from django.db import models
from django.urls import reverse
from django.utils.text import slugify


class MainProduct(models.Model):
    name = models.CharField(max_length=200)
    slug = models.SlugField(unique=True, blank=True)
    short_description = models.CharField(max_length=300)
    description = models.TextField()
    image = models.ImageField(upload_to="products/main/", blank=True, null=True)
    order = models.PositiveIntegerField(default=0)
    is_active = models.BooleanField(default=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ["order", "name"]
        verbose_name = "Main Product"
        verbose_name_plural = "Main Products"

    def __str__(self):
        return self.name

    def save(self, *args, **kwargs):
        if not self.slug:
            self.slug = slugify(self.name)
        super().save(*args, **kwargs)

    def get_absolute_url(self):
        return reverse("products:main_product_detail", kwargs={"main_slug": self.slug})


class SubProduct(models.Model):
    main_product = models.ForeignKey(
        MainProduct,
        on_delete=models.CASCADE,
        related_name="sub_products",
    )
    name = models.CharField(max_length=200)
    slug = models.SlugField(blank=True)
    short_description = models.CharField(max_length=300)
    description = models.TextField()
    image = models.ImageField(upload_to="products/sub/", blank=True, null=True)
    order = models.PositiveIntegerField(default=0)
    is_active = models.BooleanField(default=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ["order", "name"]
        unique_together = [["main_product", "slug"]]
        verbose_name = "Sub Product"
        verbose_name_plural = "Sub Products"

    def __str__(self):
        return f"{self.main_product.name} › {self.name}"

    def save(self, *args, **kwargs):
        if not self.slug:
            self.slug = slugify(self.name)
        super().save(*args, **kwargs)

    def get_absolute_url(self):
        return reverse(
            "products:sub_product_detail",
            kwargs={
                "main_slug": self.main_product.slug,
                "sub_slug": self.slug,
            },
        )


class Article(models.Model):
    sub_product = models.ForeignKey(
        SubProduct,
        on_delete=models.CASCADE,
        related_name="articles",
    )
    title = models.CharField(max_length=300)
    description = models.TextField()
    order = models.PositiveIntegerField(default=0)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ["order", "title"]
        verbose_name = "Article"
        verbose_name_plural = "Articles"

    def __str__(self):
        return self.title


class ArticleSection(models.Model):
    article = models.ForeignKey(
        Article,
        on_delete=models.CASCADE,
        related_name="sections",
    )
    title = models.CharField(max_length=200)
    value = models.TextField()
    order = models.PositiveIntegerField(default=0)

    class Meta:
        ordering = ["order"]
        verbose_name = "Article Section"
        verbose_name_plural = "Article Sections"

    def __str__(self):
        return f"{self.article.title} › {self.title}"