from api.services.docling.template import build, synthesize_part_box


def test_synthesize_part_box_uses_content_margins_and_band_y():
    part_band = {"label": "01.1", "y_start": 712.34, "y_end": 601.27}
    content_x_band = {"x_left": 54.04, "x_right": 521.96}

    assert synthesize_part_box(part_band, content_x_band) == {
        "l": 54.0,
        "t": 712.3,
        "r": 522.0,
        "b": 601.3,
        "coord_origin": "BOTTOMLEFT",
    }


def test_synthesize_part_box_returns_none_without_margin_contract():
    assert synthesize_part_box({"y_start": 700, "y_end": 650}, {}) is None
    assert synthesize_part_box({"y_start": 700}, {"x_left": 50, "x_right": 520}) is None


def test_build_carries_label_box_as_anchor_and_single_synthesized_part_box():
    structured = {
        "board": "aqa",
        "paper_code": "8463/1",
        "questions": [{
            "question": "01",
            "parts": [{
                "label": "01.1",
                "page": 2,
                "bbox": {"l": 40, "t": 720, "r": 70, "b": 705},
            }],
        }],
    }
    bands = {
        "pages": {
            "2": {
                "main": [{"question": "01", "y_start": 730, "y_end": 0, "is_start": True}],
                "part": [{"label": "01.1", "question": "01", "y_start": 720, "y_end": 610}],
            }
        }
    }
    furniture = {
        "n_pages": 2,
        "content_margins": {
            "content_x_band": {"x_left": 55, "x_right": 515},
            "per_page": {"2": {"top": 760, "bottom": 40, "left": 55, "right": 515}},
        },
        "items": [],
    }

    part = build(structured, bands, furniture)["pages"]["2"]["part_bands"][0]

    assert part["label_box"] == {"l": 40, "t": 720, "r": 70, "b": 705}
    assert part["box"] == {"l": 55, "t": 720, "r": 515, "b": 610, "coord_origin": "BOTTOMLEFT"}