from espmega.espmega_r3 import ESPMega_standalone as ESPMega
from time import sleep, perf_counter
from time import sleep as delay

class access_control:
    """
    This class provides methods to control access to a door using an ESPMega board.
    """

    def __init__(self):
        """
        Initializes an instance of the access_control class.
        """
        self.plc = ESPMega("/facescan","192.168.0.239",1883)

    def get_scan_state(self) -> bool:
        """
        Returns the state of the scan sensor.

        Returns:
        bool: True if the scan sensor is active, False otherwise.
        """
        return self.plc.digital_read(1)

    def lock_door(self):
        """
        Locks the door if it is closed.
        """
        if(self.plc.digital_read(0)):
            self.plc.digital_write(0,0)

    def unlock_door(self):
        """
        Unlocks the door if it is closed.
        """
        if(self.plc.digital_read(0)):
            self.plc.digital_write(0,1)

    def get_door_state(self) -> bool:
        """
        Returns the state of the door.

        Returns:
        bool: True if the door is closed, False otherwise.
        """
        return self.plc.digital_read(0)

    # def activate_alarm(self):
    #     """
    #     Activates the alarm.
    #     """
    #     self.plc.digital_write(2,1)

    def activate_alarm(self):
        """
        Activates the LED alarm.
        """
        self.plc.digital_write(8,1)
        while(True):
            self.plc.digital_write(1,round((perf_counter()*2)%1))
            print(round((perf_counter()*2)%1))
            delay(0.3)
            if self.get_door_state():
                self.lock_door()
                self.plc.digital_write(1,0)
                self.plc.digital_write(8,0)
                break