# ========================================================================== #
#                                                                            #
#    KVMD - The The main Pi-KVM daemon.                                      #
#                                                                            #
#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
#                                                                            #
#    This program is free software: you can redistribute it and/or modify    #
#    it under the terms of the GNU General Public License as published by    #
#    the Free Software Foundation, either version 3 of the License, or       #
#    (at your option) any later version.                                     #
#                                                                            #
#    This program is distributed in the hope that it will be useful,         #
#    but WITHOUT ANY WARRANTY; without even the implied warranty of          #
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           #
#    GNU General Public License for more details.                            #
#                                                                            #
#    You should have received a copy of the GNU General Public License       #
#    along with this program.  If not, see <https://www.gnu.org/licenses/>.  #
#                                                                            #
# ========================================================================== #


import contextlib

from typing import Generator

from RPi import GPIO

from .logging import get_logger


# =====
@contextlib.contextmanager
def bcm() -> Generator[None, None, None]:
    logger = get_logger(2)
    GPIO.setmode(GPIO.BCM)
    logger.info("Configured GPIO mode as BCM")
    try:
        yield
    finally:
        GPIO.cleanup()
        logger.info("GPIO cleaned")


def set_output(pin: int, initial: bool=False) -> int:
    GPIO.setup(pin, GPIO.OUT, initial=initial)
    return pin


def set_input(pin: int) -> int:
    GPIO.setup(pin, GPIO.IN)
    return pin


def read(pin: int) -> bool:
    return bool(GPIO.input(pin))


def write(pin: int, flag: bool) -> None:
    GPIO.output(pin, flag)