using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.IO;

namespace chat_server
{
    public partial class Form1 : Form
    {
        private Random rnd = new Random();
        TcpListener lyssnare;
        TcpClient[] client = new TcpClient[24];
        User[] klient = new User[24];
        int port = 12345;
        int antalklienter = 0;
        int antaladmins = 0;

        public Form1()
        {
            InitializeComponent();
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            try
            {
                lyssnare = new TcpListener(IPAddress.Any, port);
                lyssnare.Start();
            }
            catch (Exception error) { MessageBox.Show(error.Message, Text); return; }

            btnStart.Enabled = false;
            StartaMottagning();
        }

        public async void StartaMottagning()
        {
            try
            {
                Color randomColor = Color.FromArgb(rnd.Next(256), rnd.Next(256), rnd.Next(256));
                klient[antalklienter] = new StandardUser(antalklienter.ToString(), "123", IPAddress.Any, randomColor);
                klient[antalklienter].client = await lyssnare.AcceptTcpClientAsync();
            }
            catch (Exception error) { MessageBox.Show(error.Message, Text); return; }

            StartaLäsning(klient[antalklienter].getClient());
            tbxLog.AppendText(klient[antalklienter].getClient().Client.RemoteEndPoint.ToString() + " Connected! \n");
            antalklienter++;
            StartaMottagning();
        }

        public async void StartaLäsning(TcpClient k)
        {
            byte[] buffert = new byte[1024];

            int n = 0;

            try
            {
                n = await k.GetStream().ReadAsync(buffert, 0, buffert.Length);
            }
            catch (Exception error) { MessageBox.Show(error.Message, Text); return; }
            if (Encoding.Unicode.GetString(buffert, 0, n)[0] == '4')
            {
                TcpClient tempclient = klient[antalklienter].client;
                klient[antalklienter] = new Admin(klient[antalklienter].getAlias(), klient[antalklienter].getPassword(), klient[antalklienter].getIP(), klient[antalklienter].getColor(), true, true, true);
                klient[antalklienter].client = tempclient;
            }

            string ifadmin = "";

            try
            {
                if (Encoding.Unicode.GetString(buffert, 0, n)[0] == '4')
                {
                    ifadmin = "ADMIN  :";
                }
            }
            catch (Exception error) { return; }

            int aliasPos = Encoding.Unicode.GetString(buffert, 0, n).IndexOf("1337", 0);
            string alias = Encoding.Unicode.GetString(buffert, 0, n).Substring(1, aliasPos - 1);
            string chatt = File.ReadAllText(@"C:\Users\hamjoh64\Documents\Visual Studio 2015\Projects\Programmering2\chat-server\bin\Debug\log.txt");
            string newLine = ifadmin + alias + ": " + Encoding.Unicode.GetString(buffert, 0, n).Substring(alias.Length + 4) + Environment.NewLine;
            File.AppendAllText(@"C:\Users\hamjoh64\Documents\Visual Studio 2015\Projects\Programmering2\chat-server\bin\Debug\log.txt", newLine);
            chatt = File.ReadAllText(@"C:\Users\hamjoh64\Documents\Visual Studio 2015\Projects\Programmering2\chat-server\bin\Debug\log.txt");
            tbxLog.AppendText(ifadmin + alias + ": ");
            tbxLog.AppendText( Encoding.Unicode.GetString(buffert, 0, n).Substring(alias.Length + 4) + "\n");
            StartaSändning(File.ReadAllText(@"C:\Users\hamjoh64\Documents\Visual Studio 2015\Projects\Programmering2\chat-server\bin\Debug\log.txt"), k, ifadmin);
            StartaLäsning(k);
        }

        public async void StartaSändning(string message, TcpClient k, string ifadmin)
        {
            byte[] utData = Encoding.Unicode.GetBytes(ifadmin + message);

            try
            {
                await k.GetStream().WriteAsync(utData, 0, utData.Length);
            }
            catch (Exception error) { MessageBox.Show(error.Message, Text); return; }


        }

        private void btnFlush_Click(object sender, EventArgs e)
        {
            File.WriteAllText(@"C:\Users\hamjoh64\Documents\Visual Studio 2015\Projects\Programmering2\chat-server\bin\Debug\log.txt", "");
        }
    }

    abstract class User
    {
        protected string name;
        protected string password;
        protected IPAddress ip;
        public TcpClient client;
        protected Color color;

        public User(string name, string password, IPAddress ip, Color color)
        {
            this.name = name;
            this.password = password;
            this.ip = ip;
            this.color = color;
        }

        public IPAddress getIP()
        {
            return ip;
        }

        public TcpClient getClient()
        {
            return client;
        }

        public string getAlias()
        {
            return name;
        }

        public Color getColor()
        {
            return color;
        }

        public string getPassword()
        {
            return password;
        }


        protected void kick()
        {

        }

        protected void ban(string reason)
        {
            kick();

        }

        protected void unBan()
        {

        }

        protected void directMessage(string message)
        {

        }
    }

    class StandardUser : User
    {

        public StandardUser(string name, string password, IPAddress ip, Color color) : base(name, password, ip, color)
        {

        }
    }

    class Admin : User
    {
        protected bool canKick;
        protected bool canBan;
        protected bool canRename;
        public Admin(string name, string password, IPAddress ip, Color color, bool canKick, bool canBan, bool canRename) : base(name, password, ip, color)
        {
            this.canKick = canKick;
            this.canBan = canBan;
            this.canRename = canRename;
        }
    }
}