namespace YLErp.Modules.SwapModule;

/// <summary>
/// GetInterests 参数对象（2026-08 参数显式化）。
///
/// 动机：原 GetInterests 20 个位置参数中，名义本金簇（posiNotionalValue/closePosiNotionalValue/closePercent）
/// 在【盘中平仓】与【EOD 平仓后收盘】两类场景下语义相反（详见 GetInterests "根因位置"注释与
/// GetInterestsEntrySemanticsTest 的口径留档），位置参数无法表达该约束。
///
/// 用法：只能经两个场景工厂构造——工厂形参名即该场景语义（平仓前剩余 / 平仓后剩余 / 实际平掉额），
/// 物理上防止两套语义混传。needPrice/grossPrice（原方法死参数）与 posiLong/posiShortNotionalValue
/// （多空组合子系统删除后计息链零消费的管道死参数）均不承载。
/// </summary>
public sealed class InterestCalcRequest
{
    public trade Td { get; }
    public trade_extend TradeExtend { get; }
    public DateTime ValueDate { get; }
    public DateTime UnwindDate { get; }
    public List<eod_swap_position> EodPositions { get; }
    public List<swap_position> Positions { get; }

    /// <summary>当日适用名义本金。语义随场景：盘中=平仓【前】剩余；EOD平仓后收盘=平仓【后】剩余；EOD增量=当前剩余。</summary>
    public decimal PosiNotionalValue { get; }

    /// <summary>本次实际平掉本金（两场景恒同义）。mode2 无条件覆盖 / mode9 全平兜底的输入。</summary>
    public decimal ClosePosiNotionalValue { get; }

    /// <summary>平仓比例。语义随场景：盘中=实际比例（B 占剩余）；EOD平仓后收盘=恒1（全额结息）。</summary>
    public decimal ClosePercent { get; }

    public int EventType { get; }
    public bool TdClose { get; }
    public decimal OrginPv { get; }
    public bool Add { get; }
    public bool NewCalcLast { get; }
    public List<swap_flow_event> CloseList { get; }

    private InterestCalcRequest(
        trade td, trade_extend tradeExtend, DateTime valueDate, DateTime unwindDate,
        List<eod_swap_position> eodPositions, List<swap_position> positions,
        decimal posiNotionalValue,
        decimal closePosiNotionalValue, decimal closePercent,
        int eventType, bool tdClose, decimal orginPv,
        bool add, bool newCalcLast, List<swap_flow_event> closeList)
    {
        Td = td; TradeExtend = tradeExtend; ValueDate = valueDate; UnwindDate = unwindDate;
        EodPositions = eodPositions; Positions = positions;
        PosiNotionalValue = posiNotionalValue; ClosePosiNotionalValue = closePosiNotionalValue;
        ClosePercent = closePercent; EventType = eventType; TdClose = tdClose; OrginPv = orginPv;
        Add = add; NewCalcLast = newCalcLast; CloseList = closeList;
    }

    /// <summary>
    /// 【盘中平仓/互换结息】场景（→ GetIntradayUnwindInterests，settment:false 盘中重放）。
    /// </summary>
    /// <param name="preCloseNotional">平仓【前】实时剩余本金（原 GetUnwindInterests.stockEqvNotional）。</param>
    /// <param name="closedNotional">本次实际平掉本金（= preCloseNotional × closePercentRemaining）。</param>
    /// <param name="closePercentRemaining">平仓比例，B 语义【占剩余】（前端传 A 占期初须先经 ToRemainingClosePercent 转换）。</param>
    public static InterestCalcRequest IntradayUnwind(
        trade td, trade_extend tradeExtend, DateTime valueDate, DateTime unwindDate,
        List<eod_swap_position> eodPositions, List<swap_position> positions,
        decimal preCloseNotional, decimal closedNotional, decimal closePercentRemaining,
        int eventType, bool tdClose, decimal orginPv,
        bool add, bool newCalcLast, List<swap_flow_event> closeList)
        => new(td, tradeExtend, valueDate, unwindDate, eodPositions, positions,
            preCloseNotional, closedNotional, closePercentRemaining,
            eventType, tdClose, orginPv, add, newCalcLast, closeList);

    /// <summary>
    /// 【EOD 当日有平仓后的收盘结息】场景（→ CalcEodPostCloseSettleInterests，settment:false 全额结息）。
    /// 该场景触发 GetInterests 内 mode2 无条件覆盖 / mode9 全平兜底（见其"根因位置"注释，勿删）。
    /// </summary>
    /// <param name="remainingNotionalAfterClose">平仓【后】剩余本金（GetInterests.posiNotionalValue 形参位）。</param>
    /// <param name="closedNotional">本次实际平掉本金。</param>
    public static InterestCalcRequest EodPostCloseSettle(
        trade td, trade_extend tradeExtend, DateTime valueDate, DateTime unwindDate,
        List<eod_swap_position> eodPositions, List<swap_position> positions,
        decimal remainingNotionalAfterClose, decimal closedNotional,
        int eventType, bool tdClose, decimal orginPv,
        bool add, bool newCalcLast)
        => new(td, tradeExtend, valueDate, unwindDate, eodPositions, positions,
            remainingNotionalAfterClose, closedNotional, 1m,   // 恒1：本次事件全额结息（非 closeNational / 期初比例）
            eventType, tdClose, orginPv, add, newCalcLast, closeList: null);
}