using Microsoft.AspNetCore.SignalR.Client;
using Microsoft.Extensions.DependencyInjection;
using Remotely_Shared.Models;
using Remotely_ScreenCast.Core.Enums;
using Remotely_ScreenCast.Core.Input;
using Remotely_ScreenCast.Core.Models;
using Remotely_ScreenCast.Core.Sockets;
using Remotely_ScreenCast.Core.Utilities;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Remotely_ScreenCast.Core
{
    public class Conductor
    {
        public event EventHandler<ScreenCastRequest> ScreenCastInitiated;

        public event EventHandler<ScreenCastRequest> ScreenCastRequested;

        public event EventHandler<string> SessionIDChanged;

        public event EventHandler<Viewer> ViewerAdded;

        public event EventHandler<string> ViewerRemoved;

        public Dictionary<string, string> ArgDict { get; set; }
        public HubConnection Connection { get; private set; }
        public string CurrentDesktopName { get; set; }
        public string Host { get; private set; }
        public AppMode Mode { get; private set; }
        public CasterSocket CasterSocket { get; private set; }
        public string RequesterID { get; private set; }
        public string ServiceID { get; private set; }
        public ConcurrentDictionary<string, Viewer> Viewers { get; } = new ConcurrentDictionary<string, Viewer>();
        public Task Connect()
        {
            Connection = new HubConnectionBuilder()
                .WithUrl($"{Host}/RCDeviceHub")
                .AddMessagePackProtocol()
                .Build();

            return Connection.StartAsync();
        }

        public void ProcessArgs(string[] args)
        {
            ArgDict = new Dictionary<string, string>();

            for (var i = 0; i < args.Length; i += 2)
            {
                var key = args?[i];
                if (key != null)
                {
                    key = key.Trim().Replace("-", "").ToLower();
                    var value = args?[i + 1];
                    if (value != null)
                    {
                        ArgDict[key] = args[i + 1].Trim();
                    }
                }

            }

            Mode = (AppMode)Enum.Parse(typeof(AppMode), ArgDict["mode"]);
            Host = ArgDict["host"];

            if (Mode == AppMode.Unattended)
            {
                RequesterID = ArgDict["requester"];
                CurrentDesktopName = ArgDict["desktop"];
                ServiceID = ArgDict["serviceid"];
            }
        }

        public void SetMessageHandlers(IKeyboardMouseInput keyboardMouse)
        {
            CasterSocket = new CasterSocket(Connection, this, keyboardMouse);
        }

        public void StartWaitForViewerTimer()
        {
            var timer = new System.Timers.Timer(10000);
            timer.AutoReset = false;
            timer.Elapsed += (sender, arg) =>
            {
                // Shut down if no viewers have connected within 10 seconds.
                if (Viewers.Count == 0)
                {
                    Logger.Write("No viewers connected after 10 seconds.  Shutting down.");
                    Environment.Exit(0);
                }
            };
            timer.Start();
        }

        internal void InvokeScreenCastInitiated(ScreenCastRequest viewerIdAndRequesterName)
        {
            ScreenCastInitiated?.Invoke(null, viewerIdAndRequesterName);
        }
        internal void InvokeScreenCastRequested(ScreenCastRequest viewerIdAndRequesterName)
        {
            ScreenCastRequested?.Invoke(null, viewerIdAndRequesterName);
        }
        internal void InvokeSessionIDChanged(string sessionID)
        {
            SessionIDChanged?.Invoke(null, sessionID);
        }

        internal void InvokeViewerAdded(Viewer viewer)
        {
            ViewerAdded?.Invoke(null, viewer);
        }
        internal void InvokeViewerRemoved(string viewerID)
        {
            ViewerRemoved?.Invoke(null, viewerID);
        }
    }
}