from otree.api import *

doc = """
One player decides how to divide a certain amount between himself and the other
player.
See: Kahneman, Daniel, Jack L. Knetsch, and Richard H. Thaler. "Fairness
and the assumptions of economics." Journal of business (1986):
S285-S300.
"""


class C(BaseConstants):
    NAME_IN_URL = 'ultimatum'
    PLAYERS_PER_GROUP = 2
    NUM_ROUNDS = 1
    INSTRUCTIONS_TEMPLATE = 'ultimatum/instructions.html'
    # Initial amount allocated to the dictator
    ENDOWMENT = cu(10000)


class Subsession(BaseSubsession):
    pass


class Group(BaseGroup):
    kept = models.CurrencyField(
        doc="""Amount dictator decided to keep for himself""",
        min=0,
        max=C.ENDOWMENT,
        label="自分の取り分",
    )
    offer = models.CurrencyField()
    accept = models.IntegerField(
        choices=[[0, "拒否する"], [1, "受け入れる"]],
        label="選択してください",
    )


class Player(BasePlayer):
    pass


# FUNCTIONS

def set_payoffs(group: Group):
    p1 = group.get_player_by_id(1)
    p2 = group.get_player_by_id(2)
    p1.payoff = group.kept * group.accept
    p2.payoff = (C.ENDOWMENT - group.kept) * group.accept


# PAGES
class Introduction(Page):
    pass

class Offer(Page):
    form_model = 'group'
    form_fields = ['kept']

    @staticmethod
    def is_displayed(player: Player):
        return player.id_in_group == 1

    @staticmethod
    def before_next_page(player, timeout_happened):
        player.group.offer = C.ENDOWMENT - player.group.kept


class Wait(WaitPage):
    title_text = "あなたは後手になりました"
    body_text = "先手の人の選択をお待ちください"


class Accept(Page):
    form_model = 'group'
    form_fields = ['accept']

    @staticmethod
    def is_displayed(player: Player):
        return player.id_in_group == 2


class ResultsWaitPage(WaitPage):
    title_text = "あなたは先手です"
    body_text = "後手の人の選択をお待ちください"
    after_all_players_arrive = set_payoffs


class Results(Page):
    @staticmethod
    def vars_for_template(player: Player):
        group = player.group

        return dict(offer=C.ENDOWMENT - group.kept)


page_sequence = [Introduction, Offer, Wait, Accept, ResultsWaitPage, Results]