using System;
using System.Runtime.InteropServices;
using System.IO;
using System.Windows.Forms;
using System.Reflection;
using MsdnMag;

namespace Moth
{
  [PreviewHandler("The Moth prev hand", ".dll", "{EA76F5AC-2227-42f9-8FF3-2C08B3F1737D}")]
  [ProgId("Moth.TheMothPreviewHandler")]
  [Guid("CD0B9CD6-11E4-40b1-84E5-845939FBF292")]
  [ClassInterface(ClassInterfaceType.None)]
  [ComVisible(true)]
  public sealed class TheMothPreviewHandler : FileBasedPreviewHandler
  {
    protected override PreviewHandlerControl CreatePreviewHandlerControl()
    {
      return new TheMothPreviewHandlerControl();
    }

    private sealed class TheMothPreviewHandlerControl : FileBasedPreviewHandlerControl
    {
      public override void Load(FileInfo file)
      {
        string s;
        try
        {
          Assembly ass = Assembly.LoadFrom(file.FullName);

          s =
            "1. FullName: \r\n" + ass.FullName + "\r\n\r\n" +
            "2. CodeBase: \r\n" + ass.CodeBase + "\r\n\r\n" +
            "3. Built against: " + ass.ImageRuntimeVersion + "\r\n\r\n" +
            "4. Referenced Assemblies: \r\n";

          AssemblyName[] refs = ass.GetReferencedAssemblies();
          for (int i = 0; i < refs.Length; i++)
            s += " -> " + refs[i].Name + "\r\n";
        }
        catch (BadImageFormatException)
        {
          s = "Not a managed assembly.";
        }
        catch (Exception ex)
        {
          s = "Unexpected error. \r\n" + ex.ToString();
        }

        TextBox textBox1 = new TextBox();
        textBox1.ReadOnly = true;
        textBox1.Multiline = true;
        //textBox1.WordWrap = false;
        textBox1.ScrollBars = ScrollBars.Both;
        textBox1.Dock = DockStyle.Fill;
        textBox1.Text = s;
        this.Controls.Add(textBox1);
      }
    }
  }
}