#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2016 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 HeuristicLab.Common;
using HeuristicLab.MainForm;
using HeuristicLab.MainForm.WindowsForms;
using HeuristicLab.Optimization;
using HeuristicLab.OptimizationExpertSystem.Common;

namespace HeuristicLab.OptimizationExpertSystem {
  [View("Expert-System View")]
  public partial class KnowledgeCenterViewBase : AsynchronousContentView {
    public OptimizationKnowledgeCenter MainForm {
      get { return (OptimizationKnowledgeCenter)HeuristicLab.MainForm.MainFormManager.MainForm; }
    }

    public new KnowledgeCenter Content {
      get { return (KnowledgeCenter)base.Content; }
      set { base.Content = value; }
    }

    protected KnowledgeCenterViewBase() {
      InitializeComponent();
    }

    #region Event Registration
    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      Content.DownloadStarted += ContentOnDownloadStarted;
      Content.AlgorithmInstanceStarted += ContentOnAlgorithmInstanceStarted;
      Content.RecommendationModelChanged += ContentOnRecommendationModelChanged;
      RegisterContentProblemEvents();
      RegisterContentProblemInstancesEvents();
      RegisterContentSolutionSeedingPoolEvents();
      RegisterContentSuggestedInstancesEvents();
    }

    private void RegisterContentProblemEvents() {
      Content.Problem.ProblemChanged += ContentOnProblemChanged;
      Content.Problem.Solutions.CollectionReset += ContentOnProblemSolutionsChanged;
      Content.Problem.Solutions.ItemsAdded += ContentOnProblemSolutionsChanged;
      Content.Problem.Solutions.ItemsReplaced += ContentOnProblemSolutionsChanged;
      Content.Problem.Solutions.ItemsRemoved += ContentOnProblemSolutionsChanged;
    }

    private void RegisterContentProblemInstancesEvents() {
      Content.ProblemInstances.UpdateOfRunsInProgressChanged += ContentOnProblemInstancesChanged;
      Content.ProblemInstances.ItemsAdded += ContentOnProblemInstancesChanged;
      Content.ProblemInstances.ItemsRemoved += ContentOnProblemInstancesChanged;
      Content.ProblemInstances.CollectionReset += ContentOnProblemInstancesChanged;
      Content.ProblemInstances.ItemChanged += ContentOnProblemInstancesChanged;
    }

    private void RegisterContentSolutionSeedingPoolEvents() {
      Content.SolutionSeedingPool.CheckedItemsChanged += ContentOnSolutionSeedingPoolChanged;
      Content.SolutionSeedingPool.CollectionReset += ContentOnSolutionSeedingPoolChanged;
      Content.SolutionSeedingPool.ItemsAdded += ContentOnSolutionSeedingPoolChanged;
      Content.SolutionSeedingPool.ItemsRemoved += ContentOnSolutionSeedingPoolChanged;
      Content.SolutionSeedingPool.ItemsReplaced += ContentOnSolutionSeedingPoolChanged;
    }

    private void RegisterContentSuggestedInstancesEvents() {
      Content.AlgorithmInstances.CollectionReset += ContentOnAlgorithmInstancesChanged;
      Content.AlgorithmInstances.ItemsAdded += ContentOnAlgorithmInstancesChanged;
      Content.AlgorithmInstances.ItemsMoved += ContentOnAlgorithmInstancesChanged;
      Content.AlgorithmInstances.ItemsRemoved += ContentOnAlgorithmInstancesChanged;
      Content.AlgorithmInstances.ItemsReplaced += ContentOnAlgorithmInstancesChanged;
    }

    protected override void DeregisterContentEvents() {
      base.DeregisterContentEvents();
      Content.DownloadStarted -= ContentOnDownloadStarted;
      Content.AlgorithmInstanceStarted -= ContentOnAlgorithmInstanceStarted;
      Content.RecommendationModelChanged -= ContentOnRecommendationModelChanged;
      DeregisterContentProblemEvents();
      DeregisterContentProblemInstancesEvents();
      DeregisterContentSolutionSeedingPoolEvents();
      DeregisterContentSuggestedInstancesEvents();
    }

    private void DeregisterContentProblemEvents() {
      Content.Problem.ProblemChanged -= ContentOnProblemChanged;
      Content.Problem.Solutions.CollectionReset -= ContentOnProblemSolutionsChanged;
      Content.Problem.Solutions.ItemsAdded -= ContentOnProblemSolutionsChanged;
      Content.Problem.Solutions.ItemsReplaced -= ContentOnProblemSolutionsChanged;
      Content.Problem.Solutions.ItemsRemoved -= ContentOnProblemSolutionsChanged;
    }

