using System;
using System.Drawing;
using Netron.Diagramming.Core.Analysis;
namespace Netron.Diagramming.Core {
  /// <summary>
  /// Base class for graph layout
  /// </summary>
  abstract class LayoutBase : ActionBase, ILayout {
    #region Fields
    private IGraph graph;

    private string mName;
    private Rectangle mBounds;
    private PointF mCenter;
    private const int defaultSpan = 400;
    private IController mController = null;
    #endregion

    #region Properties

    /// <summary>
    /// Gets the nodes of the graph. This is another casting of the shapes collection of the model.
    /// </summary>
    /// <value>The nodes.</value>
    public CollectionBase<INode> Nodes {
      get { return graph.Nodes; }
    }

    /// <summary>
    /// Gets the edges of the graph. This is just another casting of the connection collection of the model.
    /// </summary>
    /// <value>The edges.</value>
    public CollectionBase<IEdge> Edges {
      get { return graph.Edges; }
    }

    public IController Controller {
      get { return mController; }
    }

    protected int DefaultRunSpan {
      get { return defaultSpan; }
    }

    /// <summary>
    /// Gets or sets the center of the layout. This can be the arithmetic middle
    /// of the bounding area or can be set independently.
    /// </summary>
    public PointF Center {
      get { return mCenter; }
      set { mCenter = value; }
    }

    public IGraph Graph {
      get { return graph; }
      set { graph = value; }
    }
    /// <summary>
    /// Gets or sets the bounds of the layout surface.
    /// </summary>
    /// <value>The bounds.</value>
    public Rectangle Bounds {
      get { return mBounds; }
      set { mBounds = value; }

    }
    public string LayoutName {
      get { return mName; }
    }
    #endregion

    #region Constructor
    /// <summary>
    /// Initializes a new instance of the <see cref="T:LayoutBase"/> class.
    /// </summary>
    /// <param name="name">The name.</param>
    /// <param name="controller">The controller.</param>
    protected LayoutBase(string name, IController controller)
      : base(name) {
      mName = name;
      mController = controller;
    }

    #endregion

    #region Methods
    protected void setX(INode item, INode referrer, double x) {

      //float sx = item.Rectangle.X;
      //if(float.IsNaN(sx))
      //    sx = (referrer != null ? referrer.Rectangle.X : x);

      item.MoveBy(new Point(Convert.ToInt32(x - item.Rectangle.X), 0));
      //Trace.WriteLine("setX(" + x + ",0)");

    }
    protected void setY(INode item, INode referrer, double y) {

      //float sx = item.Rectangle.X;
      //if(float.IsNaN(sx))
      //    sx = (referrer != null ? referrer.Rectangle.X : x);

      item.MoveBy(new Point(0, Convert.ToInt32(y - item.Rectangle.Y)));
      //Trace.WriteLine("setY(0," + y +")");
    }
    #endregion



  }

}