"""`temperature_extraction.extract_temperatures` — regex pure, sans modèle
ni entraînement (voir le module)."""

from intent_service.temperature_extraction import extract_temperatures


def test_no_temperature_returns_empty_list():
    assert extract_temperatures("Émincer les oignons finement", "fr") == []
    assert extract_temperatures("   ", "fr") == []


def test_celsius_with_degree_sign_and_c():
    [temp] = extract_temperatures("Cuire à 180°C pendant 30 min", "fr")
    assert temp.celsius == 180.0
    assert temp.gas_mark is None
    assert temp.qualitative is None
    assert temp.raw == "180°C"
    assert (temp.start, temp.end) == (8, 13)


def test_celsius_spelled_out_degrees():
    [temp] = extract_temperatures("Préchauffer le four à 200 degrés", "fr")
    assert temp.celsius == 200.0
    assert temp.raw == "200 degrés"


def test_bare_degree_sign_reads_as_celsius():
    [temp] = extract_temperatures("Monter le four à 240°", "fr")
    assert temp.celsius == 240.0


def test_fahrenheit_is_converted_and_rounded():
    [temp] = extract_temperatures("Bake at 350°F", "en")
    assert temp.celsius == 177.0  # round((350 - 32) * 5 / 9)
    assert temp.raw == "350°F"


def test_thermostat_and_gas_mark():
    [fr] = extract_temperatures("Enfourner à thermostat 6", "fr")
    assert fr.gas_mark == 6
    assert fr.celsius is None

    [short] = extract_temperatures("Cuisson à th. 7", "fr")
    assert short.gas_mark == 7

    [en] = extract_temperatures("Cook at gas mark 4", "en")
    assert en.gas_mark == 4


def test_qualitative_heat_fr():
    levels = {
        extract_temperatures(f"Faire revenir à feu {word}", "fr")[0].qualitative
        for word in ("doux", "moyen", "vif", "fort")
    }
    assert levels == {"low", "medium", "high"}

    [temp] = extract_temperatures("Laisser mijoter à feu doux", "fr")
    assert temp.qualitative == "low"
    assert temp.celsius is None and temp.gas_mark is None
    assert temp.raw == "feu doux"


def test_qualitative_heat_en():
    [temp] = extract_temperatures("Sear over high heat", "en")
    assert temp.qualitative == "high"
    assert temp.raw == "high heat"


def test_multiple_temperatures_in_order_without_overlap():
    temps = extract_temperatures("Saisir à feu vif puis enfourner à 180°C, finir à th. 4", "fr")
    assert [(t.qualitative, t.celsius, t.gas_mark) for t in temps] == [
        ("high", None, None),
        (None, 180.0, None),
        (None, None, 4),
    ]
    assert [t.start for t in temps] == sorted(t.start for t in temps)


def test_fahrenheit_not_double_counted_as_celsius():
    temps = extract_temperatures("Bake at 400°F", "en")
    assert len(temps) == 1
    assert temps[0].celsius == 204.0