#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2015 Joseph Helm and 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.Collections.Generic;
using System.Linq;
using System.Text;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Encodings.IntegerVectorEncoding;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Problems.BinPacking.Interfaces;

namespace HeuristicLab.Encodings.PackingEncoding.GroupingVector {
  [Item("Grouping Vector Encoding", "Represents an encoding for a bin packing problem using an array of group-assignments for every packing-item.")]
  [StorableClass]
  public class GroupingVectorEncoding : Item, IPackingSolutionEncoding{

    [Storable]
    public IntegerVector GroupingVector { get; set; }

    [StorableConstructor]
    protected GroupingVectorEncoding(bool deserializing) : base(deserializing) { }
    protected GroupingVectorEncoding(GroupingVectorEncoding original, Cloner cloner)
      : base(original, cloner) {
        this.GroupingVector = cloner.Clone(original.GroupingVector);
    }
    public override IDeepCloneable Clone(Cloner cloner) {
      return new GroupingVectorEncoding(this, cloner);
    }

    public GroupingVectorEncoding()
      : base() {
        GroupingVector = new IntegerVector();
    }

    public List<List<int>> GenerateSequenceMatrix() {
      List<List<int>> result = new List<List<int>>();
      int nrOfBins = GroupingVector.Max() + 1;
      for (int i = 0; i < nrOfBins; i++)
        result.Add(new List<int>());
      for (int i = 0; i < GroupingVector.Length; i++) {
        result[GroupingVector[i]].Add(i);
      }
      return result;
    }
    


    public override string ToString() {
      StringBuilder sb = new StringBuilder();
      sb.Append("[ ");
      sb.Append(GroupingVector.ToString());         
      sb.Append("]");
      return sb.ToString();
    }


    public override bool Equals(object obj) {
      if (obj.GetType() == typeof(GroupingVectorEncoding))
        return AreEqual(this, obj as GroupingVectorEncoding);

      return false;
    }
    public override int GetHashCode() {
      return GroupingVector.GetHashCode();
    }
    private static bool AreEqual(GroupingVectorEncoding groupingVectorEncoding1, GroupingVectorEncoding groupingVectorEncoding2) {
      return AreEqual(groupingVectorEncoding1.GroupingVector, groupingVectorEncoding2.GroupingVector);
    }

    private static bool AreEqual(IntArray v1, IntArray v2) {
      if (v1.Length != v2.Length)
        return false;
      for (int i = 0; i < v1.Length; i++) {
        if (v1[i] != v2[i])
          return false;
      }
      return true;
    }
  }
}