using MSFSPopoutPanelManager.FsConnector;
using MSFSPopoutPanelManager.Model;
using MSFSPopoutPanelManager.Provider;
using MSFSPopoutPanelManager.Shared;
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;
using System.Threading;
using System.Windows;

namespace MSFSPopoutPanelManager.WpfApp.ViewModel
{
    public class ApplicationViewModel : INotifyPropertyChanged
    {
        private UserProfileManager _userProfileManager;
        private PanelPopOutManager _panelPopoutManager;
        private SimConnectManager _simConnectManager;

        // Using PropertyChanged.Fody
        public event PropertyChangedEventHandler PropertyChanged;

        public event EventHandler<EventArgs<StatusMessage>> ShowContextMenuBalloonTip;

        public PanelSelectionViewModel PanelSelectionViewModel { get; private set; }

        public PanelConfigurationViewModel PanelConfigurationViewModel { get; private set; }

        public DataStore DataStore { get; set; }

        public int ActiveUserProfileId { get; set; }

        public string ApplicationVersion { get; private set; }

        public WindowState InitialWindowState { get; private set; }

        public StatusMessage StatusMessage { get; set; }

        public bool IsShownPanelConfigurationScreen { get; set; }

        public bool IsShownPanelSelectionScreen { get; set; }

        public bool IsMinimizedAllPanels { get; set; }

        public DelegateCommand RestartCommand => new DelegateCommand(OnRestart, CanExecute);
        public DelegateCommand MinimizeAllPanelsCommand => new DelegateCommand(OnMinimizeAllPanels, CanExecute);
        public DelegateCommand ExitCommand => new DelegateCommand(OnExit, CanExecute);
        public DelegateCommand UserGuideCommand => new DelegateCommand((o) => { DiagnosticManager.OpenOnlineUserGuide(); }, CanExecute);
        public DelegateCommand DownloadLatestReleaseCommand => new DelegateCommand((o) => { DiagnosticManager.OpenOnlineLatestDownload(); }, CanExecute);
        public DelegateCommand UserProfileSelectCommand => new DelegateCommand(OnUserProfileSelected, CanExecute);
        public DelegateCommand ShowPanelCoorOverlayCommand => new DelegateCommand(OnShowPanelCoorOverlay, CanExecute);
        public DelegateCommand StartPopOutCommand => new DelegateCommand(OnStartPopOut, CanExecute);

        public ApplicationViewModel()
        {
            Logger.OnStatusLogged += (sender, e) => { OnStatusMessageLogged(e); };

            DataStore = new DataStore();

            _userProfileManager = new UserProfileManager();

            _simConnectManager = new SimConnectManager();
            _simConnectManager.OnSimConnectDataRefreshed += (sender, e) =>  
            {  
                DataStore.CurrentMsfsPlaneTitle = e.Value.Title;
                DataStore.ElectricalMasterBatteryStatus = e.Value.ElectricalMasterBattery;
            };
            _simConnectManager.OnConnected += (sender, e) => { DataStore.IsSimulatorStarted = true; };
            _simConnectManager.OnDisconnected += (sender, e) => { DataStore.IsSimulatorStarted = false; };

            _panelPopoutManager = new PanelPopOutManager(_userProfileManager, _simConnectManager);
            _panelPopoutManager.OnPopOutCompleted += (sender, e) =>
            {
                Application.Current.Dispatcher.Invoke(() =>
                {
                    if (e.Value)
                    {
                        var messageDialog = new OnScreenMessageDialog("Panels have been popped out succesfully.", MessageIcon.Success);
                        messageDialog.ShowDialog();
                    }
                    else
                    {
                        var messageDialog = new OnScreenMessageDialog("Unable to pop out panels.\nPlease see error message in the app.", MessageIcon.Failed);
                        messageDialog.ShowDialog();
                    }
                });
            };

            PanelSelectionViewModel = new PanelSelectionViewModel(DataStore, _userProfileManager, _panelPopoutManager, _simConnectManager);
            PanelSelectionViewModel.OnPopOutCompleted += (sender, e) => { ShowPanelSelection(false); PanelConfigurationViewModel.Initialize(); };

            PanelConfigurationViewModel = new PanelConfigurationViewModel(DataStore, _userProfileManager);

            InputHookManager.OnStartPopout += (source, e) => { OnStartPopOut(null); };
            InputHookManager.StartHook();
        }

        public void Initialize()
        {
            var appSetting = new AppSetting();
            appSetting.Load();

            DataStore.AppSetting = appSetting;
            DataStore.AppSetting.AlwaysOnTopChanged += OnAlwaysOnTopChanged;
            DataStore.AppSetting.AutoPopOutPanelsChanged += (sender, e) =>
            {
                if (e.Value)
                    ActivateAutoPanelPopOut();
                else
                    DeativateAutoPanelPopOut();
            };

            // Set application version
            ApplicationVersion = DiagnosticManager.GetApplicationVersion();

            // Set window state
            if (DataStore.AppSetting.StartMinimized)
                InitialWindowState = WindowState.Minimized;

            // Set Always on Top
            if (DataStore.AppSetting.AlwaysOnTop)
                OnAlwaysOnTopChanged(this, new EventArgs<bool>(DataStore.AppSetting.AlwaysOnTop));

            // Activate auto pop out panels
            if (DataStore.AppSetting.AutoPopOutPanels)
                ActivateAutoPanelPopOut();

            ShowPanelSelection(true);

