from otree.api import *
c = cu

doc = '\nIn a common value auction game, players simultaneously bid on the item being\nauctioned.<br/>\nPrior to bidding, they are given an estimate of the actual value of the item.\nThis actual value is revealed after the bidding.<br/>\nBids are private. The player with the highest bid wins the auction, but\npayoff depends on the bid amount and the actual value.<br/>\n'
class Constants(BaseConstants):
    name_in_url = 'common_value_auction'
    players_per_group = None
    num_rounds = 10
    min_allowable_bid = cu(0)
    max_allowable_bid = cu(10)
    estimate_error_margin = cu(1)
    instructions_template = 'common_value_auction/instructions.html'
def creating_session(subsession):
    session = subsession.session
    for g in subsession.get_groups():
        import random
    
        item_value = random.uniform(
            Constants.min_allowable_bid, Constants.max_allowable_bid
        )
        g.item_value = round(item_value, 1)
class Subsession(BaseSubsession):
    creating_session = creating_session
def set_winner(group):
    import random
    
    players = group.get_players()
    group.highest_bid = max([p.bid_amount for p in players])
    
    players_with_highest_bid = [
        p for p in players if p.bid_amount == group.highest_bid
    ]
    winner = random.choice(
        players_with_highest_bid
    )  # if tie, winner is chosen at random
    winner.is_winner = True
    for p in players:
        p.set_payoff()
def generate_value_estimate(group):
    import random
    
    minimum = group.item_value - Constants.estimate_error_margin
    maximum = group.item_value + Constants.estimate_error_margin
    estimate = random.uniform(minimum, maximum)
    
    estimate = round(estimate, 1)
    
    if estimate < Constants.min_allowable_bid:
        estimate = Constants.min_allowable_bid
    if estimate > Constants.max_allowable_bid:
        estimate = Constants.max_allowable_bid
    
    return estimate
class Group(BaseGroup):
    item_value = models.CurrencyField(doc='Common value of the item to be auctioned random for treatment')
    highest_bid = models.CurrencyField()
    set_winner = set_winner
    generate_value_estimate = generate_value_estimate
def set_payoff(player):
    group = player.group
    if player.is_winner:
        player.payoff = group.item_value - player.bid_amount
    
    else:
        player.payoff = 0
class Player(BasePlayer):
    item_value_estimate = models.CurrencyField(doc='Estimate of the common value may be different for each player')
    bid_amount = models.CurrencyField(doc='Amount bidded by the player', label='Bid amount', max=Constants.max_allowable_bid, min=Constants.min_allowable_bid)
    is_winner = models.BooleanField(doc='Indicates whether the player is the winner', initial=False)
    set_payoff = set_payoff
class Round(Page):
    form_model = 'player'
    @staticmethod
    def before_next_page(player, timeout_happened):
        group = player.group
        player.item_value_estimate = group.generate_value_estimate()
class Bid(Page):
    form_model = 'player'
    form_fields = ['bid_amount']
class ResultsWaitPage(WaitPage):
    after_all_players_arrive = set_winner
class Results(Page):
    form_model = 'player'
    @staticmethod
    def vars_for_template(player):
        group = player.group
        return dict(is_greedy=group.item_value - player.bid_amount < 0)
page_sequence = [Round, Bid, ResultsWaitPage, Results]