using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Remoting.Messaging;
using System.Web;
using EAbs.Common.DB;

namespace EAbs.Web
{
    public static class UnitOfWorkStore
    {
        public static object GetData(string key)
        {
            //if (HttpContext.Current != null)
                return HttpContext.Current.Items[key];
            //return CallContext.GetData(key);
        }

        public static void SetData(string key, object data)
        {
            //if (HttpContext.Current != null)
                HttpContext.Current.Items[key] = data;
            //else
            //    CallContext.SetData(key, data);
        }
    }

    public class DBContextWrapper
    {
        private static readonly string UOW_INSTANCE_KEY = "ConfigContext_Instance";
        private static readonly object _objSync = new object();

        private readonly ConfigContext _context;

        private DBContextWrapper()
        {
            _context = new ConfigContext();
        }

        public ConfigContext Context
        {
            get { return _context; }
        }

        public static DBContextWrapper Instance
        {
            get
            {
                object instance = UnitOfWorkStore.GetData(UOW_INSTANCE_KEY);
                if (instance == null)
                {
                    lock (_objSync)
                    {
                        if (instance == null)
                        {
                            instance = new DBContextWrapper();
                            UnitOfWorkStore.SetData(UOW_INSTANCE_KEY, instance);
                        }
                    }
                }
                return (DBContextWrapper)instance;
            }
        }
    }
}