<?php
declare(strict_types=1);

namespace HttpServer\Events;


use Exception;
use HttpServer\Abstracts\Callback;
use Kafka\Struct;
use Snowflake\Crontab\Crontab;
use Snowflake\Event;
use Swoole\Server;

/**
 * Class OnPipeMessage
 * @package HttpServer\Events
 */
class OnPipeMessage extends Callback
{

    /**
     * @param Server $server
     * @param int $src_worker_id
     * @param $swollen_universalize
     * @throws Exception
     */
    public function onHandler(Server $server, int $src_worker_id, $swollen_universalize)
    {
        go(function () use ($server, $src_worker_id, $swollen_universalize) {
            match ($swollen_universalize['action'] ?? null) {
                'kafka' => $this->onKafkaWorker($swollen_universalize),
                'crontab' => $this->onCrontabWorker($swollen_universalize),
                default => $this->onMessageWorker($server, $src_worker_id, $swollen_universalize)
            };
            fire(Event::SYSTEM_RESOURCE_RELEASES);
        });
    }


    /**
     * @param array $message
     * @return string
     * @throws Exception
     */
    private function onCrontabWorker(array $message): string
    {
        if (empty($handler = $message['handler'] ?? null)) {
            throw new Exception('unknown handler');
        }
        /** @var Crontab $handler */
        $handler->increment()->execute();
        return 'success';
    }


    /**
     * @param $server
     * @param $src_worker_id
     * @param $message
     * @return string
     * @throws Exception
     */
    private function onMessageWorker($server, $src_worker_id, $message): string
    {
        fire(Event::PIPE_MESSAGE, [$server, $src_worker_id, $message]);

        return 'success';
    }


    /**
     * @param array $message
     * @return string
     */
    private function onKafkaWorker(array $message): string
    {
        [$topic, $rdMessage] = $message['body'];

        call_user_func($message['handler'], new Struct($topic, $rdMessage));

        return 'success';
    }


}