//
// (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
// restricted rights notice below appear in all supporting
// 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
// UNINTERRUPTED OR ERROR FREE.
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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)
// (Rights in Technical Data and Computer Software), as applicable.
//

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

using Autodesk.Revit;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Autodesk.Revit.DB.Fabrication;
using System.Windows.Forms;
using Autodesk.Revit.UI.Selection;

namespace Revit.SDK.Samples.FabricationPartLayout.CS
{
   #region Detach Rods
   /// <summary>
   /// Implements the Revit add-in interface IExternalCommand
   /// </summary>
   [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
   [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
   public class DetachRods : IExternalCommand
   {
      /// <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 virtual Result Execute(ExternalCommandData commandData
          , ref string message, ElementSet elements)
      {
         try
         {
            // check user selection
            var uiDoc = commandData.Application.ActiveUIDocument;
            var doc = uiDoc.Document;
            Reference refObj = uiDoc.Selection.PickObject(ObjectType.Element, "Pick a fabrication part hanger to start.");
            var part = doc.GetElement(refObj) as FabricationPart;

            if (part == null || part.IsAHanger() == false)
            {
               message = "The selected element is not a fabrication part hanger.";
               return Result.Failed;
            }

            var rodInfo = part.GetRodInfo();
            using (var trans = new Transaction(doc, "Detach Rods"))
            {
               trans.Start();

               rodInfo.CanRodsBeHosted = false;

               trans.Commit();
            }

            message = "Detach successful";
            return Result.Succeeded;
         }
         catch (Exception ex)
         {
            message = ex.Message;
            return Result.Failed;
         }
      }
   }
   #endregion

   #region Increase Rod Length (x2)
   /// <summary>
   /// Implements the Revit add-in interface IExternalCommand
   /// </summary>
   [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
   [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
   public class DoubleRodLength : IExternalCommand
   {
      /// <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 virtual Result Execute(ExternalCommandData commandData
          , ref string message, ElementSet elements)
      {
         try
         {
            // check user selection
            var uiDoc = commandData.Application.ActiveUIDocument;
            var doc = uiDoc.Document;
            Reference refObj = uiDoc.Selection.PickObject(ObjectType.Element, "Pick a fabrication part hanger to start.");
            var part = doc.GetElement(refObj) as FabricationPart;

            if (part == null || part.IsAHanger() == false)
            {
               message = "The selected element is not a fabrication part hanger.";
               return Result.Failed;
            }

            var rodInfo = part.GetRodInfo();
            if (rodInfo.IsAttachedToStructure == true)
            {
               message = "The hanger rods must be detached from their host first";
               return Result.Failed;
            }

            using (var trans = new Transaction(doc, "Double Rod Length"))
            {
               trans.Start();

               for (int i = 0; i < rodInfo.RodCount; i++)
               {
                  var originalLength = rodInfo.GetRodLength(i);
                  rodInfo.SetRodLength(i, originalLength * 2.0);
               }

               trans.Commit();
            }

            return Result.Succeeded;
         }
         catch (Exception ex)
         {
            message = ex.Message;
            return Result.Failed;
         }
      }
   }
   #endregion

   #region Decrease Rod Length (x2)
   /// <summary>
   /// Implements the Revit add-in interface IExternalCommand
   /// </summary>
   [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
   [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
   public class HalveRodLength : IExternalCommand
   {
      /// <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 virtual Result Execute(ExternalCommandData commandData
          , ref string message, ElementSet elements)
      {
         try
         {
            // check user selection
            var uiDoc = commandData.Application.ActiveUIDocument;
            var doc = uiDoc.Document;
            Reference refObj = uiDoc.Selection.PickObject(ObjectType.Element, "Pick a fabrication part hanger to start.");
            var part = doc.GetElement(refObj) as FabricationPart;

            if (part == null || part.IsAHanger() == false)
            {
               message = "The selected element is not a fabrication part hanger.";
               return Result.Failed;
            }

