from django.conf import settings
from django.db import models

from items.models import Item


class Favorite(models.Model):
    user = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.CASCADE,
        related_name="favorite_entries",
        verbose_name="Пользователь",
    )
    item = models.ForeignKey(
        Item,
        on_delete=models.CASCADE,
        related_name="favorite_entries",
        verbose_name="Товар",
    )
    created_at = models.DateTimeField(auto_now_add=True, verbose_name="Дата добавления")

    class Meta:
        ordering = ("-created_at", "-id")
        constraints = [
            models.UniqueConstraint(fields=("user", "item"), name="unique_favorite_user_item"),
        ]
        verbose_name = "Избранный товар"
        verbose_name_plural = "Избранные товары"

    def __str__(self):
        return f"{self.user} -> {self.item}"