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;

namespace Tanshu.Accounts.Repository
{
    public static class ProductBI
    {
        public static void Insert(Product product)
        {
            using (var session = SessionManager.Session)
            {
                session.Save(product);
            }
        }
        public static void Update(Product product)
        {
            using (var session = SessionManager.Session)
            {
                session.Update(product);
            }

        }
        public static bool Delete(int productID)
        {
            using (var session = SessionManager.Session)
            {
                session.Delete(new Product() { ProductID = productID });
                return true;
            }
        }
        public static Product GetProductFromName(string nameAndUnits)
        {
            using (var session = SessionManager.Session)
            {
                return session.CreateCriteria<Product>()
                    .Add(Expression.Eq("Name + ' (' + Units + ')'", nameAndUnits))
                    .UniqueResult<Product>();
            }
        }
        public static Product GetProduct(int productID)
        {
            using (var sessioin = SessionManager.Session)
            {
                return sessioin.Get<Product>(productID);
            }
        }
        public static decimal GetProductStock(DateTime date, int productID, int? voucherID)
        {
            throw new NotImplementedException();
        }
        public static IList<Product> GetProducts()
        {
            using (var session = SessionManager.Session)
            {
                return session.CreateCriteria<Product>()
                    .List<Product>();
            }
        }

        public static List<ProductDisplaySmall> GetFilteredProducts(Dictionary<string, string> filter)
        {
            throw new NotImplementedException();
        }

        public static List<ProductDisplaySmall> GetUnFilteredProducts()
        {
            Dictionary<string, string> filter = new Dictionary<string, string>();
            filter.Add("Name", "");
            filter.Add("Type", "");
            return GetFilteredProducts(filter);
        }
        public static IList<Product> GetProducts(int productGroupID)
        {
            using (var session = SessionManager.Session)
            {
                return (from product in session.QueryOver<Product>()
                        where product.ProductGroup.ProductGroupID == productGroupID
                        select product).List();
            }
        }
    }
}