using System;
using System.ComponentModel;
using System.Drawing;
namespace Netron.Diagramming.Core {
  /// <summary>
  /// Abstract base class for all descriptors of diagram entities inheriting from <see cref="DiagramEntityBase"/>.
  /// This descriptor collects all properties common to all the entities inheriting from the <see cref="IDiagramEntity"/> interface.
  /// </summary>
  abstract class DiagramEntityBaseDescriptor : DescriptorBase {

    #region Constants
    /// <summary>
    /// the 'Layout' section
    /// </summary>
    protected const string constLayout = "Layout";
    /// <summary>
    /// the 'General' section
    /// </summary>
    protected const string constGeneral = "General";
    /// <summary>
    /// the 'content' section
    /// </summary>
    protected const string constContent = "Content";
    #endregion

    #region Fields

    #endregion

    #region Properties

    #endregion

    #region Constructor
    /// <summary>
    /// Initializes a new instance of the <see cref="DiagramEntityBaseDescriptor"/> class.
    /// </summary>
    /// <param name="provider">The provider.</param>
    /// <param name="objectType">Type of the object.</param>
    public DiagramEntityBaseDescriptor(TypeDescriptionProvider provider, Type objectType)
      : base(provider, objectType) {
      AddBaseProperties();
    }
    #endregion

    #region Methods
    /// <summary>
    /// Adds the base properties of the <see cref="ShapeBase"/>
    /// </summary>
    private void AddBaseProperties() {
      this.AddProperty("Entity Name", typeof(string), constGeneral, "The name of the type");
      this.AddProperty("Name", typeof(string), constGeneral, "The name of the entity");
      this.AddProperty("Rectangle", typeof(Rectangle), constLayout, "The bounding rectangle of the entity");
      this.AddProperty("Scene index", typeof(int), constLayout, "The index of the entity in the scane graph.");
      this.AddProperty("Tag", typeof(object), constLayout, "General purpose tag.");
    }


    /// <summary>
    /// Override this method to return the appropriate value corresponding to the property
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected override void GetValue(object sender, PropertyEventArgs e) {
      switch (e.Name.ToLower()) {
        case "entity name":
          e.Value = (e.Component as DiagramEntityBase).EntityName;
          break;
        case "name":
          e.Value = (e.Component as DiagramEntityBase).Name;
          break;
        case "rectangle":
          e.Value = (e.Component as DiagramEntityBase).Rectangle;
          break;
        case "scene index":
          e.Value = (e.Component as DiagramEntityBase).SceneIndex;
          break;
        case "tag":
          e.Value = (e.Component as DiagramEntityBase).Tag;
          break;
      }


    }



    /// <summary>
    /// Override this method to set the appropriate value corresponding to the property
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected override void SetValue(object sender, PropertyEventArgs e) {
      switch (e.Name.ToLower()) {
        case "name":
          (e.Component as DiagramEntityBase).Name = (string)e.Value;
          break;
        case "tag":
          (e.Component as DiagramEntityBase).Tag = (object)e.Value;
          break;
      }
    }


    #endregion
  }
}