<?php
// phpcs:ignoreFile

require_once __DIR__ . '/../config.php';

/**
 * Create and return a new mysqli connection using the shared configuration.
 *
 * @return mysqli
 */
function controls_db_connect()
{
    if (!defined('DB_HOST') || !defined('DB_USER') || !defined('DB_PASSWORD') || !defined('DB_DATABASE')) {
        $configPath = __DIR__ . '/../config.php';
        if (file_exists($configPath)) {
            require $configPath;
        }
    }

    if (!defined('DB_HOST') || !defined('DB_USER') || !defined('DB_PASSWORD') || !defined('DB_DATABASE')) {
        throw new RuntimeException('Database configuration constants are not defined.');
    }

    if (!function_exists('mysqli_report')) {
        throw new RuntimeException('The mysqli extension is not available.');
    }

    mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
    $connection = new mysqli(DB_HOST, DB_USER, DB_PASSWORD, DB_DATABASE);
    $connection->set_charset('utf8mb4');

    return $connection;
}