using System;
using System.Net.WebSockets;
using System.Threading;
using System.Threading.Tasks;
using SafeMobileLib.WebsocketClient;
using SafeMobileLib;
using System.ComponentModel;

namespace AppServer
{
    public class WebsocketThread
    {

        private static readonly ManualResetEvent ExitEvent = new ManualResetEvent(false);
        private static readonly object padlock = new object();
        private static WebsocketThread instance = null;

        public String host = "wss://www.bitmex.com/realtime";

        private WebsocketThread() {
        }

        public static WebsocketThread Instance
        {
            get
            {
                lock(padlock)
                {
                    if (instance == null)
                        instance = new WebsocketThread();
                    return instance;
                }
            }
        }
        public static IWebsocketClient _client;

        public IWebsocketClient getClient()
        {
            return _client;
        }

        public void StartWebsocket()
        {
            StartWebsocket(this, null);
        }

        public void StartWebsocket(object sender, DoWorkEventArgs e)
        {
            try { 

                Utils.WriteLine("|=======================|");
                Utils.WriteLine("|    WEBSOCKET CLIENT   |");
                Utils.WriteLine("|=======================|");
                Utils.WriteLine("");
                
                AppDomain.CurrentDomain.ProcessExit += CurrentDomainOnProcessExit;
                Console.CancelKeyPress += ConsoleOnCancelKeyPress;
                

                var factory = new Func<ClientWebSocket>(() =>
                {
                    var client = new ClientWebSocket
                    {
                        Options =
                        {
                        KeepAliveInterval = TimeSpan.FromSeconds(5),
                            // Proxy = ...
                            // ClientCertificates = ...
                        }
                    };
                    return client;
                });

                var url = new Uri(host);

                using (IWebsocketClient client = new WebsocketClient(url, factory))
                {
                    client.Name = Program.COMPANY;
                    client.ReconnectTimeout = TimeSpan.FromSeconds(30);
                    client.ErrorReconnectTimeout = TimeSpan.FromSeconds(30);
                    client.ReconnectionHappened.Subscribe(type =>
                    {
                        Utils.WriteLine($"Reconnection happened, type: {type}, url: {client.Url}");
                    });
                    client.DisconnectionHappened.Subscribe(info =>
                        Utils.WriteLine($"Disconnection happened, type: {info.Type}"));

                    client.MessageReceived.Subscribe(msg =>
                    {
                    });

                    Utils.WriteLine("Starting...");
                    client.Start().Wait();
                    Utils.WriteLine("Started.");

                    _client = client;

                    Task.Run(() => StartSendingPing(client));

                    ExitEvent.WaitOne();
                }

                Utils.WriteLine("====================================");
                Utils.WriteLine("              STOPPING              ");
                Utils.WriteLine("====================================");
            }
            catch (Exception ex)
            {
                Utils.WriteLine("StartWebsocket Exception: " + ex.ToString(), ConsoleColor.Red);
            }
        }

        private static void CurrentDomainOnProcessExit(object sender, EventArgs eventArgs)
        {
            Utils.WriteLine("Exiting process");
            ExitEvent.Set();
        }


        private static void ConsoleOnCancelKeyPress(object sender, ConsoleCancelEventArgs e)
        {
            Utils.WriteLine("Canceling process");
            e.Cancel = true;
            ExitEvent.Set();
        }

        private static async Task StartSendingPing(IWebsocketClient client)
        {
            while (true)
            {
                await Task.Delay(2000);

                if (!client.IsRunning)
                    continue;

                client.Send("ping");
            }
        }

        public static void SendJson(IWebsocketClient client, string json)
        {
            if (!client.IsRunning)
                return;

            //Console.WriteLine("DDDDDDDD: " + json);

            client.Send(json);
        }
        
    }
}