using System.Collections.Generic;
using System.Linq;
using BaseOUDAL;
using DocumentFormat.OpenXml.Bibliography;
using NPOI.POIFS.NIO;
using YLErp.Helpers;

namespace YLErp.Modules.EodModule
{
    /// <summary>
    /// 日终价格服务
    /// </summary>
    public class EodPriceService : YLBaseService
    {
        public EodPriceService(OptUserInfo userInfo) : base(userInfo)
        {

        }

        public SearchListResult<EodUnderlyingPriceDto> SearchUnderlyingList(EodCommodityFuturePriceReq req)
        {
            var valueDtStart = req.ValueDateStart.Year > 2000 ? req.ValueDateStart : DateTime.Today.AddYears(-1);
            var valueDtEnd = req.ValueDateEnd.Year > 2000 ? req.ValueDateEnd.AddDays(1) : DateTime.Today.AddYears(1);

            var predicatUn = PredicateBuilder.Create<underlying_manager>(d => d.LaunchState == "1");
            var predicatEoc = PredicateBuilder.Create<eod_commodity_future_price>(source => source.ValueDate >= valueDtStart && source.ValueDate < valueDtEnd);
            var predicatEot = PredicateBuilder.Create<eod_stock_price>(source => source.ValueDate >= valueDtStart && source.ValueDate < valueDtEnd);
            var predicatEob = PredicateBuilder.Create<ChinaBondValuation>(source => source.valuation_date >= valueDtStart && source.valuation_date < valueDtEnd);

            if (!string.IsNullOrEmpty(req.DataSource))
            {
                predicatEoc = predicatEoc.And(d => d.DataSource.Contains(req.DataSource));
                predicatEot = predicatEot.And(d => d.DataSource.Contains(req.DataSource));
                // 债券来源恒为"中债估值"（聚源仅转发，无人手工维护），
                // 只有按"中债估值"筛选时才命中债券；人工/系统筛选不命中债券。
                if (req.DataSource != EodPriceBase.中债估值)
                {
                    predicatEob = predicatEob.And(d => false);
                }
            }

            if (!string.IsNullOrEmpty(req.MarketName))
            {
                predicatUn = predicatUn.And(d => d.MarketName == req.MarketName);
            }

            if (!string.IsNullOrEmpty(req.UnderlyingCode))
            {
                predicatUn = predicatUn.And(d => d.UnderlyingCode.Contains(req.UnderlyingCode));
            }

            var queryUn = DbContext.underlying_manager.Where(predicatUn).Select(n => new { n.id, n.LaunchState, n.MarketName, n.UnderlyingState, n.UnderlyingType, n.UnderlyingCode, n.UnderlyingName,n.UnderlyingInstrumentType });
            var query1 = from un in queryUn
                         join source in DbContext.eod_commodity_future_price.Where(predicatEoc) on un.id equals source.UnderlyingId
                         select new EodUnderlyingPriceDto
                         {
                             IsBond=false,
                             id = source.id,
                             DataSource = source.DataSource,
                             LaunchState = un.LaunchState,
                             MarketName = un.MarketName,
                             UnderlyingId = un.id,
                             UnderlyingCode = un.UnderlyingCode,
                             UnderlyingName = un.UnderlyingName,
                             UnderlyingState = un.UnderlyingState,
                             UnderlyingType = un.UnderlyingType,
                             UnderlyingInstrumentType = "CommodityFutures",
                             RealInstrumentType = un.UnderlyingInstrumentType,
                             ValueDate = source.ValueDate,
                             SettlePrice = source.SettlePrice,
                             ClosePrice = source.ClosePrice,
                             UpdateTime = source.OptDate,
                             ReferencePrice = source.ReferencePrice,
                             SourceTime = source.SourceTime,
                             DeciClosePrice=0,
                             DeciSettlePrice = 0,
                             DeciReferencePrice=0
                         };

