<?php

namespace App\Libraries;

use Throwable;

class Encrypter
{
    private const PREFIX = 'enc::';

    public function encrypt(string $plainText): string
    {
        if ($plainText === '' || str_starts_with($plainText, self::PREFIX)) {
            return $plainText;
        }

        $encrypted = service('encrypter')->encrypt($plainText);
        return self::PREFIX . base64_encode($encrypted);
    }

    public function decrypt(string $cipherText): string
    {
        if ($cipherText === '') {
            return $cipherText;
        }

        if (! str_starts_with($cipherText, self::PREFIX)) {
            return $cipherText;
        }

        try {
            $payload = base64_decode(substr($cipherText, strlen(self::PREFIX)), true);
            if ($payload === false) {
                return '';
            }

            return (string) service('encrypter')->decrypt($payload);
        } catch (Throwable) {
            return '';
        }
    }
}