"""거래량비 장중 시간 정규화 (하드닝 R3)."""
from datetime import datetime
from app.services import market_analyzer as ma

KST = ma.KST


def _now(h, m, d=(2026, 10, 8)):  # 목요일
    return KST.localize(datetime(d[0], d[1], d[2], h, m))


def test_intraday_partial_bar_is_normalized():
    vols = [1000] * 20 + [250]
    r = ma._volume_ratio_v2(vols, 250, "20261008", _now(10, 37))
    assert 0.95 < r < 1.05
    assert 250 / (sum(vols[-20:]) / 20) < 0.3  # 기존 방식은 구조적으로 낮았다


def test_today_bar_excluded_from_denominator():
    vols = [1000] * 20 + [10_000_000]
    r = ma._volume_ratio_v2(vols, 10_000_000, "20261008", _now(15, 29))
    assert r > 9000


def test_early_open_fraction_floor():
    vols = [1000] * 21
    r = ma._volume_ratio_v2(vols, 10, "20261008", _now(9, 1))
    assert r == 10 / (1000 * ma._VOL_MIN_ELAPSED_FRACTION)


def test_completed_or_past_bar_unchanged():
    vols = [1000] * 19 + [2000]
    legacy = 2000 / (sum(vols[-20:]) / 20)
    assert ma._volume_ratio_v2(vols, 2000, "20261008", _now(16, 0)) == legacy
    assert ma._volume_ratio_v2(vols, 2000, "20261007", _now(10, 0)) == legacy
    assert ma._volume_ratio_v2(vols, 2000, "20261010", _now(10, 0, (2026, 10, 10))) == legacy


def test_insufficient_history():
    assert ma._volume_ratio_v2([1000] * 10, 5, "20261008", _now(10, 0)) == 0