using YLErp.Modules.CalculationModule;
using YLErp.Modules.EodModule;

namespace YLErp.BLL.Eod
{
    /// <summary>
    /// 日终结算基类
    /// </summary>
    public class EodOperationBase
    {
        /// <summary>
        /// 根据交易方向判断是否需要加符号
        /// </summary>
        public static int GetSign(string tradeSide)
        {
            return TradeCalcHelper.GetBuySellSign(tradeSide);
        }

        /// <summary>
        /// 获取收盘成功的最后一个结算日(isPreviousDate:date参数的上一日)
        /// </summary>
        public static DateTime GetLastSettlementDate(DateTime date, bool isPreviousDate = false)
        {
            return isPreviousDate ? EodDataHelper.GetPreSettleDate(date) : EodDataHelper.GetLastSettleDate(date);
        }

        /// <summary>
        /// 获取结算价收盘成功的最后一个结算日
        /// </summary>
        /// <param name="previousDateIsDefault">查询不到最后收盘日时是否返回当年最早收盘价收盘日,false返回DateTime.MinValue</param>
        public static DateTime GetLastSettlementDate_Settle(bool lastSettleDateIsDefault = true)
        {
            DateTime? date = null;
            using (var db = new YLContext())
            {
                date = db.eod_pnl_s.Select(O => O.ValueDate).OrderByDescending(O => O).FirstOrDefault();
                if (date == null || date == DateTime.MinValue)
                {
                    if (lastSettleDateIsDefault)
                    {
                        var accruedTotalPnlStartDate = valuedateBLL.SystemDate.AccruedTotalPnlStartDate ?? DateTime.Today.AddDays(-DateTime.Today.DayOfYear + 1);
                        date = db.eodStatus.Where(t => t.Status == "已收盘" && t.ValueDate >= accruedTotalPnlStartDate).Min(O => (DateTime?)O.ValueDate) ?? DateTime.MinValue;
                    }
                    else
                    {
                        date = DateTime.MinValue;
                    }
                }
            }
            return date.Value;
        }

        /// <summary>
        /// 获取持仓盈亏
        /// </summary>
        public static double GetPositionPnl(double Pv, double TradePrice, double Notional, double OriginalNotional, string BuySell)
        {
            var d = (double.IsNaN(Pv) ? 0.0 : Pv) - TradePrice * Notional / OriginalNotional * GetSign(BuySell);
            return double.IsNaN(d) ? 0 : d;
        }

        /// <summary>
        /// 获取持仓成本(交易员角度)
        /// </summary>
        public static double GetPositionCost(double TradePrice, double PositionNotional, double OriginalNotional, string BuySell)
        {
            return OriginalNotional > 0 ? TradePrice * PositionNotional / OriginalNotional * GetSign(BuySell) : 0;
        }
    }
}