#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2014 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using HeuristicLab.MainForm;
using HeuristicLab.PluginInfrastructure;
using System;
using System.Threading;
using System.Windows.Forms;

namespace HeuristicLab.Optimization.Networks.Views {
  [View("ClientNode View")]
  [Content(typeof(ClientNode), true)]
  [Content(typeof(IClientNode), false)]
  public partial class ClientNodeView : EntityView {
    protected CancellationTokenSource tokenSource;
    protected int openCalls = 0;

    public new IClientNode Content {
      get { return (IClientNode)base.Content; }
      set { base.Content = value; }
    }

    public ClientNodeView() {
      InitializeComponent();
    }

    protected override void OnContentChanged() {
      base.OnContentChanged();

      if (tokenSource != null) tokenSource.Cancel();

      if (Content == null) {
        tokenSource = null;
        portCollectionView.Content = null;
        serviceParameterCollectionCollectionView.Content = null;
      } else {
        tokenSource = new CancellationTokenSource();
        portCollectionView.Content = Content.Ports;
        serviceParameterCollectionCollectionView.Content = Content.Calls;
      }
    }

    protected override void SetEnabledStateOfControls() {
      base.SetEnabledStateOfControls();
      callServicesButton.Enabled = Content != null && !ReadOnly;
      cancelServicesButton.Enabled = Content != null && !ReadOnly && openCalls > 0;
      portCollectionView.Enabled = Content != null && !ReadOnly;
      serviceParameterCollectionCollectionView.Enabled = Content != null && !ReadOnly;
    }

    protected virtual void callServicesButton_Click(object sender, EventArgs e) {
      openCalls++;
      cancelServicesButton.Enabled = Content != null && !ReadOnly && openCalls > 0;
      Content.CallServicesAsync(tokenSource.Token).ContinueWith(t => {
        Invoke(new Action(() => {
          openCalls--;
          cancelServicesButton.Enabled = Content != null && !ReadOnly && openCalls > 0;

          try {
            t.Wait();
          }
          catch (Exception ex) {
            ErrorHandling.ShowErrorDialog(this, ex);
          }
        }));
      });
    }
    protected virtual void cancelServicesButton_Click(object sender, EventArgs e) {
      tokenSource.Cancel();
      tokenSource = new CancellationTokenSource();
    }
  }
}