using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Zepheus.Util;

namespace Nif_Converter
{
    class Program
    {
        static void Main(string[] args)
        {
            foreach(var FilePath in Directory.GetFiles(Environment.CurrentDirectory, "*.nif", SearchOption.AllDirectories))
            {
                Byte[] NifArray = File.ReadAllBytes(FilePath);

                using(MemoryStream Stream = new MemoryStream(NifArray))
                {
                    using (BinaryReader Reader = new BinaryReader(Stream))
                    {
                        Byte[] Header = Reader.ReadBytes(64);
                        Byte[] Rest = Reader.ReadBytes(Convert.ToInt32(Reader.BaseStream.Length) - 64);

                        using (MemoryStream Stream1 = new MemoryStream())
                        {
                            using (BinaryWriter Writer = new BinaryWriter(Stream1))
                            {
                                String HeaderHex = ByteUtils.BytesToHex(Header);
                                HeaderHex = HeaderHex.Replace("47 61 6D 65 62 72 79 6F", "47 61 6D 65 42 72 79 6F");
                                HeaderHex = HeaderHex.Replace("4E 69 4E 6F 64 65", "4E 69 4E 6F 44 65");

                                Header = ByteUtils.HexToBytes(HeaderHex);

                                Writer.Write(Header);
                                Writer.Write(Rest);
                                Writer.Flush();
                                Writer.Close();
                            }

                            File.WriteAllBytes(FilePath, Stream1.ToArray());
                        }

                    }
                }

                Console.WriteLine(FilePath);
            }

            Console.WriteLine("Done :D");
            Console.ReadLine();
        }
    }
}