from otree.api import *
from otree.models import group

#from otree.app_template.models import Constants

doc = """
Your app description
"""


class C(BaseConstants):
    NAME_IN_URL = 'trust_tutorial'
    PLAYERS_PER_GROUP = 2
    NUM_ROUNDS = 2

    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=cu(0),
        max=C.ENDOWMENT
    )
    sent_back_amount = models.CurrencyField(
        label="How much do you want to send back to participant A?"
    )


class Player(BasePlayer):
    pass

# Functions
def sent_back_amount_choices(group):
    return currency_range(
        cu(0),
        group.sent_amount * C.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 = C.ENDOWMENT - group.sent_amount + group.sent_back_amount
    p2.payoff = group.sent_amount * C.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(
            tripled_amount=group.sent_amount * C.MULTIPLICATION_FACTOR
        )


class ResultsWaitPage(WaitPage):
    after_all_players_arrive = set_payoffs


class Results(Page):
    pass


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