from otree.api import *

c = Currency  # old name for currency; you can delete this.


doc = """
This is a standard 2-player trust game where the amount sent by player 1 gets
tripled. The trust game was first proposed by
<a href="http://econweb.ucsd.edu/~jandreon/Econ264/papers/Berg%20et%20al%20GEB%201995.pdf" target="_blank">
    Berg, Dickhaut, and McCabe (1995)
</a>.
"""


class Constants(BaseConstants):
    name_in_url = 'trust'
    players_per_group = 2
    num_rounds = 1
    instructions_template = 'trust/instructions.html'


class Subsession(BaseSubsession):
    pass


class Group(BaseGroup):
    sent_amount = models.FloatField(
        min=0,
        max=100,
        doc="""cva""",
        label="Input 0 to 100(%):",
    )
    sent_back_amount = models.CurrencyField(doc="""Amount sent back by P2""", min=cu(0))


class Player(BasePlayer):
    pass


def sent_back_amount_max(group: Group):
    return group.sent_amount * Constants.multiplier


def set_payoffs(group: 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.multiplier - group.sent_back_amount


# PAGES
class Introduction(Page):
    pass


class Tax(Page):
    """This page is only for P1
    P1 sends amount (all, some, or none) to P2
    This amount is tripled by experimenter,
    i.e if sent amount by P1 is 5, amount received by P2 is 15"""

    form_model = 'group'
    form_fields = ['sent_amount']

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


class SendBackWaitPage(WaitPage):
    pass


class Response(Page):
    """This page is only for P2
    P2 sends back some amount (of the tripled amount received) to P1"""

    form_model = 'group'
    form_fields = ['sent_back_amount']

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

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

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


class ResultsWaitPage(WaitPage):
    after_all_players_arrive = set_payoffs


class Results(Page):
    """This page displays the earnings of each player"""

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

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


page_sequence = [
    Introduction,
    Tax,
    SendBackWaitPage,
    Response,
    ResultsWaitPage,
    Results,
]