using DTS.Common.Base;
using DTS.Common.Enums;
using DTS.Common.Enums.Sensors;
using DTS.Common.Interface;
using System;
using System.Windows;
using System.Collections.Generic;
using System.ComponentModel;
using System.Threading.Tasks;
using DTS.Common.Events;
using DTS.Viewer.PSDReport.Resources;
using DTS.Common.Utils;
using Prism.Events;
using Unity;
using Prism.Regions;
using DTS.Common.Interactivity;

namespace DTS.Viewer.PSDReport
{
    public class PSDReportMainViewModel : BaseViewModel<IPSDReportMainViewModel>, IPSDReportMainViewModel
    {
        public IBaseView View { get; set; }

        private IBaseWindowModel Parent { get; set; }
        private IEventAggregator _eventAggregator { get; set; }
        private IUnityContainer _unityContainer { get; set; }

        public InteractionRequest<Notification> NotificationRequest { get; private set; }
        public new InteractionRequest<Confirmation> ConfirmationRequest { get; private set; }
        /// <summary>
        /// Creates a new instance of the MainViewModel.
        /// </summary>

        /// <param name="regionManager">The logical placeholder defined within the application's UI (in the shell or within views) into which views are displayed.</param>
        /// <param name="eventAggregator">The EventAggregator which allows different components to publish/subscribe to events without being coupled to each other.</param>
        /// <param name="unityContainer">The Unity container.</param>
        public PSDReportMainViewModel(IRegionManager regionManager, IEventAggregator eventAggregator, IUnityContainer unityContainer)
            : base(regionManager, eventAggregator, unityContainer)
        {
            NotificationRequest = new InteractionRequest<Notification>();
            ConfirmationRequest = new InteractionRequest<Confirmation>();

            _eventAggregator = eventAggregator;
            _unityContainer = unityContainer;

            View = _unityContainer.Resolve<IPSDReportMainViewGrid>();
            View.DataContext = this;
        }
        #region properties
        public object ContextNavigationRegion
        {
            get => ((PSDReportMainViewGrid)View).NavigationRegion.Content;
            set
            {
                ((PSDReportMainViewGrid)View).NavigationRegion.Content = value;
                OnPropertyChanged("ContextNavigationRegion");
            }
        }
        public object ContextGraphsRegion { get => ((PSDReportMainViewGrid)View).GraphListRegion.Content; set { ((PSDReportMainViewGrid)View).GraphListRegion.Content = value; OnPropertyChanged("ContextGraphsRegion"); } }
        public object ContextGraphListRegion { get => ((PSDReportMainViewGrid)View).GraphListRegion.Content; set { ((PSDReportMainViewGrid)View).GraphListRegion.Content = value; OnPropertyChanged("ContextGraphListRegion"); } }
        public object ContextTestsRegion { get => ((PSDReportMainViewGrid)View).TestsRegion.Content; set { ((PSDReportMainViewGrid)View).TestsRegion.Content = value; OnPropertyChanged("ContextTestsRegion"); } }
        public object ContextLegendRegion { get => ((PSDReportMainViewGrid)View).LegendRegion.Content; set { ((PSDReportMainViewGrid)View).LegendRegion.Content = value; OnPropertyChanged("ContextLegendRegion"); } }
        public object ContextPropertyRegion { get; set; }
        public object ContextChartOptionsRegion { get => ((PSDReportMainViewGrid)View).ChartOptionsRegion.Content; set { ((PSDReportMainViewGrid)View).ChartOptionsRegion.Content = value; OnPropertyChanged("ContextChartOptionsRegion"); } }
        public object ContextViewerSettingsRegion { get => ((PSDReportMainViewGrid)View).SettingsRegion.Content; set { ((PSDReportMainViewGrid)View).SettingsRegion.Content = value; OnPropertyChanged("ContextViewerSettingsRegion"); } }
        public object ContextReportDataSelectRegion { get => ((PSDReportMainViewGrid)View).DataSelectRegion.Content; set { ((PSDReportMainViewGrid)View).DataSelectRegion.Content = value; OnPropertyChanged("ContextReportDataSelectRegion"); } }
        public object ContextGraphRegion { get => ((PSDReportMainViewGrid)View).GraphRegion.Content; set { ((PSDReportMainViewGrid)View).GraphRegion.Content = value; OnPropertyChanged("ContextGraphRegion"); } }
        public object ContextReportChartOptionsRegion { get => ((PSDReportMainViewGrid)View).ReportChartOptionsRegion.Content; set { ((PSDReportMainViewGrid)View).ReportChartOptionsRegion.Content = value; OnPropertyChanged("ContextPSDChartOptionsRegion"); } }
        public object ContextReportResultsRegion { get => ((PSDReportMainViewGrid)View).ReportResultsRegion.Content; set { ((PSDReportMainViewGrid)View).ReportResultsRegion.Content = value; OnPropertyChanged("ContextPSDResultsRegion"); } }

