using System;
using System.Windows.Forms;
using HeuristicLab.Core.Views;
using HeuristicLab.MainForm;
using HeuristicLab.Encodings.PackingEncoding.PackingPlan;
using HeuristicLab.Problems.BinPacking.Interfaces;
using HeuristicLab.Problems.BinPacking.PackingItem;
using HeuristicLab.Problems.BinPacking.PackingBin;
using HeuristicLab.Problems.BinPacking.Dimensions;
using HeuristicLab.Core;
using HeuristicLab.Data;

namespace HeuristicLab.Problems.BinPacking.Views {
  [View("2-dimensional packing plan View")]
  [Content(typeof(PackingPlan<TwoDimensionalPacking, RectangularPackingBin, RectangularPackingItem>), true)]
  public partial class PackingPlan2DView : NamedItemView {

    public PackingPlan2DView() {
      InitializeComponent();
    }       

    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<TwoDimensionalPacking, RectangularPackingBin, RectangularPackingItem> Content {
      get { return (PackingPlan<TwoDimensionalPacking, RectangularPackingBin, RectangularPackingItem>)base.Content; }
      set { base.Content = value; }
    }


    protected override void OnContentChanged() {
      base.OnContentChanged();
      binSelection.Items.Clear();
      if (Content == null) {
        Redraw();
      } else {
        for (int i = 0; i < Content.NrOfBins; i++)
          binSelection.Items.Add(i);
        Redraw(Content);
      }
    }


    private void Redraw() {
      packingPlan2D.InitializeContainer(0, 0);
    }

    private void Redraw(PackingPlan<TwoDimensionalPacking, RectangularPackingBin, RectangularPackingItem> plan) {     
      int currentBin = (binSelection != null && binSelection.SelectedItem != null) ? (int)(binSelection.SelectedItem) : 0;
      var bin = plan.BinPackings[currentBin].BinMeasures;
      packingPlan2D.InitializeContainer(bin.Width, bin.Height);
      foreach (var entry in plan.BinPackings[currentBin].ItemMeasures) {
        var position = plan.BinPackings[currentBin].ItemPositions[entry.Key];
          packingPlan2D.AddItemToContainer(
            position.Rotated ? entry.Value.Height : entry.Value.Width,
            position.Rotated ? entry.Value.Width : entry.Value.Height, 
            position.X, position.Y, entry.Key.ToString());
      }
    }

    private void binSelection_SelectedIndexChanged(object sender, EventArgs e) {
      Redraw(Content);
      packingPlan2D.Refresh();
      packingPlan2D.Refresh();
      packingPlan2D.Refresh();
      packingPlan2D.Refresh();
      packingPlan2D.Refresh();
    }



    private void Content_QualityChanged(object sender, EventArgs e) {
      if (InvokeRequired)
        Invoke(new EventHandler(Content_QualityChanged), sender, e);
      else {
        binSelection.Items.Clear();
        if (Content == null) {
          Redraw();
        } else {
          for (int i = 0; i < Content.NrOfBins; i++)
            binSelection.Items.Add(i);
          Redraw(Content);
        }
        packingPlan2D.Refresh();
        packingPlan2D.Refresh();
        packingPlan2D.Refresh();
        packingPlan2D.Refresh();
        packingPlan2D.Refresh();
      }
    }  
  }
}