import sys
from pathlib import Path

sys.path.insert(0, str(Path(__file__).resolve().parent.parent / "tools" / "voxel-model-eval"))
import core


def test_extract_json_plain():
    assert core.extract_json('{"name":"a","boxes":[]}') == {"name": "a", "boxes": []}


def test_extract_json_with_trailing_prose():
    assert core.extract_json('{"name":"a","boxes":[]} done') == {"name": "a", "boxes": []}


def test_extract_json_malformed_returns_none():
    assert core.extract_json("not json at all") is None


def test_voxelize_centering_and_count():
    # a 2x1x1 box centered at origin -> two cells straddling x=0
    cells = core.voxelize([{"x": 0, "y": 0, "z": 0, "w": 2, "h": 1, "d": 1, "color": "#fff"}])
    assert set(cells.keys()) == {(0, 0, 0), (1, 0, 0)}


def test_voxelize_dedupe_last_writer_wins():
    boxes = [
        {"x": 0, "y": 0, "z": 0, "w": 1, "h": 1, "d": 1, "color": "#111"},
        {"x": 0, "y": 0, "z": 0, "w": 1, "h": 1, "d": 1, "color": "#222"},
    ]
    cells = core.voxelize(boxes)
    assert len(cells) == 1 and cells[(0, 0, 0)] == "#222"


def test_metrics_grounded_and_symmetry():
    # symmetric pair on the ground
    obj = {"boxes": [
        {"x": -1, "y": 0, "z": 0, "w": 1, "h": 1, "d": 1, "color": "#fff"},
        {"x": 1, "y": 0, "z": 0, "w": 1, "h": 1, "d": 1, "color": "#fff"},
    ]}
    m = core.metrics(obj)
    assert m["grounded"] is True
    assert m["symmetry"] == 1.0
    assert m["in_bounds_pct"] == 100


def test_metrics_empty():
    m = core.metrics({"boxes": []})
    assert m["boxes"] == 0 and m["grounded"] is False