import pytest

from app.fitness.body_composition import (
    compute_body_composition,
    ffmi,
    lean_body_mass,
    navy_body_fat_pct,
    whr,
)


def test_navy_male_reasonable_range():
    bf = navy_body_fat_pct(
        sex="male",
        height_cm=180,
        neck_cm=38,
        waist_cm=84,
    )
    assert bf is not None
    assert 5 <= bf <= 35


def test_navy_female_requires_hip():
    assert navy_body_fat_pct(
        sex="female",
        height_cm=165,
        neck_cm=34,
        waist_cm=72,
        hip_cm=None,
    ) is None

    bf = navy_body_fat_pct(
        sex="female",
        height_cm=165,
        neck_cm=34,
        waist_cm=72,
        hip_cm=98,
    )
    assert bf is not None
    assert 10 <= bf <= 45


def test_navy_invalid_waist_neck():
    assert navy_body_fat_pct(
        sex="male",
        height_cm=180,
        neck_cm=40,
        waist_cm=39,
    ) is None


def test_whr():
    assert whr(80, 100) == 0.8


def test_lean_body_mass_and_ffmi():
    lbm = lean_body_mass(80, 20)
    assert lbm == 64.0
    score = ffmi(80, 180, 20)
    assert score is not None
    assert 15 <= score <= 25


def test_compute_manual_body_fat():
    result = compute_body_composition(
        sex="male",
        height_cm=180,
        weight_kg=80,
        body_fat_pct=18,
        waist_cm=84,
        hip_cm=100,
    )
    assert result["body_fat_pct"] == 18.0
    assert result["body_fat_method"] == "manual"
    assert result["whr"] == 0.84
    assert result["lbm_kg"] == 65.6
    assert result["ffmi"] is not None


def test_compute_navy_auto():
    result = compute_body_composition(
        sex="male",
        height_cm=180,
        weight_kg=82,
        neck_cm=38,
        waist_cm=84,
    )
    assert result["body_fat_pct"] is not None
    assert result["body_fat_method"] == "navy"
    assert result["lbm_kg"] is not None


def test_compute_female_warning_without_hip():
    result = compute_body_composition(
        sex="female",
        height_cm=165,
        weight_kg=60,
        neck_cm=34,
        waist_cm=72,
    )
    assert result["body_fat_pct"] is None
    assert any("бёдер" in w for w in result["warnings"])