from django.contrib.auth import get_user_model
from django.db import models

User = get_user_model()


class Group(models.Model):
    title = models.CharField(max_length=200)
    slug = models.SlugField(unique=True)
    description = models.TextField()

    def __str__(self):
        return self.title


class Post(models.Model):
    text = models.TextField()
    pub_date = models.DateTimeField("Дата публикации", auto_now_add=True)
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    group = models.ForeignKey(Group, on_delete=models.CASCADE, related_name="group", blank=True, null=True)
    image = models.ImageField(upload_to='posts/', null=True, blank=True)  # поле для картинки

    def __str__(self):
        return self.text


class Comment(models.Model):
    author = models.ForeignKey(User, on_delete=models.CASCADE, related_name="comments")
    post = models.ForeignKey(Post, on_delete=models.CASCADE, related_name="comments")
    text = models.TextField()
    created = models.DateTimeField("Дата добавления", auto_now_add=True, db_index=True)


class Follow(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name="follower")
    author = models.ForeignKey(User, on_delete=models.CASCADE, related_name="following")

    class Meta:
        unique_together = ("user", "author")