#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2017 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 HeuristicLab.Algorithms.CMAEvolutionStrategy;
using HeuristicLab.Algorithms.GeneticAlgorithm;
using HeuristicLab.Common;
using HeuristicLab.Core;
using HeuristicLab.Core.Networks;
using HeuristicLab.Optimization;
using HeuristicLab.Persistence.Default.CompositeSerializers.Storable;
using HeuristicLab.Problems.FacilityLocation;
using HeuristicLab.Problems.FacilityLocation.CplexSolver;
using HeuristicLab.Problems.VehicleRouting;
using HeuristicLab.Problems.VehicleRouting.Encodings.General;
using HeuristicLab.Selection;

namespace HeuristicLab.Networks.IntegratedOptimization.LocationRouting {
  [Item("LrpNetwork1", "Version 1 of a TTP optimization network.")]
  [Creatable("Optimization Networks")]
  [StorableClass]
  public sealed class LrpNetwork1 : Network, IOptimizer {
    #region Nodes
    public LrpOrchestratorNode1 Orchestrator {
      get { return (LrpOrchestratorNode1)Nodes["Orchestrator"]; }
    }

    public OrchestratedAlgorithmNode MetaSolver {
      get { return (OrchestratedAlgorithmNode)Nodes["MetaSolver"]; }
    }

    public OrchestratedAlgorithmNode LrpSolver {
      get { return (OrchestratedAlgorithmNode)Nodes["LrpSolver"]; }
    }

    public OrchestratedAlgorithmNode VrpSolver {
      get { return (OrchestratedAlgorithmNode)Nodes["VrpSolver"]; }
    }
    #endregion

    [StorableConstructor]
    private LrpNetwork1(bool deserializing) : base(deserializing) { }
    private LrpNetwork1(LrpNetwork1 original, Cloner cloner) : base(original, cloner) {
      RegisterEvents();
    }

    private void RegisterEvents() {
      MetaSolver.Algorithm.ExecutionStateChanged += OnExecutionStateChanged;
      MetaSolver.Algorithm.ExecutionTimeChanged += OnExecutionTimeChanged;
      MetaSolver.Algorithm.Prepared += OnPrepared;
      MetaSolver.Algorithm.Started += OnStarted;
      MetaSolver.Algorithm.Paused += OnPaused;
      MetaSolver.Algorithm.Stopped += OnStopped;
      MetaSolver.Algorithm.ExceptionOccurred += OnExceptionOccurred;
    }

    public LrpNetwork1() : base("LrpNetwork1") {
      var orchestratorNode = new LrpOrchestratorNode1("Orchestrator");
      Nodes.Add(orchestratorNode);

      var metaSolverNode = new OrchestratedAlgorithmNode("MetaSolver");
      var cmaes = new CMAEvolutionStrategy();
      var vp = new VariegationProblem();
      vp.SetMaximization(false);
      cmaes.Problem = vp;
      cmaes.MaximumGenerations = 80;
      metaSolverNode.Algorithm = cmaes;
      orchestratorNode.MetaSolverOrchestrationPort.ConnectedPort = metaSolverNode.OrchestrationPort;
      Nodes.Add(metaSolverNode);

      var flpSolverNode = new OrchestratedAlgorithmNode("FlpSolver");
      var cplexSolver = new FLPCplexSolver();
      cplexSolver.Problem = new FacilityLocationProblem();
      cplexSolver.MaximumRuntimeParameter.Value.Value = TimeSpan.FromSeconds(3.0);
      flpSolverNode.Algorithm = cplexSolver;
      orchestratorNode.FlpSolverOrchestrationPort.ConnectedPort = flpSolverNode.OrchestrationPort;
      Nodes.Add(flpSolverNode);

