using System;
using System.Collections.Generic;
using System.Transactions;

namespace bnhtrade.Core.Logic.Sku
{
    public class SkuService : UnitOfWorkBase
    {
        /// <summary>
        /// Used for retriving an SKU ID by parameters. If no match, can create a new SKU if required.
        /// </summary>
        /// <param name="productId">The product Id for the SKU</param>
        /// <param name="conditionId">The condition Id for the SKU</param>
        /// <param name="accountTaxCodeId">The tax code Id for the SKU</param>
        /// <param name="noMatchCreateNew">When set to true, if no match is made, function will create a new sku and return the id for that</param>
        /// <returns>Return the id for the new or existing sku or, dependant on set parameters, 0 if not found</returns>
        /// <exception cref="Exception"></exception>
        public int GetSkuId(int productId, int conditionId, int accountTaxCodeId, bool noMatchCreateNew)
        {
            return WithUnitOfWork(uow =>
            {
                int? skuId = uow.SkuRepository.ReadSkuId(productId, conditionId, accountTaxCodeId);
                if (skuId != null)
                {
                    return (int)skuId;
                }
                else if (noMatchCreateNew == false)
                {
                    return 0;
                }
                else
                {
                    int newSkuId = uow.SkuRepository.InsertNewSku(productId, conditionId, accountTaxCodeId);
                    CommitIfOwned(uow);
                    return newSkuId;
                }
            });
        }
    }
}