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


doc = """
This bargaining game involves 2 players. Each demands for a portion of some
available amount. If the sum of demands is no larger than the available
amount, both players get demanded portions. Otherwise, both get nothing.
"""


class Constants(BaseConstants):
    name_in_url = 'bargaining'
    players_per_group = 2
    num_rounds = 4

    instructions_template = 'bargaining/instructions.html'

    amount_shared = c(100)


class Subsession(BaseSubsession):
    def creating_session(self):
        import itertools
        chat = itertools.cycle([True, False])
        for g in self.get_groups():
            g.treatment = next(chat)


class Group(BaseGroup):

    total_requests = models.CurrencyField()

    treatment = models.BooleanField()

    def set_payoffs(self):
        players = self.get_players()
        self.total_requests = sum([p.final_request for p in players])
        if self.total_requests <= Constants.amount_shared:
            for p in players:
                p.payoff = p.final_request
        else:
            for p in players:
                p.payoff = c(0)


class Player(BasePlayer):
    request = models.CurrencyField(
        doc="""
        Amount requested by this player.
        """,
        min=0, max=Constants.amount_shared
    )

    final_request = models.CurrencyField(
        doc="""
        Final amount requested by this player.
        """,
        min=0, max=Constants.amount_shared
    )

    def other_player(self):
        return self.get_others_in_group()[0]