using System;
using System.Linq;
using System.Net.Sockets;
using System.Text;
using Newtonsoft.Json;

namespace Server
{
    class Client
    {
        private Communication communication;
        private TcpClient tcpClient;
        private NetworkStream stream;
        private byte[] buffer = new byte[1024];
        private byte[] totalBuffer = new byte[1024];
        private int totalBufferReceived = 0;


        public string Username { get; set; }

        public Client(Communication communication, TcpClient tcpClient)
        {
            this.communication = communication;
            this.tcpClient = tcpClient;
            this.stream = this.tcpClient.GetStream();
            stream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(OnRead), null);
        }

        private void OnRead(IAsyncResult ar)
        {
            int receivedBytes = this.stream.EndRead(ar);

            if (totalBufferReceived + receivedBytes > 1024)
            {
                throw new OutOfMemoryException("buffer too small");
            }
            Array.Copy(buffer, 0, totalBuffer, totalBufferReceived, receivedBytes);
            totalBufferReceived += receivedBytes;

            int expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
            while (totalBufferReceived >= expectedMessageLength)
            {
                //volledig packet binnen
                byte[] messageBytes = new byte[expectedMessageLength];
                Array.Copy(totalBuffer, 0, messageBytes, 0, expectedMessageLength);
                HandleData(messageBytes);

                //Array.Copy(totalBuffer, expectedMessageLength, totalBuffer, 0, (totalBufferReceived - expectedMessageLength)); //maybe unsafe idk 
                totalBuffer = totalBuffer.Skip(expectedMessageLength).ToArray();

                totalBufferReceived -= expectedMessageLength;
                expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
            }

            this.stream.BeginRead(this.buffer, 0, this.buffer.Length, new AsyncCallback(OnRead), null);

        }
        /// <summary>
        /// TODO
        /// </summary>
        /// <param name="message">including message length and messageId (can be changed)</param>
        private void HandleData(byte[] message)
        {
            //Console.WriteLine("Data " + packet);
            //JsonConvert.DeserializeObject(packet);
        }
    }
}