            var query2 = from un in queryUn
                         join stockClose in DbContext.eod_stock_price.Where(predicatEot) on un.UnderlyingCode equals stockClose.UnderlyingCode
                         select new EodUnderlyingPriceDto
                         {
                             IsBond = false,
                             id = stockClose.id,
                             DataSource = stockClose.DataSource,
                             LaunchState = un.LaunchState,
                             MarketName = un.MarketName,
                             UnderlyingId = un.id,
                             UnderlyingCode = un.UnderlyingCode,
                             UnderlyingName = un.UnderlyingName,
                             UnderlyingState = un.UnderlyingState,
                             UnderlyingType = un.UnderlyingType,
                             UnderlyingInstrumentType = "Stock",
                             RealInstrumentType = un.UnderlyingInstrumentType,
                             ValueDate = stockClose.ValueDate,
                             SettlePrice = stockClose.ClosePrice,
                             ClosePrice = stockClose.ClosePrice,
                             UpdateTime = stockClose.OptDate,
                             ReferencePrice = stockClose.ReferencePrice,
                             SourceTime = stockClose.SourceTime,
                             DeciClosePrice = 0,
                             DeciSettlePrice = 0,
                             DeciReferencePrice = 0
                         };
            var query3 = from un in queryUn
                         join bondClose in DbContext.china_bond_valuation.Where(predicatEob) on un.UnderlyingCode equals bondClose.bond_id
                         select new EodUnderlyingPriceDto
                         {
                             IsBond = true,
                             id = bondClose.id,
                             UpdateUser = bondClose.update_user,
                             // 债券 DataSource 在后处理统一置为固定值"中债估值"（见下方 foreach）。
                             LaunchState = un.LaunchState,
                             MarketName = un.MarketName,
                             UnderlyingId = un.id,
                             UnderlyingCode = un.UnderlyingCode,
                             UnderlyingName = un.UnderlyingName,
                             UnderlyingState = un.UnderlyingState,
                             UnderlyingType = un.UnderlyingType,
                             UnderlyingInstrumentType = un.UnderlyingInstrumentType,
                             RealInstrumentType = un.UnderlyingInstrumentType,
                             ValueDate = bondClose.valuation_date,
                             SettlePrice=0,
                             DeciSettlePrice =bondClose.net_price, 
                             ClosePrice=0,
                             DeciClosePrice = bondClose.dirty_price_close,
                             UpdateTime = bondClose.update_time,
                             ReferencePrice=0,
                             DeciReferencePrice = bondClose.yield,
                             SourceTime=""
                         };
            var unionQuery = query1.Concat(query2);
            var finalQuery = unionQuery.Concat(query3);
            if (string.IsNullOrEmpty(req.sidx))
            {
                req.sidx = "ValueDate";
                req.sord = "desc";
            }
            var result = finalQuery.ToSearchList(req);

            // 解析手工改过估值的债券操作人姓名：update_user 非空 = 被人手工改过（聚源同步为 NULL）。
            // 此时来源列显示改这个人名，而非"中债估值"，以便溯源到具体操作人。
            var manualBondRows = result.rows.Where(r => r.IsBond && r.UpdateUser.HasValue).ToList();
            Dictionary<long, string> operatorNameMap = null;
            if (manualBondRows.Any())
            {
                var operatorIds = manualBondRows.Select(r => r.UpdateUser.Value).Distinct().ToList();
                using (var erpCtx = DbContextFactory.GetErpBaseContext())
                {
                    operatorNameMap = erpCtx.SystemUsers.AsNoTracking()
                        .Where(u => operatorIds.Contains((long)u.Id))
                        .ToDictionary(u => (long)u.Id, u => u.Name);
                }
            }

            foreach (var item in result.rows)
            {
                if (item.IsBond)
                {
                    // 人工改动过则显示改这个人名，否则显示"中债估值"。
                    item.DataSource = ResolveBondDisplaySource(item.UpdateUser, operatorNameMap);
                    item.SourceTime = item.UpdateTime.HasValue? item.UpdateTime.Value.ToString("yyyy-MM-dd HH:mm:ss"):"";
                    item.SettlePrice=Convert.ToDouble(item.DeciSettlePrice);
                    item.ClosePrice = Convert.ToDouble(item.DeciClosePrice);
                    item.ReferencePrice = Convert.ToDouble(item.DeciReferencePrice);
                }
            }
            return result;
        }

