#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 System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Windows.Forms;
using HeuristicLab.Core.Views;
using HeuristicLab.Data;
using HeuristicLab.MainForm;
using HeuristicLab.Optimization;
using HeuristicLab.Optimization.Views;

namespace HeuristicLab.Problems.DataAnalysis.Symbolic.Views {
  [View("Sliding Window Best Solutions View")]
  [Content(typeof(SlidingWindowBestSolutionsCollection), true)]
  public partial class SlidingWindowBestSolutionsCollectionView : ItemView {
    public new SlidingWindowBestSolutionsCollection Content {
      get { return (SlidingWindowBestSolutionsCollection)base.Content; }
      set { base.Content = value; }
    }

    protected override void OnContentChanged() {
      base.OnContentChanged();
      if (Content != null) {
        switch (Content.QualityMeasure) {
          case SlidingWindowBestSolutionsCollection.QualityMeasures.PEARSON:
            comboBox1.SelectedIndex = comboBox1.Items.IndexOf("Pearson R2");
            break;
          case SlidingWindowBestSolutionsCollection.QualityMeasures.MSE:
            comboBox1.SelectedIndex = comboBox1.Items.IndexOf("Mean Squared Error");
            break;
        }
        if (Content.SlidingWindowQualities != null) {
          SetMatrixContent(Content.SlidingWindowQualities);
        } else if (!Content.QualitiesCalculationInProgress) {
          Content.CalculateQualities();
        }
      }
    }

    private readonly Progress progress;

    protected override void DeregisterContentEvents() {
      // TODO: Deregister your event handlers here
      enhancedStringConvertibleMatrixView.DataGridView.CellDoubleClick -= enhancedStringConvertibleMatrixView_cellDoubleClick;
      Content.QualitiesCalculationCompleted -= bestSolutionsCollectionQualitiesCalculated;
      Content.QualitiesCalculationProgress -= bestSolutionCollectionQualitiesCalculationProgress;
      Content.QualitiesUpdated -= bestSolutionCollectionQualitiesUpdated;
      Content.QualitiesCalculationStarted -= bestSolutionsCollectionQualtiesCalculationStarted;
      base.DeregisterContentEvents();
    }

    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      // TODO: Register your event handlers here
      enhancedStringConvertibleMatrixView.DataGridView.CellDoubleClick += enhancedStringConvertibleMatrixView_cellDoubleClick;
      Content.QualitiesCalculationCompleted += bestSolutionsCollectionQualitiesCalculated;
      Content.QualitiesCalculationProgress += bestSolutionCollectionQualitiesCalculationProgress;
      Content.QualitiesUpdated += bestSolutionCollectionQualitiesUpdated;
      Content.QualitiesCalculationStarted += bestSolutionsCollectionQualtiesCalculationStarted;
    }

    public SlidingWindowBestSolutionsCollectionView() {
      InitializeComponent();
      progress = new Progress();
      MainFormManager.GetMainForm<MainForm.WindowsForms.MainForm>().AddOperationProgressToView(this, progress);
    }

    #region Event Handlers (Content)
    private void bestSolutionsCollectionQualtiesCalculationStarted(object sender, EventArgs e) {
      progress.Start("Calculating best solutions qualities...");
    }

    private void bestSolutionsCollectionQualitiesCalculated(object sender, RunWorkerCompletedEventArgs e) {
      if (e.Cancelled || e.Error != null) {
        progress.Cancel();
        return;
      }

      SetMatrixContent(Content.SlidingWindowQualities);
      progress.Finish();
    }

    private void bestSolutionCollectionQualitiesCalculationProgress(object sender, ProgressChangedEventArgs e) {
      progress.ProgressValue = e.ProgressPercentage / 100.0;
    }

    private void bestSolutionCollectionQualitiesUpdated(object sender, EventArgs e) {
      SetMatrixContent(Content.SlidingWindowQualities);
    }
    #endregion

    protected override void SetEnabledStateOfControls() {
      base.SetEnabledStateOfControls();
      // TODO: Enable or disable controls based on whether the content is null or the view is set readonly
    }

    private void SetMatrixContent(double[,] values) {
      var qualitiesMap = new DoubleMatrix(values); // add an extra columns for the training data
      qualitiesMap.ColumnNames = Enumerable.Range(0, qualitiesMap.Columns - 1).Select(x => Content.SlidingWindowRanges[x].Start + " - " + Content.SlidingWindowRanges[x].End).Concat(new List<string> { "Training" });
      qualitiesMap.RowNames = Enumerable.Range(1, qualitiesMap.Rows).Select(x => "M" + x);
      double min = 0, max = 0;
      if (Content.QualityMeasure == SlidingWindowBestSolutionsCollection.QualityMeasures.PEARSON) {
        max = 1.0;
      } else {
        foreach (var q in qualitiesMap) {
          if (min > q) min = q;
          if (max < q) max = q;
        }
      }

      enhancedStringConvertibleMatrixView.Minimum = min;
      enhancedStringConvertibleMatrixView.Maximum = max;
      enhancedStringConvertibleMatrixView.Content = qualitiesMap;
    }

    #region Event Handlers (child controls)
    private void comboBox1_SelectedIndexChanged(object sender, System.EventArgs e) {
      var combobox = (ComboBox)sender;
      switch ((string)combobox.SelectedItem) {
        case "Pearson R2": {
            Content.QualityMeasure = SlidingWindowBestSolutionsCollection.QualityMeasures.PEARSON;
            break;
          }
        case "Mean Squared Error": {
            Content.QualityMeasure = SlidingWindowBestSolutionsCollection.QualityMeasures.MSE;
            break;
          }
      }
    }

    public void enhancedStringConvertibleMatrixView_cellDoubleClick(object sender, DataGridViewCellEventArgs e) {
      var dataGridView = (DataGridView)sender;
      var cell = dataGridView.SelectedCells[0];
      var bestSolutions = Content.SlidingWindowBestSolutions.Values.ToList();
      var tree = bestSolutions[cell.RowIndex];
      var model = Content.CreateModel(tree, Content.Interpreter);
      var solution = Content.CreateSolution(model, Content.ProblemData);
      var result = new Result("Sliding Window Solution", solution);
      var view = MainFormManager.MainForm.ShowContent(result, typeof(ResultView));
      if (view != null) {
        view.ReadOnly = ReadOnly;
        view.Locked = Locked;
      }
    }
    #endregion
  }
}