#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.Core;
using HeuristicLab.Data;
using HeuristicLab.Operators;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;

namespace HeuristicLab.Problems.VehicleRouting {
  [Item("BestAverageWorstVRPToursCalculator", "An operator which calculates the current best, average and worst properties of VRP tours in the scope tree.")]
  [StorableClass]
  public sealed class BestAverageWorstVRPToursCalculator : SingleSuccessorOperator {
    public ScopeTreeLookupParameter<DoubleValue> OverloadParameter {
      get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["Overload"]; }
    }
    public ValueLookupParameter<DoubleValue> BestOverloadParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["BestOverload"]; }
    }
    public ValueLookupParameter<DoubleValue> AverageOverloadParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["AverageOverload"]; }
    }
    public ValueLookupParameter<DoubleValue> WorstOverloadParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["WorstOverload"]; }
    }

    public ScopeTreeLookupParameter<DoubleValue> TardinessParameter {
      get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["Tardiness"]; }
    }
    public ValueLookupParameter<DoubleValue> BestTardinessParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["BestTardiness"]; }
    }
    public ValueLookupParameter<DoubleValue> AverageTardinessParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["AverageTardiness"]; }
    }
    public ValueLookupParameter<DoubleValue> WorstTardinessParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["WorstTardiness"]; }
    }

    public ScopeTreeLookupParameter<DoubleValue> DistanceParameter {
      get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["Distance"]; }
    }
    public ValueLookupParameter<DoubleValue> BestDistanceParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["BestDistance"]; }
    }
    public ValueLookupParameter<DoubleValue> AverageDistanceParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["AverageDistance"]; }
    }
    public ValueLookupParameter<DoubleValue> WorstDistanceParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["WorstDistance"]; }
    }

    public ScopeTreeLookupParameter<DoubleValue> TravelTimeParameter {
      get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["TravelTime"]; }
    }
    public ValueLookupParameter<DoubleValue> BestTravelTimeParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["BestTravelTime"]; }
    }
    public ValueLookupParameter<DoubleValue> AverageTravelTimeParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["AverageTravelTime"]; }
    }
    public ValueLookupParameter<DoubleValue> WorstTravelTimeParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["WorstTravelTime"]; }
    }

    public ScopeTreeLookupParameter<DoubleValue> VehiclesUtilizedParameter {
      get { return (ScopeTreeLookupParameter<DoubleValue>)Parameters["VehiclesUtilized"]; }
    }
    public ValueLookupParameter<DoubleValue> BestVehiclesUtilizedParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["BestVehiclesUtilized"]; }
    }
    public ValueLookupParameter<DoubleValue> AverageVehiclesUtilizedParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["AverageVehiclesUtilized"]; }
    }
    public ValueLookupParameter<DoubleValue> WorstVehiclesUtilizedParameter {
      get { return (ValueLookupParameter<DoubleValue>)Parameters["WorstVehiclesUtilized"]; }
    }

    public BestAverageWorstVRPToursCalculator()
      : base() {
      Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("Distance", "The distances of the VRP solutions which should be analyzed."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("BestDistance", "The best distance value."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("AverageDistance", "The average distance value of all solutions."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("WorstDistance", "The worst distance value of all solutions."));

      Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("Overload", "The overloads of the VRP solutions which should be analyzed."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("BestOverload", "The best overload value."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("AverageOverload", "The average overload value of all solutions."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("WorstOverload", "The worst overload value of all solutions."));

      Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("Tardiness", "The tardiness of the VRP solutions which should be analyzed."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("BestTardiness", "The best tardiness value."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("AverageTardiness", "The average tardiness value of all solutions."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("WorstTardiness", "The worst tardiness value of all solutions."));

      Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("TravelTime", "The travel times of the VRP solutions which should be analyzed."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("BestTravelTime", "The best travel time value."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("AverageTravelTime", "The average travel time value of all solutions."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("WorstTravelTime", "The worst travel time value of all solutions."));

      Parameters.Add(new ScopeTreeLookupParameter<DoubleValue>("VehiclesUtilized", "The utilized vehicles of the VRP solutions which should be analyzed."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("BestVehiclesUtilized", "The best utilized vehicles value."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("AverageVehiclesUtilized", "The average utilized vehicles value of all solutions."));
      Parameters.Add(new ValueLookupParameter<DoubleValue>("WorstVehiclesUtilized", "The worst utilized vehicles value of all solutions."));
    }

    private void UpdateOverloads() {
      ItemArray<DoubleValue> overloads = OverloadParameter.ActualValue;
      if (overloads.Length > 0) {
        double min = double.MaxValue, max = double.MinValue, sum = 0.0;
        for (int i = 0; i < overloads.Length; i++) {
          if (overloads[i].Value < min) min = overloads[i].Value;
          if (overloads[i].Value > max) max = overloads[i].Value;
          sum += overloads[i].Value;
        }

