"""
Dummy module that contains empty functions and variables that exist in RPi.GPIO. This module is to be imported
if importing RPi.GPIO fails.
"""

# Constants used by RPi.GPIO
BOARD = 0
IN = 0
FALLING = 0


def setmode(new_mode):
    """
    Fake setmode function.
    Args:
        new_mode:

    Returns:

    """
    pass


def setup(channel, mode, initial=None, pull_up_down=None):
    """
    Fake setup function.
    Args:
        channel:
        mode:
        initial:
        pull_up_down:

    Returns:

    """
    pass


def add_event_detect(channel, edge_type, callback=None, bouncetime=0):
    """
    Fake function to add a non-existent event detect.
    Args:
        channel:
        edge_type:
        callback:
        bouncetime:

    Returns:

    """
    pass


def event_detected(channel):
    """
    Fake function to detect an event. Always returns false.
    Args:
        channel:

    Returns:

    """
    return False


def cleanup(channel=None):
    """
    Fake cleanup function.
    Args:
        channel:

    Returns:

    """
    pass