<?php
declare(strict_types=1);

require_once __DIR__ . '/Config.php';

final class Db {
    private static ?PDO $pdo = null;

    public static function pdo(): PDO {
        if (self::$pdo !== null) return self::$pdo;
        $dsn = sprintf(
            'mysql:host=%s;port=%s;dbname=%s;charset=utf8mb4',
            Config::get('DB_HOST', '127.0.0.1'),
            Config::get('DB_PORT', '3306'),
            Config::get('DB_NAME')
        );
        self::$pdo = new PDO($dsn, Config::get('DB_USER'), Config::get('DB_PASS'), [
            PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
            PDO::ATTR_EMULATE_PREPARES   => false,
        ]);
        // Hora de Panamá (UTC-5, sin DST) — defensivo aunque el OS ya esté en Panamá
        self::$pdo->exec("SET time_zone = '-05:00'");
        return self::$pdo;
    }
}