from __future__ import annotations

import unittest

from govoplan_core.i18n import (
    REFERENCE_LANGUAGE_CODE,
    normalize_enabled_language_codes,
    normalize_language_packages,
    preferred_language_code,
    system_i18n_payload,
)


class I18nReferenceLanguageTests(unittest.TestCase):
    def test_german_is_the_new_installation_reference_default(self) -> None:
        packages = normalize_language_packages()

        self.assertEqual("de", REFERENCE_LANGUAGE_CODE)
        self.assertEqual(["de", "en"], [item["code"] for item in packages])
        self.assertEqual(
            ["de", "en"],
            normalize_enabled_language_codes(None, packages),
        )
        self.assertEqual("de", system_i18n_payload(None)["default_language"])
        self.assertEqual("de", preferred_language_code(None, ()))


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