using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;

public class EncryptionHelper
{
    private static readonly byte[] Key = Encoding.UTF8.GetBytes("HWJGbwmF2pWdXySDExMNEbJSrXn0YCBF"); // 32 bytes for AES-256
    private static readonly byte[] IV = Encoding.UTF8.GetBytes("VWYRtYCfch0sKs6k"); // 16 bytes

    public static string EncryptData(string plainText)
    {
        using (Aes aes = Aes.Create())
        {
            aes.Key = Key;
            aes.IV = IV;
            aes.Mode = CipherMode.CBC;
            aes.Padding = PaddingMode.PKCS7;

            using (MemoryStream ms = new MemoryStream())
            using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
            {
                using (StreamWriter sw = new StreamWriter(cs, new UTF8Encoding(false))) // 🔹 Disable BOM
                {
                    sw.Write(plainText);
                }
                byte[] encryptedBytes = ms.ToArray();
                string encryptedBase64 = Convert.ToBase64String(encryptedBytes);

                Console.WriteLine("🔹 [DEBUG] Encrypted Data (Base64): " + encryptedBase64); // ✅ Debugging
                return encryptedBase64;
            }
        }
    }
}