using Logger;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Net.Sockets;
using System.Threading;
using UnityEngine;

namespace Networkreader
{
    public abstract class AbstractNWReader
    {
        /// <summary>
        /// The IPAdress of the tcp Server.
        /// </summary>
        protected string IpAdress { get; set; }

        /// <summary>
        /// The port of the tcp Server.
        /// </summary>
        protected int Port { get; set; }

        /// <summary>
        /// The instance of the <see cref="TcpClient"/> connected to <see cref="IpAdress"/>:<see cref="Port"/>
        /// </summary>
        protected TcpClient Client { get; set; }

        /// <summary>
        /// The instance of the Network stream used for reading;
        /// </summary>
        protected NetworkStream NWStream{ get; set; }

        /// <summary>
        /// Identifies if the stream is still running or not.
        /// </summary>
        protected bool Streaming { get; set; }

        public AbstractNWReader(string ipAdress, int port)
        {
            this.IpAdress = ipAdress;
            this.Port = port;
        }

        /// <summary>
        /// Writes the data to the underlying file.
        /// </summary>
        /// <param name="filepath">Filepath of the .bin file.</param>
        protected abstract void WriteToFileThread(object filepath);

        /// <summary>
        /// Get the filename the specific readr should write to
        /// </summary>
        protected abstract string GetFilename();

        protected virtual void ReadBuffer(byte[] buffer)
        {
            int alreadyRead = 0;
            while (alreadyRead < buffer.Length)
                alreadyRead += NWStream.Read(buffer, alreadyRead, buffer.Length);
        }

        /// <summary>
        /// Stops the NWReader.
        /// </summary>
        public void StopReading()
        {
            Streaming = false;
        }

        /// <summary>
        /// Start the NW reader,
        /// </summary>
        /// <returns>The filename the data will be written to.</returns>
        public virtual string StartNWRead()
        {
            string filename = GetFilename();
            string filePath = "./Assets/CSVInput/" + filename;
            try
            {
                Client = new TcpClient();
                if (!Client.ConnectAsync(IpAdress, Port).Wait(1000))
                    return "";
                File.Create(filePath).Close();
                Thread th = new Thread(WriteToFileThread);
                th.Start(filePath);
            }
            catch (Exception e)
            {
                CityLogger.LogError("Unable to connect to server or start reading thread. Error: " + e.Message);
                filePath = string.Empty;
            }
            return filename;
        }
    }
}