"""Tests for bundeslaender.py — sanity over 16-state registry.

Includes the #48 classification regression: TH must be ParlDok, HB must
be StarWeb, SN must be Eigensystem (not ParlDok).
"""
from app.bundeslaender import BUNDESLAENDER, get, aktive_bundeslaender, alle_bundeslaender


class TestRegistryStructure:
    def test_sixteen_bundeslaender(self):
        assert len(BUNDESLAENDER) == 16

    def test_codes_are_uppercase(self):
        for code in BUNDESLAENDER:
            assert code.isupper(), f"{code} is not uppercase"

    def test_each_entry_has_naechste_wahl_or_none(self):
        for code, bl in BUNDESLAENDER.items():
            assert bl.naechste_wahl is None or len(bl.naechste_wahl) == 10

    def test_wahlperiode_is_positive_integer(self):
        for bl in BUNDESLAENDER.values():
            assert isinstance(bl.wahlperiode, int) and bl.wahlperiode > 0


class TestActiveBundeslaender:
    def test_four_active_bundeslaender(self):
        active = aktive_bundeslaender()
        codes = {bl.code for bl in active}
        assert codes == {"NRW", "LSA", "MV", "BE"}

    def test_alle_bundeslaender_returns_all_sixteen(self):
        assert len(alle_bundeslaender()) == 16

    def test_alle_bundeslaender_active_first(self):
        out = alle_bundeslaender()
        active_codes = {bl.code for bl in aktive_bundeslaender()}
        # The first len(active) entries must all be active
        for bl in out[: len(active_codes)]:
            assert bl.code in active_codes


class TestGetHelper:
    def test_returns_bundesland_for_known_code(self):
        bl = get("NRW")
        assert bl is not None
        assert bl.name == "Nordrhein-Westfalen"

    def test_returns_none_for_unknown_code(self):
        assert get("XX") is None


class TestClassificationFix48:
    """Regression: #48 corrected three doku_system entries that the
    follow-up adapter issues depend on."""

    def test_th_is_parldok_not_starweb(self):
        assert BUNDESLAENDER["TH"].doku_system == "ParlDok"

    def test_hb_is_starweb_not_paris(self):
        """PARiS is just a StarWeb skin — must be classified as StarWeb."""
        assert BUNDESLAENDER["HB"].doku_system == "StarWeb"

    def test_sn_is_eigensystem_not_parldok(self):
        """EDAS is ASP.NET-Webforms, NOT ParlDok-compatible with MV."""
        assert BUNDESLAENDER["SN"].doku_system == "Eigensystem"


class TestWahltermineSane:
    """All upcoming elections must be in chronological order and in the
    near future (sanity check that someone has not pasted a 1990 date)."""

    def test_no_election_before_2026(self):
        for bl in BUNDESLAENDER.values():
            if bl.naechste_wahl:
                assert bl.naechste_wahl >= "2026-01-01"

    def test_no_election_after_2035(self):
        for bl in BUNDESLAENDER.values():
            if bl.naechste_wahl:
                assert bl.naechste_wahl < "2035-01-01"