import os
import msvcrt
import win_unicode_console
from .. import const


def init_output():
    import colorama
    win_unicode_console.enable()
    colorama.init()


def get_key():
    ch = msvcrt.getwch()
    if ch in ('\x00', '\xe0'):  # arrow or function key prefix?
        ch = msvcrt.getwch()  # second call returns the actual key code

    if ch in const.KEY_MAPPING:
        return const.KEY_MAPPING[ch]
    if ch == 'H':
        return const.KEY_UP
    if ch == 'P':
        return const.KEY_DOWN

    return ch


def open_command(arg):
    return 'cmd /c start ' + arg


try:
    from pathlib import Path
except ImportError:
    from pathlib2 import Path


def _expanduser(self):
    return self.__class__(os.path.expanduser(str(self)))


# pathlib's expanduser fails on windows, see http://bugs.python.org/issue19776
Path.expanduser = _expanduser