from django.db import models

from ordered_model.models import OrderedModel


class Article(models.Model):
    title = models.CharField(max_length=255)
    description = models.TextField()
    content = models.TextField()
    date_created = models.DateTimeField(auto_now_add=True)
    date_modified = models.DateTimeField(auto_now=True)
    category = models.ForeignKey("Category", on_delete=models.CASCADE, null=True, blank=True)
    tags = models.ManyToManyField("Tag", blank=True)
    author = models.ForeignKey("user.User", on_delete=models.CASCADE, null=True, blank=True)


    def __str__(self):
        return self.title


class Category(OrderedModel):
    name = models.CharField(max_length=255)

    class Meta(OrderedModel.Meta):
        verbose_name_plural = "Categories"

    def __str__(self):
        return self.name


class Tag(models.Model):
    name = models.CharField(max_length=255)

    def __str__(self):
        return self.name


class Comment(models.Model):
    author = models.ForeignKey("user.User", on_delete=models.CASCADE)
    article = models.ForeignKey("Article", on_delete=models.CASCADE)
    content = models.TextField()
    date_created = models.DateTimeField(auto_now_add=True)
    date_modified = models.DateTimeField(auto_now=True)
    response_to = models.ForeignKey("self", on_delete=models.CASCADE, null=True, blank=True)