using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net.Sockets;
using System.Net;
using System.Runtime.CompilerServices;

namespace Client
{
    internal class Program
    {
        // Attributes
        // Port Number of the server.
        public const int PORT_NUMBER = 19000;
        // Define the buffer size.
        public const int BUFFER_SIZE = 100;
        // Server host name.
        public const string HOST_NAME = "localhost";

        /// <summary>
        /// Main Method of code for the client.
        /// </summary>
        /// <param name="args"(unused)></param>

        static void Main(string[] args)
        {
            // Establish a TCP Client (this is reliable).
            TcpClient client = new TcpClient();

            // Create an IP end point - this allows for the client to connect to the server.
            IPAddress myIP = Dns.GetHostAddresses(HOST_NAME)[0];
            IPEndPoint remoteEndPoint = new IPEndPoint(myIP, PORT_NUMBER);

            // Asks the user to input their name. 
            Console.Write("Please enter your name: ");
            // Display the foreground colour as white.
            Console.ForegroundColor = ConsoleColor.White;
            // Store the clients name into a string. 
            string clientName = Console.ReadLine();

            // Method to connect the client to the server.
            client.Connect(remoteEndPoint);

            // When the client has connected to the server, a message is presented to alert them that it was successful. 
            Console.WriteLine($"{clientName} Sucessfully connected to the server!");

            // Network stream - send and recieve data. 
            NetworkStream stream = client.GetStream();

            // Message is buffered.
            byte[] buffer = new byte[BUFFER_SIZE];
            int bytesRead = stream.Read(buffer, 0, buffer.Length);
            string message = Encoding.ASCII.GetString(buffer, 0, bytesRead);
            Console.WriteLine("Received message: " + message);

            // The while loop is used to allow the user to provide guesses of the number.
            while (true)
            {
                // Allows the user to make a guess as to what the number will be.
                Console.Write("Please provide a guess: ");
                // The guess is then stored in a string named 'guess' which is then encoded and sent to the server.
                string guess = Console.ReadLine();
                // The guess that is stored in the string is then send to the server.
                byte[] guessBytes = Encoding.ASCII.GetBytes(guess);
                stream.Write(guessBytes, 0, guessBytes.Length);
                bytesRead = stream.Read(buffer, 0, buffer.Length);
                message = Encoding.ASCII.GetString(buffer, 0, bytesRead);
                Console.WriteLine("Message was recieved: " + message);
                if (message == "Correct! You win!")
                {
                    // When the game has finished this message will show.
                    Console.WriteLine("Please press any key to quit.");
                    // When a key is pressed, the application will close.
                    Console.ReadKey();
                    break;
                }
            }
        }
    }
}