using BaseOUDAL;
using DocumentFormat.OpenXml.Bibliography;
using ExcelDataReader.Log;
using YLErp.DBModels;
using YLErp.Helpers;

namespace YLErp.Modules.EodModule
{
    /// <summary>
    /// 债券期间付息服务
    /// </summary>
    public class BondPaymentService : YLBaseService
    {
        private static IYcLogger Log = LogFactory.GetLogger(nameof(BondPaymentService));
        public BondPaymentService(OptUserInfo userInfo) : base(userInfo)
        {

        }

        public SearchListResult<BondPaymentDto> SearchList(BondPaymentReq 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<BondPayment>(source => source.payment_date >= valueDtStart && source.payment_date < valueDtEnd);

            if (!string.IsNullOrEmpty(req.DataSource))
            {
                predicatEoc = predicatEoc.And(d => d.channel_source.Contains(req.DataSource));
            }
            if (!string.IsNullOrEmpty(req.MarketName))
            {
                predicatUn = predicatUn.And(d => d.MarketName == req.MarketName);
            }
            if (!string.IsNullOrEmpty(req.UnderlyingCode))
            {
                predicatEoc = predicatEoc.And(d => d.underlyingCode.Contains(req.UnderlyingCode));
            }
            if (string.IsNullOrEmpty(req.sidx))
            {
                req.sidx = "payment_date";
                req.sord = "desc";
            }
            var queryUn = DbContext.underlying_manager.Where(predicatUn).Select(n => new { n.id, n.MarketName, n.UnderlyingCode, n.UnderlyingName, n.UnderlyingInstrumentType, n.InnerCode });
            var query = from un in queryUn
                        join source in DbContext.bondPayment.Where(predicatEoc) on un.UnderlyingCode equals source.underlyingCode
                        select new BondPaymentDto
                        {
                            id = source.id,
                            channel_source = source.channel_source,
                            MarketName = un.MarketName,
                            security_id = un.UnderlyingCode,
                            symbol = un.UnderlyingName,
                            coupon_rate = source.coupon_rate,
                            payment_date = source.payment_date,
                            payment_interest = source.payment_interest,
                            payment_parvalue = source.payment_parvalue,
                            create_time = source.create_time,
                            update_time = source.update_time
                        };
            var result = query.ToSearchList(req);
            return result;
        }

        public BondPayment SaveBondPayment(BondPayment req)
        {
            if (req is null)
            {
                throw new ArgumentNullException(nameof(req));
            }
            BondPayment dbmodel;

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

            return dbmodel;
        }
        /// <summary>
        /// 获取某债券的期间付息情况集合
        /// </summary>
        /// <param name="underylingCode"></param>
        /// <param name="startDate"></param>
        /// <param name="endDate"></param>
        /// <returns></returns>
        public List<BondPayment> GetBondPayments(string underlyingCode, DateTime startDate, DateTime endDate)
        {
            // GLMS-20260105-0006：票息归属按债权登记日(reg_date)判定，而非支付日(pay_date_PL/pay_date_act)。
            // 登记日当天 EOD 即应计提；原按支付日口径会让"登记日≠支付日"的债券漏计（二者恰差一工作日时缺陷被掩盖）。
            var result = QueryBondPayments(underlyingCode)
                .Where(x => x.reg_date > startDate && x.reg_date <= endDate)
                .AsNoTracking().ToList();
            Log.Info($"[分红-登记日口径] GetBondPayments underlyingCode={underlyingCode} 区间=({startDate:yyyy-MM-dd},{endDate:yyyy-MM-dd}] 按reg_date过滤, 命中 {result.Count} 条: " +
                     string.Join(",", result.Select(r => r.reg_date?.ToString("yyyy-MM-dd"))));