        DoubleValue best = BestOverloadParameter.ActualValue;
        if (best == null) BestOverloadParameter.ActualValue = new DoubleValue(min);
        else best.Value = min;
        DoubleValue average = AverageOverloadParameter.ActualValue;
        if (average == null) AverageOverloadParameter.ActualValue = new DoubleValue(sum / overloads.Length);
        else average.Value = sum / overloads.Length;
        DoubleValue worst = WorstOverloadParameter.ActualValue;
        if (worst == null) WorstOverloadParameter.ActualValue = new DoubleValue(max);
        else worst.Value = max;
      }
    }

    private void UpdateTardiness() {
      ItemArray<DoubleValue> tardiness = TardinessParameter.ActualValue;
      if (tardiness.Length > 0) {
        double min = double.MaxValue, max = double.MinValue, sum = 0.0;
        for (int i = 0; i < tardiness.Length; i++) {
          if (tardiness[i].Value < min) min = tardiness[i].Value;
          if (tardiness[i].Value > max) max = tardiness[i].Value;
          sum += tardiness[i].Value;
        }

        DoubleValue best = BestTardinessParameter.ActualValue;
        if (best == null) BestTardinessParameter.ActualValue = new DoubleValue(min);
        else best.Value = min;
        DoubleValue average = AverageTardinessParameter.ActualValue;
        if (average == null) AverageTardinessParameter.ActualValue = new DoubleValue(sum / tardiness.Length);
        else average.Value = sum / tardiness.Length;
        DoubleValue worst = WorstTardinessParameter.ActualValue;
        if (worst == null) WorstTardinessParameter.ActualValue = new DoubleValue(max);
        else worst.Value = max;
      }
    }

    private void UpdateDistances() {
      ItemArray<DoubleValue> distances = DistanceParameter.ActualValue;
      if (distances.Length > 0) {
        double min = double.MaxValue, max = double.MinValue, sum = 0.0;
        for (int i = 0; i < distances.Length; i++) {
          if (distances[i].Value < min) min = distances[i].Value;
          if (distances[i].Value > max) max = distances[i].Value;
          sum += distances[i].Value;
        }

        DoubleValue best = BestDistanceParameter.ActualValue;
        if (best == null) BestDistanceParameter.ActualValue = new DoubleValue(min);
        else best.Value = min;
        DoubleValue average = AverageDistanceParameter.ActualValue;
        if (average == null) AverageDistanceParameter.ActualValue = new DoubleValue(sum / distances.Length);
        else average.Value = sum / distances.Length;
        DoubleValue worst = WorstDistanceParameter.ActualValue;
        if (worst == null) WorstDistanceParameter.ActualValue = new DoubleValue(max);
        else worst.Value = max;
      }
    }

    private void UpdateTravelTimes() {
      ItemArray<DoubleValue> travelTimes = TravelTimeParameter.ActualValue;
      if (travelTimes.Length > 0) {
        double min = double.MaxValue, max = double.MinValue, sum = 0.0;
        for (int i = 0; i < travelTimes.Length; i++) {
          if (travelTimes[i].Value < min) min = travelTimes[i].Value;
          if (travelTimes[i].Value > max) max = travelTimes[i].Value;
          sum += travelTimes[i].Value;
        }

        DoubleValue best = BestTravelTimeParameter.ActualValue;
        if (best == null) BestTravelTimeParameter.ActualValue = new DoubleValue(min);
        else best.Value = min;
        DoubleValue average = AverageTravelTimeParameter.ActualValue;
        if (average == null) AverageTravelTimeParameter.ActualValue = new DoubleValue(sum / travelTimes.Length);
        else average.Value = sum / travelTimes.Length;
        DoubleValue worst = WorstTravelTimeParameter.ActualValue;
        if (worst == null) WorstTravelTimeParameter.ActualValue = new DoubleValue(max);
        else worst.Value = max;
      }
    }

    private void UpdateVehiclesUtilized() {
      ItemArray<DoubleValue> vehiclesUtilized = VehiclesUtilizedParameter.ActualValue;
      if (vehiclesUtilized.Length > 0) {
        double min = double.MaxValue, max = double.MinValue, sum = 0.0;
        for (int i = 0; i < vehiclesUtilized.Length; i++) {
          if (vehiclesUtilized[i].Value < min) min = vehiclesUtilized[i].Value;
          if (vehiclesUtilized[i].Value > max) max = vehiclesUtilized[i].Value;
          sum += vehiclesUtilized[i].Value;
        }

        DoubleValue best = BestVehiclesUtilizedParameter.ActualValue;
        if (best == null) BestVehiclesUtilizedParameter.ActualValue = new DoubleValue(min);
        else best.Value = min;
        DoubleValue average = AverageVehiclesUtilizedParameter.ActualValue;
        if (average == null) AverageVehiclesUtilizedParameter.ActualValue = new DoubleValue(sum / vehiclesUtilized.Length);
        else average.Value = sum / vehiclesUtilized.Length;
        DoubleValue worst = WorstVehiclesUtilizedParameter.ActualValue;
        if (worst == null) WorstVehiclesUtilizedParameter.ActualValue = new DoubleValue(max);
        else worst.Value = max;
      }
    }

    public override IOperation Apply() {
      UpdateOverloads();
      UpdateTardiness();
      UpdateDistances();
      UpdateTravelTimes();
      UpdateVehiclesUtilized();

      return base.Apply();
    }
  }
}