from app.services import level_service


def test_level_from_xp_zero_is_level_one():
    info = level_service.level_from_xp(0)
    assert info.level == 1
    assert info.xp_into_level == 0
    assert info.xp_for_next_level == 20
    assert info.progress_pct == 0.0


def test_level_from_xp_just_below_threshold_stays_at_level():
    info = level_service.level_from_xp(19)
    assert info.level == 1
    assert info.xp_into_level == 19
    assert info.progress_pct == 95.0


def test_level_from_xp_at_threshold_advances_level():
    info = level_service.level_from_xp(20)
    assert info.level == 2
    assert info.xp_into_level == 0
    assert info.xp_for_next_level == 30  # 레벨2->3 요구치는 레벨1->2보다 커진다(점점 완만해짐)


def test_level_from_xp_requirement_grows_with_level():
    # Lv1->2: 20xp, Lv2->3: 30xp, Lv3->4: 40xp (누적 90xp에서 Lv4 도달)
    info = level_service.level_from_xp(90)
    assert info.level == 4
    assert info.xp_into_level == 0


def test_level_from_xp_negative_floors_to_zero():
    info = level_service.level_from_xp(-50)
    assert info.level == 1
    assert info.xp == 0