import random

from django.db import models

# Create your models here.
from django.utils import timezone


def generate_token():
    letters = 'qwertyuioppasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM1234567890'
    return ''.join([random.choice(letters) for _ in range(30)])


class Game(models.Model):
    last_move_ts = models.DateTimeField(default=timezone.now)
    turn = models.IntegerField(default=0)


class Player(models.Model):
    game = models.ForeignKey(Game, on_delete=models.CASCADE)
    field = models.CharField(max_length=100, default=' ' * 100)
    number = models.IntegerField()
    attend_token = models.CharField(max_length=30, default=generate_token)
    token = models.CharField(max_length=30, null=True, blank=True)

    class Meta:
        constraints = [
            models.UniqueConstraint(fields=['token'], name='unique_player_token'),
            models.UniqueConstraint(fields=['attend_token'], name='unique_player_attend_token')
        ]