# Copyright CNRS/Inria/UCA
# Contributor(s): Eric Debreuve (since 2021)
#
# eric.debreuve@cnrs.fr
#
# This software is governed by the CeCILL  license under French law and
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import numpy as nmpy

array_t = nmpy.ndarray


def PseudoJaccard(
    labeled_map_1: array_t, labeled_map_2: array_t, idx_1: int, idx_2: int, /
) -> float:
    """"""
    map_1 = labeled_map_1 == idx_1
    map_2 = labeled_map_2 == idx_2

    intersection = nmpy.logical_and(map_1, map_2)
    intersection_area = nmpy.count_nonzero(intersection)

    t_p_1_area = nmpy.count_nonzero(map_2)

    return intersection_area / t_p_1_area
