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// (C) Copyright 2003-2019 by Autodesk, Inc.
//
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// object code form for any purpose and without fee is hereby granted,
// provided that the above copyright notice appears in all copies and
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using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;

using Autodesk.Revit;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Autodesk.Revit.DB.Structure;


namespace Revit.SDK.Samples.InPlaceMembers.CS
{
    /// <summary>
    /// This command shows how to get In-place Family instance properties and
    /// paint it AnalyticalModel profile on a PictureBox.
    /// </summary>
    [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
    [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
    [Autodesk.Revit.Attributes.Journaling(Autodesk.Revit.Attributes.JournalingMode.NoCommandData)]
    public class Command : IExternalCommand
    {
        static ExternalCommandData m_commandData;

        /// <summary>
        /// Implement this method as an external command for Revit.
        /// </summary>
        /// <param name="commandData">An object that is passed to the external application 
        /// which contains data related to the command, 
        /// such as the application object and active view.</param>
        /// <param name="message">A message that can be set by the external application 
        /// which will be displayed if a failure or cancellation is returned by 
        /// the external command.</param>
        /// <param name="elements">A set of elements to which the external application 
        /// can add elements that are to be highlighted in case of failure or cancellation.</param>
        /// <returns>Return the status of the external command. 
        /// A result of Succeeded means that the API external method functioned as expected. 
        /// Cancelled can be used to signify that the user cancelled the external operation 
        /// at some point. Failure should be returned if the application is unable to proceed with 
        /// the operation.</returns>
        public Autodesk.Revit.UI.Result Execute(ExternalCommandData commandData,
            ref string message, Autodesk.Revit.DB.ElementSet elements)
        {
            m_commandData = commandData;
            Transaction transaction = new Transaction(commandData.Application.ActiveUIDocument.Document, "External Tool");

            FamilyInstance inPlace = null;

            AnalyticalElement model = null;

            try
            {
                transaction.Start();
                if (!PrepareData(ref inPlace, ref model))
                {
                    message = "You should select only one in place member which have analytical model.";
                    return Autodesk.Revit.UI.Result.Failed;
                }

                GraphicsData graphicsData = GraphicsDataFactory.CreateGraphicsData(model);
                Properties instanceProperties = new Properties(inPlace);
                InPlaceMembersForm form = new InPlaceMembersForm(instanceProperties, graphicsData);
                if (form.ShowDialog() == System.Windows.Forms.DialogResult.Abort)
                {
                    return Autodesk.Revit.UI.Result.Failed;
                }

                return Autodesk.Revit.UI.Result.Succeeded;
            }
            catch (Exception e)
            {
                message = e.Message;
                return Autodesk.Revit.UI.Result.Failed;
            }
            finally
            {
                transaction.Commit();
            }
        }
      /// <summary>
      /// Search for the In-Place family instance's properties data to be listed
      /// and graphics data to be drawn.
      /// </summary>
      /// <param name="inPlaceMember">properties data to be listed</param>
      /// <param name="model">graphics data to be draw</param>
      /// <returns>Returns true if retrieved this data</returns>
      private bool PrepareData(ref FamilyInstance inPlaceMember, ref AnalyticalElement model)
      {
         ElementSet selected = new ElementSet();
         foreach (ElementId elementId in m_commandData.Application.ActiveUIDocument.Selection.GetElementIds())
         {
            selected.Insert(m_commandData.Application.ActiveUIDocument.Document.GetElement(elementId));
         }

         if (selected.Size != 1)
         {
            return false;
         }

         foreach (object o in selected)
         {
            inPlaceMember = o as FamilyInstance;
            if (null == inPlaceMember)
            {
               return false;
            }
         }
         Document document = inPlaceMember.Document;
         AnalyticalToPhysicalAssociationManager relManager = AnalyticalToPhysicalAssociationManager.GetAnalyticalToPhysicalAssociationManager(document);
         if (relManager != null)
         {
            ElementId associatedElementId = relManager.GetAssociatedElementId(inPlaceMember.Id);
            if (associatedElementId != ElementId.InvalidElementId)
            {
               Element associatedElement = document.GetElement(associatedElementId);
               if (associatedElement != null && associatedElement is AnalyticalElement)
               {
                  model = associatedElement as AnalyticalElement;
               }
            }
         }

         if (null == model)
         {
            return false;
         }

         return true;
      }
   }
}