using YLErp.Configuration;

namespace YLErp.Modules.UnderlyingModule
{
    /// <summary>
    /// 标的分红率服务
    /// </summary>
    public class UnderlyingDividenRateService : YLBaseService
    {
        public UnderlyingDividenRateService(OptUserInfo userInfo) : base(userInfo)
        {

        }

        /// <summary>
        /// 获取标的分红率
        /// </summary>
        public UnderlyingDividenRateResult GetDividenRate(UnderlyingDividenRateRequest req)
        {
            if (req is null)
            {
                throw new ArgumentNullException(nameof(req));
            }

            if (string.IsNullOrEmpty(req.UnderlyingCode))
            {
                throw new ServiceException("缺少标的代码");
            }

            var um = DataCacheProvider.GetUnderlyingDataSource().GetData(req.UnderlyingCode);

            if (um == null)
            {
                throw new ServiceException("标的信息未找到:" + req.UnderlyingCode);
            }

            var qry = from x in DbContext.dividendrate_record
                      where x.TradeType.Contains(req.TradeType)
                      && req.ValueDate >= x.ValueDate
                      && (x.OptionType == req.OptionType || x.OptionType == "全部")
                      select x;
            var list = qry.ToList();
            var record = list.Where(x => x.UnderlyingCode.Split(',').Any(code => code == req.UnderlyingCode))
                        .OrderByDescending(x => x.OptDate).ThenByDescending(x => x.ValueDate);

            if (record.Any())
            {
                return new UnderlyingDividenRateResult
                {
                    DividendRate = record.First().DividendRate
                };
            }

            var query = from n in DbContext.underlying_manager
                        join m in DbContext.UnderlyingDividend.Where(a => a.ValueDate >= req.ValueDate)
                        on n.id equals m.UnderlyingId into ms
                        from m in ms.DefaultIfEmpty()
                        where n.UnderlyingCode == req.UnderlyingCode
                        select m == null ? n.DividendRate : m.DividendRate;

            return new UnderlyingDividenRateResult
            {
                DividendRate = query.FirstOrDefault() ?? 0
            };
        }
    }

    /// <summary>
    /// 标的分红率请求
    /// </summary>
    public class UnderlyingDividenRateRequest
    {
        /// <summary>
        /// 标的代码
        /// </summary>
        public string UnderlyingCode { get; set; }

        /// <summary>
        /// 取值日期
        /// </summary>
        public DateTime ValueDate { get; set; }

        /// <summary>
        /// 交易类型(国元需要)
        /// </summary>
        public string TradeType { get; set; }

        /// <summary>
        /// 看涨看跌(国元需要)
        /// </summary>
        public string OptionType { get; set; }
    }

    /// <summary>
    /// 标的分红率
    /// </summary>
    public class UnderlyingDividenRateResult
    {
        /// <summary>
        /// 标的分红率
        /// </summary>
        public double? DividendRate { get; set; }
    }
}