            // 让 Copy/Update EOD 始终只依赖 BondPaymentService，而不必在收盘链路直接累加 ex_dividend_info。
            // Stock/Fund 公司行为直接从 ex_dividend_info 读取，内部仍按“每 10 份派现金额”保存 GiveCashAmount 原值，
            // 最后的 /10 只应用于这类内存补充记录；bond_payment_info 原生记录仍按每 100 份处理。
            var corporatePayments = (from dividend in DbContext.ex_dividend_info.AsNoTracking()
                                     join underlying in DbContext.underlying_manager.AsNoTracking()
                                         on dividend.UnderlyingCode equals underlying.UnderlyingCode
                                     where dividend.ValidStatus
                                         && dividend.EffectiveDate.HasValue
                                         && dividend.EffectiveDate.Value > startDate
                                         && dividend.EffectiveDate.Value <= endDate
                                         && dividend.GiveCashAmount != 0
                                         && dividend.UnderlyingCode == underlyingCode
                                         && (underlying.UnderlyingInstrumentType == ConsGlobal.InstrumentType.Stock
                                             || underlying.UnderlyingInstrumentType == ConsGlobal.InstrumentType.Fund)
                                     select dividend).ToList();
            foreach (var dividend in corporatePayments)
            {
                // 按“每 10 份派现金额”口径，直接存 GiveCashAmount 原值，与同步任务/CalcPayment 保持一致。
                var paymentInterest = dividend.GiveCashAmount;
                result.Add(new BondPayment
                {
                    underlyingCode = dividend.UnderlyingCode,
                    payment_date_pl = dividend.EffectiveDate,
                    payment_date = dividend.EffectiveDate,
                    payment_interest = paymentInterest,
                    paying_price = paymentInterest,
                    create_time = dividend.OptDate,
                    update_time = dividend.OptDate,
                    IsCorporateActionCashDividend = true
                });
            }
            return result;
        }

        /// <summary>
        /// 可测性 seam：返回某债券的全部付息记录（未做日期过滤）。测试可 override 注入内存数据，
        /// 以验证日期口径（GLMS-20260105-0006：应按债权登记日 reg_date 而非支付日 pay_date_PL/pay_date_act 判定）。
        /// </summary>
        protected virtual IQueryable<BondPayment> QueryBondPayments(string underlyingCode)
            => DbContext.bondPayment.Where(x => x.underlyingCode == underlyingCode);


        public List<BondPayment> GetTargetDatePayments(string underlyingCode, DateTime targetDate)
        {
            var startDate = targetDate.Date;
            var endDate = startDate.AddDays(1);
            return DbContext.bondPayment.AsNoTracking().Where(x => x.underlyingCode == underlyingCode && x.payment_date >= startDate && x.payment_date < endDate).ToList();
        }
        /// <summary>
        /// 计算某债券某段时间的期间付息
        /// </summary>
        /// <param name="underylingCode">债券代码</param>
        /// <param name="startDate">计息开始日</param>
        /// <param name="endDate">计息结束日</param>
        /// <param name="qty">持仓数量</param>
        /// <param name="longRatio">多空方向</param>
        /// <param name="payDirection">收支方向</param>
        /// <returns></returns>
        public decimal CalcPayment(
            string underlyingCode,
            DateTime startDate,
            DateTime endDate,
            decimal qty,
            decimal longRatio,
            decimal payDirection)
        {
            var payments = GetBondPayments(underlyingCode, startDate, endDate);
            return CalcPayment(payments, qty, longRatio, payDirection);
        }
        /// <summary>
        /// 计算某标的期间现金流。债券期间付息与 Stock/Fund 公司行为现金分红可能同时命中，
        /// 必须按每条记录的来源单位分别计算，不能按标的类型对整个集合统一除以 10 或 100。
        /// </summary>
        /// <param name="payments">期间付息集合</param>
        /// <param name="qty">持仓数量</param>
        /// <param name="longRatio">多空方向</param>
        /// <param name="payDirection">收支方向</param>
        /// <returns></returns>
        public decimal CalcPayment(
            List<BondPayment> payments,
            decimal qty,
            decimal longRatio,
            decimal payDirection)
        {
            var actualAmount = (payments ?? new List<BondPayment>()).Sum(payment =>
            {
                var paymentAmount = (payment.payment_interest ?? 0m) * qty;
                // bond_payment_info 原生期间付息按每 100 份存储；由 ex_dividend_info 补充的
                // 公司行为现金分红按每 10 份存储。Fund 标的可能同时命中两类记录，故必须逐条分流。
                return payment.IsCorporateActionCashDividend
                    ? paymentAmount / 10m
                    : BondPriceConverter.ToStorage(paymentAmount);
            });
            return actualAmount * longRatio * payDirection;
        }
    }

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

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

        public DateTime ValueDateStart { get; set; }

        public DateTime ValueDateEnd { get; set; }
        // 市场
        public string MarketName { get; set; }
    }
    public class BondPaymentDto : BondPayment
    {
        public string MarketName { get; set; }
    }
}