#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2012 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.Text;
using System.Windows.Forms;
using HeuristicLab.Core;
using HeuristicLab.MainForm;
using HeuristicLab.Persistence.Core;
using HeuristicLab.Persistence.Default.Xml;
using HeuristicLab.PluginInfrastructure;
using ICSharpCode.SharpZipLib.Zip;

namespace HeuristicLab.Problems.DataAnalysis.Views {
  [View("RegressionSolution View")]
  [Content(typeof(RegressionSolutionBase), false)]
  public partial class RegressionSolutionView : DataAnalysisSolutionView {
    public RegressionSolutionView() {
      InitializeComponent();
    }

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

    #region drag and drop
    protected override void itemsListView_DragEnter(object sender, DragEventArgs e) {
      validDragOperation = false;
      if (ReadOnly) return;

      var dropData = e.Data.GetData(HeuristicLab.Common.Constants.DragDropDataFormat);
      if (dropData is RegressionProblemData) validDragOperation = true;
      else if (dropData is IValueParameter) {
        var param = (IValueParameter)dropData;
        if (param.Value is RegressionProblemData) validDragOperation = true;
      }
    }
    #endregion

    protected void importButton_Click(object sender, EventArgs e) {
      if (Locked || ReadOnly || Content == null) {
        MessageBox.Show("The Regression Solution is read-only or locked. Save the solution and open it again or use " +
          "the 'Simplify' button to get a copy of the current solution. Import will then be enabled.");
        return;
      }
      if (openFileDialog.ShowDialog(this) != DialogResult.OK) return;
      ImportProblemData(openFileDialog.FileName);
    }

    protected void ImportProblemData(string filename) {
      object hlFile = null;
      try {
        hlFile = XmlParser.Deserialize(filename);
      }
      catch (PersistenceException ex) {
        ErrorHandling.ShowErrorDialog(this, ex);
        return;
      }
      catch (ZipException ex) {
        ErrorHandling.ShowErrorDialog(this, ex);
        return;
      }

      IRegressionProblemData problemData = null;
      if (hlFile is IRegressionProblemData) {
        problemData = (IRegressionProblemData)hlFile;
      } else if (hlFile is IRegressionProblem) {
        problemData = ((IRegressionProblem)hlFile).ProblemData;
      } else if (hlFile is IRegressionSolution) {
        problemData = ((IRegressionSolution)hlFile).ProblemData;
      }

      if (problemData == null) {
        ErrorHandling.ShowErrorDialog(this, new NullReferenceException("The problem data is null." + Environment.NewLine
                                                                     + "The .hl-file is no RegressionProblemData or RegressionProblem."));
        return;
      }

      if (CheckCompatibilityOfProblemData(Content.ProblemData, problemData))
        Content.ProblemData = problemData;
    }

    protected virtual bool CheckCompatibilityOfProblemData(IRegressionProblemData iRegressionProblemData, IRegressionProblemData problemData) {
      StringBuilder message = new StringBuilder();
      if (!problemData.TargetVariable.Equals(Content.ProblemData.TargetVariable))
        message.AppendLine("The target variables are not matching. Old target variable: '"
                         + Content.ProblemData.TargetVariable
                         + "'. New targetvariable: '" + problemData.TargetVariable + "'");

      List<string> variables = problemData.InputVariables.Select(x => x.Value).ToList();
      foreach (var item in Content.ProblemData.InputVariables.CheckedItems) {
        if (!variables.Contains(item.Value.Value))
          message.AppendLine("Input variable '" + item.Value.Value + "' is not in the new problem data.");
      }

      if (message.Length != 0) {
        ErrorHandling.ShowErrorDialog(this, new InvalidOperationException(message.ToString()));
        return false;
      }
      return true;
    }
  }
}