<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Support\Str;

class Category extends Model
{
    use HasFactory;

    /**
     * The attributes that are mass assignable.
     *
     * @var array<int, string>
     */
    protected $fillable = [
        'name',
        'slug',
        'description',
    ];

    /**
     * Boot the model and register model events.
     */
    protected static function booted(): void
    {
        static::creating(function (Category $category): void {
            if (blank($category->slug)) {
                $category->slug = static::generateUniqueSlug($category->name);
            }
        });

        static::updating(function (Category $category): void {
            if ($category->isDirty('name') && blank($category->slug)) {
                $category->slug = static::generateUniqueSlug($category->name, $category->id);
            }
        });
    }

    /**
     * Get the posts associated with the category.
     */
    public function posts(): HasMany
    {
        return $this->hasMany(Post::class);
    }

    /**
     * Generate a unique slug based on the category name.
     */
    public static function generateUniqueSlug(string $name, ?int $ignoreId = null): string
    {
        $baseSlug = Str::slug($name);
        $slug = $baseSlug;
        $counter = 1;

        while (static::query()
            ->where('slug', $slug)
            ->when($ignoreId, fn ($query) => $query->whereKeyNot($ignoreId))
            ->exists()) {
            $slug = "{$baseSlug}-{$counter}";
            $counter++;
        }

        return $slug;
    }
}