using System.ComponentModel;
using System.Windows.Media;
using TeamsLocalLibary.EventArgs;
using TeamsNetphoneLink.Teams;
using TeamsNetphoneLink.Netphone;
using TeamsNetphoneLink.WPF.MVVM;
using TeamsNetphoneLink.Communication;
using System.Reflection;
using TeamsNetphoneLink.WPF;

namespace TeamsNetphoneLink
{
    public class Syncronisation
    {
        public NetPhoneEvents NetphoneEvents { get; set; }
        public TeamsGraph TeamsGraph { get; set; }
        public TeamsLocalAPI TeamsEvents { get; set; }

        //MVVM View Models
        public DashboardViewModel _dashboardViewModel { get; }
        public LogViewModel LogEntries { get; }
        public FinishPanelViewModel FinishPanelViewModel { get; }

        public readonly SemaphoreSlim TeamsGraphAuthenticationSemaphore = new(1);
        
        private bool _isCallActive = false;
        private bool _isMeetingActive = false;
        private bool NetphoneConnected = false;


        public Syncronisation(NetPhoneEvents netPhoneEvents, TeamsLocalAPI teamsEvents, TeamsGraph teamsGraph, DashboardViewModel dashboardViewModel, LogViewModel logEntries, FinishPanelViewModel finishPanelViewModel)
        {
            _dashboardViewModel = dashboardViewModel ?? throw new ArgumentNullException(nameof(dashboardViewModel));
            LogEntries = logEntries ?? throw new ArgumentNullException(nameof(logEntries));
            FinishPanelViewModel = finishPanelViewModel ?? throw new ArgumentNullException(nameof(finishPanelViewModel));
            NetphoneEvents = netPhoneEvents ?? throw new ArgumentNullException(nameof(netPhoneEvents));
            TeamsEvents = teamsEvents ?? throw new ArgumentNullException(nameof(teamsEvents));
            TeamsGraph = teamsGraph ?? throw new ArgumentNullException(nameof(teamsGraph));

            // Event-Handler für Netphone-Events registrieren
            NetphoneEvents.AddLineStateEventHandler(LineState.Dialing, NetphoneEventCall);
            NetphoneEvents.AddLineStateEventHandler(LineState.Ringing, NetphoneEventCall);
            NetphoneEvents.AddLineStateEventHandler(LineState.Active, NetphoneEventCall);
            NetphoneEvents.AddLineStateEventHandler(LineState.Inactive, NetphoneEventTerminated);
            NetphoneEvents.AddLineStateEventHandler(LineState.Terminated, NetphoneEventTerminated);
            NetphoneEvents.AddLoggedInStateEventHandler(NetphoneOnLoggedInStateChanged);

            if (!Settings.Default.UseGraphForMeetingState)
            {
                // Event-Handler für Teams-Events registrieren
                TeamsEvents.AddEventHandler("IsInMeeting", TeamsIsInMeetingHandler);
                TeamsEvents.AddConnectionStateHandler(TeamsOnConnectionStateChanged);
                TeamsEvents.AddTokenRecievedHandler(TeamsTokenRecievedHandler);
            }
            else
            {
                TeamsGraph.ActivityChanged += TeamsGraphOnActivityChanged;
                _dashboardViewModel.UpdateStatusPanel(StatusPanelNames.TeamsLocalAPIStatus, Colors.Orange, "Deaktiviert");
            }
        }

        // Event-Handler für Änderungen des Verbindungsstatus in Teams
        private void TeamsOnConnectionStateChanged(object? sender, ConnectionStateChangedEventArgs args)
        {
            var status = args.WebSocketState switch
            {
                System.Net.WebSockets.WebSocketState.Open when Settings.Default.TeamsPermission => (Colors.Green, "Verbunden"),
                System.Net.WebSockets.WebSocketState.Open => (Colors.Orange, "Authorisieren (Klicken)"),
                System.Net.WebSockets.WebSocketState.Connecting => (Colors.Blue, "Verbinden..."),
                System.Net.WebSockets.WebSocketState.Closed => (Colors.Red, "Nicht verbunden"),
                _ => (Colors.Gray, "Unbekannt")
            };

