class Homepage(Screen):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.t = None # used to hold thread

    def on_enter(self,*args):

        if self.t:  # only allow 1 thread to be created
            return
        self.t =threading.Thread(target=self.fetch_data)
        self.t.start()
        self.set_animation()
        self.fetch_data()

    def show_products22(self, * args):
        try:
            # getting data from real-time database
            self.firebase = firebase.FirebaseApplication('https://lexconnectionsapp-default-rtdb.firebaseio.com/', None)
            print('connecting........')

            self.result = self.firebase.get('lexconnectionsapp-default-rtdb/products', None)
            print(type(self.result))
            # data i fetched from my database
            self.data = self.result
            products = [item for item in self.data.values()]  # ignore primary key, get the inner dicts
            for product in products:
                sc = ShowCard(**product)  # same as Showcard(description=product['description'],...)
                self.ids.show_card.add_widget(sc)

        except Exception as e:
            print(f'Error: {e}')
    @mainthread
    def fetch_data(self):
            #time.sleep(.5)  # to make the threaded task slow, note kivy still responds
        self.show_products22()


    def on_leave(self):
        print('closed')