//
// (C) Copyright 2003-2012 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.
//
// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. AUTODESK, INC.
// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
// UNINTERRUPTED OR ERROR FREE.
//
// Use, duplication, or disclosure by the U.S. Government is subject to
// 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 System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Diagnostics;

namespace Revit.SDK.Samples.ProgressNotifier.CS
{
  /// <summary>
  /// Interaction logic for MainWindow.xaml
  /// </summary>
  public partial class MainWindow : Window
  {
    /// <summary>
    /// Constructor
    /// </summary>
    /// <param name="application"></param>
    public MainWindow( Autodesk.Revit.ApplicationServices.Application application )
    {
      InitializeComponent();
      m_application = application;
      m_progressStack = new ProgressStack();
      m_application.ProgressChanged += new EventHandler<Autodesk.Revit.DB.Events.ProgressChangedEventArgs>( RevitApp_ProgressChanged );
      m_application.DocumentOpened += new EventHandler<Autodesk.Revit.DB.Events.DocumentOpenedEventArgs>( RevitApp_DocumentOpened );
      m_cancel = false;
      m_receivedCancelEvent = false;
      m_previousEvent = null;
    }

    #region 'Event handlers for document opened and progress changed'
    void RevitApp_DocumentOpened( object sender, Autodesk.Revit.DB.Events.DocumentOpenedEventArgs e )
    {
      textBox_log.Text += "RevitApp_DocumentOpened: Cancellable:" + e.Cancellable.ToString() + " , IsCancelled: " + e.IsCancelled().ToString() + " , Status:" + e.Status.ToString() + Environment.NewLine;
      m_receivedCancelEvent = ( e.Status == Autodesk.Revit.DB.Events.RevitAPIEventStatus.Cancelled );
    }

    void RevitApp_ProgressChanged( object sender, Autodesk.Revit.DB.Events.ProgressChangedEventArgs e )
    {
      this.button_Cancel.IsEnabled = e.Cancellable;
      System.Windows.Forms.Application.DoEvents();

      if( m_cancel )
      {
        bool shouldCancel = e.Cancellable;
        if( e.IsCancelled() )
          textBox_log.Text += "!! We are already canceled!" + Environment.NewLine;

        try
        {
          e.Cancel();
          m_cancel = false;
        }
        catch( Exception ex )
        {
          textBox_log.Text += ( "Exception: " + ex.ToString() + Environment.NewLine + "'  Cancelable' value: " + shouldCancel + Environment.NewLine );
        }

      }



      ProgressItem itemReturn = m_progressStack.AddEventData( e );

      this.stackPanel_ProgressData.Children.Clear();
      List<string> progressItems = m_progressStack.ToStringList( 6 );
      foreach( string progressItem in progressItems )
      {
        TextBox tbProgressItem = new TextBox();
        tbProgressItem.Text = progressItem;
        this.stackPanel_ProgressData.Children.Add( tbProgressItem );
      }


      if( ( itemReturn.Stage == Autodesk.Revit.DB.Events.ProgressStage.RangeChanged ) || ( itemReturn.Stage == Autodesk.Revit.DB.Events.ProgressStage.UserCancelled ) )
      {
        string previousEventData = "null";
        if( m_previousEvent != null )
          previousEventData = m_previousEvent.ToString();

        //   textBox_log.Text += "Previous: "+  previousEventData + Environment.NewLine + "Current: " + itemReturn.ToString() + Environment.NewLine;
      }

      System.Windows.Forms.Application.DoEvents();

      m_previousEvent = itemReturn;


    }
    #endregion


    #region Handlers for 'Open' and 'Cancel' buttons
    private void Button_Open_Click( object sender, RoutedEventArgs e )
    {
      Microsoft.Win32.OpenFileDialog ofd = new Microsoft.Win32.OpenFileDialog();

      ofd.DefaultExt = ".rvt";
      ofd.Filter = "rvt files (*.rvt)|*.rvt|All files (*.*)|*.*";
      ofd.FilterIndex = 1;
      ofd.Title = "Open revit documents.";

      ofd.ShowDialog();
      if( !System.IO.File.Exists( ofd.FileName ) )
        return;

      label_FileName.Content = ofd.FileName;
      System.Windows.Forms.Application.DoEvents();
      Autodesk.Revit.DB.Document document = null;
      try
      {
        document = m_application.OpenDocumentFile( ofd.FileName );
        this.textBox_log.Text += "Opened filename = " + document.Title + Environment.NewLine;
      }
      catch( System.Exception ex )
      {
        if( m_receivedCancelEvent )
        {
          string isNull;
          if( document == null )
            isNull = " is null.";
          else
            isNull = " is not null.";

          this.textBox_log.Text += "Open Document has thrown an exception." + Environment.NewLine;
          this.textBox_log.Text += "We just got a cancel event, so this exception is likely from 'Open' being canceled. Returned document" + isNull + Environment.NewLine;
          m_receivedCancelEvent = false;
        }
        else
          this.textBox_log.Text += ex.ToString() + Environment.NewLine;
      }
    }

    private void button_Cancel_Click( object sender, RoutedEventArgs e )
    {
      m_cancel = true;
    }
    #endregion

    #region Data
    Autodesk.Revit.ApplicationServices.Application m_application;
    ProgressStack m_progressStack;
    bool m_cancel;

    private bool m_receivedCancelEvent;
    private ProgressItem m_previousEvent;
    #endregion
  }
}