#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;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Encodings.PermutationEncoding;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Problems.BinPacking;


namespace HeuristicLab.Encodings.PackingEncoding.PackingSequence {
  [Item("Swap2 Move", "A move on a Sequence vector that is specified by two group-assignment-indexes.")]
  [StorableClass]
  public class Swap2Move : SequenceMove, IPackingMove<Permutation> {
    [Storable]
    public int Index1 { get; protected set; }
    [Storable]
    public int Index2 { get; protected set; }

    [StorableConstructor]
    protected Swap2Move(bool deserializing) : base(deserializing) { }
    protected Swap2Move(Swap2Move original, Cloner cloner)
      : base(original, cloner) {
      this.Index1 = original.Index1;
      this.Index2 = original.Index2;
    }
    public Swap2Move(int index1, int index2, Permutation packingSequence)
      : base(packingSequence) {
      Index1 = index1;
      Index2 = index2;
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      return new Swap2Move(this, cloner);
    }

    public override Permutation GetSolutionAfterMove() {
      Permutation newSolution = (Permutation)PackingSequence.Clone(new Cloner());
      newSolution[Index1] = PackingSequence[Index2];
      newSolution[Index2] = PackingSequence[Index1];
      return newSolution;
    }

    public override Type GetMoveAttributeType() {
      return typeof(Swap2MoveAttribute);
    }

    public override SequenceMoveAttribute GetAttribute(double quality) {
      return new Swap2MoveAttribute(Index1, Index2, PackingSequence[Index1], PackingSequence[Index2], quality);
    }

    public override bool BelongsToAttribute(SequenceMoveAttribute attribute, bool hardCriterion) {
      var attr = attribute as Swap2MoveAttribute;
      if (attr != null) {
        if (hardCriterion) {
          if (Index1 == attr.Index1 || Index2 == attr.Index2)// || PackingSequence.PackingSequence[Index1] == attr.AssignedBin1 || PackingSequence.PackingSequence[Index2] == attr.AssignedBin2)
            return true;
        } else
          if (Index1 == attr.Index1 && Index2 == attr.Index2)// && PackingSequence.PackingSequence[Index1] == attr.AssignedBin1 && PackingSequence.PackingSequence[Index2] == attr.AssignedBin2)
            return true;
      }
      return false;
    }

    public override string ToString() {
      return "SGM(i1="+Index1 + ", i2=" + Index2  +")";
    }
  }
}