#!/usr/bin/python3
import time, socket, os, stat
from datetime import datetime
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BOARD)

def log (what):
	print (datetime.now(),what)

def waynesend (conn, what):
	try:
		conn.send(what)
	except:
		log("Couldn't send %s" % str(what))

class Pinoutput:
	# actionsanddelays is a list of pairs: (bool to send, delay in seconds to wait afterwards)
	def __init__ (self, name, pinnumber, actionsanddelays):
		self.name = name
		self.pin = pinnumber
		self.todo = actionsanddelays
		GPIO.setup(pinnumber, GPIO.OUT)
		log ("Pin %d set to be an output pin for %s." % (pinnumber,name))
	
	def __call__ (self, conn):
		for (value,delay) in self.todo:
			GPIO.output(self.pin, value)
			log ("%s: Pin %d set to %s." % (self.name,self.pin,str(value)))
			time.sleep(delay)
		waynesend(conn,b"1")

tuergroupid = 1005

pinlist = [Pinoutput("open", 12, [(True, 0.3), (False, 5.0)]),
	Pinoutput("close", 16, [(True, 0.3), (False, 5.0)]),
	Pinoutput("buzz", 22, [(True, 2.0), (False, 5.0)])]

socketname = "/run/tuer.sock"


def doNothing (conn):
	log ("doing nothing")
	waynesend(conn,b"0")
	pass

sock = socket.socket (socket.AF_UNIX, socket.SOCK_STREAM)

try:
	os.unlink (socketname)
except OSError:
	pass

sock.bind (socketname)

os.chown (socketname, 0, tuergroupid)
os.chmod (socketname, stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IWGRP)

sock.listen(1)

pindict = {}
for pin in pinlist:
	pindict[pin.name.encode()] = pin

while True:
	conn, addr = sock.accept()
	data = conn.recv (128)
	log("received command: %s" % str(data))
	pindict.get(data,doNothing)(conn)
	conn.close()

GPIO.cleanup()