///////////////////////////////////////////////////////////
//  Bool.cs
//  Implementation of Class TemplateServiceResolver
//  CSLA type: Read-only object
//  Created on: 9-Nov-2007
//  Object design: John 
//	Coded: 9-Nov-2007
///////////////////////////////////////////////////////////

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



namespace GZTW.AyaNova.BLL
{
    
    /// <summary>
    ///Resolves which workorder service template
    /// is the default.
    /// 
    /// Checks for client template, user template and global template
    /// returns most responsible template in order of client, user, global
    /// or guid empty if none found
    /// </summary>
    [Serializable, EditorBrowsable(EditorBrowsableState.Never)]
    public class TemplateServiceResolver : ReadOnlyBase
    {

        #region Attributes
        private Guid mTemplateID;
        #endregion

        #region Constructor

        /// <summary>
        /// Private constructor to prevent direct instantiation
        /// </summary>
        private TemplateServiceResolver()
        {
            mTemplateID = Guid.Empty;
        }
        #endregion


        #region Static methods



        /// <summary>
        /// Returns template ID
        /// </summary>
        /// <param name="ClientID">Client for workorder</param>
        /// <param name="UserID">Current user ID</param>
        /// <returns>Guid of template that applies</returns>
        public static Guid ResolveTemplate(Guid ClientID, Guid UserID)
        {

            return ((TemplateServiceResolver)DataPortal.Fetch(new Criteria(ClientID,UserID))).mTemplateID;

        }


        #endregion

        #region DAL DATA ACCESS
        /// 
        /// <param Bool="Criteria"></param>
        protected override void DataPortal_Fetch(object Criteria)
        {
            Criteria crit = (Criteria)Criteria;

            Guid ClientTemplateID=Guid.Empty;
            Guid UserTemplateID=Guid.Empty;

            DBCommandWrapper cmClient = DBUtil.DB.GetSqlStringCommandWrapper(
                    "SELECT ADEFAULTSERVICETEMPLATEID FROM aClient WHERE " +
                        "(AID = @ID)"
                    );
            cmClient.AddInParameter("@ID", DbType.Guid, crit.ClientID);
            ClientTemplateID = DBUtil.ToGuid(DBUtil.DB.ExecuteScalar(cmClient));

            if (crit.UserID != Guid.Empty)
            {
                DBCommandWrapper cmUser = DBUtil.DB.GetSqlStringCommandWrapper(
                        "SELECT ADEFAULTSERVICETEMPLATEID FROM aUser WHERE " +
                            "(AID = @ID)"
                        );
                cmUser.AddInParameter("@ID", DbType.Guid, crit.UserID);
                UserTemplateID = DBUtil.ToGuid(DBUtil.DB.ExecuteScalar(cmUser));
            }

            //Client - highest precedence
            if (ClientTemplateID != Guid.Empty)
            {
                mTemplateID = ClientTemplateID;
                return;
            }
            //User - next highest precedence
            if (UserTemplateID != Guid.Empty)
            {
                mTemplateID = UserTemplateID;
                return;
            }

            //Global - lowest precedence
            if (AyaBizUtils.GlobalSettings.DefaultServiceTemplateID != Guid.Empty)
                mTemplateID = AyaBizUtils.GlobalSettings.DefaultServiceTemplateID;

        }



        #endregion

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

            public Guid ClientID;
            public Guid UserID;
            public Criteria(Guid _ClientID, Guid _UserID)
            {
                ClientID = _ClientID;
                UserID = _UserID;

            }

        }
        #endregion

    }//end class

}//end namespace GZTW.AyaNova.BLL