    private void DeregisterContentProblemInstancesEvents() {
      Content.ProblemInstances.UpdateOfRunsInProgressChanged -= ContentOnProblemInstancesChanged;
      Content.ProblemInstances.ItemsAdded -= ContentOnProblemInstancesChanged;
      Content.ProblemInstances.ItemsRemoved -= ContentOnProblemInstancesChanged;
      Content.ProblemInstances.CollectionReset -= ContentOnProblemInstancesChanged;
      Content.ProblemInstances.ItemChanged -= ContentOnProblemInstancesChanged;
    }

    private void DeregisterContentSolutionSeedingPoolEvents() {
      Content.SolutionSeedingPool.CheckedItemsChanged -= ContentOnSolutionSeedingPoolChanged;
      Content.SolutionSeedingPool.CollectionReset -= ContentOnSolutionSeedingPoolChanged;
      Content.SolutionSeedingPool.ItemsAdded -= ContentOnSolutionSeedingPoolChanged;
      Content.SolutionSeedingPool.ItemsRemoved -= ContentOnSolutionSeedingPoolChanged;
      Content.SolutionSeedingPool.ItemsReplaced -= ContentOnSolutionSeedingPoolChanged;
    }

    private void DeregisterContentSuggestedInstancesEvents() {
      Content.AlgorithmInstances.CollectionReset -= ContentOnAlgorithmInstancesChanged;
      Content.AlgorithmInstances.ItemsAdded -= ContentOnAlgorithmInstancesChanged;
      Content.AlgorithmInstances.ItemsMoved -= ContentOnAlgorithmInstancesChanged;
      Content.AlgorithmInstances.ItemsRemoved -= ContentOnAlgorithmInstancesChanged;
      Content.AlgorithmInstances.ItemsReplaced -= ContentOnAlgorithmInstancesChanged;
    }
    #endregion

    protected virtual void OnDownloadStarted(IProgress progress) { }
    protected virtual void OnDownloadEnded() { }
    protected virtual void OnAlgorithmInstanceStarted(IAlgorithm algorithm) { }
    protected virtual void OnRecommendationModelChanged() { }
    protected virtual void OnPropertyChanged(string propertyName) { }
    protected virtual void OnProblemChanged() { }
    protected virtual void OnProblemSolutionsChanged() { }
    protected virtual void OnProblemInstancesChanged() { }
    protected virtual void OnSolutionSeedingPoolChanged() { }
    protected virtual void OnAlgorithmInstancesChanged() { }
    protected virtual void OnKnowledgeBaseChanged() { }

    #region Content Event Handlers
    private void ContentOnDownloadStarted(object sender, EventArgs<IProgress> e) {
      if (InvokeRequired) { Invoke((Action<object, EventArgs<IProgress>>)ContentOnDownloadStarted, sender, e); return; }
      Progress.Show(this, e.Value);
      e.Value.ProgressStateChanged += ProgressOnStateChanged;
      OnDownloadStarted(e.Value);
    }

    private void ContentOnAlgorithmInstanceStarted(object sender, EventArgs<IAlgorithm> e) {
      if (InvokeRequired) { Invoke((Action<object, EventArgs<IAlgorithm>>)ContentOnAlgorithmInstanceStarted, sender, e); return; }
      OnAlgorithmInstanceStarted(e.Value);
    }

    private void ContentOnRecommendationModelChanged(object sender, EventArgs e) {
      if (InvokeRequired) { Invoke((Action<object, EventArgs<IAlgorithm>>)ContentOnRecommendationModelChanged, sender, e); return; }
      OnRecommendationModelChanged();
    }

    private void ProgressOnStateChanged(object sender, EventArgs e) {
      if (InvokeRequired) { Invoke((Action<object, EventArgs>)ProgressOnStateChanged, sender, e); return; }
      var progress = (IProgress)sender;
      if (progress == null || progress.ProgressState == ProgressState.Started) return;
      OnDownloadEnded();
    }

    private void ContentOnProblemChanged(object sender, EventArgs e) {
      if (InvokeRequired) Invoke((Action)OnProblemChanged);
      else OnProblemChanged();
    }

    private void ContentOnProblemSolutionsChanged(object sender, EventArgs e) {
      if (InvokeRequired) Invoke((Action)OnProblemSolutionsChanged);
      else OnProblemSolutionsChanged();
    }

    private void ContentOnProblemInstancesChanged(object sender, EventArgs e) {
      if (InvokeRequired) Invoke((Action)OnProblemInstancesChanged);
      else OnProblemInstancesChanged();
    }

    private void ContentOnSolutionSeedingPoolChanged(object sender, EventArgs e) {
      if (InvokeRequired) Invoke((Action)OnSolutionSeedingPoolChanged);
      else OnSolutionSeedingPoolChanged();
    }

    private void ContentOnAlgorithmInstancesChanged(object sender, EventArgs e) {
      if (InvokeRequired) Invoke((Action)OnAlgorithmInstancesChanged);
      else OnAlgorithmInstancesChanged();
    }
    #endregion
  }
}