using System;
using NHibernate;
using NHibernate.Cfg;
using System.Web;
using NetPuan.BDO;

namespace NetPuan.DAO
{

	public class NHibernateHelper {
    	
    	public static readonly ISessionFactory SessionFactory;
    	
    	static NHibernateHelper() {                                    
        	try 
        	{
        	
        		log4net.Config.XmlConfigurator.Configure();
            	Configuration cfg = new Configuration();
            	

            	NHibernate.Mapping.Attributes.HbmSerializer.Default.Validate = true; // Enable validation (optional)
            	SessionFactory = cfg.Configure().BuildSessionFactory();

				
				using( System.IO.MemoryStream stream =

						NHibernate.Mapping.Attributes.HbmSerializer.Default.Serialize(
						System.Reflection.Assembly.Load("NetPuan.BDO")) )

				cfg.AddInputStream(stream); // Send the mapping information to NHibernate configuration



			// Create the table in the database for the entity Message

				System.Console.Out.WriteLine("Creating the table in the database for the entity Message...");

				new NHibernate.Tool.hbm2ddl.SchemaExport(cfg).Create(true, true);
        		
        		
        
    		} catch (Exception ex) {
        		Console.Error.WriteLine(ex);                           
        		throw new Exception("NHibernate initialization failed", ex);
    		}
		}
		
		public static ISession OpenSession() {
	    	return SessionFactory.OpenSession();
		}
		
		
		public static ISession GetCurrentSession()
		{
			return (ISession) HttpContext.Current.Items["NHIBERNATE_SESSION"];
		
		}
		
	}
}