<?php
declare(strict_types=1);
header('Content-Type: application/json');

require_once __DIR__ . '/protecao.php';
require __DIR__ . '/../vendor/autoload.php';

use PhpMqtt\Client\MqttClient;
use PhpMqtt\Client\ConnectionSettings;

$uid     = trim($_POST['uid']     ?? '');
$payload = trim($_POST['payload'] ?? '');

if ($uid === '' || $payload === '') {
    http_response_code(400);
    echo json_encode(['ok' => false, 'error' => 'parametros invalidos']);
    exit;
}

// Validar JSON
if (json_decode($payload) === null) {
    http_response_code(400);
    echo json_encode(['ok' => false, 'error' => 'payload invalido']);
    exit;
}

try {
    $settings = (new ConnectionSettings())
        ->setUsername('xupa')
        ->setPassword('xupa')
        ->setUseTls(true)
        ->setTlsSelfSignedAllowed(true)
        ->setConnectTimeout(5)
        ->setSocketTimeout(3);

    $mqtt = new MqttClient('mqtt.xupas.mywire.org', 8883, 'web-pub-' . getmypid());
    $mqtt->connect($settings, false);
    $mqtt->publish("esp/$uid/cmd", $payload, 1, false);
    $mqtt->disconnect();

    echo json_encode(['ok' => true, 'uid' => $uid]);

} catch (Throwable $e) {
    http_response_code(500);
    echo json_encode(['ok' => false, 'error' => $e->getMessage()]);
}