using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using Tanshu.Accounts.Contracts;
using Tanshu.Data.DAO;
using Tanshu.Accounts.DAOFactory;
using FluentNHibernate.Automapping;
using FluentNHibernate.Cfg;

namespace Tanshu.Accounts.SqlDAO
{
    public class ProductGroupModifierDAO : BaseDAO, IProductGroupModifierDAO
    {
        public ProductGroupModifierDAO(IConnectionDAO connection)
            : base(connection)
        { }

        public bool Insert(ProductGroupModifierBO productGroupModifier)
        {
            using (SqlCommand cmd = new SqlCommand(@"
SELECT @ProductGroupModifierID = ISNULL(MAX(ProductGroupModifierID),0) + 1 FROM ProductGroupModifierID;
INSERT INTO ProductGroupModifier (ProductGroupModifierID, ProductGroupID, ModifierID, ShowAutomatically) VALUES (@ProductGroupModifierID, @ProductGroupID, @ModifierID, @ShowAutomatically);
"))
            {
                cmd.Parameters.Add("@ProductGroupModifierID", System.Data.SqlDbType.Int);
                cmd.Parameters["@ProductGroupModifierID"].Direction = System.Data.ParameterDirection.Output;
                if (productGroupModifier.ProductGroupID.HasValue)
                    cmd.Parameters.AddWithValue("@ProductGroupID", productGroupModifier.ProductGroupID);
                else
                    cmd.Parameters.AddWithValue("@ProductGroupID", DBNull.Value);
                cmd.Parameters.AddWithValue("@ModifierID", productGroupModifier.ModifierID);
                cmd.Parameters.AddWithValue("@ShowAutomatically", productGroupModifier.ShowAutomatically);
                connection.ExecuteNonQuery(cmd);
                productGroupModifier.ProductGroupModifierID = (int)cmd.Parameters["@ProductGroupModifierID"].Value;
                return true;
            }
        }

        public bool Update(ProductGroupModifierBO productGroupModifier)
        {
            using (SqlCommand cmd = new SqlCommand(@"UPDATE ProductGroupModifier SET ProductGroupID = @ProductGroupID, ModifierID = @ModifierID, ShowAutomatically = @ShowAutomatically WHERE ProductGroupModifierID = @ProductGroupModifierID;"))
            {
                cmd.Parameters.AddWithValue("@ProductGroupModifierID", productGroupModifier.ProductGroupModifierID);
                if (productGroupModifier.ProductGroupID.HasValue)
                    cmd.Parameters.AddWithValue("@ProductGroupID", productGroupModifier.ProductGroupID);
                else
                    cmd.Parameters.AddWithValue("@ProductGroupID", DBNull.Value);
                cmd.Parameters.AddWithValue("@ModifierID", productGroupModifier.ModifierID);
                cmd.Parameters.AddWithValue("@ShowAutomatically", productGroupModifier.ShowAutomatically);
                connection.ExecuteNonQuery(cmd);
                return true;
            }
        }

        public bool Delete(int productGroupModifierID)
        {
            using (SqlCommand cmd = new SqlCommand("DELETE FROM ProductGroupModifier WHERE ProductGroupModifierID = @ProductGroupModifierID"))
            {
                cmd.Parameters.AddWithValue("@ProductGroupModifierID", productGroupModifierID);
                connection.ExecuteNonQuery(cmd);
                return true;
            }
        }

        public List<ProductGroupModifierBO> GetProductGroupModifiers(Guid productGroupID)
        {
            SqlCommand cmd = new SqlCommand("SELECT * FROM ProductGroupModifier Where ProductGroupID = @ProductGroupID;");
            cmd.Parameters.AddWithValue("@ProductGroupID", productGroupID);
            return BusinessObjectDAO<ProductGroupModifierBO>.GetBusinessObjects(connection.ExecuteReader(cmd));
        }

        public List<ProductGroupModifierBO> GetProductGroupModifiers()
        {
            using (SqlCommand cmd = new SqlCommand("SELECT * FROM ProductGroupModifier"))
            {
                return BusinessObjectDAO<ProductGroupModifierBO>.GetBusinessObjects(connection.ExecuteReader(cmd));
            }
        }

        public bool HasCompulsoryModifier(Guid productGroupID)
        {
            using (SqlCommand cmd = new SqlCommand("SELECT COUNT(*) FROM ProductGroupModifier WHERE ShowAutomatically = 1 AND (ProductGroupID IS NULL OR ProductGroupID = @ProductGroupID)"))
            {
                cmd.Parameters.AddWithValue("@ProductGroupID", productGroupID);
                return (int)connection.ExecuteScalar(cmd) > 0;
            }
        }
    }
}