# Copyright 2009 Brian Quinlan. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.

"""Execute computations asynchronously using threads or processes."""

__author__ = 'Brian Quinlan (brian@sweetapp.com)'

from futures3._base import (FIRST_COMPLETED,
                            FIRST_EXCEPTION,
                            ALL_COMPLETED,
                            CancelledError,
                            TimeoutError,
                            InvalidStateError,
                            BrokenExecutor,
                            Future,
                            Executor,
                            wait,
                            as_completed)

__all__ = (
    'FIRST_COMPLETED',
    'FIRST_EXCEPTION',
    'ALL_COMPLETED',
    'CancelledError',
    'TimeoutError',
    'BrokenExecutor',
    'Future',
    'Executor',
    'wait',
    'as_completed',
    'ProcessPoolExecutor',
    'ThreadPoolExecutor',
)


def __dir__():
    return __all__ + ('__author__', '__doc__')


def __getattr__(name):
    global ProcessPoolExecutor, ThreadPoolExecutor

    if name == 'ProcessPoolExecutor':
        from .process import ProcessPoolExecutor as pe
        ProcessPoolExecutor = pe
        return pe

    if name == 'ThreadPoolExecutor':
        from .thread import ThreadPoolExecutor as te
        ThreadPoolExecutor = te
        return te

    raise AttributeError(f"module {__name__} has no attribute {name}")
