import time
import Adafruit_BBIO.GPIO as GPIO
import Adafruit_BBIO.PWM as PWM

class alarm:
    _alarm_duration = 60 # in second
    _alarm_pwm_perc = 50 # in percentage
    _alarm_pwm_freq = 10000 # in hz
    _alarm_led_freq = 2 # in hz
    _config = {}
    _pins_to_watch = {} # { pname: pin }
    _window_closed = True

    def __init__(self, config):
        self._config = config

        for pname,pconfig in self._config.items():
            if "mode" in pconfig:
                GPIO.setup(pconfig["pin"], pconfig["mode"])
            if "event_to_detect" in pconfig:
                GPIO.add_event_detect(pconfig["pin"], pconfig["event_to_detect"])
                self._pins_to_watch[pname] = pconfig["pin"]

    def trigger_alarm(self, pled, ppwm):
        for i in range(0, self._alarm_duration):
            PWM.start(self._config[ppwm]["pin"], self._alarm_pwm_perc, self._alarm_pwm_freq)
            GPIO.output(self._config[pled]["pin"],GPIO.HIGH)
            time.sleep(1/self._alarm_led_freq)
            GPIO.output(self._config[pled]["pin"],GPIO.LOW)
            time.sleep(1/self._alarm_led_freq)
            PWM.stop(self._config[ppwm]["pin"])
            GPIO.output(self._config[pled]["pin"],GPIO.HIGH)
            time.sleep(1/self._alarm_led_freq)
            GPIO.output(self._config[pled]["pin"],GPIO.LOW)
            time.sleep(1/self._alarm_led_freq)

if __name__ == "__main__":
    my_config = {
    "inPinIR": {"pin": "P9_12", "mode": GPIO.IN, "event_to_detect": GPIO.RISING},
    "inPinPIR": {"pin": "P9_41", "mode": GPIO.IN, "event_to_detect": GPIO.RISING},
    "inPinMAG": {"pin": "P8_7", "mode": GPIO.IN,  "event_to_detect": GPIO.BOTH},
    "outPinROT": {"pin": "P9_27", "mode": GPIO.OUT},
    "myPWMLAUT": {"pin":"P8_13"}
    }
    try:
        print("Program start. Initializing with alarm config...")
        my_alarm = alarm(config=my_config)
        print("Pins to watch:")
        print(my_alarm._pins_to_watch)
        print("Initialization succeeded. Start in 2 seconds.")
        time.sleep(2)
        while True:
            for pname,pin in my_alarm._pins_to_watch.items():
                if GPIO.event_detected(pin):
                    print("Motion detected from {}".format(pname))
                    if pname == "inPinMAG": # Fenster
                        if my_alarm._window_closed:
                            print("Fenster geoeffnet...")
                            my_alarm._window_closed = False
                            my_alarm.trigger_alarm(pled="outPinROT", ppwm="myPWMLAUT")
                        else: # open
                            print("Fenster zu...")
                            my_alarm._window_closed = True
                        continue
                    if pname == "inPinIR":
                        my_alarm.trigger_alarm(pled="outPinROT", ppwm="myPWMLAUT")
                        continue
                    if pname == "inPinPIR":
                        my_alarm.trigger_alarm(pled="outPinROT", ppwm="myPWMLAUT")
                        continue
            print("...")
            time.sleep(2)
    except Exception as e:
        print("Exception captured. Clean up and quit...")
        GPIO.cleanup()
        PWM.cleanup()
        print(e)