from otree.api import Currency as c, currency_range

from ._builtin import Page, WaitPage
from .models import Constants


class Doui(Page):
    form_model = 'player'
    form_fields = ['doui']

class Back(Page):
    def is_displayed(self):
        return self.player.doui == 'N'
    form_model = 'player'
    form_fields = ['back']

class NO(Page):
    def is_displayed(self):
        return self.player.doui == 'N' and self.player.back == 'N'

class Wait(Page):
    def is_displayed(self):
        return self.player.doui == 'Y' or self.player.back == 'Y'

page_sequence = [Doui, Back, NO, Wait]