using BaseOUDAL;
using YLErp.BLL;
using YLErp.DBModels.Enums;
using YLErp.DBModels.Helpers;
using YLErp.QdpModule;

namespace YLErp.Modules.ExchangeTradeModule
{
    /// <summary>
    /// 对冲交易同步API服务
    /// </summary>
    public class ExchangeTradeSyncApiService : ExchangeTradeSaveServiceBase
    {
        public ExchangeTradeSyncApiService(YLBaseService baseService) : base(baseService)
        {

        }

        public ExchangeTradeSyncApiService(OptUserInfo userInfo) : base(userInfo)
        {

        }

        public int Save(ExchangeTradeSaveApiReq req, string tradeSource)
        {
            if (req.TradeDate == DateTime.MinValue)
            {
                throw new ServiceException("交易日期 必须填写");
            }

            if (!req.IsHistory && req.TradeDate < valuedateBLL.ValueDate)
            {
                throw new ServiceException("交易日期 不能小于系统日期:" + valuedateBLL.ValueDate.ToString("yyyy-MM-dd"));
            }

            if (string.IsNullOrWhiteSpace(req.UnderlyingCode))
            {
                throw new ServiceException("交易产品代码 必须填写");
            }

            if (string.IsNullOrWhiteSpace(req.BuySell))
            {
                throw new ServiceException("交易方向 必须填写");
            }

            if (string.IsNullOrWhiteSpace(req.ExchangeAccountCode))
            {
                throw new ServiceException("交易账户代码 必须填写");
            }

            switch (req.TradeType)
            {
                case "股票":
                case "商品现货":
                case "场内期权":
                case "利率债":
                case "信用债":
                case "其它债券":
                    break;
                case "商品期货":
                    if (req.UnderlyingCode.Length > 8)
                    {
                        req.TradeType = "场内期权";
                    }
                    break;
                default:
                    throw new ServiceException("交易类型未能识别:" + req.TradeType);
            }

            //20220415:金仕达接口给的商品期货数据，如果是来源于场内期权行权产生的，则会和场内期权交易编号一致
            ExchangeTrade dbTrade = null;

            var canUpdate = false;

            //两个交易日内交易编号相同的在数据库存在数据，就忽略不做处理；不存在，就插入一条交易日为上一日的交易。
            if (req.TradeNumber.EndsWith("_dzrh_"))
            {
                var lastTradeDate = QdpCalendarHelper.GetNonHolidayDefore(req.TradeDate.AddDays(-1));
                if (DbContext.ExchangeTrade.Any(x => (x.TradeDate == req.TradeDate || x.TradeDate == lastTradeDate) && x.TradeNumber == req.TradeNumber))
                {
                    return 0;
                }
                else
                {
                    req.TradeDate = lastTradeDate;
                }
            }
            else
            {
                dbTrade = DbContext.ExchangeTrade.FirstOrDefault(x => x.TradeDate == req.TradeDate && x.TradeType == req.TradeType && x.TradeNumber == req.TradeNumber);
                canUpdate = dbTrade != null
                    //&& req.TradeType == dbTrade.TradeType
                    && req.BuySell == dbTrade.TradeSide
                    && req.ExchangeAccountCode.Equals(dbTrade.ExchangeAccountCode, StringComparison.OrdinalIgnoreCase)
                    && req.UnderlyingCode.Equals(dbTrade.TradeType == "场内期权" ? dbTrade.OptionCode : dbTrade.UnderlyingCode, StringComparison.OrdinalIgnoreCase);
            }

            var reqTrade = PrepareReqTrad(req, tradeSource);

            SaveExchangeTradePosition(reqTrade, canUpdate ? dbTrade : null);

            if (canUpdate)
            {
                dbTrade.UnderlyingCode = reqTrade.UnderlyingCode;
                dbTrade.TradeSinglePrice = reqTrade.TradeSinglePrice;

                dbTrade.Notional = reqTrade.Notional;
                dbTrade.TradeAmount = reqTrade.TradeAmount;
                dbTrade.TradeLots = reqTrade.TradeLots;

                dbTrade.TraderId = reqTrade.TraderId;
                dbTrade.TraderName = reqTrade.TraderName;

                dbTrade.UnderlyingId = reqTrade.UnderlyingId;
                dbTrade.MaturityDate = reqTrade.MaturityDate;

                dbTrade.OptionStrike = reqTrade.OptionStrike;
                dbTrade.OptionType = reqTrade.OptionType;
                dbTrade.ExerciseMode = reqTrade.ExerciseMode;

                dbTrade.AssetBookId = reqTrade.AssetBookId;
                dbTrade.ExchangeAccountId = reqTrade.ExchangeAccountId;

                dbTrade.InstrumentType = reqTrade.InstrumentType;

                dbTrade.OptDate = DateTime.Now;
            }
            else
            {
                DbContext.ExchangeTrade.Add(reqTrade);
            }

            return DbContext.SaveChanges();
        }

        //将req转换交易对象
        private ExchangeTrade PrepareReqTrad(ExchangeTradeSaveApiReq req, string tradeSource = "下单同步")
        {
            var td = new ExchangeTrade
            {
                IsValid = true,

                TradeType = req.TradeType,
                TradeDate = req.TradeDate,
                TradeNumber = req.TradeNumber,
                TradeSide = req.BuySell,
                TradeSinglePrice = req.TradePrice,
                UnderlyingCode = req.UnderlyingCode,
                ExchangeAccountCode = req.ExchangeAccountCode,

