//
// (C) Copyright 2003-2019 by Autodesk, Inc.
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted,
// provided that the above copyright notice appears in all copies and
// that both that copyright notice and the limited warranty and
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// documentation.
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// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
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// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
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// restrictions set forth in FAR 52.227-19 (Commercial Computer
// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
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//

using System;
using System.Collections.Generic;
using System.Text;

using Autodesk.Revit;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Revit.SDK.Samples.CurtainSystem.CS.Data;

namespace Revit.SDK.Samples.CurtainSystem.CS
{
   /// <summary>
   /// the entry point of the sample (to launch the sample dialog and allows further operations)
   /// </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)]
   class Command : IExternalCommand
   {
      #region IExternalCommand Members Implementation
      /// <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)
      {
       
         // data verification
         if (null == commandData.Application.ActiveUIDocument)
         {
            return Autodesk.Revit.UI.Result.Failed;
         }

         MyDocument mydocument = new MyDocument(commandData);

         

         // check whether the mass is kind of parallelepiped
         CurtainSystem.MassChecker checker = new CurtainSystem.MassChecker(mydocument);
         bool validMass = checker.CheckSelectedMass();

         if (!validMass)
         {
            message = Properties.Resources.MSG_InvalidSelection;
            return Result.Cancelled;
         }

         UI.CurtainForm curtainForm = null;
         TransactionGroup transactionGroup = new TransactionGroup(commandData.Application.ActiveUIDocument.Document);
         try
         {
            transactionGroup.Start("CurtainSystemOperation");
            curtainForm = new UI.CurtainForm(mydocument);
            
            if (null != curtainForm && false == curtainForm.IsDisposed)
            {
               curtainForm.ShowDialog();
            }

            transactionGroup.Commit();
         }
         catch (System.Exception ex)
         {
         	transactionGroup.RollBack();
            message = ex.Message;
            return Result.Failed;
         }
         finally
         {
            if (null != curtainForm && false == curtainForm.IsDisposed)
            {
               curtainForm.Dispose();
            }
         }

         return Autodesk.Revit.UI.Result.Succeeded;
      }
      #endregion
   }
}