        /// <summary>
        /// 保存日终期货价格
        /// </summary>
        public eod_commodity_future_price SaveEodFuturePrice(eod_commodity_future_price req)
        {
            if (req is null)
            {
                throw new ArgumentNullException(nameof(req));
            }

            if (DbContext.eod_commodity_future_price.Any(n => n.id != req.id && n.UnderlyingCode == req.UnderlyingCode && n.ValueDate == req.ValueDate))
            {
                throw new ServiceException("已存在相同估值日期，相同合约的数据");
            }

            eod_commodity_future_price dbmodel;

            if (req.id == 0)
            {
                DbContext.eod_commodity_future_price.Add(dbmodel = req);
            }
            else
            {
                dbmodel = DbContext.eod_commodity_future_price.Find(req.id);
                if (dbmodel == null)
                {
                    throw new ServiceException("数据不存在");
                }
                UpdateChanges(dbmodel, req);
            }

            SetDBModelOpt(dbmodel);

            dbmodel.DataSource = EodPriceBase.人工;

            DbContext.SaveChanges();

            return dbmodel;
        }

        public ChinaBondValuation SaveBondPrice(ChinaBondValuation req)
        {
            if (req is null)
            {
                throw new ArgumentNullException(nameof(req));
            }
            ChinaBondValuation dbmodel;

            if (req.id == 0)
            {
                DbContext.china_bond_valuation.Add(dbmodel = req);
            }
            else
            {
                dbmodel = DbContext.china_bond_valuation.Find(req.id);
                if (dbmodel == null)
                {
                    throw new ServiceException("数据不存在");
                }
                UpdateChanges(dbmodel, req);
            }
            // 记录手工编辑人：写入登录用户ID到已有列(create_user/update_user)，
            // 不新增字段。聚源同步路径(SettlementPriceImportService)不写这两列，故 NULL 即"自动同步"。
            StampBondOperator(dbmodel, UserId, req.id == 0);
            dbmodel.update_time = DateTime.Now;
            DbContext.SaveChanges();

            return dbmodel;
        }

        /// <summary>
        /// 标记债券估值(china_bond_valuation)的操作人。
        /// 该表已有 create_user/update_user 两列(bigint)，但聚源同步路径不写入，
        /// 因此：NULL = 聚源/中债自动同步；有值 = 被人手工编辑(记录登录用户ID)。
        /// 抽出为纯静态函数，供 SaveBondPrice 与单元测试共用。
        /// </summary>
        /// <param name="model">债券估值实体</param>
        /// <param name="userId">当前登录用户ID</param>
        /// <param name="isNew">是否为新增(true 时同时写 create_user)</param>
        public static void StampBondOperator(ChinaBondValuation model, int userId, bool isNew)
        {
            model.update_user = userId;
            if (isNew)
            {
                model.create_user = userId;
            }
        }

