#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2015 Joseph Helm and 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.Core.Views;
using HeuristicLab.MainForm;
using HeuristicLab.Encodings.PackingEncoding.PackingPlan;
using HeuristicLab.Problems.BinPacking.PackingItem;
using HeuristicLab.Problems.BinPacking.PackingBin;
using HeuristicLab.Problems.BinPacking.Dimensions;

namespace HeuristicLab.Problems.BinPacking.Views {
  [View("3-dimensional packing plan View")]
  [Content(typeof(PackingPlan<ThreeDimensionalPacking, CuboidPackingBin, CuboidPackingItem>), true)]
  public partial class PackingPlan3DView : NamedItemView {

    public PackingPlan3DView() {
      InitializeComponent();
      this.nameTextBox.Text = "Packing Plan";
    }


    protected override void DeregisterContentEvents() {
      Content.QualityChanged -= new EventHandler(Content_QualityChanged);
      base.DeregisterContentEvents();
    }
    protected override void RegisterContentEvents() {
      base.RegisterContentEvents();
      Content.QualityChanged += new EventHandler(Content_QualityChanged);
    }

    public new PackingPlan<ThreeDimensionalPacking, CuboidPackingBin, CuboidPackingItem> Content {
      get { return (PackingPlan<ThreeDimensionalPacking, CuboidPackingBin, CuboidPackingItem>)base.Content; }
      set { base.Content = value; }
    }


    protected override void OnContentChanged() {
      base.OnContentChanged();
      binSelection.Items.Clear();
      if (Content == null) { 
        packingPlan3D.InitializeContainer(0, 0, 0);
      } else {
        Content.Name = "Packing Plan";
        int i = 0;
        foreach (var bp in Content.BinPackings)
          binSelection.Items.Add(i++ + " (" + Math.Round(bp.PackingDensity * 100, 2) + "%)");

        binSelection.SelectedIndex = 0;
        UpdateModel();
        packingPlan3D.StartRendering();
      }
    }

    private void UpdateModel() {
      int currentBin = (binSelection != null) ? (int)(binSelection.SelectedIndex) : 0;
      var bin = Content.BinPackings[currentBin].BinMeasures;
      packingPlan3D.InitializeContainer(bin.Width, bin.Height, bin.Depth);
      foreach (var entry in Content.BinPackings[currentBin].ItemMeasures) {
        var position = Content.BinPackings[currentBin].ItemPositions[entry.Key];
        packingPlan3D.AddItemToContainer(
        position.Rotated ? entry.Value.Depth : entry.Value.Width,
        entry.Value.Height,
        position.Rotated ? entry.Value.Width : entry.Value.Depth,
        position.X, position.Y, position.Z, entry.Key, entry.Value.Material);
      }
    }

    private void binSelection_SelectedIndexChanged(object sender, EventArgs e) {
      UpdateModel();

      itemSelection.SelectedIndex = -1;
      itemSelection.Items.Clear();
      int currentBin = (binSelection != null) ? (int)(binSelection.SelectedIndex) : 0;
      //for (int i = 0; i < Content.PackingItemPositions.Count; i++) {
      //  if (Content.PackingItemPositions[i].AssignedBin == currentBin)
      //    itemSelection.Items.Add(i);
      //}
      foreach (var entry in Content.BinPackings[currentBin].ItemMeasures) {
        itemSelection.Items.Add(entry.Key);
      }

      packingPlan3D.Invalidate();
      packingPlan3D.Update();
    }

    private void itemSelection_SelectedIndexChanged(object sender, EventArgs e) {
      UpdateModel();

      int selectedItem = -1;
      if ((itemSelection != null && itemSelection.SelectedItem != null) && Int32.TryParse(itemSelection.SelectedItem.ToString(), out selectedItem)) {
        packingPlan3D.SelectItem(selectedItem);
      } else      
        packingPlan3D.UnselectItem();

      packingPlan3D.Invalidate();
      packingPlan3D.Update();
    }

    private void Content_QualityChanged(object sender, EventArgs e) {
      if (InvokeRequired)
        Invoke(new EventHandler(Content_QualityChanged), sender, e);
      else {
        binSelection.Items.Clear();
        if (Content == null) {
          packingPlan3D.InitializeContainer(0, 0, 0);
        } else {
          Content.Name = "Packing Plan";
          int i = 0;
          foreach (var bp in Content.BinPackings)
            binSelection.Items.Add(i++ + " (" + Math.Round(bp.PackingDensity * 100, 2) + "%)");
          binSelection.SelectedIndex = 0;
          UpdateModel();
          packingPlan3D.StartRendering();
        }
      }
    }  
  }
}