/*************************************************************************************
   
   Toolkit for WPF

   Copyright (C) 2007-2018 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license 

   For more features, controls, and fast professional support,
   pick up the Plus Edition at https://xceed.com/xceed-toolkit-plus-for-wpf/

   Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids

  ***********************************************************************************/

using System.Linq;
using System.Windows;
using System.Windows.Media;
using Xceed.Wpf.AvalonDock.Layout;

namespace Xceed.Wpf.AvalonDock.Controls
{
  internal class DocumentPaneGroupDropTarget : DropTarget<LayoutDocumentPaneGroupControl>
  {
    #region Constructors

    internal DocumentPaneGroupDropTarget( LayoutDocumentPaneGroupControl paneControl, Rect detectionRect, DropTargetType type )
        : base( paneControl, detectionRect, type )
    {
      _targetPane = paneControl;
    }

    #endregion

    #region Members

    private LayoutDocumentPaneGroupControl _targetPane;

    #endregion

    #region Overrides

    protected override void Drop( LayoutDocumentFloatingWindow floatingWindow )
    {
      ILayoutPane targetModel = _targetPane.Model as ILayoutPane;

      switch( Type )
      {
        case DropTargetType.DocumentPaneGroupDockInside:
          #region DropTargetType.DocumentPaneGroupDockInside
          {
            var paneGroupModel = targetModel as LayoutDocumentPaneGroup;
            var paneModel = paneGroupModel.Children[ 0 ] as LayoutDocumentPane;
            var sourceModel = floatingWindow.RootDocument;

            paneModel.Children.Insert( 0, sourceModel );
          }
          break;
          #endregion
      }
      base.Drop( floatingWindow );
    }

    protected override void Drop( LayoutAnchorableFloatingWindow floatingWindow )
    {
      ILayoutPane targetModel = _targetPane.Model as ILayoutPane;

      switch( Type )
      {
        case DropTargetType.DocumentPaneGroupDockInside:
          #region DropTargetType.DocumentPaneGroupDockInside
          {
            var paneGroupModel = targetModel as LayoutDocumentPaneGroup;
            var paneModel = paneGroupModel.Children[ 0 ] as LayoutDocumentPane;
            var layoutAnchorablePaneGroup = floatingWindow.RootPanel as LayoutAnchorablePaneGroup;

            int i = 0;
            foreach( var anchorableToImport in layoutAnchorablePaneGroup.Descendents().OfType<LayoutAnchorable>().ToArray() )
            {
              anchorableToImport.SetCanCloseInternal( true );

              paneModel.Children.Insert( i, anchorableToImport );
              i++;
            }
          }
          break;
          #endregion
      }

      base.Drop( floatingWindow );
    }

    public override System.Windows.Media.Geometry GetPreviewPath( OverlayWindow overlayWindow, LayoutFloatingWindow floatingWindowModel )
    {
      switch( Type )
      {
        case DropTargetType.DocumentPaneGroupDockInside:
          #region DropTargetType.DocumentPaneGroupDockInside
          {
            var targetScreenRect = TargetElement.GetScreenArea();
            targetScreenRect.Offset( -overlayWindow.Left, -overlayWindow.Top );

            return new RectangleGeometry( targetScreenRect );
          }
          #endregion
      }

      return null;
    }

    #endregion
  }
}