<?php
namespace App\Services;

use Kreait\Firebase\Factory;
use Kreait\Firebase\Messaging\CloudMessage;
use Kreait\Firebase\Messaging\MulticastSendReport;
use Kreait\Firebase\Messaging\Notification;
use Kreait\Firebase\Messaging\WebPushConfig;

class FirebaseNotificationService
{
    protected $messaging;

    public function __construct(string $credentials)
    {
        $factory = (new Factory)
            ->withServiceAccount(config_path($credentials));
        $this->messaging = $factory->createMessaging();
    }

    public function sendNotification(array $tokens, string $title, string $body, ?string $img = null): MulticastSendReport
    {
        $notification = Notification::create($title, $body);

        $message = CloudMessage::new()
            ->withNotification($notification);

        if ($img) {
            $message = $message->withWebPushConfig(
                WebPushConfig::create()->withNotification([
                    'icon' => $img,
                    'badge' => $img,
                    'image' => $img
                ])
            );
        }

        try {
            return $this->messaging->sendMulticast($message, $tokens);
        } catch (\Throwable $e) {
            logger()->error('FCM Error: '.$e->getMessage(), [
                'token' => $tokens,
                'error' => $e
            ]);
            throw $e;
        }
    }
}