from django.core.exceptions import ValidationError, NON_FIELD_ERRORS
from django.db import models

from modeltests.validation import ValidationTestCase
from models import *

from validators import TestModelsWithValidators
from test_unique import GetUniqueCheckTests, PerformUniqueChecksTest
from test_custom_messages import CustomMessagesTest


class BaseModelValidationTests(ValidationTestCase):

    def test_missing_required_field_raises_error(self):
        mtv = ModelToValidate(f_with_custom_validator=42)
        self.assertFailsValidation(mtv.full_validate, ['name', 'number'])

    def test_with_correct_value_model_validates(self):
        mtv = ModelToValidate(number=10, name='Some Name')
        self.assertEqual(None, mtv.full_validate())

    def test_custom_validate_method_is_called(self):
        mtv = ModelToValidate(number=11)
        self.assertFailsValidation(mtv.full_validate, [NON_FIELD_ERRORS, 'name'])

    def test_wrong_FK_value_raises_error(self):
        mtv=ModelToValidate(number=10, name='Some Name', parent_id=3)
        self.assertFailsValidation(mtv.full_validate, ['parent'])

    def test_correct_FK_value_validates(self):
        parent = ModelToValidate.objects.create(number=10, name='Some Name')
        mtv=ModelToValidate(number=10, name='Some Name', parent_id=parent.pk)
        self.assertEqual(None, mtv.full_validate())

    def test_wrong_email_value_raises_error(self):
        mtv = ModelToValidate(number=10, name='Some Name', email='not-an-email')
        self.assertFailsValidation(mtv.full_validate, ['email'])

    def test_correct_email_value_passes(self):
        mtv = ModelToValidate(number=10, name='Some Name', email='valid@email.com')
        self.assertEqual(None, mtv.full_validate())

    def test_wrong_url_value_raises_error(self):
        mtv = ModelToValidate(number=10, name='Some Name', url='not a url')
        self.assertFieldFailsValidationWithMessage(mtv.full_validate, 'url', [u'Enter a valid value.'])

    def test_correct_url_but_nonexisting_gives_404(self):
        mtv = ModelToValidate(number=10, name='Some Name', url='http://google.com/we-love-microsoft.html')
        self.assertFieldFailsValidationWithMessage(mtv.full_validate, 'url', [u'This URL appears to be a broken link.'])

    def test_correct_url_value_passes(self):
        mtv = ModelToValidate(number=10, name='Some Name', url='http://www.djangoproject.com/')
        self.assertEqual(None, mtv.full_validate()) # This will fail if there's no Internet connection

    def test_text_greater_that_charfields_max_length_eaises_erros(self):
        mtv = ModelToValidate(number=10, name='Some Name'*100)
        self.assertFailsValidation(mtv.full_validate, ['name',])