            IsMinimizedAllPanels = false;
        }

        private void OnRestart(object commandParameter)
        {
            // Un-minimize all panels if applicable
            if(IsMinimizedAllPanels)
            {
                DataStore.AllowEdit = true;
                IsMinimizedAllPanels = false;
                WindowManager.MinimizeAllPopoutPanels(false);
            }

            // Unhook all win events 
            PanelConfigurationViewModel.UnhookWinEvents();

            // Clear logger
            Logger.ClearStatus();

            // Try to close all Cutome Panel window
            DataStore.ActiveUserProfile.PanelConfigs.ToList().FindAll(p => p.PanelType == PanelType.CustomPopout).ForEach(panel => WindowManager.CloseWindow(panel.PanelHandle));

            // Clear all panel windows handle for active profile
            DataStore.ActiveUserProfile.PanelConfigs.ToList().ForEach(p => p.PanelHandle = IntPtr.Zero);
            ShowPanelSelection(true);
        }

        private void OnExit(object commandParameter)
        {
            InputHookManager.EndHook();
            _simConnectManager.Stop();

            Application.Current.Shutdown();
        }

        private void OnMinimizeAllPanels(object commandParameter)
        {
            IsMinimizedAllPanels = !IsMinimizedAllPanels;
            if (IsMinimizedAllPanels)
            {
                DataStore.AllowEdit = false;
                WindowManager.MinimizeAllPopoutPanels(true);
                Logger.LogStatus("All pop out panels have been minimized. Panel configuration has been disabled.", StatusMessageType.Info);
            }
            else
            {
                DataStore.AllowEdit = true;
                WindowManager.MinimizeAllPopoutPanels(false);
                Logger.ClearStatus();
            }
        }

        private void OnUserProfileSelected(object commandParameter)
        {
            var profileId = Convert.ToInt32(commandParameter);

            if (profileId != DataStore.ActiveUserProfileId)
                DataStore.ActiveUserProfileId = profileId;
        }

        private void OnShowPanelCoorOverlay(object commandParameter)
        {
            PanelSelectionViewModel.IsEditingPanelCoorOverlay = !PanelSelectionViewModel.IsEditingPanelCoorOverlay;
            PanelSelectionViewModel.EditPanelCoorOverlayCommand.Execute(null);
        }

        private void OnStartPopOut(object commandParameter)
        {
            ShowPanelSelection(true);
            PanelSelectionViewModel.StartPopOutCommand.Execute(null);
        }

        private void OnAlwaysOnTopChanged(object sender, EventArgs<bool> e)
        {
            WindowManager.ApplyAlwaysOnTop(DataStore.ApplicationHandle, e.Value);
        }

        private void ShowPanelSelection(bool show)
        {
            IsShownPanelSelectionScreen = show;
            IsShownPanelConfigurationScreen = !show;
        }

        private void OnStatusMessageLogged(EventArgs<StatusMessage> e)
        {
            StatusMessage = e.Value;
            ShowContextMenuBalloonTip?.Invoke(this, new EventArgs<StatusMessage>(e.Value));
        }

        private bool CanExecute(object commandParameter)
        {
            return true;
        }

        private void ActivateAutoPanelPopOut()
        {
            _simConnectManager.OnFlightStarted += HandleOnFlightStarted;
            _simConnectManager.OnFlightStopped += HandleOnFlightStopped;
        }

        private void DeativateAutoPanelPopOut()
        {
            DataStore.IsEnteredFlight = false;
            _simConnectManager.OnFlightStarted -= HandleOnFlightStarted;
            _simConnectManager.OnFlightStopped -= HandleOnFlightStopped;
        }

        private void HandleOnFlightStarted(object sender, EventArgs e)
        {
            Debug.WriteLine("Flight Started");

            DataStore.IsEnteredFlight = true;
            ShowPanelSelection(true);

            // find the profile with the matching binding plane title
            var profile = DataStore.UserProfiles.FirstOrDefault(p => p.BindingPlaneTitle == DataStore.CurrentMsfsPlaneTitle);

            if (profile != null)
            {
                Thread.Sleep(DataStore.AppSetting.AutoPopOutPanelsWaitDelay.ReadyToFlyButton * 1000);         // Wait for the ready to fly button
                
                InputEmulationManager.LeftClickReadyToFly();

                Application.Current.Dispatcher.Invoke(() =>
                {
                    var messageDialog = new OnScreenMessageDialog($"Panel pop out in progress for profile:\n{profile.ProfileName}", DataStore.AppSetting.AutoPopOutPanelsWaitDelay.InitialCockpitView);
                    messageDialog.ShowDialog();

                    // Turn on power if required to pop out panels
                    _simConnectManager.TurnOnPower(profile.PowerOnRequiredForColdStart);
                    Thread.Sleep(DataStore.AppSetting.AutoPopOutPanelsWaitDelay.InstrumentationPowerOn * 1000);     // Wait for battery to be turned on

                    DataStore.ActiveUserProfileId = profile.ProfileId;
                    _panelPopoutManager.UserProfile = profile;
                    _panelPopoutManager.AppSetting = DataStore.AppSetting;
                    _panelPopoutManager.StartPopout();

                    // Turn off power if needed after pop out
                    _simConnectManager.TurnOffpower();
                });
            }
        }

        private void HandleOnFlightStopped(object sender, EventArgs e)
        {
            DataStore.IsEnteredFlight = false;
        }
    }
}