from django.db import models

import uuid


class BaseModel(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)

    # Timestamps
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        abstract = True


class EventQuerySet(models.QuerySet):
    def available_to(self, user):
        """Unavailable events are hidden from everyone but staff, so they can
        still be prepared before being opened up."""
        if user is not None and user.is_staff:
            return self
        return self.filter(is_available=True)


class Event(BaseModel):
    name = models.CharField(max_length=255)
    path = models.SlugField(max_length=100, unique=True)
    is_available = models.BooleanField(default=True)

    objects = EventQuerySet.as_manager()

    def __str__(self) -> str:
        return self.name