using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Text;
using System.Xml;
using System.Xml.Serialization;

namespace InfineonHMI.Common;

public static class L4ItXmlSerializer
{
	/// <summary>
	///     Serializes an object.
	/// </summary>
	/// <typeparam name="T"></typeparam>
	/// <param name="serializableObject"></param>
	/// <param name="fileName"></param>
	/// <param name="encrypt"></param>
	/// <param name="rootElementName"></param>

	public static void SerializeObject<T>(T serializableObject, string fileName, bool encrypt = false, string rootElementName = null)
	{
		if (string.IsNullOrEmpty(fileName))
			return;

		if (serializableObject == null)
			return;

		XmlSerializer serializer;
		if (rootElementName != null)
		{
			var xmlRoot = new XmlRootAttribute(rootElementName);
			serializer = new XmlSerializer(serializableObject.GetType(), xmlRoot);
		}
		else
		{
			serializer = new XmlSerializer(serializableObject.GetType());
		}

		try
		{
			var dir = new FileInfo(fileName).DirectoryName;
			if (dir != null && !Directory.Exists(dir)) // Überprüfen Sie, ob dir nicht null ist, bevor Sie es verwenden
				Directory.CreateDirectory(dir);

			var xmlDocument = new XmlDocument();
			using var stream = new MemoryStream();
			serializer.Serialize(stream, serializableObject);
			stream.Position = 0;
			xmlDocument.Load(stream);
			if (encrypt && false)
			{
				//FileEncryption.SaveEncryptedToFile(fileName, xmlDocument.OuterXml);
				return;
			}
			xmlDocument.Save(fileName);
		}
		catch (Exception ex)
		{
			Console.Write(ex);
		}
	}


	/// <summary>
	///     Deserializes an xml file into an object list
	/// </summary>
	/// <typeparam name="T"></typeparam>
	/// <param name="fileName"></param>
	/// <param name="decrypt"></param>
	/// <param name="rootElementName"></param>
	/// <returns></returns>
	/// 
	/// 
	public static T DeSerializeObject<T>(string fileName, bool decrypt = false, string rootElementName = null)
	{
		if (string.IsNullOrEmpty(fileName) || !File.Exists(fileName)) return default!;

		T objectOut;

		try
		{
			string xmlString;
			if (decrypt && false)
			{
				//xmlString = FileEncryption.ReadDecryptedFromFile(fileName)!;
			}
			else
			{
				var xmlDocument = new XmlDocument();
				xmlDocument.Load(fileName);
				xmlString = xmlDocument.OuterXml;
			}

			if (string.IsNullOrEmpty(xmlString))
			{
				// Handle empty xmlString if necessary
				return default!;
			}

			using var read = new StringReader(xmlString);
			var outType = typeof(T);

			XmlSerializer serializer;
			if (rootElementName != null)
			{
				var root = new XmlRootAttribute(rootElementName);
				serializer = new XmlSerializer(outType, root);
			}
			else
			{
				serializer = new XmlSerializer(outType);
			}

			using XmlReader reader = new XmlTextReader(read);
			objectOut = (T)serializer.Deserialize(reader)!;
		}
		catch (Exception ex)
		{
			Console.Write(ex);
			return default!;
		}

		return objectOut;
	}

	public static string Encrypt(string encryptString)
	{
		string EncryptionKey = "0ram@1234xxxxxxxxxxtttttuuuuuiiiiio";  //we can change the code converstion key as per our requirement    
		byte[] clearBytes = Encoding.Unicode.GetBytes(encryptString);
		using (Aes encryptor = Aes.Create())
		{
			Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] {
				0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76
			});
			encryptor.Key = pdb.GetBytes(32);
			encryptor.IV = pdb.GetBytes(16);
			using (MemoryStream ms = new MemoryStream())
			{
				using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
				{
					cs.Write(clearBytes, 0, clearBytes.Length);
					cs.Close();
				}
				encryptString = Convert.ToBase64String(ms.ToArray());
			}
		}
		return encryptString;
	}

	public static string Decrypt(string cipherText)
	{
		string EncryptionKey = "0ram@1234xxxxxxxxxxtttttuuuuuiiiiio";  //we can change the code converstion key as per our requirement, but the decryption key should be same as encryption key    
		cipherText = cipherText.Replace(" ", "+");
		byte[] cipherBytes = Convert.FromBase64String(cipherText);
		using (Aes encryptor = Aes.Create())
		{
			Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] {
				0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76
			});
			encryptor.Key = pdb.GetBytes(32);
			encryptor.IV = pdb.GetBytes(16);
			using (MemoryStream ms = new MemoryStream())
			{
				using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
				{
					cs.Write(cipherBytes, 0, cipherBytes.Length);
					cs.Close();
				}
				cipherText = Encoding.Unicode.GetString(ms.ToArray());
			}
		}
		return cipherText;
	}
}