<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Support\Str;

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

    /**
     * Get the products that have this tag.
     */
    public function products(): BelongsToMany
    {
        return $this->belongsToMany(Product::class);
    }

    /**
     * Generate a unique slug for the tag based on its name.
     */
    public static function generateUniqueSlug(string $name, ?int $excludeId = null): string
    {
        $slug = Str::slug($name);
        $originalSlug = $slug;
        $count = 1;

        // Keep appending numbers until we find a unique slug
        $query = static::where('slug', $slug);
        if ($excludeId) {
            $query->where('id', '!=', $excludeId);
        }

        while ($query->exists()) {
            $slug = $originalSlug . '-' . $count;
            $count++;
            $query = static::where('slug', $slug);
            if ($excludeId) {
                $query->where('id', '!=', $excludeId);
            }
        }

        return $slug;
    }

    /**
     * Get the route key for the model.
     */
    public function getRouteKeyName(): string
    {
        return 'slug';
    }
}