namespace YLErp.Modules.ExchangeOptionTradeModule
{
    /// <summary>
    /// 场内期权波动率保存服务
    /// </summary>
    public class ExchangeOptionVolSaveService : YLBaseService
    {
        public ExchangeOptionVolSaveService(OptUserInfo userInfo) : base(userInfo)
        {
        }

        /// <summary>
        /// 保存场内期权波动率
        /// </summary>
        public int SaveExchangeOptionVol(string optionCode, DateTime valueDate, double volValue, ExchangeOptionVolUseFlag useFlag = ExchangeOptionVolUseFlag.FixedValue)
        {
            if (string.IsNullOrWhiteSpace(optionCode))
            {
                throw new ArgumentException("参数不能为空值", nameof(optionCode));
            }

            if (useFlag == ExchangeOptionVolUseFlag.FixedValue && volValue < 0)
            {
                throw new ArgumentException("请设置合理的场内期权波动率", nameof(volValue));
            }

            valueDate = valueDate.Date;

            var record = DbContext.exchange_option_vol.FirstOrDefault(x => x.OptionCode == optionCode && x.ValueDate == valueDate);

            if (record == null)
            {
                record = new ExchangeOptionVol()
                {
                    OptionCode = optionCode,
                    ValueDate = valueDate,
                    Volatility = volValue
                };

                DbContext.exchange_option_vol.Add(record);
            }
            else if (useFlag == ExchangeOptionVolUseFlag.FixedValue)
            {
                record.Volatility = volValue;
            }

            record.UseFlag = useFlag;
            record.OptId = UserId;
            record.OptDate = OptDate;
            return DbContext.SaveChanges();
        }
    }
}