#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2008 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.Windows.Forms;
using HeuristicLab.Core;

namespace HeuristicLab.DataAnalysis {
  public partial class DatasetView : ViewBase {

    private OpenFileDialog openFileDialog;

    public Dataset Dataset {
      get { return (Dataset)Item; }
      set {
        Item = value;
        Item.Changed += new EventHandler(Item_Changed);
      }
    }

    void Item_Changed(object sender, EventArgs e) {
      Refresh();
    }

    public DatasetView() : base() {
      InitializeComponent();
      openFileDialog = new OpenFileDialog();
    }

    public DatasetView(Dataset dataset) :this() {
      this.Dataset = dataset;
    }

    protected override void UpdateControls() {
      base.UpdateControls();
      if(Dataset != null) {
        int rows = Dataset.Rows;
        int columns = Dataset.Columns;

        nameTextBox.Text = Dataset.Name;
        rowsTextBox.Text = rows + "";
        columnsTextBox.Text = columns + "";
        dataGridView.ColumnCount = columns;
        dataGridView.RowCount = rows;
        for(int i = 0; i < rows; i++) {
          for(int j = 0; j < columns; j++) {
            dataGridView.Rows[i].Cells[j].Value = Dataset.GetValue(i, j);
          }
        }
        if (Dataset.VariableNames.Length == dataGridView.Columns.Count) {
          for (int i = 0; i < columns; i++) {
            dataGridView.Columns[i].Name = Dataset.VariableNames[i];
          }
        } else {
          for (int i = 0; i < columns; i++) {
            dataGridView.Columns[i].Name = "Var" + i;
          }
        }

      } else {
        rowsTextBox.Text = "1";
        columnsTextBox.Text = "1";
        dataGridView.ColumnCount = 1;
        dataGridView.RowCount = 1;
      }
    }

    private void dataGridView_CellValidating(object sender, DataGridViewCellValidatingEventArgs e) {
      if(ValidateData((string)e.FormattedValue)) {
        SetArrayElement(e.RowIndex, e.ColumnIndex, (string)e.FormattedValue);
        e.Cancel = false;
      } else {
        e.Cancel = true;
      }
    }


    private void SetArrayElement(int row, int column, string element) {
      double result;
      double.TryParse(element, out result);
      if(result != Dataset.GetValue(row, column)) {
        Dataset.SetValue(row, column, result);
        Dataset.FireChanged();
      }
    }

    private bool ValidateData(string element) {
      double result;
      return element != null && double.TryParse(element, out result);
    }
  }
}