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

doc = '\na.k.a. Keynesian beauty contest.\n\nPlayers all guess a number; whoever guesses closest to\n2/3 of the average wins.\n\nSee https://en.wikipedia.org/wiki/Guess_2/3_of_the_average\n'
class Constants(BaseConstants):
    name_in_url = 'guess_two_thirds'
    players_per_group = 3
    num_rounds = 3
    jackpot = c(100)
    guess_max = 100
    instructions_template = 'guess_two_thirds/instructions.html'
class Subsession(BaseSubsession):
    pass
class Group(BaseGroup):
    two_thirds_avg = models.FloatField()
    best_guess = models.IntegerField()
    num_winners = models.IntegerField()
    def set_payoffs(self):
        players = self.get_players()
        guesses = [p.guess for p in players]
        two_thirds_avg = (2 / 3) * sum(guesses) / len(players)
        self.two_thirds_avg = round(two_thirds_avg, 2)
        
        self.best_guess = min(
            guesses, key=lambda guess: abs(guess - self.two_thirds_avg)
        )
        
        winners = [p for p in players if p.guess == self.best_guess]
        self.num_winners = len(winners)
        
        for p in winners:
            p.is_winner = True
            p.payoff = Constants.jackpot / self.num_winners
    def two_thirds_avg_history(self):
        return [g.two_thirds_avg for g in self.in_previous_rounds()]
class Player(BasePlayer):
    guess = models.IntegerField(label='Please pick a number from 0 to 100', max=Constants.guess_max, min=0)
    is_winner = models.BooleanField(initial=False)