from otree.api import *




doc = """
This is a standard 2-player trust where the amount sent by player 1 gets
tripled. The trust 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 C(BaseConstants):
    NAME_IN_URL = 'trust2'
    PLAYERS_PER_GROUP = 2
    NUM_ROUNDS = 1
    INSTRUCTIONS_TEMPLATE = 'trust2/Instructions.html'
    # Initial amount allocated to each player
    ENDOWMENT = cu(100)
    MULTIPLIER = 3


class Subsession(BaseSubsession):
    pass


class Group(BaseGroup):
    sent_amount = models.CurrencyField(
        min=0,
        max=C.ENDOWMENT,
        doc="""Amount sent by P1""",
        label="Please enter an amount from 0 to 100:",
    )
    sent_back_amount = models.CurrencyField(doc="""Amount sent back by P2""", min=cu(0))


class Player(BasePlayer):
    pass


# FUNCTIONS
def sent_back_amount_max(group: Group):
    return group.sent_amount * C.MULTIPLIER


def set_payoffs(group: 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.MULTIPLIER - group.sent_back_amount


# PAGES
class Introduction(Page):
    @staticmethod
    def is_displayed(player: Player):
        return player.participant.vars['consent'].lower() == 'consent'


class Send(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 and player.participant.vars['consent'].lower() == 'consent'


class SendBackWaitPage(WaitPage):
    @staticmethod
    def is_displayed(player: Player):
        return player.participant.vars['consent'].lower() == 'consent'


class SendBack(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 and player.participant.vars['consent'].lower() == 'consent'


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

        tripled_amount = group.sent_amount * C.MULTIPLIER
        return dict(tripled_amount=tripled_amount)


class ResultsWaitPage(WaitPage):
    after_all_players_arrive = set_payoffs
    @staticmethod
    def is_displayed(player: Player):
        return player.participant.vars['consent'].lower() == 'consent'


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 * C.MULTIPLIER)

    @staticmethod
    def is_displayed(player: Player):
        player.participant.vars['payoff_trust'] = player.payoff
        return player.participant.vars['consent'].lower() == 'consent'

page_sequence = [
    Introduction,
    Send,
    SendBackWaitPage,
    SendBack,
    ResultsWaitPage,
    Results,
]