"""Tests for the cutting-stock nesting (lumber 1D, plywood 2D)."""
from woodshop.layout import nest_lumber, nest_plywood, stock_counts
from woodshop.scene import Scene


def test_lumber_packs_into_sticks():
    s = Scene()
    for _ in range(3):
        s.place("2x4", 40)          # three 40" pieces -> two fit in a 96" stick (80+kerf)
    sticks = nest_lumber(s)["2x4"]
    assert len(sticks) == 2         # 2 in the first stick, 1 in the second
    assert sum(len(st["pieces"]) for st in sticks) == 3
    assert all(st["used"] <= 96 + 1e-6 for st in sticks)


def test_lumber_offcut_reported():
    s = Scene()
    s.place("2x4", 90)
    stick = nest_lumber(s)["2x4"][0]
    assert stick["offcut"] == 6.0   # 96 - 90


def test_plywood_packs_panels_on_sheet():
    s = Scene()
    s.place("ply-3/4", 40, width_in=20)   # two panels easily fit on one 48x96 sheet
    s.place("ply-3/4", 40, width_in=20)
    sheets = nest_plywood(s)["ply-3/4"]
    assert len(sheets) == 1
    assert len(sheets[0]["placements"]) == 2


def test_oversize_panel_gets_its_own_sheet():
    s = Scene()
    s.place("ply-3/4", 96, width_in=48)   # a full sheet
    s.place("ply-3/4", 96, width_in=48)   # another full sheet
    assert len(nest_plywood(s)["ply-3/4"]) == 2


def test_stock_counts_mixes_lumber_and_plywood():
    s = Scene()
    s.place("2x4", 40)
    s.place("ply-1/2", 24, width_in=24)
    counts = stock_counts(s)
    assert counts["2x4"] == 1
    assert counts["ply-1/2"] == 1