from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.label import Label
from kivy.uix.screenmanager import ScreenManager, Screen

from functools import partial


class Helper(Screen):
    def __init__(self, prompt, options):
        super().__init__()

        layout = BoxLayout(orientation='vertical')

        self.prompt = prompt
        layout.add_widget(Label(text=prompt))

        choices = BoxLayout(orientation='horizontal')

        for option in options:
            button = Button(text=option[0])
            button.bind(on_press=partial(self.changeScreen, option[1]))
            choices.add_widget(button)
        layout.add_widget(choices)

        self.add_widget(layout)

    def changeScreen(self, location, touch):
        self.parent.current = location

class Left(Helper):
    def __init__(self):
        self.name = 'left'

        prompt = "Up or Down?"

        super().__init__(prompt, [['Up', 'up'], ['Down', 'down']])


class Right(Helper):
    def __init__(self):
        self.name = 'right'

        prompt = "You lose"

        super().__init__(prompt, [])


class Start(Helper):
    def __init__(self):
        self.name = 'start'

        prompt = "Left or Right?"

        super().__init__(prompt, [['Left', 'left'], ['Right', 'right']])


class AdventureApp(App):
    def build(self):
        sm = ScreenManager()
        sm.add_widget(Start())
        sm.add_widget(Left())
        sm.add_widget(Right())

        return sm

AdventureApp().run()