from otree.api import *


doc = """
Your app description
"""


class Constants(BaseConstants):
    name_in_url = 'my_trust'
    players_per_group = 2
    num_rounds = 1

    ENDOWMENT = cu(10)
    MULTIPLICATION_FACTOR = 3

class Subsession(BaseSubsession):
    pass


class Group(BaseGroup):
    sent_amount = models.CurrencyField(
        label="How much do you want to send to participant B?",
        min=0,
        max=Constants.ENDOWMENT

    )
    sent_back_amount = models.CurrencyField(
        label="How much do you want to send back?"
    )

    def sent_back_amount_choices(group):
        return currency_range(
            0,
            group.sent_amount * Constants.MULTIPLICATION_FACTOR,
            1
        )

def set_payoffs(group):
    p1 = group.get_player_by_id(1)
    p2 = group.get_player_by_id(2)
    p1.payoff = Constants.ENDOWMENT - group.sent_amount + group.sent_back_amount
    p2.payoff = group.sent_amount * Constants.MULTIPLICATION_FACTOR - group.sent_back_amount


class Player(BasePlayer):
    pass


# PAGES
class Send(Page):
        form_model = 'group'
        form_fields = ['sent_amount']

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


class WaitForP1(WaitPage):
    pass


class SendBack(Page):
    form_model = 'group'
    form_fields = ['sent_back_amount']

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

    @staticmethod
    def vars_for_template(player):
        group = player.group

        return dict(
            tripled_amount=group.sent_amount * Constants.MULTIPLICATION_FACTOR
        )

class ResultsWaitPage(WaitPage):
    after_all_players_arrive = set_payoffs


class Results(Page):
    pass


page_sequence = [Send, WaitForP1, SendBack,ResultsWaitPage, Results]