from __future__ import annotations

import typing as t
from itertools import chain

from rene import hints


def polygon_to_segments(polygon: hints.Polygon[hints.Scalar],
                        bounding_box: hints.Box[hints.Scalar],
                        /) -> t.Iterable[hints.Segment[hints.Scalar]]:
    return chain(
            polygon.border.segments,
            chain.from_iterable(
                    hole.segments
                    for hole in polygon.holes
                    if not hole.bounding_box.disjoint_with(bounding_box)
            )
    )