        public string ConfigPath { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }

        #region Test Title

        private string _titleTests = StringResources.TestsDefaultTitle;
        public string TitleTests
        {
            get => _titleTests;
            set
            {
                _titleTests = value;
                OnPropertyChanged("TitleTests");
            }
        }
        private int _totalSelectedTests = 0;
        public int TotalSelectedTests
        {
            get => _totalSelectedTests;
            set
            {
                _totalSelectedTests = value;
                TitleTests = StringResources.TestsDefaultTitle + TotalSelectedTests + "/" + TotalLoadedTests;
                if (_totalSelectedTests == 0) { TitleGraphs = StringResources.GraphsDefaultTitle; }
                OnPropertyChanged("TotalSelectedTests");
            }
        }
        private int _totalLoadedTests = 0;
        public int TotalLoadedTests
        {
            get => _totalLoadedTests;
            set { _totalLoadedTests = value; TitleTests = StringResources.TestsDefaultTitle + TotalSelectedTests + "/" + TotalLoadedTests; OnPropertyChanged("TotalLoadedTests"); }
        }
        #endregion Test Title

        #region Graph Title
        private string _titleGraphs = StringResources.GraphsDefaultTitle;

        public string TitleGraphs
        {
            get => _titleGraphs;
            set
            {
                _titleGraphs = value;
                OnPropertyChanged("TitleGraphs");
            }
        }
        private int _totalSelectedGraphs = 0;
        public int TotalSelectedGraphs
        {
            get => _totalSelectedGraphs;
            set { _totalSelectedGraphs = value; TitleGraphs = StringResources.GraphsDefaultTitle + TotalSelectedGraphs + "/" + TotalLoadedGraphs; OnPropertyChanged("TotalSelectedGraphs"); }
        }
        private int _totalLoadedGraphs = 0;
        public int TotalLoadedGraphs
        {
            get => _totalLoadedGraphs;
            set { _totalLoadedGraphs = value; TitleGraphs = StringResources.GraphsDefaultTitle + TotalSelectedGraphs + "/" + TotalLoadedGraphs; OnPropertyChanged("TotalLoadedGraphs"); }
        }
        #endregion Graph Title

        private string _selectedDataFolder = string.Empty;
        public string SelectedDataFolder
        {
            get => _selectedDataFolder;
            set
            {
                if (string.IsNullOrEmpty(value)) return;

                _selectedDataFolder = value; _eventAggregator.GetEvent<DataFolderChangedEvent>().Publish(new DataFolderSelectionArg { Path = _selectedDataFolder, File = string.Empty, SelectAll = false, ParentVM = this }); OnPropertyChanged("SelectedDataFolder");
            }
        }

        public bool DoesUserHaveEditPermission { get; set; } = false;

        private string _selectedDataFile = string.Empty;
        public string SelectedDataFile
        {
            get => _selectedDataFile;
            set
            {
                if (string.IsNullOrEmpty(value)) return;
                _selectedDataFile = value; _eventAggregator.GetEvent<DataFolderChangedEvent>().Publish(new DataFolderSelectionArg { Path = string.Empty, File = _selectedDataFile, SelectAll = false, ParentVM = this }); OnPropertyChanged("SelectedDataFile");
            }
        }
        private IsoViewMode _channelCodeViewMode = IsoViewMode.ISOAndUserCode;
        public IsoViewMode ChannelCodeViewMode
        {
            get => _channelCodeViewMode;
            set { _channelCodeViewMode = value; _eventAggregator.GetEvent<ChannelCodesViewChangedEvent>().Publish(value); OnPropertyChanged("ChannelCodeViewMode"); }
        }

