<?php
declare(strict_types=1);

require_once __DIR__ . '/../../backend/php/NiroMqttKeepalive.php';

function assertMqttKeepalive(bool $condition, string $message): void
{
    if (!$condition) {
        fwrite(STDERR, "NiroMqttKeepaliveTest failed: {$message}\n");
        exit(1);
    }
}

$keepalive = new NiroMqttKeepalive(100, 15);
for ($now = 101; $now < 115; $now++) {
    assertMqttKeepalive(!$keepalive->isDue($now), 'PINGREQ became due too early');
}
assertMqttKeepalive($keepalive->isDue(115),
    'continuous inbound packets postponed the client PINGREQ');

$keepalive->markSent(115);
assertMqttKeepalive(!$keepalive->isDue(129), 'PINGREQ repeated before its interval');
assertMqttKeepalive($keepalive->isDue(130), 'next PINGREQ was not scheduled');

$invalidIntervalRejected = false;
try {
    new NiroMqttKeepalive(100, 0);
} catch (InvalidArgumentException) {
    $invalidIntervalRejected = true;
}
assertMqttKeepalive($invalidIntervalRejected, 'invalid keepalive interval was accepted');

echo "NiroMqttKeepaliveTest passed\n";