import unittest

from validation import validate_config


class ConfigValidationTest(unittest.TestCase):
    def test_optional_fields_must_be_strings(self) -> None:
        config = {
            "start_date": "2026-02-04",
            "start_time": "15:00",
            "repo_url": 123,
            "organizer_email": ["not", "a", "string"],
            "uid_namespace": {"bad": "type"},
            "blocked_weeks": [],
            "blocked_dates": [],
            "skip_day_after_ascension": False,
        }

        with self.assertRaises(ValueError) as ctx:
            validate_config(config)

        message = str(ctx.exception)
        self.assertIn("repo_url skal være en streng", message)
        self.assertIn("organizer_email skal være en streng", message)
        self.assertIn("uid_namespace skal være en streng", message)

    def test_optional_fields_accept_none_or_missing(self) -> None:
        config = {
            "start_date": "2026-02-04",
            "start_time": "15:00",
            "blocked_weeks": [],
            "blocked_dates": [],
            "skip_day_after_ascension": False,
            "repo_url": None,
        }

        validated = validate_config(config)
        self.assertEqual(validated["start_date"], "2026-02-04")