import logging
logging.basicConfig(
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
    level=logging.INFO)

import os
import json
import sys
#import RPi.GPIO as GPIO
import serial
import time

RELAY_PIN = 17
RFID_EN_PIN = 27
CARDS_FILE = 'cardexport.json'

ser = None
recent = {}
cards = {}

def init():
    global ser

    #GPIO.setwarnings(False)
    #GPIO.setmode(GPIO.BCM)
    #GPIO.setup(RELAY_PIN, GPIO.OUT)
    #GPIO.output(RELAY_PIN, GPIO.LOW)
    #GPIO.setup(RFID_EN_PIN, GPIO.OUT)
    #GPIO.output(RFID_EN_PIN, GPIO.LOW)
    logging.info('GPIO initialized.')

    #ser = serial.Serial(port='/dev/ttyAMA0', baudrate=2400, timeout=0.1)
    logging.info('Serial initialized.')

    with open(CARDS_FILE, 'r') as f:
        cards = json.load(f)
    logging.info('Read in {} card numbers.'.format(str(len(cards))))



def loop():
    card = ser.readline()
    if not card:
        return

    card = card.strip()
    if len(card) != 10:
        return

    now = time.time()
    if card in recent:
        if now - recent[card] < 5.0:
            recent[card] = now
            return
    recent[card] = now

    logging.info('Read card # ' + card)
    handle_card_read(card)

if __name__ == '__main__':
    logging.info('Initializing...')
    init()

    logging.info('Running main loop...')
    try:
        while True:
            loop()
    except KeyboardInterrupt:
        logging.info('Exiting...')