#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2018 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.Optimization;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.Problems.TestFunctions.MultiObjective {
  [StorableClass]
  [Item("GenerationalDistanceAnalyzer", "This analyzer is functionally equivalent to the GenerationalDistanceAnalyzer in HeuristicLab.Analysis, but is kept as not to break backwards compatibility")]
  public class GenerationalDistanceAnalyzer : MOTFAnalyzer {

    private IFixedValueParameter<DoubleValue> DampeningParameter {
      get => (IFixedValueParameter<DoubleValue>)Parameters["Dampening"];
      set => Parameters["Dampening"].ActualValue = value;
    }

    public double Dampening {
      get => DampeningParameter.Value.Value;
      set => DampeningParameter.Value.Value = value;
    }

    public IResultParameter<DoubleValue> GenerationalDistanceResultParameter => (IResultParameter<DoubleValue>)Parameters["Generational Distance"];

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

    public GenerationalDistanceAnalyzer() {
      Parameters.Add(new FixedValueParameter<DoubleValue>("Dampening", "", new DoubleValue(1)));
      Parameters.Add(new ResultParameter<DoubleValue>("Generational Distance", "The genrational distance between the current front and the optimal front"));
      GenerationalDistanceResultParameter.DefaultValue = new DoubleValue(double.NaN);

    }

    public override IOperation Apply() {
      var qualities = QualitiesParameter.ActualValue;
      var optimalfront = TestFunctionParameter.ActualValue.OptimalParetoFront(qualities[0].Length);
      if (optimalfront == null) return base.Apply();
      GenerationalDistanceResultParameter.ActualValue.Value = GenerationalDistanceCalculator.CalculateGenerationalDistance(qualities, optimalfront, Dampening);
      return base.Apply();
    }
  }
}