#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2010 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 HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Encodings.PermutationEncoding;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using System.Collections.Generic;
using HeuristicLab.Problems.VehicleRouting.Encodings.General;
using HeuristicLab.Problems.VehicleRouting.Interfaces;

namespace HeuristicLab.Problems.VehicleRouting.Encodings.Alba {
  [Item("AlbaEncoding", "Represents an Alba encoding of VRP solutions. It is implemented as described in Alba, E. and Dorronsoro, B. (2004). Solving the Vehicle Routing Problem by Using Cellular Genetic Algorithms.")]
  [StorableClass]
  public class AlbaEncoding : PermutationEncoding {   
    #region IVRPEncoding Members
    public override List<Tour> GetTours() {
      List<Tour> result = new List<Tour>();

      int cities = ProblemInstance.Cities.Value;
      
      Tour tour = new Tour();
      for (int i = 0; i < this.array.Length; i++) {
        if (this.array[i] >= cities) {
          if (tour.Stops.Count > 0) {
            result.Add(tour);

            tour = new Tour();
          }
        } else {
          tour.Stops.Add(this.array[i] + 1);
        }
      }

      if (tour.Stops.Count > 0) {
        result.Add(tour);
      }   

      return result;
    }
    #endregion

    public override IDeepCloneable Clone(HeuristicLab.Common.Cloner cloner) {
      AlbaEncoding clone = new AlbaEncoding(
        new Permutation(this.PermutationType, this.array), 
        (IVRPProblemInstance)cloner.Clone(ProblemInstance));
      cloner.RegisterClonedObject(this, clone);
      clone.readOnly = readOnly;
      return clone;
    }

    public AlbaEncoding(Permutation permutation, IVRPProblemInstance instance)
      : base(permutation, instance) {
    }

    [StorableConstructor]
    private AlbaEncoding(bool serializing)
      : base(serializing) {
    }

    public static AlbaEncoding ConvertFrom(List<int> routeParam, IVRPProblemInstance instance) {
      List<int> route = new List<int>(routeParam);
      route.RemoveAt(routeParam.Count - 1);
      
      int cities = 0;
      for (int i = 0; i < route.Count; i++) {
        if (route[i] != 0) {
          cities++;
        }
      }

      int vehicle = cities;
      for (int i = 0; i < route.Count; i++) {
        if (route[i] == 0) {
          route[i] = vehicle;
          vehicle++;
        } else {
          route[i] = route[i] - 1;
        }
      }

      return new AlbaEncoding(
        new Permutation(PermutationTypes.RelativeUndirected, route.ToArray()),
        instance);
    }
  }
}