<?php

function cgny_db_connect(): mysqli
{
    static $mysqli = null;
    if ($mysqli instanceof mysqli) {
        return $mysqli;
    }

    $iniPath = __DIR__ . '/db.ini';
    if (!is_readable($iniPath)) {
        throw new RuntimeException('Missing db.ini at ' . $iniPath);
    }

    $cfg = parse_ini_file($iniPath, false, INI_SCANNER_RAW);
    if ($cfg === false) {
        throw new RuntimeException('Unable to parse db.ini');
    }

    foreach (['host', 'database', 'user', 'password'] as $key) {
        if (empty($cfg[$key])) {
            throw new RuntimeException('db.ini missing required key: ' . $key);
        }
    }

    $port = isset($cfg['port']) ? (int) $cfg['port'] : 3306;
    mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);

    $mysqli = new mysqli($cfg['host'], $cfg['user'], $cfg['password'], $cfg['database'], $port);
    $mysqli->set_charset('utf8mb4');

    return $mysqli;
}

function cgny_cron_log(string $script, string $message): void
{
    $logDir = __DIR__ . '/logs';
    if (!is_dir($logDir)) {
        mkdir($logDir, 0750, true);
    }

    $line = date('Y-m-d H:i:s') . ' [' . $script . '] ' . $message . PHP_EOL;
    file_put_contents($logDir . '/' . $script . '.log', $line, FILE_APPEND | LOCK_EX);
}