import itertools

from otree.api import *


doc = """
Your app description
"""


class Constants(BaseConstants):
    # NAME_IN_URL = 'trust_tutorial'
    name_in_url = 'trust_tutorial'
    # PLAYERS_PER_GROUP = 2
    players_per_group = 2
    # NUM_ROUNDS = 1
    num_rounds = 1

    endowment = cu(10)
    # multiplication_factor = 3


class Subsession(BaseSubsession):
    pass


class Group(BaseGroup):
    multiplication_factor = models.IntegerField()

    sent_amount = models.CurrencyField(
        label="How much do you want to send to participant B?",
        min=cu(0),
        max=Constants.endowment
    )
    sent_back_amount = models.CurrencyField(
        label="How much do you want to send back?"
    )


class Player(BasePlayer):
    pass


# Functions
def creating_session(subsession):
    treatment = itertools.cycle([3, 4])
    for group in subsession.get_groups():
        group.multiplication_factor = next(treatment)


def sent_back_amount_choices(group):
    return currency_range(
        cu(0),
        group.sent_amount * Constants.multiplication_factor,
        cu(0.5)
    )


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 * group.multiplication_factor - group.sent_back_amount


# 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(
            triple_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]