///////////////////////////////////////////////////////////
//  Bool.cs
//  Implementation of Class PartByWarehouseInventoryManager
//  CSLA type: Read-only object
//  Created on: 25-Oct-2005
//  Object design: John 
//	Coded: John 25-Oct-2005
///////////////////////////////////////////////////////////

using System;
using System.Data;
using CSLA.Data;
using GZTW.Data;
using CSLA;
using System.Threading;
using CSLA.Security;



namespace GZTW.AyaNova.BLL
{
    /// <summary>
    /// Used internally to manage the warehouses in the database
    /// and keep the quantity of empty records to a minimum saving db space
    /// 
    /// Creates a fresh record if none exists
    /// </summary>
    [Serializable]
    internal class PartByWarehouseInventoryManager : ReadOnlyBase
    {


        #region Constructor

        /// <summary>
        /// Private constructor to prevent direct instantiation
        /// </summary>
        private PartByWarehouseInventoryManager()
        {

        }
        #endregion
       

        #region Static methods

        /// <summary>
        /// Creates a new record if none exists
        /// </summary>
        /// <param name="PartID">ID of part</param>
        /// <param name="PartWarehouseID">ID of warehouse</param>
        /// <returns>nothing</returns>
        public static void EnsureItem(Guid PartID, Guid PartWarehouseID)
        {
            //case 3175 - do nothing if there are no valid parameters
            if (PartID == Guid.Empty || PartWarehouseID == Guid.Empty)
                return;

            DataPortal.Fetch(new Criteria(PartID, PartWarehouseID, null));

        }

        /// <summary>
        /// Creates a new record if none exists within a transaction
        /// </summary>
        /// <param name="PartID">ID of part</param>
        /// <param name="PartWarehouseID">ID of warehouse</param>
        /// <param name="tr">Database transaction</param>
        /// <returns></returns>
        internal static void EnsureItem(Guid PartID, Guid PartWarehouseID, IDbTransaction tr)
        {
            //case 3175 - do nothing if there are no valid parameters
            if (PartID == Guid.Empty || PartWarehouseID == Guid.Empty)
                return;

            DataPortal.Fetch(new Criteria(PartID, PartWarehouseID, tr));

        }


        #endregion

        #region DAL DATA ACCESS
        /// 
        /// <param Bool="Criteria"></param>
        protected override void DataPortal_Fetch(object Criteria)
        {
            Criteria crit = (Criteria)Criteria;
            DBCommandWrapper cm = DBUtil.DB.GetSqlStringCommandWrapper(
                "SELECT AID FROM aPartByWarehouseInventory " +
                "WHERE (aPartID = @PartID) AND (aPartWarehouseID = @PartWarehouseID)"
                );
            cm.AddInParameter("@PartID", DbType.Guid, crit.PartID);
            cm.AddInParameter("@PartWarehouseID", DbType.Guid, crit.PartWarehouseID);

            SafeDataReader dr = null;
            if (crit.tr == null)
                dr = new SafeDataReader(DBUtil.DB.ExecuteReader(cm));
            else
                dr = new SafeDataReader(DBUtil.DB.ExecuteReader(cm, crit.tr));
            if (!dr.Read())
            {
                //create one because it doesn't exist               
                dr.Close();

                DBCommandWrapper cmInvent = DBUtil.GetCommandFromSQL(
                            "INSERT INTO aPartByWarehouseInventory ( " +
                            "aID,  aPartID, aPartWarehouseID, " +
                            "aQuantityOnHand, aQuantityOnOrder, " +
                            "aQtyOnOrderCommitted, aMinStockLevel, " +
                            "aCreated,aModified,aCreator,aModifier) VALUES " +
                            "(@ID,@PartID,@PartWarehouseID, " +
                            "0,0,0,0, " +
                            "@Created,@Modified,@CurrentUserID,@CurrentUserID)"
                            );



                cmInvent.Command.Parameters.Clear();
                cmInvent.AddInParameter("@ID", DbType.Guid, Guid.NewGuid());                
                cmInvent.AddInParameter("@PartID", DbType.Guid, crit.PartID);
                cmInvent.AddInParameter("@PartWarehouseID", DbType.Guid, crit.PartWarehouseID);


                //Standard fields
                cmInvent.AddInParameter("@CurrentUserID", DbType.Guid, User.CurrentThreadUserID);
                cmInvent.AddInParameter("@Created", DbType.DateTime, DBUtil.ToUTC(DBUtil.CurrentWorkingDateTime));
                cmInvent.AddInParameter("@Modified", DbType.DateTime, DBUtil.ToUTC(DBUtil.CurrentWorkingDateTime));

                if (crit.tr != null)
                    DBUtil.DB.ExecuteNonQuery(cmInvent, crit.tr);
                else
                    DBUtil.DB.ExecuteNonQuery(cmInvent);




            }
            else          
                dr.Close();

        }



        #endregion

        #region criteria
        /// <summary>
        /// Criteria for identifying existing object
        /// </summary>
        [Serializable]
        private class Criteria
        {

            public Guid PartID;
            public Guid PartWarehouseID;
            public IDbTransaction tr;

            public Criteria(Guid _PartID, Guid _PartWarehouseID, IDbTransaction _tr)
            {
                PartID = _PartID;
                PartWarehouseID = _PartWarehouseID;
                tr = _tr;
            }

        }
        #endregion

    }//end Bool

}//end Boolspace GZTW.AyaNova.BLL