#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2013 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.Linq;
using HeuristicLab.DataImporter.Data.CommandBase;
using HeuristicLab.DataImporter.Data.Model;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.DataImporter.Command {
  [StorableClass]
  public abstract class AddNewColumnCommandBase : ColumnGroupCommandBase {
    [StorableConstructor]
    protected AddNewColumnCommandBase(bool deserializing) : base(deserializing) { }

    protected AddNewColumnCommandBase(DataSet dataSet, string columnGroupName, string columnName, Type columnType)
      : base(dataSet, columnGroupName) {
      this.ColumnName = columnName;
      if (!columnType.IsSubclassOf(typeof(ColumnBase)) || columnType == null)
        throw new CommandExecutionException("Added Column must be a subtype of ColumnBase", this);
      this.ColumnType = columnType;
    }

    private ColumnBase newColumn;
    protected ColumnBase NewColumn {
      get { return this.newColumn; }
      set { this.newColumn = value; }
    }

    [Storable]
    private int columnIndex = -1;
    protected int ColumnIndex {
      get { return this.columnIndex; }
      set { this.columnIndex = value; }
    }

    [Storable]
    private string columnName;
    protected string ColumnName {
      get { return this.columnName; }
      set { this.columnName = value; }
    }

    [Storable]
    private Type columnType;
    protected Type ColumnType {
      get { return this.columnType; }
      set { this.columnType = value; }
    }

    public override void Execute() {
      base.Execute();
      newColumn = (ColumnBase)Activator.CreateInstance(ColumnType, new object[] { this.ColumnName });
      newColumn.Resize(ColumnGroup.RowCount);

      if (ColumnIndex == -1) {
        ColumnBase cb = ColumnGroup.Columns.FirstOrDefault(x => x.Selected);
        if (cb != null) ColumnIndex = ColumnGroup.IndexOfColumn(cb);
      }
      if (ColumnIndex != -1) {
        ColumnGroup.InsertColumn(ColumnIndex + 1, NewColumn);
      } else {
        ColumnGroup.AddColumn(NewColumn);
      }
      ColumnGroup.FireChanged();
      ColumnGroup = null;
    }

    public override void UndoExecute() {
      base.UndoExecute();
      ColumnGroup.RemoveColumn(NewColumn);
      newColumn = null;
      ColumnGroup.FireChanged();
      ColumnGroup = null;
    }
  }
}