            var rodInfo = part.GetRodInfo();
            if (rodInfo.IsAttachedToStructure == true)
            {
               message = "The hanger rods must be detached from their host first";
               return Result.Failed;
            }

            using (var trans = new Transaction(doc, "Halve Rod Length"))
            {
               trans.Start();

               for (int i = 0; i < rodInfo.RodCount; i++)
               {
                  var originalLength = rodInfo.GetRodLength(i);
                  rodInfo.SetRodLength(i, originalLength / 2.0);
               }
    
               trans.Commit();
            }

            return Result.Succeeded;
         }
         catch (Exception ex)
         {
            message = ex.Message;
            return Result.Failed;
         }
      }
   }
   #endregion

   #region Increase Rod Strcuture Extension (by 1ft)
   /// <summary>
   /// Implements the Revit add-in interface IExternalCommand
   /// </summary>
   [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
   [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
   public class IncreaseRodStructureExtension : IExternalCommand
   {
      /// <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 virtual Result Execute(ExternalCommandData commandData
          , ref string message, ElementSet elements)
      {
         try
         {
            // check user selection
            var uiDoc = commandData.Application.ActiveUIDocument;
            var doc = uiDoc.Document;
            Reference refObj = uiDoc.Selection.PickObject(ObjectType.Element, "Pick a fabrication part hanger to start.");
            var part = doc.GetElement(refObj) as FabricationPart;

            if (part == null || part.IsAHanger() == false)
            {
               message = "The selected element is not a fabrication part hanger.";
               return Result.Failed;
            }

            var rodInfo = part.GetRodInfo();
            if (rodInfo.IsAttachedToStructure == false)
            {
               message = "The hanger rods must be attached to structure.";
               return Result.Failed;
            }

            using (var trans = new Transaction(doc, "Increase Rod Structure Extension"))
            {
               trans.Start();

               for (int i = 0; i < rodInfo.RodCount; i++)
               {
                  var originalExtension = rodInfo.GetRodStructureExtension(i);
                  rodInfo.SetRodStructureExtension(i, originalExtension + 1.0);
               }

               trans.Commit();
            }

            return Result.Succeeded;
         }
         catch (Exception ex)
         {
            message = ex.Message;
            return Result.Failed;
         }
      }
   }
   #endregion

   #region Decrease Rod Strcuture Extension (by 1ft)
   /// <summary>
   /// Implements the Revit add-in interface IExternalCommand
   /// </summary>
   [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
   [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
   public class DecreaseRodStructureExtension : IExternalCommand
   {
      /// <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 virtual Result Execute(ExternalCommandData commandData
          , ref string message, ElementSet elements)
      {
         try
         {
            // check user selection
            var uiDoc = commandData.Application.ActiveUIDocument;
            var doc = uiDoc.Document;
            Reference refObj = uiDoc.Selection.PickObject(ObjectType.Element, "Pick a fabrication part hanger to start.");
            var part = doc.GetElement(refObj) as FabricationPart;

            if (part == null || part.IsAHanger() == false)
            {
               message = "The selected element is not a fabrication part hanger.";
               return Result.Failed;
            }

            var rodInfo = part.GetRodInfo();
            if (rodInfo.IsAttachedToStructure == false)
            {
               message = "The hanger rods must be attached to structure.";
               return Result.Failed;
            }

            using (var trans = new Transaction(doc, "Increase Rod Structure Extension"))
            {
               trans.Start();

               for (int i = 0; i < rodInfo.RodCount; i++)
               {
                  var originalExtension = rodInfo.GetRodStructureExtension(i);
                  rodInfo.SetRodStructureExtension(i, originalExtension - 1.0);
               }

               trans.Commit();
            }

            return Result.Succeeded;
         }
         catch (Exception ex)
         {
            message = ex.Message;
            return Result.Failed;
         }
      }
   }
   #endregion
}