#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.Collections.Generic;
using System.Linq;
using SharpDX;


namespace PackingPlanVisualizations {
  public class CenteredContainer2D {
    private Vector2 containerSize;
    private float xScaling;
    private float yScaling;
    private readonly List<PackingItem> packingItems = new List<PackingItem>();

    private struct PackingItem {
      internal readonly Vector2 position;
      internal readonly Vector2 size;
      internal readonly string label;
      public PackingItem(Vector2 size, Vector2 position, string label) {
        this.size = size;
        this.position = position;
        this.label = label;
      }
    }

    public CenteredContainer2D(Vector2 controlSize, Vector2 containerSize) {
      this.containerSize = containerSize;
      UpdateContainer(controlSize);
    }
    public CenteredContainer2D(float controlWidth, float controlHeight, float containerWidth, float containerHeight)
      : this(new Vector2(controlWidth, controlHeight), new Vector2(containerWidth, containerHeight)) {
    }

    public void AddItem(Vector2 size, Vector2 position, string label) {
      packingItems.Add(new PackingItem(size, position, label));
    }
    public void AddItem(float width, float height, float x, float y, string label) {
      AddItem(new Vector2(width, height), new Vector2(x, y), label);
    }

    public void UpdateContainer(Vector2 controlSize) {
      xScaling = (controlSize.X - 4) / (containerSize.X); // leave 2 pixel space on each side
      yScaling = (controlSize.Y - 4) / (containerSize.Y);
    }
    public void UpdateContainer(float controlWidth, float controlHeight) {
      UpdateContainer(new Vector2(controlWidth, controlHeight));
    }


    public RectangleF GetContainerData() {
      //Compute centered rectangle
      return new RectangleF(2, 2, containerSize.X * xScaling, containerSize.Y * yScaling);
    }

    public struct LabeledRectangle {
      public string label;
      public RectangleF rectangle;

      public LabeledRectangle(string label, RectangleF rectangle) {
        this.label = label;
        this.rectangle = rectangle;
      }
    }

    public List<LabeledRectangle> GetItemRectangles() {
      return packingItems.Select(item =>
        new LabeledRectangle(item.label,
          new RectangleF(item.position.X * xScaling + 2, item.position.Y * yScaling + 2, item.size.X * xScaling, item.size.Y * yScaling)))
      .ToList();
    }
  }
}