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

author = 'Your name here'

doc = """
Simple public goods game
"""


class Constants(BaseConstants):
    name_in_url = 'public_goods_simple'
    players_per_group = 3
    num_rounds = 1

    endowment = c(100)
    multiplier = 1.8


class Subsession(BaseSubsession):
    pass


class Group(BaseGroup):
    total_contribution = models.CurrencyField()
    individual_share = models.CurrencyField()

    def set_payoffs(self):
        players = self.get_players()
        contributions = [p.contribution for p in players]
        self.total_contribution = sum(contributions)
        self.individual_share = self.total_contribution * Constants.multiplier / Constants.players_per_group
        for p in self.get_players():
            p.payoff = Constants.endowment - p.contribution + self.individual_share


class Player(BasePlayer):
    contribution = models.CurrencyField(min=0, max=Constants.endowment)