            _dashboardViewModel.UpdateStatusPanel(StatusPanelNames.TeamsLocalAPIStatus, status.Item1, status.Item2);

            if(Settings.Default.TeamsPermission)
                LogEntries.AddLogEntry(args.WebSocketState == System.Net.WebSockets.WebSocketState.Open ? "Info" : "Warn", "TeamsLocalAPI", status.Item2);
        }

        private void NetphoneOnLoggedInStateChanged(bool isLoggedIn)
        {
            NetphoneConnected = isLoggedIn;

            var state = isLoggedIn ? ( Colors.Green, "Verbunden" ) : ( Colors.Red, "Nicht verbunden" );

            _dashboardViewModel.UpdateStatusPanel(StatusPanelNames.NetphoneCLMGRStatus, state.Item1, state.Item2);
            LogEntries.AddLogEntry(isLoggedIn ? "Info" : "Warn", "Netphone", state.Item2);
        }

        // Event-Handler für den Empfang eines Teams-Tokens
        private void TeamsTokenRecievedHandler(object sender, TokenReceivedEventArgs e)
        {
            if (!Settings.Default.TeamsPermission)
            {
                Settings.Default.TeamsPermission = true;
                Settings.Default.Save();
                
                FinishPanelViewModel.FinishPanelEffect = null;
                FinishPanelViewModel.FinishPanelEnabled = true;
                FinishPanelViewModel.FinishPanelFinishTextText = "Verbindung erfolgreich";
                FinishPanelViewModel.SetFinishPanelFinishTextColor(Colors.Green);

                _dashboardViewModel.UpdateStatusPanel(StatusPanelNames.TeamsLocalAPIStatus, Colors.Green, "Verbunden");
                LogEntries.AddLogEntry("TeamsLocalAPI", "Token erfolgreich abgerufen");
            }
        }

        // Event-Handler für eingehende Anrufe
        private async void NetphoneEventCall(LineState newLineState)
        {
            if (_isCallActive) return;

            _isCallActive = true;
            await TeamsGraph.SetPresenceAsync(TeamsGraph.PresenceState.Busy);
            _dashboardViewModel.UpdateStatusPanel(StatusPanelNames.NetphoneCallStatus, Colors.DarkGreen, "Ongoing");
            LogEntries.AddLogEntry("Syncronisation", "Netphone Anruf gestartet");
        }

        // Event-Handler für beendete Anrufe
        private async void NetphoneEventTerminated(LineState newLineState)
        {
            if (!_isCallActive) return;

            _isCallActive = false;
            await TeamsGraph.SetPresenceAsync(TeamsGraph.PresenceState.Available);
            _dashboardViewModel.UpdateStatusPanel(StatusPanelNames.NetphoneCallStatus, Colors.DarkOrange, "Not active");
            LogEntries.AddLogEntry("Syncronisation", "Netphone Anruf gestoppt");
        }


        private void TeamsGraphOnActivityChanged(object sender, PresenceChangedEventArgs args)
        {
            // Define activities that indicate the user is in a meeting
            var meetingActivities = new HashSet<string>
            {
                "InACall",
                "InAConferenceCall",
                "InAMeeting",
                "Presenting"
            };

            if(args.Presence.Activity is null)
                return;

            // Check if the current activity is in the meetingActivities set
            bool isInMeeting = meetingActivities.Contains(args.Presence.Activity);


            if (!isInMeeting && _isMeetingActive)
            {
                _isMeetingActive = false;
                SetNetphoneStatus(isInMeeting);
                return;
            }

            if (isInMeeting && !_isMeetingActive)
            {
                _isMeetingActive = true;
                SetNetphoneStatus(isInMeeting);
            }
        }

