using System.ComponentModel;
using DTS.Common.Base;
using DTS.Common.Events;
using DTS.Common.Interface;
using Microsoft.Practices.Prism.Events;
using Microsoft.Practices.Prism.Interactivity.InteractionRequest;
using Microsoft.Practices.Prism.Regions;
using Microsoft.Practices.Unity;

namespace DTS.Viewer
{
    public class MainViewModel : BaseViewModel<IMainViewModel>, IMainViewModel
    {
        public IMainView View { get; private set; }
        private IViewerShellViewModel Parent { get; 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 MainViewModel.
        /// </summary>
        /// <param name="view">The MainView 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 Unity container.</param>
        public MainViewModel(IMainView 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);


            _unityContainer.RegisterType<IMenuView, MenuView>();
            _unityContainer.RegisterType<IMenuViewModel, MenuViewModel>();

            _unityContainer.RegisterType<INavigationView, NavigationView>();
            _unityContainer.RegisterType<INavigationViewModel, NavigationViewModel>();
        }

        #region Methods
        /// <summary>
        /// Initialize without parameter
        /// </summary>
        public override void Initialize()
        {

        }

        /// <summary>
        /// Initialize with parameter - Parent
        /// </summary>
        public override void Initialize(object parameter)
        {
            Parent = (IViewerShellViewModel)parameter;
            Parent.IsMenuIncluded = _isMenuIncluded;
            Parent.IsNavigationIncluded = _isNavigationIncluded;
            _eventAggregator.GetEvent<AssemblyListNotification>().Subscribe(OnAssemblyListChange, ThreadOption.PublisherThread, true);
            View.DataContext = this;
        }

        public override void Activated()
        {

        }

        /// <summary>
        /// Display loaded assemblies
        /// </summary>
        /// <param name="e">List of loaded assemblies</param>
        private void OnAssemblyListChange(AssemblyListInfo e)
        {
            //var groupListView = _unityContainer.Resolve<IGroupListView>();
            //var groupListViewModel = _unityContainer.Resolve<IGroupListViewModel>();

            //var asmImage = new List<AssemblyNameImage>();
            //foreach (var assembly in e.AssemblyList)
            //{
            //    asmImage.AddRange(from attribute in assembly.GetCustomAttributes()
            //                      where attribute.GetType().Name.EndsWith("ImageAttribute")
            //                      select new AssemblyNameImage
            //                      {
            //                          AssemblyGroup = ((ImageAttribute)attribute).GeAssemblyGroup(),
            //                          AssemblyName = Regex.Replace(((ImageAttribute)attribute).GeAssemblyName(), "(\\B[A-Z])", " $1"),
            //                          AssemblyImage = ((ImageAttribute)attribute).GeAssemblyImage(),
                                      
            //                      });
            //}
            //var asmGroups = new List<AssemblyGroups>();
            //asmGroups.AddRange(from a in asmImage orderby a.SortOrder group a by a.AssemblyGroup into g select new AssemblyGroups { AssemblyGroupName = g.Key, AssemblyList = new List<AssemblyNameImage>(g.ToList()) });
            
            //foreach (var group in asmGroups)
            //{
            //    var groupView = new GroupView();
            //    var groupViewModel = new GroupViewModel(groupView, _regionManager, _eventAggregator, _unityContainer)
            //    {
            //        GroupName = @group.AssemblyGroupName,
            //        AssemblyList = @group.AssemblyList
            //    };
            //    groupViewModel.Initialize(groupListViewModel);
            //    groupView.DataContext = groupViewModel;

            //    groupListViewModel.GroupList.Add(groupView);
            //}

            //groupListViewModel.View = groupListView;
            //groupListViewModel.Initialize(this);
            //groupListView.DataContext = groupListViewModel;
            //ContextMainRegion = groupListView;
        }

        /// <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.MessageDetails, eventArgsWithTitle.Image);

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

        ///<summary>
        ///Occurs when a property value changes.
        ///</summary>
        public event PropertyChangedEventHandler PropertyChanged;
        private void OnPropertyChanged(string propertyName)
        {
            PropertyChangedEventHandler eventHandler = this.PropertyChanged;
            if (eventHandler != null)
            {
                eventHandler(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        #endregion

        #region ContextRegion
        public object ContextMainRegion
        {
            get
            {
                return null; /* ((MainView)View).MainRegion.Content; */ }
            set
            {
                //((MainView)View).MainRegion.Content = value;
                //var viewModel = (IBaseViewModel)((IBaseView)value).DataContext;
                //Parent.IsMenuIncluded = viewModel.IsMenuIncluded;
                //Parent.IsNavigationIncluded = viewModel.IsNavigationIncluded;
                OnPropertyChanged("ContextMainRegion");
            }
        }
        #endregion

        #region Properties
        //List<IGroupView> _assemblyGroupList = new List<IGroupView>();
        //public List<IGroupView> AssemblyGroupList
        //{
        //    get { return _assemblyGroupList; }
        //    set { _assemblyGroupList = value; OnPropertyChanged("AssemblyGroupList"); }
        //}



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

        /// <summary>
        /// Gets the HeaderInfo.
        /// </summary>
        public string HeaderInfo { get { return "MainRegion"; } }

        #endregion
    }
}