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

doc = ''
class Constants(BaseConstants):
    name_in_url = 'my_public_goods'
    players_per_group = 3
    num_rounds = 1
    endowment = c(100)
    multiplier = 2
class Subsession(BaseSubsession):
    pass
def set_payoffs(group):
    players = group.get_players()
    contributions = [p.contribution for p in players]
    group.total_contribution = sum(contributions)  
    group.individual_share = group.total_contribution*Constants.multiplier/Constants.players_per_group
    for p in players:
        p.payoff = Constants.endowment-p.contribution+group.individual_share
    payoffs = [p.payoff for p in players]
    print('payoffs are:', payoffs)
    group.total_payoff = sum(payoffs)
    
class Group(BaseGroup):
    total_contribution = models.CurrencyField()
    individual_share = models.CurrencyField()
    total_payoff = models.CurrencyField()
    set_payoffs = set_payoffs
class Player(BasePlayer):
    contribution = models.CurrencyField(label='How much do you want to contribute?', max=Constants.endowment, min=0)