#region License Information
/* HeuristicLab
 * Copyright (C) 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.Collections.Generic;
using System.Linq;
using HEAL.Attic;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Optimization;
using HeuristicLab.PluginInfrastructure;

namespace HeuristicLab.Encodings.LinearLinkageEncoding {
  [Item("Linear Linkage Encoding", "Describes a linear linkage (LLE) encoding.")]
  [StorableType("7AE11F39-E6BD-4FC7-8112-0A5EDCBFBDB6")]
  public sealed class LinearLinkageEncoding : VectorEncoding {

    [StorableConstructor]
    private LinearLinkageEncoding(StorableConstructorFlag _) : base(_) { }
    [StorableHook(HookType.AfterDeserialization)]
    private void AfterDeserialization() {
      DiscoverOperators();
    }

    public override IDeepCloneable Clone(Cloner cloner) { return new LinearLinkageEncoding(this, cloner); }
    private LinearLinkageEncoding(LinearLinkageEncoding original, Cloner cloner) : base(original, cloner) { }

    public LinearLinkageEncoding() : this("LLE", 10) { }
    public LinearLinkageEncoding(string name) : this(name, 10) { }
    public LinearLinkageEncoding(int length) : this("LLE", length) { }
    public LinearLinkageEncoding(string name, int length)
      : base(name, length) {
      DiscoverOperators();
    }

    #region Operator Discovery
    private static readonly IEnumerable<Type> encodingSpecificOperatorTypes;
    static LinearLinkageEncoding() {
      encodingSpecificOperatorTypes = new List<Type>() {
          typeof (ILinearLinkageOperator),
          typeof (ILinearLinkageCreator),
          typeof (ILinearLinkageCrossover),
          typeof (ILinearLinkageManipulator),
          typeof (ILinearLinkageShakingOperator),
          typeof (ILinearLinkageMoveOperator)
      };
    }
    private void DiscoverOperators() {
      var assembly = typeof(ILinearLinkageOperator).Assembly;
      var discoveredTypes = ApplicationManager.Manager.GetTypes(encodingSpecificOperatorTypes, assembly, true, false, false);
      var operators = discoveredTypes.Select(t => (IOperator)Activator.CreateInstance(t));
      var newOperators = operators.Except(Operators, new TypeEqualityComparer<IOperator>()).ToList();

      ConfigureOperators(newOperators);
      foreach (var @operator in newOperators)
        AddOperator(@operator);
    }
    #endregion

    public override void ConfigureOperators(IEnumerable<IItem> operators) {
      base.ConfigureOperators(operators);
      ConfigureCreators(operators.OfType<ILinearLinkageCreator>());
      ConfigureCrossovers(operators.OfType<ILinearLinkageCrossover>());
      ConfigureManipulators(operators.OfType<ILinearLinkageManipulator>());
      ConfigureShakingOperators(operators.OfType<ILinearLinkageShakingOperator>());
      ConfigureMoveOperators(operators.OfType<ILinearLinkageMoveOperator>());
      ConfigureSwap2MoveOperators(operators.OfType<ILinearLinkageSwap2MoveOperator>());
    }

    #region specific operator wiring
    private void ConfigureCreators(IEnumerable<ILinearLinkageCreator> creators) {
      foreach (var creator in creators) {
        creator.LengthParameter.ActualName = LengthParameter.Name;
        creator.LLEParameter.ActualName = Name;
      }
    }
    private void ConfigureCrossovers(IEnumerable<ILinearLinkageCrossover> crossovers) {
      foreach (var crossover in crossovers) {
        crossover.ChildParameter.ActualName = Name;
        crossover.ParentsParameter.ActualName = Name;
      }
    }
    private void ConfigureManipulators(IEnumerable<ILinearLinkageManipulator> manipulators) {
      foreach (var manipulator in manipulators) {
        manipulator.LLEParameter.ActualName = Name;
      }
    }
    private void ConfigureShakingOperators(IEnumerable<ILinearLinkageShakingOperator> shakingOperators) {
      foreach (var shakingOperator in shakingOperators) {
        shakingOperator.LLEParameter.ActualName = Name;
      }
    }
    private void ConfigureMoveOperators(IEnumerable<ILinearLinkageMoveOperator> moveOperators) {
      foreach (var moveOperator in moveOperators) {
        moveOperator.LLEParameter.ActualName = Name;
      }
    }
    private void ConfigureSwap2MoveOperators(IEnumerable<ILinearLinkageSwap2MoveOperator> swap2MoveOperators) {
      foreach (var swap2MoveOperator in swap2MoveOperators) {
        swap2MoveOperator.Swap2MoveParameter.ActualName = Name + ".Swap2Move";
      }
    }
    #endregion
  }
}