import contextlib
import sys
import os
import platform


def term():
    """Get the Terminal reference to make output pretty

    Returns:
        (blessings.Terminal): Returns
        a `blessings <https://blessings.readthedocs.io/en/latest>`_ terminal
        instance. If running in windows and not cygwin it will return an
        `intercessions <https://pypi.org/project/intercessions>`_ terminal
        instance instead
    """
    if not hasattr(term, '_handle'):
        if sys.platform != "cygwin" and platform.system() == 'Windows':
            from intercessions import Terminal

        else:
            from blessings import Terminal

        term._handle = Terminal()

    return term._handle


@contextlib.contextmanager
def pushd(newDir):
    previousDir = os.getcwd()
    os.chdir(newDir)
    try:
        yield

    finally:
        os.chdir(previousDir)