# Copyright (c) 2023 The Regents of the University of California
# All rights reserved.
#
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# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
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# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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class FakeTQDM:
    """This is a fake wrapper so that the tqdm calls work whether or not it
    has been installed.
    """

    def __call__(*args, **kwargs):
        if args:
            return args[0]
        return kwargs.get("iterable", None)

    def wrapattr(self, *args, **kwargs):
        if args:
            return args[0]
        return kwargs.get("iterable", None)

    def __enter__(self):
        pass

    def __exit__(self, exc_type, exc_val, exc_tb):
        pass


try:
    from tqdm.auto import tqdm

    _have_tqdm = True
except ImportError:
    tqdm = FakeTQDM()
    _have_tqdm = False

# Hook for the progress bar
def progress_hook(t):
    if not _have_tqdm:
        # Takes 3 arguments
        return lambda a, b, c: None

    last_b = [0]

    def update_to(b=1, bsize=1, tsize=None):
        if tsize not in (None, -1):
            t.total = tsize
        displayed = t.update((b - last_b[0]) * bsize)
        last_b[0] = b
        return displayed

    return update_to


__all__ = [tqdm, progress_hook, FakeTQDM]