#!/usr/bin/env python2

import os
import stat
import time
import pifacedigitalio
import urllib2
import signal
import sys
import grp
from ConfigParser import SafeConfigParser

#Read config
parser = SafeConfigParser()
parser.read('/etc/foodoord.conf')

url = parser.get('door_firstlevel', 'status_url')
old_api = parser.get('door_firstlevel_old', 'status_url')


#Definitions for output
LED_RED=6
LED_GREEN=7
RELAYS_LOCK=0
RELAYS_UNLOCK=1

#Definitions for input
DOOR_BELL=0
REED_RELAYS=1 #not implementet yet 

#Definitions for LEDcolor
RED=1
GREEN=2
ORANGE=3

if __name__ == "__main__":

	

	def doorbell(event):
		if (STATUS):
			pifacedigital.relays[RELAYS_UNLOCK].toggle()
			time.sleep(2)
			pifacedigital.relays[RELAYS_UNLOCK].toggle()
			#print 'got doorbell'

	def close_button(event):
		global STATUS 
		STATUS = False
		try:
			urllib2.urlopen(url+'&door=aerie&locked=1', timeout=2)
			urllib2.urlopen(old_api+'&status=closed', timeout=2)
		except:
			pass

		set_led(RED)


	listener = pifacedigitalio.InputEventListener()
	listener.register(0, pifacedigitalio.IODIR_RISING_EDGE, doorbell, settle_time=10)
	listener.register(1, pifacedigitalio.IODIR_RISING_EDGE, close_button, settle_time=5)
	listener.activate()

	def signal_handler(signal, frame):
		listener.deactivate()
		os.remove("/var/run/foodoord.pipe")

		try:
			urllib2.urlopen(url+'&door=aerie&locked=1', timeout=2)
			urllib2.urlopen(old_api+'&status=closed', timeout=2)
		except:
			pass
				
		set_led(RED)
		sys.exit(0)

	def set_led(color):
		if (color==RED):
			pifacedigital.leds[LED_RED].turn_on()
			pifacedigital.leds[LED_GREEN].turn_off()

		elif (color==GREEN):
			pifacedigital.leds[LED_GREEN].turn_on()
			pifacedigital.leds[LED_RED].turn_off()

		elif (color==ORANGE):
			pifacedigital.leds[LED_RED].turn_on()
			pifacedigital.leds[LED_GREEN].turn_on()

	pifacedigital = pifacedigitalio.PiFaceDigital()
	signal.signal(signal.SIGTERM, signal_handler)

	#Startsettings 
	STATUS = False
	pifacedigital.leds[LED_RED].turn_on()

	#Setting up FiFo to get sshd-output
	try:
		os.mkfifo("/var/run/foodoord.pipe")
		os.chown("/var/run/foodoord.pipe", -1, grp.getgrnam('foodoor')[2])
		os.chmod("/var/run/foodoord.pipe", stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IWGRP)
	except OSError:
		pass

	with open("/var/run/foodoord.pipe", "r") as ssh_input:
		while 1:
			#Read sshd-output from pipe 
			Pipe = ssh_input.readline()[:-1]
		
			if (Pipe == "close" and STATUS):
				pifacedigital.relays[RELAYS_LOCK].toggle()
				time.sleep(1)
				pifacedigital.relays[RELAYS_LOCK].toggle()
				STATUS = False

				try:
					urllib2.urlopen(url+'&door=aerie&locked=1', timeout=2)
					urllib2.urlopen(old_api+'&status=closed', timeout=2)
				except:
					pass
				
				set_led(RED)

			elif (Pipe == "open"):
				pifacedigital.relays[RELAYS_UNLOCK].toggle()
				time.sleep(2)
				pifacedigital.relays[RELAYS_UNLOCK].toggle()

				if (STATUS==False):
					
					try:
						urllib2.urlopen(url+'&door=aerie&locked=0', timeout=2)
						urllib2.urlopen(old_api+'&status=open', timeout=2)
					except:
						pass

				STATUS = True
				
				set_led(GREEN)
			time.sleep(0.1)