#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2018 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 System;
using System.ComponentModel;
using System.Linq;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;
using HeuristicLab.Collections;
using HeuristicLab.Core.Views;
using HeuristicLab.MainForm;
using HeuristicLab.MainForm.WindowsForms;

namespace HeuristicLab.Problems.GeneralizedQuadraticAssignment.Views {
  [View("GQAPAssignmentArchiveView")]
  [Content(typeof(GQAPAssignmentArchive), IsDefaultView = true)]
  public partial class GQAPAssignmentArchiveView : ItemView {
    public new GQAPAssignmentArchive Content {
      get { return (GQAPAssignmentArchive)base.Content; }
      set { base.Content = value; }
    }

    public GQAPAssignmentArchiveView() {
      InitializeComponent();
    }

    #region Register Content Events
    protected override void DeregisterContentEvents() {
      Content.PropertyChanged -= new PropertyChangedEventHandler(Content_PropertyChanged);
      Content.Solutions.CollectionReset -= new CollectionItemsChangedEventHandler<IndexedItem<GQAPSolution>>(ContentSolutions_Changed);
      Content.Solutions.ItemsAdded -= new CollectionItemsChangedEventHandler<IndexedItem<GQAPSolution>>(ContentSolutions_Changed);
      Content.Solutions.ItemsRemoved -= new CollectionItemsChangedEventHandler<IndexedItem<GQAPSolution>>(ContentSolutions_Changed);
      base.DeregisterContentEvents();
    }
    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      Content.PropertyChanged += new PropertyChangedEventHandler(Content_PropertyChanged);
      Content.Solutions.CollectionReset += new CollectionItemsChangedEventHandler<IndexedItem<GQAPSolution>>(ContentSolutions_Changed);
      Content.Solutions.ItemsAdded += new CollectionItemsChangedEventHandler<IndexedItem<GQAPSolution>>(ContentSolutions_Changed);
      Content.Solutions.ItemsRemoved += new CollectionItemsChangedEventHandler<IndexedItem<GQAPSolution>>(ContentSolutions_Changed);
    }

    private void ContentSolutions_Changed(object sender, CollectionItemsChangedEventArgs<IndexedItem<GQAPSolution>> e) {
      UpdateParetoFront();
    }

    private void Content_PropertyChanged(object sender, PropertyChangedEventArgs e) {
      UpdateParetoFront();
    }
    #endregion

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

    protected override void SetEnabledStateOfControls() {
      base.SetEnabledStateOfControls();
    }

    private void UpdateParetoFront() {
      if (InvokeRequired) Invoke((Action)UpdateParetoFront);
      else {
        paretoFrontChart.Series[0].Points.SuspendUpdates();
        try {
          paretoFrontChart.Series[0].Points.Clear();
          if (Content == null) return;
          foreach (var solution in Content.Solutions) {
            if (solution.Evaluation.ExcessDemand <= 0.0) {
              paretoFrontChart.Series[0].Points.AddXY(solution.Evaluation.FlowCosts, solution.Evaluation.InstallationCosts);
              paretoFrontChart.Series[0].Points.Last().Tag = solution;
            }
          }
        } finally {
          paretoFrontChart.Series[0].Points.ResumeUpdates();
          messageLabel.Visible = paretoFrontChart.Series[0].Points.Count == 0;
        }
      }
    }

    private void paretoFrontChart_MouseDoubleClick(object sender, MouseEventArgs e) {
      HitTestResult h = paretoFrontChart.HitTest(e.X, e.Y, ChartElementType.DataPoint);
      if (h.ChartElementType == ChartElementType.DataPoint) {
        var solution = (GQAPSolution)((DataPoint)h.Object).Tag;
        var assignment = new GQAPAssignment(solution.Assignment, Content.ProblemInstance, solution.Evaluation);

        var view = MainFormManager.MainForm.ShowContent(assignment);
        if (view != null) {
          view.ReadOnly = this.ReadOnly;
          view.Locked = this.Locked;
        }
      }
    }
  }
}