using System.Windows.Input;
using Chronos.Presentation.Core.VirtualDesktops;
using Chronos.Presentation.Core.Widgets;
using Chronos.Presentation.Core.Windows;
using Chronos.Presentation.ViewModel;
using nRoute.Components;

namespace Chronos.WidgetLibrary
{
  /// <summary>
  /// Widget Definition ViewModel
  /// </summary>
  public sealed class WidgetItemViewModel
      : ViewModelBase, IWidget
  {
    #region · Fields ·

    private IWidget widgetDefinition;
    private ICommand createWidgetCommand;

    #endregion

    #region · Commands ·

    /// <summary>
    /// Gets the create widget command.
    /// </summary>
    /// <value>The create widget command.</value>
    public ICommand CreateWidgetCommand
    {
      get
      {
        if (this.createWidgetCommand == null)
        {
          this.createWidgetCommand = new ActionCommand(() => OnCreateWidget());
        }

        return this.createWidgetCommand;
      }
    }

    #endregion

    #region · Properties ·

    /// <summary>
    /// Gets the widget title
    /// </summary>
    /// <value></value>
    public string Title
    {
      get { return this.widgetDefinition.Title; }
    }

    /// <summary>
    /// Gets the widget description
    /// </summary>
    /// <value></value>
    public string Description
    {
      get { return this.widgetDefinition.Description; }
    }

    /// <summary>
    /// Gets the widget group
    /// </summary>
    /// <value></value>
    public string Group
    {
      get { return this.widgetDefinition.Group; }
    }

    /// <summary>
    /// Gets the widget icon style
    /// </summary>
    /// <value></value>
    public string IconStyle
    {
      get { return this.widgetDefinition.IconStyle; }
    }

    #endregion

    #region · Constructors ·

    /// <summary>
    /// Initializes a new instance of the <see cref="WidgetItemViewModel"/> class.
    /// </summary>
    /// <param name="widget">The widget.</param>
    public WidgetItemViewModel(IWidget widgetDefinition)
      : base()
    {
      this.widgetDefinition = widgetDefinition;
    }

    #endregion

    #region · IWidget Members ·

    /// <summary>
    /// Creates the widget view
    /// </summary>
    /// <returns></returns>
    System.Windows.FrameworkElement IWidget.CreateView()
    {
      return this.widgetDefinition.CreateView();
    }

    #endregion

    #region · Command Actions ·

    /// <summary>
    /// Handles the create widget command.
    /// </summary>
    private void OnCreateWidget()
    {
      this.GetService<IVirtualDesktopManager>()
          .Show(this.widgetDefinition.CreateView() as IDesktopElement);
    }

    #endregion
  }
}