<?php

declare(strict_types=1);

namespace LinkCheckup\Shared\Database;

use function floor;
use function hrtime;

final class DatabaseHealth {

	private const NANOSECONDS_PER_MILLISECOND = 1000000;

	public function __construct( private QueryRunner $query_runner ) {
	}

	public function response_ms(): int {
		$started_at = hrtime( true );

		$this->query_runner->value( 'SELECT 1' );

		$elapsed = hrtime( true ) - $started_at;

		return (int) floor( $elapsed / self::NANOSECONDS_PER_MILLISECOND );
	}
}