#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2014 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.Linq;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Operators;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.Algorithms.ALPS {
  [Item("LastSubScopeCloner", "An operator which clones the last sub-scope of the current scope.")]
  [StorableClass]
  public sealed class LastSubScopeCloner : SingleSuccessorOperator {
    [StorableConstructor]
    private LastSubScopeCloner(bool deserializing) : base(deserializing) { }

    private LastSubScopeCloner(LastSubScopeCloner original, Cloner cloner)
      : base(original, cloner) {
    }
    public LastSubScopeCloner()
      : base() {
      Parameters.Add(new ScopeParameter("CurrentScope", "The current scope whose sub-scopes should be cloned."));
      Parameters.Add(new ValueParameter<IntValue>("NumberOfCopies", "The number of copies that should be created.", new IntValue(1)));
    }

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

    public override IOperation Apply() {
      var scopes = ExecutionContext.Scope.SubScopes;
      if (scopes.Count < 1)
        throw new ArgumentException("At least one sub-scope must exist.");

      var lastSubScope = scopes.Last();
      var clone = (IScope)lastSubScope.Clone(new Cloner());

      int number;
      if (int.TryParse(clone.Name, out number))
        clone.Name = (number + 1).ToString();

      scopes.Add(clone);

      return base.Apply();
    }
  }
}