import kivy
kivy.require('1.9.0')

from kivy.app import App
from kivy.clock import Clock
from kivy.uix.gridlayout import GridLayout
from kivy.uix.button import Button
from random import random
from random import randint

offen  = 0


class MemoryKnopf (Button):

   def __init__ (self, farbe, *args):
       self.farbe = farbe
       self.rueckenFarbe = (0.3, 0.3, 0.3, 1)
       Button. __init__ (self, text = '', background_color = self.rueckenFarbe)

   def aufdecken (self, obj):
       global offen
       global partner
       global paare

       if offen < 2:
          self.background_color = self.farbe
	  offen += 1

	  if offen == 1:
	      partner = self
          else:
              if self.farbe == partner.farbe:
	          Clock.schedule_once (self.wegnehmen, 2)
		  Clock.schedule_once (partner.wegnehmen, 2)

                  offen -= 2
		  paare -= 1

		  if paare == 0:
		      Clock.schedule_once (App.get_running_app().stop, 5)
              else:
	          Clock.schedule_once (self.zudecken, 2)

   def zudecken (self, obj):
       global anzahl
       global offen

       self.background_color = self.rueckenFarbe
       offen -= 1

       if offen == 1:
           partner.zudecken (self)

   def wegnehmen (self, obj):
       self.background_color = (0, 0, 0, 1)
       self.disabled = True


class MemoryApp (App):

    def build(self):
        global paare

        self.elter = GridLayout (cols = 4, padding = 5)

        self.rgbafarben = [(1, 1, 1, 1), (1, 1, 0, 1), (1, 0, 1, 1), (0, 1, 1, 1), (1, 0, 0, 1), (0, 1, 0, 1), (1, 0, 0, 1), (1, 0.7, 0.3, 1)];

	paare = len (self.rgbafarben)

	self.rgbafarben = self.rgbafarben + self.rgbafarben
	self.knoepfe = []

        for i in range (0, 2*paare):
            index = randint (0, len (self.rgbafarben) - 1)
	    knopf = MemoryKnopf (self.rgbafarben[index])
	    self.rgbafarben.remove (self.rgbafarben[index])
	    self.knoepfe.append (knopf)
	    self.elter.add_widget (knopf)
	    knopf.bind (on_release = knopf.aufdecken)

        return self.elter

if __name__ == '__main__':
    MemoryApp().run()