        private CalibrationBehaviors _calibrationBehaviorSetting = CalibrationBehaviors.NonLinearIfAvailable;
        public CalibrationBehaviors CalibrationBehaviorSetting
        {
            get => _calibrationBehaviorSetting;
            set { _calibrationBehaviorSetting = value; _eventAggregator.GetEvent<CalibrationBehaviorSettingChangedEvent>().Publish(value); OnPropertyChanged("CalibrationBehaviorSetting"); }
        }

        private bool _calibrationBehaviorSettableInViewer = true;
        public bool CalibrationBehaviorSettableInViewer
        {
            get => _calibrationBehaviorSettableInViewer;
            set
            {
                _calibrationBehaviorSettableInViewer = value;
                _eventAggregator.GetEvent<CalibrationBehaviorSettableInViewerChangedEvent>().Publish(value);
                OnPropertyChanged("CalibrationBehaviorSettableInViewer");
                //FB13946: Test tab should be the first if in Viewer Tile, graphs tab if in Run Test/Download
                //CalibrationSettableInViewer is a proxy here for which tile we're in
                ((PSDReportMainViewGrid)View).graphsTab.IsSelected = !value;
                ((PSDReportMainViewGrid)View).testsTab.IsSelected = value;
                //FB 14797 select first tab always to not switch when the graph is loading.
                ((PSDReportMainViewGrid)View).chartResultsTab.IsSelected = true;
                ((PSDReportMainViewGrid)View).chartResultsTab.Focusable = true;
                ((PSDReportMainViewGrid)View).chartResultsTab.Focus();
            }
        }


        private Visibility _settingsVisibility = Visibility.Visible;
        public Visibility SettingsVisibility
        {
            get => _settingsVisibility;
            private set
            {
                _settingsVisibility = value;
                OnPropertyChanged("SettingsVisibility");
            }
        }

        private bool _isBusy = false;
        /// <summary>
        /// Display or hide Busy Indicator
        /// </summary>
        public new bool IsBusy { get => _isBusy; set { _isBusy = value; OnPropertyChanged("IsBusy"); } }

        private string _isBusyMessage = string.Empty;
        /// <summary>
        /// Busy Message text
        /// </summary>
        public new string IsBusyMessage { get => _isBusyMessage; set { _isBusyMessage = value; OnPropertyChanged("IsBusyMessage"); } }

        private bool _isMenuIncluded = false;
        public new bool IsMenuIncluded { get => _isMenuIncluded; set { _isMenuIncluded = value; OnPropertyChanged("IsMenuIncluded"); } }
        private bool _isNavigationIncluded = false;
        public new bool IsNavigationIncluded { get => _isNavigationIncluded; set { _isNavigationIncluded = value; OnPropertyChanged("IsNavigationIncluded"); } }

        public bool IsDirty => throw new NotImplementedException();
        #endregion

        #region methods

        public List<System.Windows.FrameworkElement> GetRegions()
        {
            var items = new List<FrameworkElement>();
            Utils.GetChildrenByName(((PSDReportMainViewGrid)View).MainShell, "Region", ref items);
            return items;
        }
        /// <summary>
        /// Initialize without parameter
        /// </summary>
        public override void Initialize()
        {
            Subscribe();
        }

