#!/bin/python3

from contextlib import contextmanager
import colorama

import time
import datetime
import dateutil.tz


@contextmanager
def init_colorama():
    """Set global foreground modifying ANSI codes.

    BLACK, BLUE, CYAN, GREEN, MAGENTA, RED, WHITE, YELLOW, and RESET.

    """

    # pylint: disable=exec-used,invalid-name

    colorama.init()
    for color, ansi in colorama.Fore.__dict__.items():
        exec("global {0}; {0} = '{1}'".format(color, ansi))
    yield
    for color in colorama.Fore.__dict__:
        exec("global {0}; {0} = ''".format(color))
    colorama.deinit()


def current_datetime():
    """Return the current datetime, complete with tzinfo.

    Precision is one second. Timezone is the local timezone.
    """
    return datetime.datetime.fromtimestamp(round(time.time()),
                                           dateutil.tz.tzlocal())