

        model = TestModel()
        model.date = plaintext
        model.save()

        ciphertext = self.get_db_value('date', model.id)
        fresh_model = TestModel.objects.get(id=model.id)

        self.assertNotEqual(ciphertext, plaintext.isoformat())
        self.assertEqual(fresh_model.date, plaintext)

    def test_float_field_encrypted(self):
        plaintext = 42.44

        model = TestModel()
        model.floating = plaintext
        model.save()

        ciphertext = self.get_db_value('floating', model.id)

        self.assertNotEqual(plaintext, ciphertext)
        self.assertNotEqual(plaintext, str(ciphertext))

        fresh_model = TestModel.objects.get(id=model.id)
        self.assertEqual(fresh_model.floating, plaintext)

    def test_email_field_encrypted(self):
        plaintext = 'test@gmail.com'

        model = TestModel()
        model.email = plaintext
        model.save()

        ciphertext = self.get_db_value('email', model.id)

        self.assertNotEqual(plaintext, ciphertext)
        self.assertTrue('aron' not in ciphertext)

        fresh_model = TestModel.objects.get(id=model.id)
        self.assertEqual(fresh_model.email, plaintext)

    def test_boolean_field_encrypted(self):
        plaintext = True

        model = TestModel()
        model.boolean = plaintext
        model.save()

        ciphertext = self.get_db_value('boolean', model.id)

        self.assertNotEqual(plaintext, ciphertext)
        self.assertNotEqual(True, ciphertext)
        self.assertNotEqual('True', ciphertext)
        self.assertNotEqual('true', ciphertext)
        self.assertNotEqual('1', ciphertext)
        self.assertNotEqual(1, ciphertext)
        self.assertTrue(not isinstance(ciphertext, bool))

        fresh_model = TestModel.objects.get(id=model.id)
        self.assertEqual(fresh_model.boolean, plaintext)