from app.business.travel_calc import (
    compute_km_for_entry,
    compute_co2_grams,
    compute_frais_reels,
)

VEHICLES = {
    "voiture": {"co2_per_km": 142, "cv": 5},
    "velo": {"co2_per_km": 0},
}

JOURNEYS = {
    "voiture_seule": {"distances": {"voiture": 25}},
    "voiture_velo": {"distances": {"voiture": 14, "velo": 8}},
    "velo_seul": {"distances": {"velo": 24}},
}

TRANCHES_CV5 = [
    {"km_max": 3000, "taux": 0.548, "forfait": 0},
    {"km_max": 6000, "taux": 0.316, "forfait": 699},
    {"km_max": 0,    "taux": 0.364, "forfait": 0},
]


def test_compute_km_voiture_seule():
    assert compute_km_for_entry("voiture_seule", JOURNEYS) == {"voiture": 25}


def test_compute_km_voiture_velo():
    assert compute_km_for_entry("voiture_velo", JOURNEYS) == {"voiture": 14, "velo": 8}


def test_compute_km_no_journey():
    assert compute_km_for_entry(None, JOURNEYS) == {}


def test_compute_co2_voiture():
    assert compute_co2_grams({"voiture": 25}, VEHICLES) == 25 * 142


def test_compute_co2_velo():
    assert compute_co2_grams({"velo": 24}, VEHICLES) == 0


def test_frais_reels_tranche1():
    result = compute_frais_reels(2000, TRANCHES_CV5)
    assert abs(result - 1096.0) < 0.01


def test_frais_reels_tranche2():
    result = compute_frais_reels(4000, TRANCHES_CV5)
    assert abs(result - 1963.0) < 0.01


def test_frais_reels_tranche3():
    result = compute_frais_reels(7000, TRANCHES_CV5)
    assert abs(result - 2548.0) < 0.01