using System;
using System.Collections.Generic;
using System.Linq;
using Autodesk.Revit.DB;
using Autodesk.Revit.DB.IFC;
using Autodesk.Revit.Exceptions;

namespace IFC_Revit_Interop
{
	// Token: 0x02000019 RID: 25
	internal class CurtainParentFinder
	{
		// Token: 0x0600007A RID: 122 RVA: 0x00006EAB File Offset: 0x000050AB
		public CurtainParentFinder(ParentFinder host)
		{
			this.host = host;
			this.doc = host.doc;
		}

		// Token: 0x0600007B RID: 123 RVA: 0x00006EC8 File Offset: 0x000050C8
		public void Find()
		{
			foreach (Element element2 in this.host.coll.Where((Element element) => element is Wall || element is FootPrintRoof || element is ExtrusionRoof || element is CurtainSystem))
			{
				try
				{
					ICollection<ElementId> curtainChildren = this.GetCurtainChildren(element2);
					if (curtainChildren != null)
					{
						foreach (ElementId elementId in curtainChildren)
						{
							this.host.ChildToParent[elementId.IntegerValue] = element2.Id.IntegerValue;
						}
					}
				}
				catch (Exception ex)
				{
					this.host.log.WriteException("ERR_CurtainParentFinder", ex);
				}
			}
		}

		// Token: 0x0600007C RID: 124 RVA: 0x00006FC0 File Offset: 0x000051C0
		private ICollection<ElementId> GetCurtainChildren(Element hostElement)
		{
			CurtainGridSet curtainGridSet = this.GetCurtainGridSet(hostElement);
			if (curtainGridSet == null && hostElement is Wall)
			{
				return ExporterIFCUtils.GetLegacyCurtainSubElements(hostElement);
			}
			if (curtainGridSet.Size == 0)
			{
				return null;
			}
			return this.GetSubElements(curtainGridSet);
		}

		// Token: 0x0600007D RID: 125 RVA: 0x00006FF8 File Offset: 0x000051F8
		private CurtainGridSet GetCurtainGridSet(Element element)
		{
			CurtainGridSet curtainGridSet = null;
			if (element is Wall)
			{
				Wall wall = element as Wall;
				if (!this.IsLegacyCurtainWall(wall))
				{
					CurtainGrid curtainGrid = wall.CurtainGrid;
					curtainGridSet = new CurtainGridSet();
					if (curtainGrid != null)
					{
						curtainGridSet.Insert(curtainGrid);
					}
				}
			}
			else if (element is FootPrintRoof)
			{
				curtainGridSet = (element as FootPrintRoof).CurtainGrids;
			}
			else if (element is ExtrusionRoof)
			{
				curtainGridSet = (element as ExtrusionRoof).CurtainGrids;
			}
			else if (element is CurtainSystem)
			{
				curtainGridSet = (element as CurtainSystem).CurtainGrids;
			}
			return curtainGridSet;
		}

		// Token: 0x0600007E RID: 126 RVA: 0x0000707C File Offset: 0x0000527C
		private ICollection<ElementId> GetSubElements(CurtainGridSet gridSet)
		{
			HashSet<ElementId> hashSet = new HashSet<ElementId>();
			foreach (object obj in gridSet)
			{
				CurtainGrid curtainGrid = (CurtainGrid)obj;
				hashSet.UnionWith(this.GetVisiblePanelsForGrid(curtainGrid));
				hashSet.UnionWith(curtainGrid.GetMullionIds());
			}
			return hashSet;
		}

		// Token: 0x0600007F RID: 127 RVA: 0x000070EC File Offset: 0x000052EC
		private ICollection<ElementId> GetVisiblePanelsForGrid(CurtainGrid curtainGrid)
		{
			ICollection<ElementId> panelIds = curtainGrid.GetPanelIds();
			if (panelIds == null)
			{
				return null;
			}
			HashSet<ElementId> hashSet = new HashSet<ElementId>();
			foreach (ElementId elementId in panelIds)
			{
				Element element = this.doc.GetElement(elementId);
				if (element != null)
				{
					ElementId elementId2 = ElementId.InvalidElementId;
					if (element is Panel)
					{
						elementId2 = (element as Panel).FindHostPanel();
					}
					if (elementId2 != ElementId.InvalidElementId)
					{
						Element element2 = this.doc.GetElement(elementId2);
						if (this._isCurtainSystem(element2))
						{
							CurtainGridSet curtainGridSet = this.GetCurtainGridSet(element2);
							if (curtainGridSet == null || curtainGridSet.Size == 0)
							{
								hashSet.Add(elementId2);
							}
							else
							{
								ICollection<ElementId> subElements = this.GetSubElements(curtainGridSet);
								hashSet.UnionWith(subElements);
							}
						}
						else
						{
							hashSet.Add(elementId2);
						}
					}
					else
					{
						hashSet.Add(elementId);
					}
				}
			}
			return hashSet;
		}

		// Token: 0x06000080 RID: 128 RVA: 0x000071EC File Offset: 0x000053EC
		private bool _isCurtainSystem(Element element)
		{
			if (element == null)
			{
				return false;
			}
			CurtainGridSet curtainGridSet = this.GetCurtainGridSet(element);
			if (curtainGridSet == null)
			{
				return element is Wall;
			}
			return curtainGridSet.Size > 0;
		}

		// Token: 0x06000081 RID: 129 RVA: 0x0000721C File Offset: 0x0000541C
		private bool IsLegacyCurtainWall(Wall wall)
		{
			try
			{
				CurtainGrid curtainGrid = wall.CurtainGrid;
				if (curtainGrid == null)
				{
					return false;
				}
				curtainGrid.GetPanelIds();
			}
			catch (Autodesk.Revit.Exceptions.InvalidOperationException ex)
			{
				if (ex.Message == "The host object is obsolete.")
				{
					return true;
				}
				throw ex;
			}
			return false;
		}

		// Token: 0x0400007C RID: 124
		private ParentFinder host;

		// Token: 0x0400007D RID: 125
		private Document doc;
	}
}