        /// <summary>
        /// Initialize with parameter - Parent
        /// </summary>
        public override void Initialize(object parameter)
        {
            Parent = (IBaseWindowModel)parameter;
            Parent.IsMenuIncluded = _isMenuIncluded;
            Parent.IsNavigationIncluded = _isNavigationIncluded;
            Subscribe();
            View.DataContext = this;
        }

        public void LeftKeyPress()
        {
            throw new NotImplementedException();
        }
        public void RightKeyPress()
        {
            throw new NotImplementedException();
        }
        public void ZoomReset()
        {
            _eventAggregator.GetEvent<ResetZoomChangedEvent>().Publish(true);
        }
        ///<summary>
        ///Occurs when a property value changes.
        ///</summary>
        public new event PropertyChangedEventHandler PropertyChanged;
        private new void OnPropertyChanged(string propertyName) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName)); }

        private void OnDataFileSelected(DataFileSelectionArg arg)
        {
            if (this != arg.ParentVM) return;
            SelectAndIncludeDataFile(arg?.File);
        }
        public void SelectAndIncludeDataFile(string value)
        {
            if (string.IsNullOrEmpty(value)) return;
            _selectedDataFile = value;
            _eventAggregator.GetEvent<DataFolderChangedEvent>().Publish(new DataFolderSelectionArg
            { Path = string.Empty, File = _selectedDataFile, SetSelected = true, SelectAll = false, ParentVM = this });
            OnPropertyChanged("SelectedDataFile");
        }
        private void Subscribe()
        {
            _eventAggregator.GetEvent<LoadViewModulEvent>().Subscribe(OnLoadViewModul, ThreadOption.PublisherThread, true);

            _eventAggregator.GetEvent<TestLoadedCountNotification>().Subscribe(OnTestLoadedChanged);
            _eventAggregator.GetEvent<TestSummaryCountNotification>().Subscribe(OnTestSelectedCountChanged);

            _eventAggregator.GetEvent<GraphLoadedCountNotification>().Subscribe(OnGraphLoadedCountChanged);
            _eventAggregator.GetEvent<GraphSelectedChannelCountNotification>().Subscribe(OnGraphSelectedCountChanged);
            _eventAggregator.GetEvent<DataFileSelectedEvent>().Subscribe(OnDataFileSelected);
            _eventAggregator.GetEvent<GraphChannelsReadCompletedNotification>().Subscribe(OnGraphChannelsReadCompleted, ThreadOption.UIThread);
        }

        private void OnLoadViewModul(LoadViewModulArg arg)
        {
            IsBusy = true;
            IsBusyMessage = "Loading view list";

            if (null == ContextGraphRegion) ContextGraphRegion = GetGraphView(this, "Graph");
            if (null == ContextReportDataSelectRegion) ContextReportDataSelectRegion = GetGraphView(this, "DataSelect");

            if (null == ContextTestsRegion) ContextTestsRegion = GetTestDefinitionView(this);

            if (null == ContextGraphListRegion) ContextGraphListRegion = GetGraphListView(this);

            if (null == ContextChartOptionsRegion) ContextChartOptionsRegion = GetChartOptionsView(this, "DataSelect");
            if (null == ContextReportChartOptionsRegion) ContextReportChartOptionsRegion = GetChartOptionsView(this, "Graph");

            if (null == ContextReportResultsRegion) ContextReportResultsRegion = GetReportResultsView(this);

            if (null == ContextViewerSettingsRegion) ContextViewerSettingsRegion = GetReportSettingsView(this);

            IsBusy = false;
            IsBusyMessage = string.Empty;
        }

        private void OnGraphLoadedCountChanged(GraphLoadedCountNotificationArg arg)
        {
            if (this != arg?.ParentVM) return;
            TotalLoadedGraphs = arg.LoadedCount;
        }

        private void OnGraphSelectedCountChanged(GraphSelectedChannelCountNotificationArg arg)
        {
            if (this != arg?.ParentVM) return;
            TotalSelectedGraphs = arg.SelectedChannelCount;
        }

        private void OnTestLoadedChanged(TestLoadedCountNotificationArg arg)
        {
            if (this != arg?.ParentVM) return;
            TotalLoadedTests = arg.LoadedCount;
        }

        private void OnTestSelectedCountChanged(TestSummaryCountNotificationArg arg)
        {
            if (this != arg?.ParentVM) return;
            TotalSelectedTests = arg.SummaryCount;
        }

