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


class PodcastCategory(models.Model):
    name = models.CharField(max_length=120)
    slug = models.SlugField(max_length=140, unique=True)
    description = models.TextField(blank=True)
    thumbnail = models.CharField(max_length=255, blank=True)
    added_by = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
        related_name='podcast_categories',
    )
    created_at = models.DateTimeField(null=True, blank=True)

    class Meta:
        ordering = ['name']
        verbose_name_plural = 'podcast categories'

    def __str__(self):
        return self.name

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


class PodcastEpisode(models.Model):
    title = models.CharField(max_length=220)
    slug = models.SlugField(max_length=240, unique=True)
    description = models.TextField()
    episode_number = models.PositiveIntegerField()
    duration_display = models.CharField(max_length=20, default='45 min')
    guest_name = models.CharField(max_length=120, blank=True)
    cover_image_url = models.URLField(blank=True)
    audio_url = models.URLField(blank=True)
    is_featured = models.BooleanField(default=False)
    is_published = models.BooleanField(default=True)
    published_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        ordering = ['-episode_number']
        verbose_name = 'podcast episode'

    def __str__(self):
        return f'Ep {self.episode_number}: {self.title}'

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

    def get_absolute_url(self):
        return reverse('podcast:detail', kwargs={'slug': self.slug})