using System;
using UnityEngine;
using UnityEngine.Networking;

/*
 * Simple echo server and client
 * For editor or standalone player it supports eiter client and server, for webgl client only supported
 */
public class StWindow : MonoBehaviour {

    private bool _isStarted = false;
    private bool _isServer = false;
    string ip  = "127.0.0.1";
    int   port = 7075;

    private int m_ConnectionId = 0;
    private int m_WebSocketHostId = 0;
    private int m_GenericHostId = 0;

    private ConnectionConfig m_Config = null;
    private byte m_CommunicationChannel = 0;

    private int maxReceivedPing = 0, minReceivedPing = int.MaxValue, lastReceivedPing = 0;

    void Start()
    {
        m_Config = new ConnectionConfig();                                         //create configuration containing one reliable channel
        m_CommunicationChannel = m_Config.AddChannel(QosType.Reliable);
    }

    void OnGUI () {
        GUI.Box(new Rect(5, 5, 450, 450), "window");
        if( !_isStarted )
        {
            ip = GUI.TextField(new Rect(10, 10, 250, 30), ip, 25);
            port = Convert.ToInt32( GUI.TextField(new Rect(10, 40, 250, 30), port.ToString(), 25) );
#if !(UNITY_WEBGL && !UNITY_EDITOR)
            if ( GUI.Button( new Rect(10, 70, 250, 30), "start server" ) )
            {
                _isStarted = true;
                _isServer = true;
                NetworkTransport.Init();

                HostTopology topology = new HostTopology(m_Config, 12);
                m_WebSocketHostId = NetworkTransport.AddWebsocketHost(topology, port, null);           //add 2 host one for udp another for websocket, as websocket works via tcp we can do this
                m_GenericHostId = NetworkTransport.AddHost(topology, port, null);
            }
#endif
            if (GUI.Button(new Rect(10, 100, 250, 30), "start client"))
            {
                _isStarted = true;
                _isServer = false;
                NetworkTransport.Init();

                HostTopology topology = new HostTopology(m_Config, 12);
                m_GenericHostId = NetworkTransport.AddHost(topology, 0); //any port for udp client, for websocket second parameter is ignored, as webgl based game can be client only
                byte error;
                m_ConnectionId = NetworkTransport.Connect(m_GenericHostId, ip, port, 0, out error);
            }
        }
        else
        {
            GUI.Label(new Rect(10, 20, 250, 500), "Min: " + minReceivedPing);
            GUI.Label(new Rect(10, 40, 250, 500), "Max: " + maxReceivedPing);
            GUI.Label(new Rect(10, 60, 250, 500), "Last: " + lastReceivedPing);
            if (GUI.Button(new Rect(10, 120, 250, 50), "stop"))
            {
                _isStarted = false;
                NetworkTransport.Shutdown();
            }
        }
    }

    void Update()
    {
        if (!_isStarted)
            return;
        int recHostId;
        int connectionId;
        int channelId;
        byte[] recBuffer = new byte[1024];
        int bufferSize = 1024;
        int dataSize;
        byte error;

        NetworkEventType recData = NetworkTransport.Receive(out recHostId, out connectionId, out channelId, recBuffer, bufferSize, out dataSize, out error);
        if(error != 0)
        {
            Debug.Log ((NetworkError)error + " " + dataSize + " ");
            return;
        }
        switch (recData)
        {

        case NetworkEventType.ConnectEvent:
        {
            if (!_isServer)
            {
                int networkTime = NetworkTransport.GetNetworkTimestamp();
                byte[] bytes = System.BitConverter.GetBytes(networkTime);

                NetworkTransport.Send(recHostId, connectionId, m_CommunicationChannel, bytes, bytes.Length, out error);     //when client received connection signal it starts send echo
            }
            Debug.Log(String.Format("Connect from host {0} connection {1}", recHostId, connectionId));
            break;
        }

        case NetworkEventType.DataEvent:  //if server will receive echo it will send it back to client, when client will receive echo from serve wit will send other message
        {
            Debug.Log(String.Format("Received event host {0} connection {1} channel {2} message length {3}", recHostId, connectionId, channelId, dataSize));

            int receivedTimestamp = System.BitConverter.ToInt32(recBuffer, 0);
            lastReceivedPing = NetworkTransport.GetRemoteDelayTimeMS(recHostId, connectionId, receivedTimestamp, out error);
            if(error != 0)
                Debug.Log ((NetworkError)error);
            else
            {
                if(lastReceivedPing < minReceivedPing)
                    minReceivedPing = lastReceivedPing;
                if(lastReceivedPing > maxReceivedPing)
                    maxReceivedPing = lastReceivedPing;
            }


            int networkTime = NetworkTransport.GetNetworkTimestamp();
            byte[] bytes = System.BitConverter.GetBytes(networkTime);

            NetworkTransport.Send(recHostId, connectionId, m_CommunicationChannel, bytes, bytes.Length, out error);
            if(error != 0)
                Debug.Log ((NetworkError)error);
        }
            break;
        case NetworkEventType.DisconnectEvent:
        {
            Debug.Log(String.Format("DisConnect from host {0} connection {1}", recHostId, connectionId));
            break;
        }
        }
    }
}