"""Tests for the cut list / board-feet / shopping estimate."""
import pytest

from woodshop.cutlist import board_feet, cut_rows, nominal_dims, shopping
from woodshop.scene import Scene


def test_nominal_dims():
    assert nominal_dims("2x4") == (2.0, 4.0)
    assert nominal_dims("4x4") == (4.0, 4.0)


def test_board_feet_uses_nominal():
    # 2x4 at 96in = (2*4*96)/144 = 5.333 bd-ft
    assert board_feet("2x4", 96) == pytest.approx(5.3333, abs=1e-3)


def test_cut_rows_groups_and_counts():
    s = Scene()
    s.place("2x4", 48)
    s.place("2x4", 48)
    s.place("2x4", 29)
    rows = cut_rows(s)
    by_len = {r["length_in"]: r for r in rows}
    assert by_len[48.0]["count"] == 2
    assert by_len[29.0]["count"] == 1
    assert by_len[48.0]["board_feet"] == pytest.approx(board_feet("2x4", 48) * 2)


def test_shopping_rounds_up_with_waste():
    s = Scene()
    s.place("2x4", 48)
    s.place("2x4", 48)   # 96in total -> with 10% waste = 105.6 -> 2 sticks of 96in
    assert shopping(s) == {"2x4": 2}


def test_empty_shopping():
    assert shopping(Scene()) == {}