import unittest

from govoplan_forms_runtime.backend.dsar_provider import _normalized_email
from govoplan_forms_runtime.backend.email_normalization import normalize_status_email
from govoplan_forms_runtime.backend.status_access import _normalize_email


class EmailNormalizationTests(unittest.TestCase):
    def test_status_access_and_dsar_share_the_same_selector_policy(self) -> None:
        self.assertIs(normalize_status_email, _normalize_email)
        self.assertIs(normalize_status_email, _normalized_email)

    def test_existing_selector_results_remain_exact_at_policy_boundaries(self) -> None:
        boundary = "a" * 308 + "@example.org"
        values = (
            (None, None), (False, None), (0, None), ("", None), ("   ", None),
            (" Subject@Example.ORG ", "subject@example.org"),
            ("\u00a0Straße@BÜRO.Example\u00a0", "strasse@büro.example"),
            ("a+b@sub.example.org", "a+b@sub.example.org"),
            ("a..b@example..org", "a..b@example..org"),  # Existing policy, not a new RFC validator.
            ("a b@example.org", None), ("a@exa\tmple.org", None), ("a@exa\u00a0mple.org", None),
            ("a@@example.org", None), ("@example.org", None), ("a@example", None),
            ("a@.example.org", None), ("a@example.org.", None),
            (boundary, boundary), ("a" + boundary, None),
        )
        for value, expected in values:
            with self.subTest(value=value):
                self.assertEqual(expected, normalize_status_email(value))

    def test_selector_canonicalization_does_not_mutate_submitted_values(self) -> None:
        values = {"email": " Subject@Example.ORG ", "other": ["001", "  ", None]}
        self.assertEqual("subject@example.org", normalize_status_email(values["email"]))
        self.assertEqual({"email": " Subject@Example.ORG ", "other": ["001", "  ", None]}, values)


if __name__ == "__main__":
    unittest.main()