using ConsoleChatServer;
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

namespace RockPaperScissorsClient
{
    internal class Client
    {
        // Attributes
        static Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        const int PORT = 19000;
        const String URL = "server.allcatsaregrey.co.uk";
        static IPAddress ip = IPSorter.FindIPv4Address(URL);
        static IPEndPoint endPoint = new IPEndPoint(ip, PORT);

        static void Main(string[] args)
        {
            Console.WriteLine("Starting client...");

            // Connects to the server
            try
            {
                socket.Connect(endPoint);
                Console.WriteLine("Connected to server.");
            }
            catch (SocketException e)
            {
                Console.WriteLine($"Failed to connect to server: {e.Message}");
                Environment.Exit(0);
            }

            // Asks the user for their name
            Console.Write("Enter your name: ");
            String name = Console.ReadLine();

            // Sends the user's name to the server
            byte[] nameBuffer = Encoding.ASCII.GetBytes(name);
            socket.Send(nameBuffer, SocketFlags.None);

            // Asks for the users choice
            Console.Write("Choose your answer: (rock/paper/scissors) ");
            String choice = Console.ReadLine();

            // Sends their choice to the server
            byte[] choiceBuffer = Encoding.ASCII.GetBytes(choice);
            socket.Send(choiceBuffer, SocketFlags.None);

            // Receives the server's choice
            byte[] serverChoiceBuffer = new byte[1024];
            int serverChoiceReceived = socket.Receive(serverChoiceBuffer, SocketFlags.None);
            char[] serverChoiceChars = new char[serverChoiceReceived];
            Decoder d = Encoding.UTF8.GetDecoder();
            int serverChoiceCharLength = d.GetChars(serverChoiceBuffer, 0, serverChoiceReceived, serverChoiceChars, 0);
            String serverChoice = new string(serverChoiceChars);

            Console.WriteLine($"Server has chosen {serverChoice}.");

            // Determine winner
            if (choice == serverChoice || serverChoice == choice)
            {
                Console.WriteLine("Tied.");
            }
            else if (choice == "rock" && serverChoice == "scissors" ||
                     choice == "paper" && serverChoice == "rock" ||
                     choice == "scissors" && serverChoice == "paper")
            {
                Console.WriteLine($"{name} has won.");
            }
            else
            {
                Console.WriteLine("Server has won.");
            }

            Console.WriteLine("Press any key to exit.");
            Console.ReadKey();
        }
    }
}