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# Copyright (c) 2023- CNRS
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from typing import Any, Callable, Tuple, Union

from pyannote_audio_utils.audio.core.task import Specifications


def map_with_specifications(
    specifications: Union[Specifications, Tuple[Specifications]],
    func: Callable,
    *iterables,
) -> Union[Any, Tuple[Any]]:
    """Compute the function using arguments from each of the iterables

    Returns a tuple if provided `specifications` is a tuple,
    otherwise returns the function return value.

    Parameters
    ----------
    specifications : (tuple of) Specifications
        Specifications or tuple of specifications
    func : callable
        Function called for each specification with
        `func(*iterables[i], specifications=specifications[i])`
    *iterables :
        List of iterables with same length as `specifications`.

    Returns
    -------
    output : (tuple of) `func` return value(s)
    """
    
    if isinstance(specifications, Specifications):
        return func(*iterables, specifications=specifications)

    return tuple(
        func(*i, specifications=s) for s, *i in zip(specifications, *iterables)
    )