using FluentNHibernate.Automapping;
using FluentNHibernate.Cfg;
using FluentNHibernate.Cfg.Db;
using NHibernate;
using NHibernate.Cfg;
using Tanshu.Accounts.Conventions;
using Tanshu.Accounts.Entities;
using Tanshu.Accounts.SqlDAO;

namespace Tanshu.Accounts.Repository
{
    public sealed class SessionManager
    {
        private readonly Configuration cfg;
        private readonly ISessionFactory factory;
        private SessionManager()
        {
            cfg = GetConfiguration();
            factory = cfg.BuildSessionFactory();
        }

        //public static SessionManager Instance
        //{
        //    get { return Nested.sessionManager; }
        //}
        public static ISession Session
        {
            get { return Nested.sessionManager.GetSession(); }
        }
        public static IStatelessSession StatelessSession
        {
            get { return Nested.sessionManager.GetStatelessSession(); }
        }
        public static Configuration Configuration
        {
            get { return Nested.sessionManager.GetConfiguration(); }
        }
        private class Nested
        {
            static Nested() { }
            internal static readonly SessionManager sessionManager = new SessionManager();
        }

        public Configuration GetConfiguration()
        {
            var storeConfiguration = new StoreConfiguration();
            var persistenceModel = AutoMap.AssemblyOf<Voucher>(storeConfiguration)
                .Conventions.Setup(c =>
                {
                    c.Add<PrimaryKeyConvention>();
                    c.Add<CustomForeignKeyConvention>();
                    c.Add<ClassConvention>();
                    c.Add<CascadeConvention>();
                    //c.Add<AllowNullConvention>();
                    //c.Add<NotNullConvention>();
                    //c.Add(DefaultLazy.Never());
                    //c.Add<EnumConvention>();
                });

            return Fluently.Configure()
                .Database(MsSqlConfiguration.MsSql2005.ConnectionString(p => p.FromConnectionStringWithKey("FluentCon")))
                .Mappings(m => m.AutoMappings.Add(persistenceModel))
                .BuildConfiguration()
                .SetInterceptor(new NHSQLInterceptor());
        }
        public ISession GetSession()
        {
            return factory.OpenSession();
        }
        public IStatelessSession GetStatelessSession()
        {
            return factory.OpenStatelessSession();
        }
    }
}