from django.db import models
from django.utils.text import slugify
from history_tracking.models import TrackedModel
import pghistory

@pghistory.track()
class Designer(TrackedModel):
    name = models.CharField(max_length=255)
    slug = models.SlugField(max_length=255, unique=True)
    description = models.TextField(blank=True)
    website = models.URLField(blank=True)
    founded_date = models.DateField(null=True, blank=True)
    headquarters = models.CharField(max_length=255, blank=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        ordering = ['name']

    def __str__(self):
        return self.name

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

    @classmethod
    def get_by_slug(cls, slug):
        """Get designer by current or historical slug"""
        try:
            return cls.objects.get(slug=slug), False
        except cls.DoesNotExist:
            # Check historical slugs using pghistory
            history_model = cls.get_history_model()
            history = (
                history_model.objects.filter(slug=slug)
                .order_by('-pgh_created_at')
                .first()
            )
            if history:
                return cls.objects.get(id=history.pgh_obj_id), True
            raise cls.DoesNotExist("No designer found with this slug")