<?php

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

    public static function getInstance(): PDO
    {
        if (self::$instance === null) {
            $dsn = sprintf(
                'mysql:host=%s;dbname=%s;charset=%s',
                Env::get('DB_HOST', '127.0.0.1'),
                Env::get('DB_NAME', 'notafilija'),
                Env::get('DB_CHARSET', 'utf8mb4')
            );

            self::$instance = new PDO($dsn, Env::get('DB_USER'), Env::get('DB_PASS'), [
                PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
                PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
                PDO::ATTR_EMULATE_PREPARES   => false,
            ]);
        }

        return self::$instance;
    }

    private function __construct() {}
    private function __clone() {}
}