<?php
namespace Incoviba\Service;

use Incoviba\Exception\MQTT as MQTTException;
use Incoviba\Service\MQTT\MQTTInterface;

class MQTT implements MQTTInterface
{
    protected array $clients = [];
    public function register(string $name, MQTTInterface $client): self
    {
        $this->clients[$name] = $client;
        return $this;
    }
    public function clientExists(string $name): bool
    {
        return isset($this->clients[$name]);
    }

    /**
     * @param string|null $name
     * @return MQTTInterface
     * @throws MQTTException/MissingClient
     */
    public function getClient(?string $name = null): MQTTInterface
    {
        if ($name === null) {
            $name = array_keys($this->clients)[0];
        }
        if (!$this->clientExists($name)) {
            throw new MQTTException\MissingClient($name);
        }
        return $this->clients[$name];
    }

    /**
     * @param string|null $host
     * @return bool
     * @throws MQTTException/MissingClient
     * @throws MQTTException/MissingJob
     */
    public function exists(?string $host = null): bool
    {
        $client = $this->getClient($host);
        return $client->exists();
    }

    /**
     * @param string|null $host
     * @return string
     * @throws MQTTException/MissingClient
     * @throws MQTTException/MissingJob
     */
    public function get(?string $host = null): string
    {
        $client = $this->getClient($host);
        return $client->get();
    }

    /**
     * @param string $value
     * @param int $delay
     * @param string|null $host
     * @return $this
     * @throws MQTTException/MissingClient
     * @throws MQTTException/SetJob
     */
    public function set(string $value, int $delay = 0, ?string $host = null): self
    {
        $client = $this->getClient($host);
        $client->set($value, $delay);
        return $this;
    }

    /**
     * @param int|null $jobId
     * @param string|null $host
     * @return $this
     * @throws MQTTException/MissingJob
     * @throws MQTTException/RemoveJob
     */
    public function remove(?int $jobId = null, ?string $host = null): self
    {
        $this->getClient($host)->remove($jobId);
        return $this;
    }

    /**
     * @param string $newPayload
     * @param int|null $jobId
     * @param string|null $host
     * @return $this
     * @throws MQTTException/MissingJob
     * @throws MQTTException/RemoveJob
     * @throws MQTTException/SetJob
     */
    public function update(string $newPayload, ?int $jobId = null, ?string $host = null): self
    {
        $this->getClient($host)->update($newPayload, $jobId);
        return $this;
    }
}