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

author = 'Your name here'

doc = """
Your app description
"""


class Constants(BaseConstants):
    name_in_url = 'simple_auction'
    players_per_group = 4
    num_rounds = 1

    fix_pay = c(20)


class Subsession(BaseSubsession):
    def creating_session(self):
        for p in self.get_players():
            p.valuation = random.randint(0, 100) #Before the session starts, everyone gets assigned an induced valuation.


class Group(BaseGroup):
    winner_id = models.IntegerField()  #Saving ID of winner in data

    def set_payoffs(self):
        players = self.get_players()
        bids = [p.bid for p in players]
        max_bid = max(bids)
        self.winner_id = random.choice([p.id_in_group for p in players if p.bid == max_bid]) #random choice from those who made the max bid.
        for p in players:
            if p.id_in_group == self.winner_id:
                p.winner = True
                p.payoff = Constants.fix_pay + (p.valuation - p.bid)
            else:
                p.payoff = Constants.fix_pay



class Player(BasePlayer):
    valuation = models.CurrencyField()
    bid = models.CurrencyField(label="How much do you want to bid?",
                               min=0, max=100)

    winner = models.BooleanField(initial=False)