using UnityEngine;
using System.Collections;
using UnityEngine.Networking;
using System.Net;
using System.Collections.Generic;
using TanarusNetworkMessages;
using UnityEngine.Networking.NetworkSystem;
public class MasterServer : MonoBehaviour
{
    private IPAddress _ipAddress = null;
    private int _port = 0;

    void Start ()
    {
        Debug.Log("Initializing Tanarus Master Server");
        ParseArgs();
        SetIP();
        SetPort();
        StartServer();
        RegisterEvents();
    }
    private void ParseArgs()
    {
        string[] args = System.Environment.GetCommandLineArgs();
        Debug.Log("Command line: " + args);
        for (var i = 0; i < args.Length; i++)
        {
            switch (args[i])
            {
                case "-ip":
                    if (args.Length == i + 1)
                    {
                        Debug.LogError("IP Address missing from the command line");
                        KillServer();
                    }
                    try
                    {
                        _ipAddress = IPAddress.Parse(args[i + 1]);
                    }
                    catch
                    {
                        Debug.LogError("Invalid IP address specified on the command line");
                        KillServer();
                    }
                    break;
                case "-port":
                    if (args.Length == i + 1)
                    {
                        Debug.LogError("Port missing from the command line");
                        KillServer();
                    }
                    try
                    {
                        _port = System.Int32.Parse(args[i + 1]);
                    }
                    catch
                    {
                        Debug.LogError("Invalid port specified on the command line");
                        KillServer();
                    }
                    break;
            }
        }
    }

    private void SetIP()
    {
        if (_ipAddress == null)
        {
#if UNITY_EDITOR
            _ipAddress = IPAddress.Parse("127.0.0.1");
#else
            IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
            _ipAddress = ipHostInfo.AddressList[0];
#endif
        }
    }

    private void SetPort()
    {
        if (_port == 0)
        {

            _port = Constants.defaultPort;
        }
    }

    private void StartServer()
    {
        try
        {
            if (!NetworkServer.Listen(_ipAddress.ToString(), _port))
            {
                Debug.LogError("Could not establish connection on " + _ipAddress.ToString() + ":" + _port);
                KillServer();
            }
            Debug.Log("Server listening on " + _ipAddress.ToString() + ":" + _port);
        }
        catch
        {
            Debug.LogError("Could not establish connection on " + _ipAddress.ToString() + ":" + _port);
            KillServer();
        }
    }

    private void RegisterEvents()
    {
        NetworkServer.RegisterHandler(MsgType.Connect, PlayerConnected);
        NetworkServer.RegisterHandler(MessageTypes.CheckServerStatus, ServerStatusRequested);
        NetworkServer.RegisterHandler(MessageTypes.CheckClientVersion, ClientVersionRequested);
        NetworkServer.RegisterHandler(MessageTypes.Login, LoginRequested);
    }

    private void PlayerConnected(NetworkMessage msg)
    {
        Debug.Log("Client ID " + msg.conn.connectionId + " connected");
        SendToAllBut(msg.conn, MsgType.Connect, new EmptyMessage());
    }

    private void ServerStatusRequested(NetworkMessage msg)
    {
        NetworkServer.SendToClient(msg.conn.connectionId, MessageTypes.CheckClientVersion, new CheckServerStatus() { status = "online" });
    }

    private void ClientVersionRequested(NetworkMessage msg)
    {
        NetworkServer.SendToClient(msg.conn.connectionId, MessageTypes.CheckClientVersion, new CheckClientVersion() { version = Constants.requiredVersion });
    }

    private void LoginRequested(NetworkMessage msg)
    {
        Login data = msg.ReadMessage<Login>();
        if (data.username == "gadonj18" && data.password == "Password1!")
        {
            NetworkServer.SendToClient(msg.conn.connectionId, MessageTypes.LoginResponse, new LoginResponse() { loginSuccess = true });
        }
        else
        {
            NetworkServer.SendToClient(msg.conn.connectionId, MessageTypes.LoginResponse, new LoginResponse() { loginSuccess = false, errorMessage = "Invalid username and/or password" });
        }
    }

    private void SendToAllBut(NetworkConnection excludedConn, short msgType, MessageBase msg)
    {
        List<NetworkConnection> clients = new List<NetworkConnection>(NetworkServer.connections);
        clients.Remove(excludedConn);
        if (clients.Count > 0)
        {
            foreach (NetworkConnection conn in clients)
            {
                if (conn != null)
                {
                    NetworkServer.SendToClient(conn.connectionId, 1002, msg);
                }
            }
        }
    }

    void OnApplicationQuit()
    {
        KillServer();
    }

    private void KillServer()
    {
        Debug.Log("Server shutting down");
        NetworkServer.Shutdown();
    }
}