using YLErp.BLL.Calculation;
using YLErp.QdpModule;

namespace YLErp.BLL
{
    public class underlying_main_contractBLL
    {
        public static bool IsListOld = true;

        private static List<underlying_main_contract> Allunderlying_main_contractModel = null;

        public static List<underlying_main_contract> GetAllunderlying_main_contractModel()
        {
            if (IsListOld)
            {
                using (YLContext con = new YLContext())
                {
                    Allunderlying_main_contractModel = con.underlying_main_contract.ToList();
                }
                IsListOld = false;
            }
            return Allunderlying_main_contractModel;
        }

        /// <summary>
        /// 过滤掉不符合规则的标的
        /// 国君规则： 标的到期日前一个月15号必需大于输入的到期日参数maturitydate（到期日为当前时间一个月后的第一个工作日）
        /// </summary>
        public static List<underlying_manager> GetGtja_MaturityUnderlying(List<underlying_manager> tofilterUnderlyings, DateTime maturityDate)
        {
            //调整：
            //原来的逻辑是：underlyingMaturityDate > (maturityDate + 1 month).15th
            //修正后的逻辑是： (underlyingMaturityDate - 1 month).15th > maturityDate                
            var underlyings = new List<underlying_manager>();
            foreach (var x in tofilterUnderlyings)
            {
                if (x.IsVirtualContract() || !x.IsFutures())
                {
                    underlyings.Add(x);
                }
                else
                {
                    var underlyingMaturityDate = DateTime.Now;
                    if (x.MaturityDate == null)
                    {
                        underlyingMaturityDate = QdpHelper.defaultMaturityDateFromContract(x.UnderlyingCode);
                    }
                    else
                    {
                        underlyingMaturityDate = CalculatorHelper.GetContractMaturityDateForQuote(x.MaturityDate.Value, x.UnderlyingCode);
                    }

                    var underlyingCodeArray = x.UnderlyingCode.TakeWhile(c => char.IsLetter(c)).ToArray();

                    var mainUnderlyingCode = new string(underlyingCodeArray) + "00";
                    int.TryParse(x.UnderlyingCode.Substring(x.UnderlyingCode.Length - 2), out var monthInCode);
                    var beforUnderlyingCode = x.UnderlyingCode.Substring(0, x.UnderlyingCode.Length - 2) + (monthInCode - 1).ToString("00");
                    var mainUnderlying = YLErp.Modules.DataCacheProvider.GetUnderlyingDataSource().GetData(mainUnderlyingCode);
                    //是否为“主力合约”，或上一个为“主力合约”
                    var IsMainUnderlying = x.UnderlyingCode == mainUnderlying.TradeCode || beforUnderlyingCode == mainUnderlying.TradeCode;



                    var checkDate = underlyingMaturityDate;
                    //做个月份补丁，如果是1809默认是9月份
                    //没有考虑到1月这种情况，需要测试
                    //if (int.TryParse(x.UnderlyingCode.Substring(x.UnderlyingCode.Length - 2), out int tempData) && tempData > 1 && tempData <= 12 && x.UnderlyingInstrumentType != "Stock")
                    //{
                    //    checkDate = new DateTime(underlyingMaturityDate.Year, tempData, 15);
                    //}
                    if (IsMainUnderlying)
                    {
                        //当前所报的合约的到期日必须小于该合约的到期日-10个交易日
                        checkDate = QdpCalendarHelper.BizDayShift(checkDate, -10);
                        if (checkDate >= maturityDate)
                        {
                            underlyings.Add(x);
                        }
                    }
                    else
                    {
                        checkDate = new DateTime(underlyingMaturityDate.Year, underlyingMaturityDate.Month, 15);
                        checkDate = checkDate.AddMonths(-1);
                        if (PS.Config.Company==Configuration.CompanyEnum.国贸启润)
                        {
                            checkDate = underlyingMaturityDate;
                        }
                        if (checkDate >= maturityDate)
                        {
                            underlyings.Add(x);
                        }
                    }
                }
            }
            return underlyings;
        }

        /// <summary>
        /// 获取给定到期日的平值期权报价列表
        /// 这个函数需要给Web和API使用，因此不使用缓存，直接从数据库查询 
        /// 国君规则： 标的到日期前一个月15号必需大于 maturitydate（到期日为当前时间一个月后的第一个工作日）
        /// </summary>
        /// <param name="maturityDate">报价到期日</param>
        /// <param name="onlyMainContract">是否只包含主力合约</param>
        public static List<underlying_manager> GetDefaultAtMoneyQuoteList(DateTime maturityDate, bool onlyMainContract = true)
        {
            var del = new char[] { ',' };

            using (var db = new YLContext())
            {
                //筛选所有需要报价的品种，并将其对应的合约代码加入codes
                var activeAssetList = GetAllunderlying_main_contractModel().Where(x => x.NeedQuote == 1).OrderBy(n => n.UnderlyingType).ToList();
                string preUnderlyingType = null;
                var unCodeSet = new HashSet<string>();
                foreach (var asset in activeAssetList.ToArray())
                {
                    if (preUnderlyingType == asset.UnderlyingType ||
                        string.IsNullOrWhiteSpace(asset.UnderlyingType) ||
                        string.IsNullOrWhiteSpace(asset.UnderlyingCode))
                    {
                        activeAssetList.Remove(asset);
                    }
                    else
                    {
                        preUnderlyingType = asset.UnderlyingType;
                        var arr = asset.UnderlyingCode.Split(del, StringSplitOptions.RemoveEmptyEntries);
                        foreach (var item in arr)
                        {
                            unCodeSet.Add(item);
                        }
                    }
                }

                //需要获取underlying最新的价格，所以需要从数据库读取
                var underlyings = db.underlying_manager.Where(x => unCodeSet.Contains(x.UnderlyingCode) && x.LaunchState == "1").ToList();
                underlyings = GetGtja_MaturityUnderlying(underlyings, maturityDate);

                if (onlyMainContract)
                {
                    var quoteContracts = new Dictionary<string, underlying_manager>();
                    //每个品种，满足条件的合约中到日期最早的那个
                    foreach (var underlying in underlyings)
                    {
                        if ((!quoteContracts.ContainsKey(underlying.UnderlyingType))
                           || underlying.MaturityDate < quoteContracts[underlying.UnderlyingType].MaturityDate)
                        {
                            quoteContracts[underlying.UnderlyingType] = underlying;
                        }
                    }
                    underlyings = quoteContracts.Values.ToList();
                }

                var dic = activeAssetList.ToDictionary(n => n.UnderlyingType);
                foreach (var un in underlyings)
                {
                    if (dic.TryGetValue(un.UnderlyingType, out var asset))
                    {
                        un.order = asset.OrderId;
                    }
                }

                underlyings.Sort((x, y) => (x.order ?? 0) - (y.order ?? 0));
                return underlyings;
            }
        }
    }
}