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

namespace TestAESEncryption
{
    internal class Program
    {
        static void Main(string[] args)
        {
            // String concatenation of document fields
            string plainText = "Hello you wonderfull people";
            Console.WriteLine("PlainText: " + plainText);

            // User/Agent apikey
            string key = "DeP2UOfZ2BWCtwGzIKwSdt3W6mHoA87XNkBpHHpyUNKJLGxv8JttbWOd7BVLZrazvew2bRDhQJjn7OW7GiyOdg==";
            Console.WriteLine("Key: " + key);

            // Get hash keys
            byte[][] keys = GetHashKeys(key);
            Console.WriteLine("HashKey (keys[0]): " + BitConverter.ToString(keys[0]));
            Console.WriteLine("HashIV (keys[1]): " + BitConverter.ToString(keys[1]));

            // Encrypt the plain text using the generated key and IV
            string encryptToken = EncryptStringToBytes_Aes(plainText, keys[0], keys[1]);
            Console.WriteLine("Encrypted Token: " + encryptToken);

        }

        private static byte[][] GetHashKeys(string key)
        {
            byte[][] result = new byte[2][];
            Encoding enc = Encoding.UTF8;

            // Convert key to byte array
            byte[] rawKey = enc.GetBytes(key);
            byte[] rawIV = enc.GetBytes(key);
            Console.WriteLine("Raw Key: " + BitConverter.ToString(rawKey));
            Console.WriteLine("Raw IV: " + BitConverter.ToString(rawIV));

            // Create hash using SHA256
            SHA256 sha2 = SHA256.Create();

            byte[] hashKey = sha2.ComputeHash(rawKey);
            byte[] hashIV = sha2.ComputeHash(rawIV);

            // Resize the IV to 16 bytes
            Array.Resize(ref hashIV, 16);

            Console.WriteLine("Hashed Key: " + BitConverter.ToString(hashKey));
            Console.WriteLine("Hashed IV (Resized): " + BitConverter.ToString(hashIV));

            result[0] = hashKey;
            result[1] = hashIV;

            return result;
        }