using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Windows.Forms;
using HeuristicLab.DataImporter.Data.CommandBase;
using HeuristicLab.DataImporter.Data.Model;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.DataImporter.Data.Command {
  [StorableClass]
  public class ChangeValueCommand : ColumnCommandBase {
    [Storable]
    private int position;
    [Storable]
    private IComparable newValue;

    private IComparable oldValue;
    private ICollection<int> oldSortedColumnIndices;
    private IEnumerable<SortOrder> oldSortOrder;

    private ChangeValueCommand()
      : base(null, string.Empty, -1) {
    }

    public ChangeValueCommand(DataSet dataSet, string columnGroupName, int columnIndex, int position, IComparable newValue)
      : base(dataSet, columnGroupName, columnIndex) {
      this.position = position;
      this.newValue = newValue;
    }

    public override void Execute() {
      base.Execute();
      this.oldValue = Column.GetValue(position);
      Column.ChangeValueOrNull(position, newValue);
      oldSortedColumnIndices = new List<int>(ColumnGroup.SortedColumnIndexes);
      oldSortOrder = ColumnGroup.SortOrdersForColumns.ToList();
      ColumnGroup.ResetSorting();
      Column.FireChanged();
    }

    public override void UndoExecute() {
      base.UndoExecute();
      Column.ChangeValue(position, oldValue);
      ColumnGroup.SortOrdersForColumns = oldSortOrder;
      ColumnGroup.SortedColumnIndexes = oldSortedColumnIndices;
      oldSortedColumnIndices = null;
      oldSortOrder = null;
      Column.FireChanged();
      this.ColumnGroup = null;
    }

    public override string Description {
      get { return "Column value changed"; }
    }
  }
}