using System.ComponentModel;
using System.ComponentModel.Composition;
using System.Threading.Tasks;
using DTS.Common.Base;
using DTS.Common.Events;
using DTS.Common.Interactivity;
using DTS.Common.Interface;
using Prism.Events;
using Prism.Regions;
using Unity;

namespace TablesSettings
{
    [Export(typeof(ITablesSettingsView))]
    [PartCreationPolicy(CreationPolicy.Shared)]
    public class TablesSettingsViewModel : ITablesSettingsViewModel
    {
        public ITablesSettingsView View { get; private set; }
        private IEventAggregator _eventAggregator { get; set; }
        private IRegionManager _regionManager;
        private IUnityContainer UnityContainer { get; set; }

        public InteractionRequest<Notification> NotificationRequest { get; private set; }
        public InteractionRequest<Confirmation> ConfirmationRequest { get; private set; }

        /// <summary>
        /// Creates a new instance of the TechnologyDomainEditViewModel.
        /// </summary>
        /// <param name="view">The ShellView View.</param>
        /// <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 unityContainer.</param>
        public TablesSettingsViewModel(ITablesSettingsView view, IRegionManager regionManager, IEventAggregator eventAggregator, IUnityContainer unityContainer)
        //: base(regionManager, eventAggregator, unityContainer)
        {
            View = view;
            View.DataContext = this;
            NotificationRequest = new InteractionRequest<Notification>();
            ConfirmationRequest = new InteractionRequest<Confirmation>();

            _eventAggregator = eventAggregator;
            UnityContainer = unityContainer;
            _regionManager = regionManager;
            _eventAggregator.GetEvent<RaiseNotification>().Subscribe(OnRaiseNotification);
            _eventAggregator.GetEvent<BusyIndicatorChangeNotification>().Subscribe(OnBusyIndicatorNotification, ThreadOption.PublisherThread, true);
        }
        #region Methods

        public void Cleanup() { }

        public Task CleanupAsync() { return Task.CompletedTask; }

        public void Initialize() { }

        public void Initialize(object parameter)
        {

        }
        public void Initialize(object parameter, object model)
        {

        }

        public Task InitializeAsync() { return Task.CompletedTask; }

        public Task InitializeAsync(object parameter) { return Task.CompletedTask; }

        public void Activated() { }

        /// <summary>
        /// Private Event handler for RaiseNotification event.
        /// </summary>
        private void OnBusyIndicatorNotification(bool eventArg)
        {
            IsBusy = eventArg;
        }

        /// <summary>
        /// Private Event handler for RaiseNotification event.
        /// </summary>
        private void OnRaiseNotification(NotificationContentEventArgs eventArgsWithTitle)
        {
            // The NotificationRequest.Raise triggers the Invoke() method of the .Infrastructure.PopupWindowAction object
            // to show the .Infrastructure.NotificationWindow window

            // Notification object expects a NotificationContentEventArgsWithoutTitle object and a Title string.
            var eventArgsWithoutTitle = new NotificationContentEventArgs(eventArgsWithTitle.Message, "", eventArgsWithTitle.Image, "");

            NotificationRequest.Raise(new Notification { Content = eventArgsWithoutTitle, Title = eventArgsWithTitle.Title });
        }

        #endregion



        #region Properties
        public bool IsDirty { get; private set; }

        private bool _isBusy = false;
        public bool IsBusy
        {
            get => _isBusy;
            set { _isBusy = value; OnPropertyChanged("IsBusy"); }
        }

        private bool _isMenuIncluded = false;
        public bool IsMenuIncluded
        {
            get => _isMenuIncluded;
            set
            {
                _isMenuIncluded = value;
                OnPropertyChanged("IsMenuIncluded");
            }
        }
        private bool _isNavigationIncluded = false;
        public bool IsNavigationIncluded
        {
            get => _isNavigationIncluded;
            set
            {
                _isNavigationIncluded = value;
                OnPropertyChanged("IsNavigationIncluded");
            }
        }
        /// <summary>
        /// Gets the HeaderInfo.
        /// </summary>
        public string HeaderInfo => "MainRegion";
        #endregion Properties

        ///<summary>
        ///Occurs when a property value changes.
        ///</summary>
        public event PropertyChangedEventHandler PropertyChanged;

        private void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        public bool SetProperty<T>(ref T storage, T value, string propertyName = null)
        {
            throw new System.NotImplementedException();
        }

        void IBasePropertyChanged.OnPropertyChanged(string propertyName)
        {
            OnPropertyChanged(propertyName);
        }
    }
}