using System.Collections.Generic;
namespace Netron.Diagramming.Core {
  /// <summary>
  /// Pen style command
  /// </summary>
  class PenStyleCommand : Command {
    #region Fields
    CollectionBase<IDiagramEntity> bundle;
    IController controller;

    IPenStyle newStyle;
    Dictionary<string, IPenStyle> previousStyles = new Dictionary<string, IPenStyle>();
    #endregion

    #region Properties




    /// <summary>
    /// Gets the entities.
    /// </summary>
    /// <value>The shape.</value>
    public CollectionBase<IDiagramEntity> Entities {
      get { return bundle; }
    }

    #endregion

    #region Constructor
    /// <summary>
    /// Initializes a new instance of the <see cref="T:PenStyleCommand"/> class.
    /// </summary>
    /// <param name="controller">The controller.</param>
    /// <param name="bundle">The bundle.</param>
    /// <param name="penStyle">The pen style.</param>
    public PenStyleCommand(IController controller, CollectionBase<IDiagramEntity> bundle, IPenStyle penStyle)
      : base(controller) {
      this.Text = "Fill style";
      this.controller = controller;
      this.bundle = bundle;//the bundle should contain only IShape and IConnection entities!
      this.newStyle = penStyle;
    }
    #endregion

    #region Methods

    /// <summary>
    /// Perform redo of this command.
    /// </summary>
    public override void Redo() {
      if (bundle == null || bundle.Count == 0)
        return;
      previousStyles.Clear();
      foreach (IDiagramEntity entity in bundle) {
        if (entity is IConnection) {
          previousStyles.Add(entity.Uid.ToString(), entity.PenStyle);
          (entity as IConnection).PenStyle = newStyle;
        }
      }
    }

    /// <summary>
    /// Perform undo of this command.
    /// </summary>
    public override void Undo() {
      if (bundle == null || bundle.Count == 0)
        return;
      foreach (IDiagramEntity entity in bundle) {
        if (entity is IConnection)
          (entity as IConnection).PenStyle = previousStyles[entity.Uid.ToString()];
      }




    }


    #endregion
  }

}