using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using Tanshu.Accounts.Entities;
using NHibernate;

namespace Tanshu.Accounts.Repository
{
    public class ProductGroupBI : FluentGenericBase<ProductGroup>
    {
        public ProductGroupBI()
            : base()
        { }

        public ProductGroupBI(bool beginTransaction)
            : base(beginTransaction)
        { }

        public ProductGroupBI(ISession session)
            : base(session)
        { }

        public ProductGroupBI(ISession session, bool beginTransaction)
            : base(session, beginTransaction)
        { }

        public new IList<ProductGroup> List()
        {
            return Query()
                .OrderBy(x => x.SortOrder).Asc
                .ThenBy(x => x.Name).Asc
                .List();
        }
        public new IList<ProductGroup> List(Expression<Func<ProductGroup, bool>> query)
        {
            return Query()
                .Where(query)
                .OrderBy(x => x.SortOrder).Asc
                .ThenBy(x => x.Name).Asc
                .List();
        }
        public IList<string> GetProductGroupTypes()
        {
            const string query = @"select distinct(pg.GroupType) from ProductGroup pg order by pg.GroupType";
            var hnq = Session.CreateQuery(query);
            return hnq.List<string>();
        }
        public ProductGroup GetProductGroupOfProduct(int productID)
        {
            using (var session = SessionManager.Session)
            {
                var item = (from p in session.QueryOver<Product>()
                            where p.ProductID == productID
                            select p.ProductGroup).SingleOrDefault<ProductGroup>();
                NHibernateUtil.Initialize(item);
                return item;
            }
        }
    }
}