        int reads = 0;
        private void OnGraphChannelsReadCompleted(GraphChannelsReadCompletedNotificationArgs arg)
        {
            if (null == arg) { return; }
            if (((IGraphView)ContextGraphRegion).DataContext != arg?.GraphVM &&
               (((IGraphView)ContextReportDataSelectRegion).DataContext != arg?.GraphVM))
                return;

            if (arg.IsReadCompleted)
            {
                if (reads > 0) reads--;
                if (reads == 0) _eventAggregator.GetEvent<BusyIndicatorChangeNotification>().Publish(false);
            }
            else
            {
                reads++;
                _eventAggregator.GetEvent<BusyIndicatorChangeNotification>().Publish(true);
            }
        }
        #endregion

        #region subscription methods
        private void OnViewerSettingsVisibilityChanged(Visibility settingsVisibility)
        {
            SettingsVisibility = settingsVisibility;
        }
        #endregion

        #region views
        private INavigationView GetNavigationView(IBaseViewModel parent)
        {
            var view = _unityContainer.Resolve<INavigationView>();
            var viewModel = _unityContainer.Resolve<INavigationViewModel>();
            view.DataContext = viewModel;
            viewModel.Initialize(parent);
            return view;
        }
        private INavigationViewModel GetNavigationViewModel(IBaseViewModel parent)
        {
            var view = _unityContainer.Resolve<INavigationView>();
            var viewModel = _unityContainer.Resolve<INavigationViewModel>();
            view.DataContext = viewModel;
            viewModel.Initialize(parent);
            return viewModel;
        }
        private IPSDReportResultsView GetReportResultsView(IBaseViewModel parent)
        {
            var view = _unityContainer.Resolve<IPSDReportResultsView>();
            var viewModel = _unityContainer.Resolve<IPSDReportResultsViewModel>();
            view.DataContext = viewModel;
            viewModel.Initialize(parent);
            return view;
        }
        private IPSDReportSettingsView GetReportSettingsView(IBaseViewModel parent)
        {
            var view = _unityContainer.Resolve<IPSDReportSettingsView>();
            var viewModel = _unityContainer.Resolve<IPSDReportSettingsViewModel>();
            view.DataContext = viewModel;
            viewModel.Initialize(parent);
            return view;
        }
        private IChartOptionsView GetChartOptionsView(IBaseViewModel parent, string chartType)
        {
            var view = _unityContainer.Resolve<IChartOptionsView>();
            var viewModel = _unityContainer.Resolve<IChartOptionsViewModel>();
            view.DataContext = viewModel;
            viewModel.Initialize(new Tuple<IBaseViewModel, string>(parent, chartType));
            return view;
        }
        private IGraphView GetGraphView(IBaseViewModel parent, string graphType)
        {
            var view = _unityContainer.Resolve<IGraphView>();
            var viewModel = _unityContainer.Resolve<IGraphViewModel>();
            view.DataContext = viewModel;
            viewModel.Initialize(new Tuple<IBaseViewModel, string>(parent, graphType));
            return view;
        }
        private IGraphMainView GetGraphListView(IBaseViewModel parent)
        {
            var view = _unityContainer.Resolve<IGraphMainView>();
            var viewModel = _unityContainer.Resolve<IGraphMainViewModel>();
            view.DataContext = viewModel;
            viewModel.Initialize(parent);
            return view;
        }
        private IViewerSettingsView GetViewerSettingsView(IBaseViewModel parent)
        {
            var view = _unityContainer.Resolve<IViewerSettingsView>();
            var viewModel = _unityContainer.Resolve<IViewerSettingsViewModel>();
            view.DataContext = viewModel;
            viewModel.Initialize(parent);
            return view;
        }
        private ITestSummaryListView GetTestDefinitionView(IBaseViewModel parent)
        {
            var view = _unityContainer.Resolve<ITestSummaryListView>();
            var viewModel = _unityContainer.Resolve<ITestSummaryListViewModel>();
            view.DataContext = viewModel;
            viewModel.Initialize(parent);
            return view;
        }
        #endregion
    }
}