      var vrpSolverNode = new OrchestratedAlgorithmNode("VrpSolver");
      var ga = new GeneticAlgorithm();
      ga.Problem = new VehicleRoutingProblem();
      ga.PopulationSize.Value = 100;
      var crossover = ga.CrossoverParameter.ValidValues.OfType<MultiVRPSolutionCrossover>().Single(x => x.Name == "MultiVRPSolutionCrossover");
      ga.CrossoverParameter.Value = crossover;
      ga.MaximumGenerations.Value = 100;
      var mutator = ga.MutatorParameter.ValidValues.OfType<MultiVRPSolutionManipulator>().Single(x => x.Name == "MultiVRPSolutionManipulator");
      ga.MutatorParameter.Value = mutator;
      var selector = ga.SelectorParameter.ValidValues.OfType<TournamentSelector>().Single();
      ga.SelectorParameter.Value = selector;
      vrpSolverNode.Algorithm = ga;
      orchestratorNode.VrpSolverOrchestrationPort.ConnectedPort = vrpSolverNode.OrchestrationPort;
      Nodes.Add(vrpSolverNode);

      RegisterEvents();
    }

    public override IDeepCloneable Clone(Cloner cloner) {
      return new LrpNetwork1(this, cloner);
    }

    [StorableHook(HookType.AfterDeserialization)]
    private void AfterDeserialization() {
      RegisterEvents();
    }

    #region IOptimizer Members
    public RunCollection Runs { get { return MetaSolver.Algorithm.Runs; } }
    public IEnumerable<IOptimizer> NestedOptimizers { get { yield break; } }
    public ExecutionState ExecutionState { get { return MetaSolver.Algorithm.ExecutionState; } }
    public TimeSpan ExecutionTime { get { return MetaSolver.Algorithm.ExecutionTime; } }

    public void Prepare(bool clearRuns) { Prepare(); }
    public void Prepare() { Orchestrator.Prepare(); }
    public void Start() {
      if (MetaSolver.Algorithm.ExecutionState == ExecutionState.Prepared)
        Orchestrator.Prepare();
      Orchestrator.StartAsync();
    }
    public void Pause() { Orchestrator.Pause(); }
    public void Stop() { Orchestrator.Stop(); }
    #endregion

    private void OnExecutionStateChanged(object sender, EventArgs e) { OnExecutionStateChanged(); }
    private void OnExecutionTimeChanged(object sender, EventArgs e) { OnExecutionTimeChanged(); }
    private void OnPrepared(object sender, EventArgs e) { OnPrepared(); }
    private void OnStarted(object sender, EventArgs e) { OnStarted(); }
    private void OnPaused(object sender, EventArgs e) { OnPaused(); }
    private void OnStopped(object sender, EventArgs e) { OnStopped(); }
    private void OnExceptionOccurred(object sender, EventArgs<Exception> e) { OnExceptionOccurred(e.Value); }

    public event EventHandler ExecutionStateChanged;
    private void OnExecutionStateChanged() {
      var handler = ExecutionStateChanged;
      if (handler != null) handler(this, EventArgs.Empty);
    }

    public event EventHandler ExecutionTimeChanged;
    private void OnExecutionTimeChanged() {
      var handler = ExecutionTimeChanged;
      if (handler != null) handler(this, EventArgs.Empty);
    }

    public event EventHandler Prepared;
    private void OnPrepared() {
      var handler = Prepared;
      if (handler != null) handler(this, EventArgs.Empty);
    }

    public event EventHandler Started;
    private void OnStarted() {
      var handler = Started;
      if (handler != null) handler(this, EventArgs.Empty);
    }

    public event EventHandler Paused;
    private void OnPaused() {
      var handler = Paused;
      if (handler != null) handler(this, EventArgs.Empty);
    }

    public event EventHandler Stopped;
    private void OnStopped() {
      var handler = Stopped;
      if (handler != null) handler(this, EventArgs.Empty);
    }

    public event EventHandler<EventArgs<Exception>> ExceptionOccurred;
    private void OnExceptionOccurred(Exception exception) {
      var handler = ExceptionOccurred;
      if (handler != null) handler(this, new EventArgs<Exception>(exception));
    }
  }
}