#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 System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Data;
using HeuristicLab.Encodings.PermutationEncoding;
using HeuristicLab.Optimization;
using HeuristicLab.Parameters;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.PluginInfrastructure;

namespace HeuristicLab.Problems.VehicleRouting {
  [Item("Vehicle Routing Problem", "Represents a Vehicle Routing Problem.")]
  [Creatable("Problems")]
  [StorableClass]
  public sealed class VehicleRoutingProblem : ParameterizedNamedItem, ISingleObjectiveProblem {
    public override Image ItemImage {
      get { return HeuristicLab.Common.Resources.VS2008ImageLibrary.Type; }
    }

    #region ISingleObjectiveProblem Members
    public IParameter BestKnownQualityParameter {
      get { throw new NotImplementedException(); }
    }

    public ISingleObjectiveEvaluator Evaluator {
      get { throw new NotImplementedException(); }
    }

    #endregion

    #region IProblem Members
    public IParameter SolutionCreatorParameter {
      get { throw new NotImplementedException(); }
    }

    public ISolutionCreator SolutionCreator {
      get { throw new NotImplementedException(); }
    }

    public IParameter EvaluatorParameter {
      get { throw new NotImplementedException(); }
    }

    IEvaluator IProblem.Evaluator {
      get { throw new NotImplementedException(); }
    }

    public IEnumerable<IOperator> Operators {
      get { throw new NotImplementedException(); }
    }
    #endregion

    #region Parameter Properties
    public ValueParameter<BoolValue> MaximizationParameter {
      get { return (ValueParameter<BoolValue>)Parameters["Maximization"]; }
    }
    IParameter ISingleObjectiveProblem.MaximizationParameter {
      get { return MaximizationParameter; }
    }
    #endregion

    #region Properties
   
    #endregion

    [Storable]
    private List<IOperator> operators;

    [StorableConstructor]
    private VehicleRoutingProblem(bool deserializing) : base(deserializing) { }
    public VehicleRoutingProblem()
      : base() {
      Parameters.Add(new ValueParameter<BoolValue>("Maximization", "Set to false as the Vehicle Routing Problem is a minimization problem.", new BoolValue(false)));
   
      InitializeRandomVRPInstance();

      ParameterizeSolutionCreator();
      ParameterizeEvaluator();

      InitializeOperators();
      AttachEventHandlers();
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      VehicleRoutingProblem clone = (VehicleRoutingProblem)base.Clone(cloner);
      clone.operators = operators.Select(x => (IOperator)cloner.Clone(x)).ToList();
      clone.AttachEventHandlers();
      return clone;
    }

    #region Events
    public event EventHandler SolutionCreatorChanged;
    private void OnSolutionCreatorChanged() {
      EventHandler handler = SolutionCreatorChanged;
      if (handler != null) handler(this, EventArgs.Empty);
    }
    public event EventHandler EvaluatorChanged;
    private void OnEvaluatorChanged() {
      EventHandler handler = EvaluatorChanged;
      if (handler != null) handler(this, EventArgs.Empty);
    }
    public event EventHandler OperatorsChanged;
    private void OnOperatorsChanged() {
      EventHandler handler = OperatorsChanged;
      if (handler != null) handler(this, EventArgs.Empty);
    }
    public event EventHandler Reset;
    private void OnReset() {
      EventHandler handler = Reset;
      if (handler != null) handler(this, EventArgs.Empty);
    }  
    #endregion

    #region Helpers
    [StorableHook(HookType.AfterDeserialization)]
    private void AfterDeserializationHook() {
      AttachEventHandlers();
    }

    private void AttachEventHandlers() {
     
    }
    private void InitializeOperators() {
      operators = new List<IOperator>();
      ParameterizeAnalyzer();
      //operators.AddRange(ApplicationManager.Manager.GetInstances<IVRPOperator>().Cast<IOperator>().OrderBy(op => op.Name));
      ParameterizeOperators();
      UpdateMoveEvaluators();
      InitializeMoveGenerators();
    }
    private void InitializeMoveGenerators() {
      
    }
    private void UpdateMoveEvaluators() {
      ParameterizeOperators();
      OnOperatorsChanged();
    }
    private void ParameterizeSolutionCreator() {
     
    }
    private void ParameterizeEvaluator() {
      
    }
    private void ParameterizeAnalyzer() {
     
    }
    private void ParameterizeOperators() {
      
    }
    private void ClearDistanceMatrix() {
      
    }
    #endregion

    public void ImportFromSolomon(string solomonFileName) {
      SolomonParser parser = new SolomonParser(solomonFileName);
      parser.Parse();

      this.Name = parser.ProblemName;

      OnReset();
    }

    public void ImportFromTSPLib(string tspFileName) {
      TSPLIBParser parser = new TSPLIBParser(tspFileName);
      parser.Parse();

      this.Name = parser.Name;
      int problemSize = parser.Demands.Length;

      if (parser.Depot != 1)
        throw new Exception("Invalid depot specification");

      if (parser.WeightType != TSPLIBParser.TSPLIBEdgeWeightType.EUC_2D)
        throw new Exception("Invalid weight type");

      OnReset();
    }

    public void ImportFromORLib(string orFileName) {
      ORLIBParser parser = new ORLIBParser(orFileName);
      parser.Parse();

      this.Name = parser.Name;
      int problemSize = parser.Demands.Length;

      OnReset();
    }

    private void InitializeRandomVRPInstance() {
      System.Random rand = new System.Random();

      int cities = 100;
    }
  }
}