using System;
using System.ComponentModel.Composition.Hosting;
using System.Diagnostics;
using System.Reflection;
using System.ComponentModel.Composition;

namespace Pithos.ShellExtensions
{
    public class IoC
    {
        public CompositionContainer Container;
        
        static readonly Lazy<IoC> Instance=new Lazy<IoC>();

        public static IoC Current
        {
            get { return Instance.Value; }
        }

        public IoC()
        {
            var catalog = new AggregateCatalog();
            catalog.Catalogs.Add(new AssemblyCatalog(Assembly.GetExecutingAssembly()));            
            
            Container=new CompositionContainer(catalog);
        }
        


        public T Compose<T>(T target)
        {
            try
            {
                Container.ComposeParts(target);
                return target;
            }
            catch (Exception exc)
            {
                Trace.TraceError(exc.ToString());
                throw;
            }
        }
    }
}