using System;
using System.Collections.Generic;
using System.Text;
using Tanshu.Accounts.Contracts;
using System.Data.SqlClient;
using Tanshu.Data.DAO;
using Tanshu.Accounts.Entities;
using Tanshu.Accounts.SqlDAO;
using NHibernate.Criterion;
using NHibernate;

namespace Tanshu.Accounts.Repository
{
    public class ProductGroupBI
    {
        public ProductGroup GetProductGroup(int productGroupID)
        {
            using (var session = SessionManager.Session)
            {
                return session.Get<ProductGroup>(productGroupID);
            }
        }
        public ProductGroup GetProductGroupByName(string name)
        {
            using (var session = SessionManager.Session)
            {
                return session.CreateCriteria<ProductGroup>()
                    .Add(Restrictions.Eq("Name", name))
                    .UniqueResult<ProductGroup>();
            }
        }
        public void Insert(ProductGroup productGroup)
        {
            using (var session = SessionManager.Session)
            {
                session.Save(productGroup);
            }
        }
        public void Update(ProductGroup productGroup)
        {
            using (var session = SessionManager.Session)
            {
                session.Update(productGroup);
            }
        }
        public IList<ProductGroup> GetProductGroups()
        {
            using (var session = SessionManager.Session)
            {
                return session.CreateCriteria<ProductGroup>()
                    .List<ProductGroup>();
            }
        }
        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;
            }
        }
    }
}