from django.core.exceptions import ValidationError
from django.forms import EmailField
from django.test import SimpleTestCase

from . import FormFieldAssertionsMixin


class EmailFieldTest(FormFieldAssertionsMixin, SimpleTestCase):

    def test_emailfield_1(self):
        f = EmailField()
        self.assertWidgetRendersTo(f, '<input type="email" name="f" id="id_f" required>')
        with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
            f.clean('')
        with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
            f.clean(None)
        self.assertEqual('person@example.com', f.clean('person@example.com'))
        with self.assertRaisesMessage(ValidationError, "'Enter a valid email address.'"):
            f.clean('foo')
        self.assertEqual(
            'local@domain.with.idn.xyz\xe4\xf6\xfc\xdfabc.part.com',
            f.clean('local@domain.with.idn.xyzäöüßabc.part.com')
        )

    def test_email_regexp_for_performance(self):
        f = EmailField()
        # Check for runaway regex security problem. This will take a long time
        # if the security fix isn't in place.
        addr = 'viewx3dtextx26qx3d@yahoo.comx26latlngx3d15854521645943074058'
        self.assertEqual(addr, f.clean(addr))

    def test_emailfield_not_required(self):
        f = EmailField(required=False)
        self.assertEqual('', f.clean(''))
        self.assertEqual('', f.clean(None))
        self.assertEqual('person@example.com', f.clean('person@example.com'))
        self.assertEqual('example@example.com', f.clean('      example@example.com  \t   \t '))
        with self.assertRaisesMessage(ValidationError, "'Enter a valid email address.'"):
            f.clean('foo')

    def test_emailfield_min_max_length(self):
        f = EmailField(min_length=10, max_length=15)
        self.assertWidgetRendersTo(
            f,
            '<input id="id_f" type="email" name="f" maxlength="15" minlength="10" required>',
        )
        with self.assertRaisesMessage(ValidationError, "'Ensure this value has at least 10 characters (it has 9).'"):
            f.clean('a@foo.com')
        self.assertEqual('alf@foo.com', f.clean('alf@foo.com'))
        with self.assertRaisesMessage(ValidationError, "'Ensure this value has at most 15 characters (it has 20).'"):
            f.clean('alf123456788@foo.com')

    def test_emailfield_strip_on_none_value(self):
        f = EmailField(required=False, empty_value=None)
        self.assertIsNone(f.clean(None))

    def test_emailfield_unable_to_set_strip_kwarg(self):
        msg = "__init__() got multiple values for keyword argument 'strip'"
        with self.assertRaisesMessage(TypeError, msg):
            EmailField(strip=False)