from otree.api import (
    models, widgets, BaseConstants, BaseSubsession, BaseGroup, BasePlayer,
    Currency as c, currency_range
)


author = 'Your name here'

doc = """
Your app description
"""


class Constants(BaseConstants):
    name_in_url = 'TG'
    players_per_group = 2
    num_rounds = 5

    endowment = c(30)
    multiplication_factor = 3


class Subsession(BaseSubsession):

    """ Randomly match two players together while each individual's role is fixed."""
    def before_session_starts(self):
        self.group_randomly(fixed_id_in_group=True)


class Player(BasePlayer):

    """ Want player 2 to be a player from another game..."""
    def role(self):
        return {1: 'Sender', 2: 'Receiver'}[self.id_in_group]


class Group(BaseGroup):

    """ Choices for Sender"""
    sent_amount = models.CurrencyField(
        choices=currency_range(0, Constants.endowment, c(1)),
        # widget=widgets.SliderInput(attrs={'step': '1'}),
        doc="""Amount sent by Sender""",
    )

    """ Choices for Receiver"""
    sent_back_amount = models.CurrencyField(
        doc="""Amount returned by Receiver""",
        min=c(0),
        widget=widgets.SliderInput(attrs={'step': c(1)})
    )

    """ Payoff for each player per round"""
    def set_payoffs(self):
        p1 = self.get_player_by_id(1)
        p2 = self.get_player_by_id(2)
        p1.payoff = Constants.endowment - self.sent_amount + self.sent_back_amount
        p2.payoff = self.sent_amount * Constants.multiplication_factor - self.sent_back_amount