<?php

namespace App\Actions\Events;

use App\Models\Event;
use Illuminate\Support\Str;

class UpdateEventAction
{
    public function execute(Event $event, array $data): Event
    {
        return \Illuminate\Support\Facades\DB::transaction(function () use ($event, $data) {
            if (isset($data['slug']) && $data['slug'] !== $event->slug) {
                $data['slug'] = $this->generateUniqueSlug($data['slug'], $event->id);
            }
            $event->update($data);

            return $event->fresh();
        });
    }

    protected function generateUniqueSlug(string $base, int $excludeId): string
    {
        $slug = Str::slug($base);
        $original = $slug;
        $count = 0;
        while (Event::where('slug', $slug)->where('id', '!=', $excludeId)->exists()) {
            $count++;
            $slug = $original.'-'.$count;
        }

        return $slug;
    }
}