#region License Information

/* HeuristicLab
 * Copyright (C) 2002-2016 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.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using HeuristicLab.Core;
using HeuristicLab.MainForm;
using HeuristicLab.Optimization;
using HeuristicLab.Optimization.Views;
using HeuristicLab.Problems.DataAnalysis;

namespace HeuristicLab.DatastreamAnalysis {
  [View("DatastreamAnalysisOptimizer View", "")]
  [Content(typeof(DatastreamAnalysisOptimizer), true)]
  public partial class DatastreamAnalysisOptimizerView : IOptimizerView {
    public DatastreamAnalysisOptimizerView() {
      InitializeComponent();
      Content = new DatastreamAnalysisOptimizer();
    }

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

    //protected override void Dispose(bool disposing) {
    //  if (disposing) {
    //    if (components != null) components.Dispose();
    //  }
    //  base.Dispose(disposing);
    //}

    protected override void OnInitialized(EventArgs e) {
      // set order of tab pages according to z order.
      // NOTE: this is required due to a bug in the VS designer.
      List<Control> tabPages = new List<Control>();
      for (int i = 0; i < tabControl.Controls.Count; i++) {
        tabPages.Add(tabControl.Controls[i]);
      }
      tabControl.Controls.Clear();
      foreach(Control control in tabPages)
        tabControl.Controls.Add(control);

      base.OnInitialized(e);
    }

    protected override void OnContentChanged() {
      base.OnContentChanged();
      if (Content == null) {
        ensemblesViewHost.Content = null;
        datastreamViewHost.Content = null;
        resultsView.Content = null;
        runsView.Content = null;
      } else {
        ensemblesViewHost.ViewType = null;
        ensemblesViewHost.Content = Content.Ensembles;
        datastreamViewHost.ViewType = null;
        datastreamViewHost.Content = Content.Datastream;
        resultsView.Content = Content.Results.AsReadOnly();
        runsView.Content = Content.Runs;
      }
    }

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

      resultsView.Enabled = Content != null;
      runsView.Enabled = Content != null;
    }

    protected override void OnClosed(FormClosedEventArgs e) {
      if ((Content != null) && (Content.ExecutionState == ExecutionState.Started)) {
        //The content must be stopped if no other view showing the content is available
        var optimizers =
          MainFormManager.MainForm.Views.OfType<IContentView>()
            .Where(v => v != this)
            .Select(v => v.Content)
            .OfType<IOptimizer>();
        if (!optimizers.Contains(Content)) {
          var nestedOptimizers = optimizers.SelectMany(opt => opt.NestedOptimizers);
          if (!nestedOptimizers.Contains(Content)) Content.Stop();
        }
      }
      base.OnClosed(e);
    }

    //protected override void startButton_Click(object sender, EventArgs e) {
    //  base.startButton_Click(sender, e);
    //}

    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      Content.EnsemblesChanged += new EventHandler(Content_EnsemblesChanged);
      Content.DatastreamChanged += new EventHandler(Content_DatastreamChanged);
    }

    protected override void DeregisterContentEvents() {
      Content.EnsemblesChanged -= new EventHandler(Content_EnsemblesChanged);
      Content.DatastreamChanged -= new EventHandler(Content_DatastreamChanged);

      base.DeregisterContentEvents();
    }

    #region content events
    protected override void Content_Prepared(object sender, EventArgs e) {
      if (InvokeRequired)
        Invoke(new EventHandler(Content_Prepared), sender, e);
      else {
        base.Content_Prepared(sender,e);
        resultsView.Content = Content.Results.AsReadOnly();
      }
    }

    protected void Content_EnsemblesChanged(object sender, EventArgs e) {
      if (InvokeRequired)
        Invoke(new EventHandler(Content_EnsemblesChanged), sender, e);
      else {
        ensemblesViewHost.ViewType = null;
        ensemblesViewHost.Content = Content.Ensembles;
      }
    }

    protected void Content_DatastreamChanged(object sender, EventArgs e) {
      if (InvokeRequired)
        Invoke(new EventHandler(Content_DatastreamChanged), sender, e);
      else {
        if (datastreamViewHost.Content != null && Content.Datastream != null &&
            datastreamViewHost.Content.GetType() != Content.Datastream.GetType())
          datastreamViewHost.ViewType = null;
        datastreamViewHost.Content = Content.Datastream;
      }
    }
    #endregion

    #region event handlers
    private void ensemblesTab_DragDrop(object sender, DragEventArgs e) {
      if (e.Data.GetDataPresent(HeuristicLab.Common.Constants.DragDropDataFormat)) {
        try {
          var data = e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat);
          if (data is IProxyEnsembleModel) {
            data = (IProxyEnsembleModel) data;
            Content.Ensembles.Add((ProxyEnsembleModel) data);
          }
        }
        catch (Exception ex) {
          MessageBox.Show(ex.Message, "Set ensembles", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
      }
    }

    private void ensemblesTab_DragEnterOver(object sender, DragEventArgs e) {
      e.Effect = DragDropEffects.None;
      if (ReadOnly || !e.Data.GetDataPresent(HeuristicLab.Common.Constants.DragDropDataFormat))
        return;

      var data = e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat);

      if (data is IProxyEnsembleModel) {
        if ((e.KeyState & 32) == 32) e.Effect = DragDropEffects.Link; // ALT key
        else if ((e.KeyState & 4) == 4) e.Effect = DragDropEffects.Move; // SHIFT key
        else if (e.AllowedEffect.HasFlag(DragDropEffects.Copy)) e.Effect = DragDropEffects.Copy;
        else if (e.AllowedEffect.HasFlag(DragDropEffects.Move)) e.Effect = DragDropEffects.Move;
        else if (e.AllowedEffect.HasFlag(DragDropEffects.Link)) e.Effect = DragDropEffects.Link;
      }
    }

    private void datastreamTab_DragDrop(object sender, DragEventArgs e) {
      if (e.Data.GetDataPresent(HeuristicLab.Common.Constants.DragDropDataFormat)) {
        try {
          var data = e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat);
          if (data is IValueParameter) data = ((IValueParameter) data).Value;
          if (data is IRegressionProblemData)
            Content.Datastream.ProblemData = (RegressionProblemData) data;
        }
        catch (Exception ex) {
          MessageBox.Show(ex.Message, "Set datastream", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
      }
    }

    private void datastreamTab_DragEnterOver(object sender, DragEventArgs e) {
      e.Effect = DragDropEffects.None;

      if (ReadOnly || !e.Data.GetDataPresent(HeuristicLab.Common.Constants.DragDropDataFormat))
        return;

      var data = e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat);
      if (data is IValueParameter) data = ((IValueParameter) data).Value;
      if (data is IRegressionProblemData) {
        if ((e.KeyState & 32) == 32) e.Effect = DragDropEffects.Link; // ALT key
        else if ((e.KeyState & 4) == 4) e.Effect = DragDropEffects.Move; // SHIFT key
        else if (e.AllowedEffect.HasFlag(DragDropEffects.Copy)) e.Effect = DragDropEffects.Copy;
        else if (e.AllowedEffect.HasFlag(DragDropEffects.Move)) e.Effect = DragDropEffects.Move;
        else if (e.AllowedEffect.HasFlag(DragDropEffects.Link)) e.Effect = DragDropEffects.Link;
      }
    }

    #endregion event handlers
  }
}