using YLErp.Abstract;
using YLErp.Modules.CalculationModule.Abstract;
using YLErp.Modules.DataCacheModule;
using YLErp.Modules.DataProviderModule;
using YLErp.QdpModule;

namespace YLErp.Modules.TradeRiskCalcModule.TaskRunner
{
    /// <summary>
    /// 实时风险计算数据初始化
    /// </summary>
    public class DataInitializer : IVolatilityDataProvider
    {
        public DateTime ValueDate { get; private set; }

        public DateTime PreSettleDate { get; private set; }

        public TradeDataSource TradeDataSource { get; private set; }

        public TradeRiskCalcDataProvider DataProvider { get; private set; }

        UnderlyingVolProvider _UnderlyingVolProvider;
        UnderlyingVolProvider _UnderlyingVolProviderPre;
        OtcPositionVolProvider _OtcPositionVolProvider;
        OtcHedgingVolProvider _OtcHedgingVolProvider;
        OtcEodOverrideVolProvider _OtcEodOverrideVolProvider;
        ExOptionSavedVolProvider _ExOptionSavedVolProvider;
        ManualRiskProvider _EodManualRiskProvider;
        ManualRiskProvider _EodManualRiskProviderHedge;

        IDataTraceSink _dataTraceSink;

        readonly IYcLogger _logger;

        DateTime? _eodOptTime;

        int _initFlag;

        public DataInitializer(IYcLogger logger = null)
        {
            _logger = logger ?? LogFactory.GetLogger("实时风险计算");
        }

        ~DataInitializer()
        {
            DataCacheManager.UnRegisterDataTraceSink(_dataTraceSink);
        }

        /// <summary>
        /// 特定计算日期(用于测试时可计算历史日期)
        /// </summary>
        public DateTime? SpecialValueDate { get; set; }

        /// <summary>
        /// 是否已经准备好
        /// </summary>
        public bool IsReady => _initFlag == 2;

        /// <summary>
        /// 初始化(2020-02-20:因为收盘版本改进增加了参数volType用于取最后收盘日期)
        /// </summary>
        public void Init(out bool blReset)
        {
            _logger?.Debug("初始化计算数据...");

            blReset = false;

            //-----------------------------------
            // 确定实时风险估值日
            //-----------------------------------

            var now = SpecialValueDate ?? DateTime.Now;
            if (now.TimeOfDay.Ticks > StarTimeTicks)
            {
                now = now.AddDays(1);
            }
            var valueDate = QdpCalendarHelper.GetNonHoliday(now.Date);
            if (ValueDate != valueDate)
            {
                _initFlag = 0;
                ValueDate = valueDate;
            }

            _logger?.Debug("计算日期:" + valueDate);

            //-----------------------------------
            // 检查上个结算日收盘是否发生了变化
            // 如果发生了变化,实时风险计算需要重置
            //-----------------------------------

            var preDate = DateTime.MinValue;

            using (var db = DbContextFactory.GetYLDbContext())
            {
                var lastData = db.eodStatus.Where(t => t.Status == "已收盘" && t.ValueDate < valueDate)
                    .OrderByDescending(t => t.ValueDate).Select(n => new { n.ValueDate, n.OptDate }).FirstOrDefault();

                if (lastData != null)
                {
                    preDate = lastData.ValueDate.Date;
                }
                else
                {
                    preDate = QdpCalendarHelper.BizDayShift(valueDate, offset: -1);
                }

                if (PreSettleDate != preDate)
                {
                    _initFlag = 0;
                    PreSettleDate = preDate;
                }

                if (lastData?.OptDate != _eodOptTime)
                {
                    _initFlag = 0;
                    _eodOptTime = lastData?.OptDate;
                }
            }

            _logger?.Debug("上一个结算日:" + preDate);

            //-----------------------------------
            //更新数据
            //-----------------------------------

            if (_initFlag == 0)
            {
                _logger?.Info($"重置数据[valueDate:{ValueDate}][LastSettlementDate:{PreSettleDate}]");

