using System.Text;

namespace YLErp.Modules.UnderlyingModule
{
    /// <summary>
    /// 标的数据帮助类
    /// </summary>
    public static class UnderlyingHelper
    {
        /// <summary>
        /// 获取组合标的品种对象
        /// </summary>
        public static Variety GetSyntheticVariety()
        {
            var variety = DataCacheProvider.GetVarietyDataSource().AsQueryable()
                .FirstOrDefault(v => v.VarietyCode == "组合标的");

            if (variety != null)
            {
                return variety;
            }

            lock (DataCacheProvider.GetVarietyDataSource())
            {
                using (var db = DbContextFactory.GetYLDbContext())
                {
                    variety = db.variety.FirstOrDefault(n => n.VarietyCode == "组合标的");

                    if (variety != null)
                    {
                        return variety;
                    }

                    variety = new Variety()
                    {
                        VarietyCode = "组合标的",
                        VarietyName = "组合标的",
                        TradingMarketId = 0,
                        TradeUnit = "1手/份",
                        QuoteUnit = "元（人民币）/份",
                        DeliveryType = "",
                        HasNightMarket = false,
                        ShortName = "组合标的",
                        CommissionType = "固定",
                        CloseTodayCommissionType = "固定",
                        //UnderlyingInstrumentType = "CommodityFutures",
                        VolatilityRate = "",
                        VolatilityAdjust = 0,
                        AssetType = "",
                        OptId = 0,
                        OptName = "系统",
                        OptDate = DateTime.Now,
                    };

                    db.variety.Add(variety);
                    db.SaveChanges();

                    return variety;
                }
            }
        }

        /// <summary>
        /// 获取篮子标的品种对象
        /// </summary>
        public static Variety GetBasketVariety()
        {
            return DataCacheProvider.GetVarietyDataSource().AsQueryable()
                .FirstOrDefault(v => v.VarietyCode == "篮子标的") ??
                new Variety
                {
                    VarietyCode = "篮子标的",
                    VarietyName = "篮子标的",
                    QuoteUnit = "元（人民币）/股",
                    TradeUnit = "100股/手"
                };
        }

        /// <summary>
        /// 获取标的品种代码 例：BU，BU-CU
        /// </summary>
        /// <param name="underlyingCode"></param>
        /// <returns></returns>
        public static string GetUnderlyingVarietyCode(string underlyingCode)
        {
            var ret = "";
            var un = DataCacheProvider.GetUnderlyingDataSource().GetData(underlyingCode);
            if (un != null)
            {
                if (un.UnderlyingType == "组合标的")
                {
                    var synthetic = DataCacheProvider.GetUnderlyingDataSource().GetSyntheticUnderlying(underlyingCode);
                    if (synthetic != null)
                    {
                        var sb = new StringBuilder();
                        var va1 = DataCacheProvider.GetVariety(synthetic.UnderlyingCode1);
                        var va2 = DataCacheProvider.GetVariety(synthetic.UnderlyingCode2);
                        var va3 = DataCacheProvider.GetVariety(synthetic.UnderlyingCode3);
                        var va4 = DataCacheProvider.GetVariety(synthetic.UnderlyingCode4);
                        if (va1 != null)
                        {
                            sb.Append(va1.VarietyCode).Append('-');
                        }
                        if (va2 != null)
                        {
                            sb.Append(va2.VarietyCode).Append('-');
                        }
                        if (va3 != null)
                        {
                            sb.Append(va3.VarietyCode).Append('-');
                        }
                        if (va4 != null)
                        {
                            sb.Append(va4.VarietyCode).Append('-');
                        }
                        ret = sb.ToString().Substring(0, sb.Length - 1);
                    }
                }
                else
                {
                    var va = DataCacheProvider.GetVariety(un.UnderlyingCode);
                    ret = va.VarietyCode;
                }
            }
            return ret;
        }
    }
}