#!/usr/bin/env python
# -*- coding: utf8 -*-

import RPi.GPIO as GPIO
import MFRC522
import signal
import time

import os

GPIO.setmode(GPIO.BOARD)

# BUZZER NOTIFICA
GPIO.setup(15, GPIO.OUT)

# PIN LED
GPIO.setup(16, GPIO.OUT) #LED ROSSO
GPIO.setup(18, GPIO.OUT) #LED VERDE


GPIO.setup(7, GPIO.IN)   # button pin setup

#INSERIMENTO 1, RIMOZIONE 0
mode_dispensa = 0
GPIO.output(16, False)
GPIO.output(18, True)

def my_callback(signal):
    global mode_dispensa
    if mode_dispensa==0:
        mode_dispensa=1
        GPIO.output(16, True)
        GPIO.output(18, False)
    else:
        mode_dispensa=0
        GPIO.output(16, False)
        GPIO.output(18, True)

GPIO.add_event_detect(7, GPIO.FALLING, callback=my_callback, bouncetime=300)

continue_reading = True

# Capture SIGINT for cleanup when the script is aborted
def end_read(signal,frame):
    global continue_reading
    print "Ctrl+C captured, ending read."
    continue_reading = False
    GPIO.cleanup()

# Hook the SIGINT
signal.signal(signal.SIGINT, end_read)

# Create an object of the class MFRC522
MIFAREReader = MFRC522.MFRC522()

# Welcome message
print "Welcome to the MFRC522 data read example"
print "Press Ctrl-C to stop."




# This loop keeps checking for chips. If one is near it will get the UID and authenticate
while continue_reading:

    # Scan for cards
    (status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)

    # Get the UID of the card
    (status,uid) = MIFAREReader.MFRC522_Anticoll()

    # If we have the UID, continue
    if status == MIFAREReader.MI_OK:

        # Print UID

        # This is the default key for authentication
        key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]

        # Select the scanned tag
        MIFAREReader.MFRC522_SelectTag(uid)

        # Authenticate
        status = MIFAREReader.MFRC522_Auth(MIFAREReader.PICC_AUTHENT1A, 8, key, uid)

        # Check if authenticated
        if status == MIFAREReader.MI_OK:

            #print "It now looks like this:"
            # Check to see if it was written
            backdata = MIFAREReader.MFRC522_Read(8)
            #print "\n"

            # Turn Buzzer on
            GPIO.output(15, True)

            # Wait 1 second
            time.sleep(0.3)

            # Turn Buzzer off
            GPIO.output(15, False)

            #print backdata

            contenuto_tag = ''.join(map(chr, filter(None, backdata)))

            os.system("php %s/../trigger_RFID.php %s %d"%(os.path.dirname(os.path.abspath(__file__)),contenuto_tag, mode_dispensa))



            MIFAREReader.MFRC522_StopCrypto1()

        else:
            print "Authentication error"