#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2011 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 System.Xml;
using HeuristicLab.DataImporter.Data.CommandBase;
using HeuristicLab.DataImporter.Data.Model;
using HeuristicLab.DataImporter.Data;
using HeuristicLab.DataImporter.Command.View;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.DataImporter.Command {
  [StorableClass]
  [ViewableCommandInfoAttribute("Set Part of DateTime", 1, ColumnGroupState.DateTimeColumnSelected, "Time Series",
Position = 2, SelectedColumns = 1, OptionsView = typeof(TimeBasedWithoutOffsetCommandView))]
  public class SetPartOfDateTimeCommand : ColumnGroupCommandWithAffectedColumnsBase {
    private DateTimeColumn oldColumn;
    private ICollection<int> oldSortedColumnIndices;
    private IEnumerable<SortOrder> oldSortOrder;

    private SetPartOfDateTimeCommand()
      : base(null, string.Empty, null) {
    }

    public SetPartOfDateTimeCommand(DataSet dataSet, string columnGroupName, int[] affectedColumns)
      : base(dataSet, columnGroupName, affectedColumns) {
    }

    [Storable]
    private DateTimeSpan dateTimePart;
    public DateTimeSpan DateTimePart {
      get { return this.dateTimePart; }
      set { this.dateTimePart = value; }
    }

    public override string Description {
      get { return "Set specific part of datetime"; }
    }

    public override void Execute() {
      base.Execute();
      oldColumn = (DateTimeColumn)ColumnGroup.GetColumn(AffectedColumns[0]);
      DateTimeColumn newColumn = (DateTimeColumn)oldColumn.CreateCopyOfColumnWithoutValues();
      DateTime? value;
      DateTimeSpan newValue;
      oldSortedColumnIndices = new List<int>(ColumnGroup.SortedColumnIndexes);
      oldSortOrder = ColumnGroup.SortOrdersForColumns.ToList();

      for (int i = 0; i < oldColumn.TotalValuesCount; i++) {
        newValue = (DateTimeSpan)dateTimePart.Clone();
        value = (DateTime?)oldColumn.GetValue(i);
        if (value != null) {
          if (newValue.Seconds == -1)
            newValue.Seconds = value.Value.Second;
          if (newValue.Minutes == -1)
            newValue.Minutes = value.Value.Minute;
          if (newValue.Hours == -1)
            newValue.Hours = value.Value.Hour;
          if (newValue.Days == -1)
            newValue.Days = value.Value.Day;
          if (newValue.Months == -1)
            newValue.Months = value.Value.Month;
          if (newValue.Years == -1)
            newValue.Years = value.Value.Year;

          newColumn.AddValue(new DateTime(newValue.Years, newValue.Months, newValue.Days, newValue.Hours, newValue.Minutes, newValue.Seconds));
        } else
          newColumn.AddValue(null);
      }
      ColumnGroup.ReplaceColumn(AffectedColumns[0], newColumn);
      ColumnGroup.FireChanged();
      this.ColumnGroup = null;
    }

    public override void UndoExecute() {
      base.UndoExecute();
      ColumnGroup.ReplaceColumn(AffectedColumns[0], oldColumn);
      ColumnGroup.SortOrdersForColumns = oldSortOrder;
      ColumnGroup.SortedColumnIndexes = oldSortedColumnIndices;
      oldSortedColumnIndices = null;
      oldSortOrder = null;
      oldColumn = null;
      ColumnGroup.FireChanged();
      this.ColumnGroup = null;
    }
  }
}