                Commission = 0,
                CommissionType = CommissionType.系统计算,

                OptId = 0,
                OptDate = DateTime.Now,
                OptName = UserName,
                CreateTime = DateTime.Now,
                TradeSource = tradeSource,

                Notional = 0,
                TradeAmount = 0,
                TradeLots = 0,

                TraderId = 0,
                TraderName = UserName,

                UnderlyingId = 0,
                MaturityDate = null,

                OptionCode = null,
                OptionStrike = null,
                OptionType = null,
                ExerciseMode = null,

                AssetBookId = 0,
                ExchangeAccountId = 0,

                InstrumentType = null,
                Comments = null,
            };

            var contractSize = 0d;

            if (td.TradeType == "场内期权")
            {
                SetTradeOptionInfo(td, td.UnderlyingCode, out var option, false);

                contractSize = option.ContractSize;
            }

            //标的信息
            var um = DbContext.underlying_manager.Where(un => un.UnderlyingCode == td.UnderlyingCode)
                      .Select(n => new
                      {
                          n.id,
                          n.UnderlyingType,
                          n.MaturityDate,
                          n.UnderlyingTypeId,
                          n.UnderlyingInstrumentType,
                          n.ContractSize
                      }).FirstOrDefault();

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

            td.UnderlyingId = um.id;
            td.InstrumentType = um.UnderlyingInstrumentType;

            if (td.TradeType != "场内期权")
            {
                td.MaturityDate = um.MaturityDate;
            }

            //交易数量
            if (td.TradeType == "股票")
            {
                td.TradeLots = req.Lots / 100;
                td.Notional = td.TradeAmount = req.Lots;
            }
            else
            {
                if (contractSize < 1)
                {
                    contractSize = um.ContractSize;
                }

                var variety = DbContext.variety.Where(n => n.id == um.UnderlyingTypeId).FirstOrDefault();

                if (variety == null)
                {
                    throw new ServiceException($"未找到{td.UnderlyingCode}的品种信息");
                }

                var CountRatio = VarietyHelper.GetCountRatio(variety.QuoteUnit);

                if (contractSize > 1)
                {
                    td.TradeLots = req.Lots;
                    td.Notional = req.Lots * contractSize;
                    td.TradeAmount = td.Notional / variety.CountRatio;
                }
                else
                {
                    td.TradeLots = req.Lots;
                    td.Notional = req.Lots * (variety.TradeUnitValue ?? 1);
                    td.TradeAmount = td.Notional / variety.CountRatio;
                }
            }

            //簿记等信息
            PrepareBook(td, um.UnderlyingTypeId);

            if (req.Commission.HasValue)
            {
                td.Commission = req.Commission.Value;
                td.CommissionType = CommissionType.手动录入;
            }

            return td;
        }

        //为trade准备对冲账户/簿记/交易员信息
        private void PrepareBook(ExchangeTrade td, int varietyId)
        {
            var query = from a in DbContext.exchange_account
                        join b in DbContext.assetunit on a.DefaultBookId equals b.id into bs
                        from b in bs.DefaultIfEmpty()
                        where a.AccountCode == td.ExchangeAccountCode && a.Status == 1
                        select new
                        {
                            AccountId = a.id,
                            a.AccountCode,
                            a.VarietyIds,
                            a.TraderIds,
                            BookId = b != null ? b.id : 0,
                            BookName = b != null ? b.Name : "",
                            a.Description
                        };

            var accbooks = query.ToList();

            if (accbooks.Count == 0)
            {
                throw new ServiceException($"对冲账户'{td.ExchangeAccountCode}'在系统中不存在");
            }

            var accbook = accbooks[0];
            var commaVarietyId = $",{varietyId},";

            if (accbooks.Count == 1)
            {
                if (varietyId > 0 && !(string.IsNullOrWhiteSpace(accbook.VarietyIds) || string.Concat(",", accbook.VarietyIds.Trim(), ",").Contains(commaVarietyId)))
                {
                    throw new ServiceException($"对冲账户'{td.ExchangeAccountCode}'配置品种不包含此交易的品种");
                }
            }
            else if (varietyId > 0)
            {
                accbook = accbooks.FirstOrDefault(n => string.Concat(",", n.VarietyIds.Trim(), ",").Contains(commaVarietyId))
                    ?? accbooks.FirstOrDefault(n => string.IsNullOrWhiteSpace(n.VarietyIds));

                if (accbook == null)
                {
                    throw new ServiceException($"对冲账户'{td.ExchangeAccountCode}'配置品种不包含此交易的品种");
                }
            }

            //对冲账户
            td.ExchangeAccountId = accbook.AccountId;
            td.ExchangeAccountCode = accbook.AccountCode;

            //簿记帐户
            if (accbook.BookId < 1)
            {
                throw new ServiceException($"对冲账户'{td.ExchangeAccountCode}'没有找到簿记账户");
            }

            td.AssetBookId = accbook.BookId;

            //交易员信息
            var traderId = td.TraderId;
            var trader = traderId > 0 ? UserBLL.GetById(traderId) : null;
            if (trader == null)
            {
                traderId = DataConvert.ConvertCommaValuesToInt32Array(accbook.TraderIds).FirstOrDefault();
                if (traderId > 0)
                {
                    trader = UserBLL.GetById(traderId);
                }
            }
            td.TraderId = trader?.Id ?? UserId;
            td.TraderName = (trader == null && !string.IsNullOrWhiteSpace(accbook?.Description)) ? accbook.Description.Trim() : trader?.Name ?? UserName ?? "系统";
        }
    }
}