                DataCacheManager.UnRegisterDataTraceSink(_dataTraceSink);

                //必须重新初始化防止正在进行的计算混淆数据环境
                DataProvider = new TradeRiskCalcDataProvider();
                TradeDataSource = new TradeDataSource(valueDate, preDate);

                var updaters = new List<IDataUpdater>(TradeDataSource.GetDataUpdaters());

                updaters.AddRange(new IDataUpdater[] {
                    AutocallObservationDataSource.Default,
                    _UnderlyingVolProvider = new UnderlyingVolProvider(valueDate),
                    _UnderlyingVolProviderPre = new UnderlyingVolProvider(preDate),
                    _OtcPositionVolProvider = new OtcPositionVolProvider(valueDate),
                    _OtcHedgingVolProvider = new OtcHedgingVolProvider(valueDate),
                    _OtcEodOverrideVolProvider = new OtcEodOverrideVolProvider(valueDate),
                    _ExOptionSavedVolProvider = new ExOptionSavedVolProvider(valueDate),
                    _EodManualRiskProvider = new ManualRiskProvider(valueDate, "持仓"),
                    _EodManualRiskProviderHedge = new ManualRiskProvider(valueDate, "对冲")
                });

                _dataTraceSink = new DataTraceSinkGroup(2, updaters.ToArray());
                DataCacheManager.RegisterDataTraceSink(_dataTraceSink);
                _dataTraceSink.UpdateCache();

                _initFlag = 1;

                blReset = true;
            }

            DataProvider.InitData(preDate, this);

            _initFlag = 2;

            _logger?.Debug("初始化计算数据完成");
        }

        /// <summary>
        /// 
        /// </summary>
        internal InnerRunTaskData GetRunTaskData()
        {
            return new InnerRunTaskData
            {
                IsReady = IsReady,
                DataProvider = DataProvider,
                PreSettleDate = PreSettleDate,
                TradeDataSource = TradeDataSource,
                ValueDate = ValueDate,
                ManualRiskProvider = _EodManualRiskProvider,
                ManualRiskProviderHedge = _EodManualRiskProviderHedge
            };
        }

        #region----IVolatilityDataProvider----

        /// <summary>
        /// 场内期权保存的波动率
        /// </summary>
        public double? GetExOptionSavedVol(string optionCode, DateTime valueDate)
        {
            return _ExOptionSavedVolProvider.GetSavedVol(optionCode, valueDate);
        }

        /// <summary>
        /// 场外期权对冲波动率
        /// </summary>
        public double? GetOtcHedgingVol(int tradeId, DateTime valueDate)
        {
            return _OtcHedgingVolProvider.GetVol(tradeId, valueDate);
        }

        /// <summary>
        /// 标的波动率
        /// </summary>
        public IVolatility GetUnderlyingVol(DateTime valueDate, string voltype, string contractCode, string userGroup)
        {
            return (valueDate == _UnderlyingVolProvider.ValueDate ? _UnderlyingVolProvider : _UnderlyingVolProviderPre)
                .GetVolatility(voltype, contractCode, userGroup);
        }

        /// <summary>
        /// 场外期权结算波动率
        /// </summary>
        public double? GetOtcEodOverrideVol(int tradeId, DateTime valueDate)
        {
            return _OtcEodOverrideVolProvider.GetVol(tradeId, valueDate);
        }

        /// <summary>
        /// 场外期权交易波动率
        /// </summary>
        public IOtcTradeVolatility GetOtcPositionVol(int tradeId, DateTime valueDate)
        {
            return _OtcPositionVolProvider.GetVol(tradeId, valueDate);
        }

        #endregion

        public static readonly long StarTimeTicks;

        static DataInitializer()
        {
            StarTimeTicks = new TimeSpan(20, 35, 0).Ticks;
        }
    }
}