<?php

class Database
{
    private static ?PDO $pdo = null;

    public static function connect(): PDO
    {
        if (self::$pdo === null) {
            $config = require __DIR__ . '/../config/config.php';

            $dsn = "mysql:host={$config['host']};dbname={$config['dbname']};charset={$config['charset']}";

            try {
                self::$pdo = new PDO($dsn, $config['user'], $config['password'], [
                    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
                    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
                ]);
            } catch (PDOException $e) {
                die("Datenbankverbindung fehlgeschlagen: " . $e->getMessage());
            }
        }

        return self::$pdo;
    }
}