from django.contrib.auth import get_user_model
from django.db import models
from django.urls import reverse_lazy
from django.utils.text import slugify
from markdownx.models import MarkdownxField
from markdownx.utils import markdownify
from tagulous.models import TagField


class Category(models.Model):
    title = models.CharField(max_length=40, unique=True)
    slug = models.SlugField(max_length=40, unique=True)

    def save(self):
        if not self.slug:
            self.slug = slugify(self.title)
        return super(Category, self).save()

    def get_absolute_url(self):
        return reverse_lazy("news:list_category", args=[self.slug])

    def __str__(self):
        return self.title

    class Meta:
        ordering = ["title"]


class NewsItem(models.Model):
    title = models.CharField(max_length=200)
    slug = models.SlugField(max_length=200, unique=True)
    category = models.ForeignKey(
        Category, on_delete=models.PROTECT, related_name="news_items"
    )
    body = MarkdownxField()
    origin_text = models.CharField(max_length=200, blank=True, null=True)
    origin_link = models.URLField(blank=True, null=True)
    origin_times_followed = models.PositiveIntegerField(default=0)
    header_img = models.ImageField(blank=True, null=True)
    tags = TagField(
        force_lowercase=True,
        get_absolute_url=lambda tag: reverse_lazy(
            "news:list_tag", kwargs={"tag": tag.slug}
        ),
    )
    created_at = models.DateTimeField(auto_now_add=True)
    is_published = models.BooleanField(default=False)
    is_featured = models.BooleanField(default=False)
    owner = models.ForeignKey(
        get_user_model(), on_delete=models.CASCADE, related_name="news_items"
    )

    def save(self):
        if not self.slug:
            self.slug = slugify(self.title)
        return super(NewsItem, self).save()

    def get_absolute_url(self):
        return reverse_lazy("news:detail", args=[self.category.slug, self.slug])

    def body_as_markdown(self):
        return markdownify(self.body)

    def __str__(self):
        return self.title

    class Meta:
        ordering = ["-created_at"]