        /// <summary>
        /// 债券来源列该显示什么：
        ///   - update_user 有值（被人手工改过）且能解析到操作人姓名 → 显示改这个人名，便于溯源；
        ///   - 否则（聚源/中债自动同步，update_user 为 NULL）→ 固定显示"中债估值"。
        /// 抽为纯静态函数，与解析姓名所需的 sys_user 查询解耦，便于无库单元测试。
        /// </summary>
        /// <param name="updateUser">china_bond_valuation.update_user（NULL = 自动同步）</param>
        /// <param name="operatorNameMap">update_user(ID) → 操作人姓名 的字典（由调用方按需从 sys_user 解析）</param>
        public static string ResolveBondDisplaySource(long? updateUser, IDictionary<long, string> operatorNameMap)
        {
            if (updateUser.HasValue && operatorNameMap != null
                && operatorNameMap.TryGetValue(updateUser.Value, out var opName) && !string.IsNullOrEmpty(opName))
            {
                return opName;
            }
            return EodPriceBase.中债估值;
        }
        /// <summary>
        /// 保存日终股票价格
        /// </summary>
        public eod_stock_price SaveEodStockPrice(eod_stock_price req)
        {
            if (req is null)
            {
                throw new ArgumentNullException(nameof(req));
            }

            if (DbContext.eod_stock_price.Any(n => n.id != req.id && n.UnderlyingCode == req.UnderlyingCode && n.ValueDate == req.ValueDate))
            {
                throw new ServiceException("已存在相同估值日期，相同合约的数据");
            }

            eod_stock_price dbmodel;

            if (req.id == 0)
            {
                DbContext.eod_stock_price.Add(dbmodel = req);
            }
            else
            {
                dbmodel = DbContext.eod_stock_price.Find(req.id);

                if (dbmodel == null)
                {
                    throw new ServiceException("数据不存在");
                }

                UpdateChanges(dbmodel, req);
            }

            SetDBModelOpt(dbmodel);

            dbmodel.DataSource = EodPriceBase.人工;

            DbContext.SaveChanges();

            return dbmodel;
        }
    }

    /// <summary>
    /// 
    /// </summary>
    public class EodCommodityFuturePriceReq : BaseSearchReq
    {
        /// <summary>
        /// 数据来源
        /// </summary>
        public string DataSource { get; set; }

        public string MarketName { get; set; }

        public string LaunchState { get; set; }

        /// <summary>
        /// 标的代码
        /// </summary> 
        public string UnderlyingCode { get; set; }

        public DateTime ValueDateStart { get; set; }

        public DateTime ValueDateEnd { get; set; }
    }

    public class EodUnderlyingPriceDto
    {
        public string EncryptId
        {
            get
            {
                return DataProtectHelper.Encrypt(id.ToString());
            }
        }

        public long id { get; set; }

        public DateTime ValueDate { get; set; }

        public double SettlePrice { get; set; }

        public double ClosePrice { get; set; }

        public double? ReferencePrice { get; set; }

        public string DataSource { get; set; }

        public string UnderlyingType { get; set; }

        public string UnderlyingInstrumentType { get; set; }

        /// <summary>
        /// 真实标的种类（取自 underlying_manager），仅供列表"标的种类"列显示。
        /// UnderlyingInstrumentType 仍作为"存储表路由键"使用，二者解耦，避免改动历史路由逻辑。
        /// </summary>
        public string RealInstrumentType { get; set; }

        public string UnderlyingInstrumentTypeCn => ConsGlobal.InstrumentType.GetDesc(RealInstrumentType ?? UnderlyingInstrumentType);

        public string UnderlyingState { get; set; }

        public string MarketName { get; set; }

        public string LaunchState { get; set; }

        public int UnderlyingId { get; set; }

        public string UnderlyingCode { get; set; }

        public string UnderlyingName { get; set; }

        public DateTime? UpdateTime { get; set; }

        public string SourceTime { get; set; }

        public decimal? DeciSettlePrice { get; set; }
        public decimal? DeciClosePrice { get; set; }
        public decimal? DeciReferencePrice { get; set; }

        public bool IsBond { get; set; }

        /// <summary>
        /// 手工改过估值时的操作人ID（china_bond_valuation.update_user）。
        /// NULL = 聚源/中债自动同步（无人手工维护）；有值 = 被人手工改过、可溯源。
        /// 仅债券行可能非空，用于列表来源列显示改这个人名而非"中债估值"。
        /// </summary>
        public long? UpdateUser { get; set; }
    }
}