        // Event-Handler für Änderungen des "IsInMeeting"-Status in Teams
        private void TeamsIsInMeetingHandler(object sender, PropertyChangedEventArgs e)
        {
            var isInMeeting = (bool)(sender.GetType()?.GetProperty(e.PropertyName)?.GetValue(sender) ?? false);
            SetNetphoneStatus(isInMeeting);
        }

        private void SetNetphoneStatus(bool meeting)
        {
            if (meeting)
            {
                if (NetphoneConnected)
                {
                    NetphoneEvents.SetRichPresenceStatus(0, 1, DateTime.MaxValue);
                    NetphoneEvents.SetAppointmentText("In einem Teams Meeting", DateTime.MaxValue);
                }
                _dashboardViewModel.UpdateStatusPanel(StatusPanelNames.TeamsMeetingStatus, Colors.DarkGreen, "Ongoing");
                LogEntries.AddLogEntry("Syncronisation", "Teams Meeting gestartet");
            }
            else
            {
                if (NetphoneConnected)
                {
                    NetphoneEvents.SetRichPresenceStatus(0, 0, DateTime.MaxValue);
                    NetphoneEvents.SetAppointmentText("", DateTime.MaxValue);
                }
                _dashboardViewModel.UpdateStatusPanel(StatusPanelNames.TeamsMeetingStatus, Colors.DarkOrange, "Not active");
                LogEntries.AddLogEntry("Syncronisation", "Teams Meeting gestoppt");
            }
        }



        // Methode zur Authentifizierung bei der Graph API
        public async Task<bool> GraphAuthenticate(bool clearCache = false)
        {
            _dashboardViewModel.UpdateStatusPanel(StatusPanelNames.TeamsGraphAPIStatus, Colors.Blue, "Anmeldung läuft...");
            LogEntries.AddLogEntry("TeamsGraphAPI", String.Format("Anmeldung läuft"));

            var authResult = await TeamsGraph.AuthenticateAsync(clearCache);

            var status = authResult ? (Colors.Green, "Angemeldet") : (Colors.Red, "Fehler - Anmelden (Klicken)");
            _dashboardViewModel.UpdateStatusPanel(StatusPanelNames.TeamsGraphAPIStatus, status.Item1, status.Item2);
            LogEntries.AddLogEntry("TeamsGraphAPI", status.Item2);

            return authResult;
        }

        public async void InitializeNetphoneAsync()
        {
            try
            {
                await this.NetphoneEvents.Initialize(waitForNetphone: true).ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                // Fehlerbehandlung für die Netphone-Initialisierung
                ExceptionWindowHelper.Show(this.GetType().Name, MethodBase.GetCurrentMethod().Name, "Fehler bei der Initialisierung von der NetphoneAPI", ex.Message, ex.StackTrace);
            }
        }

        public async void InitializeTeamsGraphAsync()
        {
            if (!Teams.TeamsGraph.IsGuid(Settings.Default.AppID) || !Teams.TeamsGraph.IsGuid(Settings.Default.TenantID))
            {
                this._dashboardViewModel.UpdateStatusPanel(StatusPanelNames.TeamsGraphAPIStatus, Colors.Red, "Konfiguration fehlt");
                return;
            }

            try
            {
                await this.TeamsGraphAuthenticationSemaphore.WaitAsync().ConfigureAwait(false);
                if (await this.TeamsGraph.IsCachedAccounts() && Settings.Default.SaveEntraCredentials)
                {
                    await this.GraphAuthenticate().ConfigureAwait(false); ;
                }
                else
                {
                    this._dashboardViewModel.UpdateStatusPanel(StatusPanelNames.TeamsGraphAPIStatus, Colors.Orange, "Anmelden");
                }
                this.TeamsGraphAuthenticationSemaphore.Release();

                if (Settings.Default.UseGraphForMeetingState)
                {
                    this.TeamsGraph.CheckPresenceStatusTimer();
                }
            }
            catch (Exception ex)
            {
                // Fehlerbehandlung für die TeamsGraph-Initialisierung
                ExceptionWindowHelper.Show(this.GetType().Name, MethodBase.GetCurrentMethod().Name, "Fehler bei der Initialisierung von TeamsGraph", ex.Message, ex.StackTrace);
            }
        }

        public async void InitializeTeamsLocalAPIAsync()
        {
            if (!Settings.Default.UseGraphForMeetingState)
            {
                try
                {
                    await this.TeamsEvents.Initialize().ConfigureAwait(false);
                }
                catch (Exception ex)
                {
                    // Fehlerbehandlung für die TeamsLocalAPI-Initialisierung
                    ExceptionWindowHelper.Show(this.GetType().Name, MethodBase.GetCurrentMethod().Name, "Fehler bei der Initialisierung von der TeamsLocalAPI", ex.Message, ex.StackTrace);
                }
            }
        }
    }
}