import RPi.GPIO as gpio
import time
import threading


class FeApPinConfiguration(object):
	def __init__(self):
		self.numbering = gpio.BOARD
		self.pin_nsa = 11
		self.pin_nsi = 13
		self.pin_gabelschalter = 15
		self.pin_schauzeichen = 12
		self.pin_wecker_enable = 16
		self.pin_wecker_a = 18
		self.pin_wecker_b = 19

class FeApUserInterface(object):
	def __init__(self, pinconfig):
		self.__pinconfig = pinconfig

		gpio.setmode(self.__pinconfig.numbering)
		gpio.setup(self.__pinconfig.pin_nsa, gpio.IN, gpio.PUD_UP)
		gpio.setup(self.__pinconfig.pin_nsi, gpio.IN, gpio.PUD_UP)
		gpio.setup(self.__pinconfig.pin_gabelschalter, gpio.IN, gpio.PUD_UP)
		gpio.setup(self.__pinconfig.pin_schauzeichen, gpio.OUT)
		gpio.setup(self.__pinconfig.pin_wecker_enable, gpio.OUT)
		gpio.setup(self.__pinconfig.pin_wecker_a, gpio.OUT)
		gpio.setup(self.__pinconfig.pin_wecker_b, gpio.OUT)
	
		gpio.add_event_detect(self.__pinconfig.pin_nsa, gpio.BOTH, 
		                      self.__on_nsa_change, 20)
		gpio.add_event_detect(self.__pinconfig.pin_nsi, gpio.FALLING, 
		                      self.__on_nsi_falling, 20)
		gpio.add_event_detect(self.__pinconfig.pin_gabelschalter, gpio.BOTH, 
		                      self.__on_gabelschalter_change, 20)
		#self.__nsa_up_time = 0
		self.__nsi_cnt = 0
		self.__weckt = False

		self.__nummernschalter_callbacks = []
		self.__gabelschalter_callbacks = []

	def __on_nsa_change(self, pin):
		nsastate = gpio.input(self.__pinconfig.pin_nsa)
		if nsastate == 0:
			#self.__nsa_up_time = time.time()
			self.__nsi_cnt = 0
		else:
			for cb in self.__nummernschalter_callbacks:
				cb(self.__nsi_cnt % 10)

	def __on_nsi_falling(self, pin):
		#print 'nsi'
		self.__nsi_cnt += 1
	
	def __on_gabelschalter_change(self, pin):
		gbstate = gpio.input(self.__pinconfig.pin_gabelschalter)
		print 'gabelschalter:', gbstate
		for cb in self.__gabelschalter_callbacks:
			cb(gbstate)
	
	def __wecker_thread(self):
		while self.__weckt:
			c = 0
			gpio.output(self.__pinconfig.pin_wecker_enable, 1)
			while c < 1000:
				gpio.output(self.__pinconfig.pin_wecker_a, 1)
				gpio.output(self.__pinconfig.pin_wecker_b, 0)
				time.sleep(0.02)
				gpio.output(self.__pinconfig.pin_wecker_a, 0)
				gpio.output(self.__pinconfig.pin_wecker_b, 1)
				time.sleep(0.02)
				c += 40
				print 'ring'
			gpio.output(self.__pinconfig.pin_wecker_enable, 0)

			print ''
			time.sleep(4)


	def add_gabelschalter_callback(self, cb):
		self.__gabelschalter_callbacks.append(cb)

	def add_nummernschalter_callback(self, cb):
		self.__nummernschalter_callbacks.append(cb)

	def set_wecker(self, enabled):
		if enabled and not self.__weckt:
			self.__weckt = True
			t = threading.Thread(target=self.__wecker_thread)
			t.start()
		elif not enabled:
			self.__weckt = False

	def set_schauzeichen(self, enabled):
		gpio.output(self.__pinconfig.pin_schauzeichen, 1 if enabled else 0)

if __name__ == '__main__':
	gpio.setmode(gpio.BOARD)
	pinconfig = FeApPinConfiguration()
	t = FeApUserInterface(pinconfig)

	def dailed(num):
		print num
	
	t.add_nummernschalter_callback(dailed)

	t.set_schauzeichen(True)
	time.sleep(0.5)
	t.set_schauzeichen(False)
	time.sleep(0.5)
	t.set_schauzeichen(True)
	time.sleep(0.5)
	t.set_schauzeichen(False)
	time.sleep(0.5)
	t.set_schauzeichen(True)
	time.sleep(0.5)
	t.set_schauzeichen(False)
	time.sleep(0.5)
	t.set_schauzeichen(True)
	time.sleep(0.5)
	t.set_schauzeichen(False)
	time.sleep(0.5)

	t.set_wecker(True)
	time.sleep(20)
	t.set_wecker(False)
	while True:
		time.sleep(1)