# Copyright CNRS/Inria/UCA
# Contributor(s): Eric Debreuve (since 2021)
#
# eric.debreuve@cnrs.fr
#
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from typing import Optional, Sequence

import numpy as nmpy
import skimage.measure as msre

from cell_tracking_BC.type.segmentation import compartment_t
from cell_tracking_BC.type.sequence import sequence_h, sequence_t
from cell_tracking_BC.type.tracks.structured import tracks_t


array_t = nmpy.ndarray


def CellContours(
    sequence: sequence_h, with_segmentation: bool, /
) -> Optional[Sequence[Sequence[array_t]]]:
    """"""
    if (
        with_segmentation
        and isinstance(sequence, sequence_t)
        and (sequence.segmentations is not None)
    ):
        output = []
        for segmentation in sequence.segmentations.CompartmentsWithVersion(
            compartment_t.CELL
        ):
            output.append(msre.find_contours(segmentation, level=0.5))
    else:
        output = None

    return output


def CellTracks(sequence: sequence_h, with_track_labels: bool, /) -> Optional[tracks_t]:
    """"""
    with_track_labels = (
        with_track_labels
        and isinstance(sequence, sequence_t)
        and (sequence.tracks is not None)
    )
    if with_track_labels:
        output = sequence.tracks
    else:
        output = None

    return output
