#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.Collections.Generic;
using System.Linq;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.DataImporter.Data.Model {
  [StorableClass]
  public class DataSet {

    [Storable]
    private List<ColumnGroup> columnGroups;
    public IEnumerable<ColumnGroup> ColumnGroups {
      get { return this.columnGroups; }
    }
    [StorableConstructor]
    protected DataSet(bool deserializing) : base() { }
    public DataSet() {
      this.columnGroups = new List<ColumnGroup>();
    }

    public event EventHandler Changed;
    protected virtual void OnChanged() {
      if (this.Changed != null)
        this.Changed(this, EventArgs.Empty);
    }
    public void FireChanged() {
      this.OnChanged();
    }

    public void AddColumnGroup(ColumnGroup columnGroup) {
      this.CheckColumnGroupName(columnGroup);
      this.columnGroups.Add(columnGroup);
    }

    public void AddColumnGroups(IEnumerable<ColumnGroup> columnGroups) {
      foreach (ColumnGroup columnGroup in columnGroups) {
        this.CheckColumnGroupName(columnGroup);
      }
      this.columnGroups.AddRange(columnGroups);
    }

    private void CheckColumnGroupName(ColumnGroup columnGroup) {
      int i = 0;
      string columnGroupName = columnGroup.Name;
      while (this.ColumnGroups.Any(cg => cg.Name == columnGroupName && cg != columnGroup)) {
        i++;
        columnGroupName = columnGroup.Name + " " + i;
      }
      columnGroup.Name = columnGroupName;
    }

    public void InsertColumnGroup(int position, ColumnGroup columnGroup) {
      this.CheckColumnGroupName(columnGroup);
      this.columnGroups.Insert(position, columnGroup);
    }

    public void ReplaceColumnGroup(int position, ColumnGroup columnGroup) {
      this.columnGroups[position] = columnGroup;
      this.CheckColumnGroupName(columnGroup);
    }

    public void RemoveColumnGroup(ColumnGroup columnGroup) {
      this.columnGroups.Remove(columnGroup);
    }

    public int IndexOfColumnGroup(ColumnGroup columnGroup) {
      return this.columnGroups.IndexOf(columnGroup);
    }

    public ColumnGroup GetColumnGroup(string columnGroupName) {
      IEnumerable<ColumnGroup> groups = this.columnGroups.Where(g => g.Name == columnGroupName);
      if (groups.Count() != 1)
        throw new InvalidOperationException("Found 0 or more than 1 column group with the name \"" + columnGroupName + "\".");
      return groups.First();

    }

    public IEnumerable<ColumnGroup> ActiveColumnGroups {
      get {
        return this.columnGroups.Where(cg => cg.Active);
      }
    }
  }
}