from django.db import models
from django.conf import settings
from django.contrib.auth.models import User


class Tag(models.Model):
    """태그 모델"""
    name = models.CharField(max_length=50, unique=True)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        ordering = ['name']

    def __str__(self):
        return self.name


class Post(models.Model):
    title = models.CharField(max_length=255)
    content = models.TextField()
    tags = models.ManyToManyField(Tag, related_name='posts', blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    author_id = models.CharField(max_length=150, blank=True, default='')
    author_name = models.CharField(max_length=150)

    class Meta:
        ordering = ['-created_at']

    def __str__(self):
        return self.title


class Comment(models.Model):
    """댓글/대댓글 모델"""
    post = models.ForeignKey(
        Post,
        related_name="comments",
        on_delete=models.CASCADE
    )
    parent = models.ForeignKey(
        'self',
        null=True,
        blank=True,
        related_name="replies",
        on_delete=models.CASCADE
    )  # 대댓글 지원
    content = models.TextField()
    author_id = models.CharField(max_length=150, blank=True, default='')
    author_name = models.CharField(max_length=150)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ['created_at']

    def __str__(self):
        return f"Comment by {self.author_name} on {self.post.title}"