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using System;
using System.IO;
using System.Net;
using System.Net.Sockets;


namespace GisClient
{
    class EntryPoint
    {
        static void Main()
        {
            TcpClient TcpCli = new TcpClient("127.0.0.1", 15800);
            NetworkStream ns = TcpCli.GetStream();
            
            PacketStructure obj = new PacketStructure();
            obj.CommandOptions = 0x80; //What's this shit??? 0x80 , what's Encoding??? What 0x80 equals to?

            obj.Write2Net(ns);
            obj.ReadFromNet(ns);
        }
    }

    class PacketStructure
    {
        UInt32 PacketId = 0x35534947;
        Guid UserId = new Guid();
        
        public byte CommandOptions = 0;
        UInt32 CommandSize = 0;

        byte[] Reserved = new byte[3];


        public void Write2BufferStream(MemoryStream ms)
        {
            //PacketId || Length - 4 || Type - UInt32
            ms.Write(BitConverter.GetBytes(PacketId), 0, 4);
            //UserId || Length - 16 || Type - byte[16]
            ms.Write(UserId.ToByteArray(), 0, 16);
            //Command Options || Length - 1 || byte
            ms.Write(BitConverter.GetBytes(CommandOptions), 0, 1);
            //Command Size || Length - 4 || Int32
            ms.Write(BitConverter.GetBytes(CommandSize), 0, 4);
            //Reserved space || Length - 3 || byte[3]
            ms.Write(Reserved, 0, 3);
            //CRC32 - control summary
            ms.Write(BitConverter.GetBytes(CRC32.BytesCrc(ms.ToArray())), 0, 4);
        }

        public void Write2Net(NetworkStream ns)
        {
            MemoryStream ms = new MemoryStream();

            Write2BufferStream(ms);

            byte[] A = ms.ToArray();
            ns.Write(A, 0, (int)ns.Length);
        }

        public void ReadFromNet(NetworkStream ns)
        {
            byte[] B = new byte[32];

            ns.Read(B, 0, (int)ns.Length);

            PacketId = BitConverter.ToUInt32(B, 0); //??????? lolwhat?????!!!!!111

            byte[] C = new byte[16];

            for (int i = 0; i < 16; i++)
            {
                C[i] = C[i + 4];
            }

            foreach (int i in C)
            {
                Console.WriteLine(i);
                Console.ReadLine();
            }

            UserId = new Guid(C);

            CommandOptions = B[20]; // Why no BitConverter?????!!!!!

            CommandSize = BitConverter.ToUInt32(B, 21); // The end of CommandSize IS NOT SET!!!!1111

            for (int i = 0; i < 3; i++) Reserved[i] = B[i + 25]; // A[0] = Packet[0 + 25] IF i = 0 THEN i++

            Console.ReadLine();
        }

    }
}