"""Deterministische Tests des Kennzeichen-Postprocessings (Phase 4)."""
from app.config import settings
from app.services.plate_postprocessor import PlatePostprocessor

PP = PlatePostprocessor(settings.path(settings.regions_de_file))


def test_region_rostock():
    r = PP.process("HRO AB 123", 0.9)
    assert r.region_code == "HRO"
    assert r.region_name == "Rostock"
    assert r.region_state == "Mecklenburg-Vorpommern"
    assert r.normalized == "HRO-AB-123"
    assert r.plate_type == "standard"


def test_region_berlin_single_letter():
    r = PP.process("B AB 1234", 0.9)
    assert r.region_code == "B"
    assert r.region_name == "Berlin"
    assert r.normalized == "B-AB-1234"


def test_region_muenchen():
    r = PP.process("M X 99", 0.8)
    assert r.region_code == "M"
    assert r.region_name == "München"


def test_electric_suffix():
    r = PP.process("HH AB 123 E", 0.9)
    assert r.plate_type == "electric"
    assert r.normalized.endswith("E")


def test_historic_suffix():
    r = PP.process("K AB 12 H", 0.9)
    assert r.plate_type == "historic"


def test_normalization_removes_noise():
    r = PP.process("hro-ab-123", 0.7)
    assert r.normalized == "HRO-AB-123"


def test_season_plate():
    # Saisonkennzeichen: Monate 04..10 rechts angehaengt
    r = PP.process("HRO AB 12 0410", 0.8)
    assert r.season == "04-10"
    assert r.plate_type == "season"


def test_careful_correction_zero_to_o():
    # '0RO' -> 'ORO'? Nein: HR0 (Ziffer 0) am Bezirksende -> HRO (Buchstabe O)
    r = PP.process("HR0 AB 123", 0.9)
    assert r.region_code == "HRO"
    assert any("->" in c for c in r.corrections)
    assert r.confidence < 0.9  # Korrektur senkt Confidence


def test_unknown_region_no_crash():
    r = PP.process("ZZZ QQ 1", 0.5)
    # ZZZ ist kein gueltiger Bezirk -> kein DE-Muster
    assert r.region_code is None
    assert r.plate_type in ("unknown",)


def test_empty_input():
    r = PP.process("", 0.0)
    assert r.plate_type == "unknown"
    assert "empty_ocr" in r.warnings