using Newtonsoft.Json;
using YLErp.DBModels;
using YLErp.DBModels.Enums;

namespace YLErp.Modules.SwapModule
{
    /// <summary>
    /// 诊断测试：验证「浮动腿 fpositions 仍用 origPositions(orig 100M)」对本 deal 的
    /// 预付金/返回预付金结果是否产生影响。结论预期：本 deal 利息腿只有 mode 9(标的期初全价)
    /// 与 mode 5(初始预付金)，CalcNotionalByMode 中 posiLong/posiShort 仅在「多头/空头存续名义本金」
    /// 分支被消费(L709-716)，故本 deal 即便 fpositions 用 orig 100M，预付金腿结果也不受其影响。
    /// 本测试仅做诊断/验证，不改动任何生产代码；用反射调用 private CalcNotionalByMode 以直接证明
    /// “mode 9 / mode 5 的 closePrincipal 不依赖 posiLong/posiShort”。
    /// </summary>
    [TestClass]
    public class SwapUnwindFloatingLegDiagnosticTdd
    {
        private sealed class StubSwapDealService : SwapDealService
        {
            public StubSwapDealService(OptUserInfo optUser) : base(optUser) { }
            protected override bool TryGetFloatRate(DateTime valueDate, string underlyingCode, out double rate)
            { rate = 0; return false; }
        }

        private const decimal OrigFix = 99_000m;          // 期初预付金腿初始本金
        private const decimal RealFix = 66_813.12m;       // 实时预付金腿剩余本金(4 次平仓后)
        private const decimal OrigLong = 100_000_000m;    // 期初标的(多头)名义本金
        private const decimal RealLong = 68_947_200m;    // 实时标的(多头)剩余名义本金
        private const decimal ClosePct = 0.1m;            // 本次平仓比例 10%

        private static readonly DateTime D0 = new(2026, 7, 1);
        private static readonly DateTime D1 = new(2026, 7, 16);

        private SwapDealService _svc;
        [TestInitialize] public void Init() => _svc = new StubSwapDealService(new OptUserInfo(0, nameof(SwapUnwindFloatingLegDiagnosticTdd), OptUserFrom.UnitTest));

        // ---- GLMS 双轨持仓构造 ----
        private static swap_position OrigPrepay(decimal fix = OrigFix) => new swap_position
        { id = 35798, SwapTradeId = 1993, PosiDirection = 0, InterestMode = (int)InterestModeEnum.初始预付金,
          InterestPrincipalFix = fix, IsInitial = true, Invalid = false, InterestType = (int)InterestTypeEnum.单利,
          interest_rest_days = 1, InterestDirection = (int)SwapDirectionEnum.收取, InterestSwapInterval = "[]" };
        private static swap_position RealPrepay(decimal fix = RealFix) => new swap_position
        { id = 35871, SwapTradeId = 1993, PositionId = 35798, PosiDirection = 0, InterestMode = (int)InterestModeEnum.初始预付金,
          InterestPrincipalFix = fix, IsInitial = false, Invalid = false, InterestType = (int)InterestTypeEnum.单利,
          interest_rest_days = 1, InterestDirection = (int)SwapDirectionEnum.收取, InterestSwapInterval = "[]" };
        private static swap_position OrigBasePrice() => new swap_position
        { id = 35797, SwapTradeId = 1993, PosiDirection = 0, InterestMode = (int)InterestModeEnum.标的期初全价,
          InterestPrincipalFix = 0, IsInitial = true, Invalid = false, InterestType = (int)InterestTypeEnum.单利,
          interest_rest_days = 1, InterestSwapInterval = "[]" };
        private static swap_position RealBasePrice() => new swap_position
        { id = 35870, SwapTradeId = 1993, PositionId = 35797, PosiDirection = 0, InterestMode = (int)InterestModeEnum.标的期初全价,
          InterestPrincipalFix = 0, IsInitial = false, Invalid = false, InterestType = (int)InterestTypeEnum.单利,
          interest_rest_days = 1, InterestSwapInterval = "[]" };
        private static swap_position OrigLongLeg() => new swap_position
        { id = 35799, SwapTradeId = 1993, PosiDirection = 2, PositionType = (int)PositionTypeFlag.Long, InterestMode = 0,
          PosiNotionalValue = OrigLong, IsInitial = true, Invalid = false };
        private static swap_position RealLongLeg() => new swap_position
        { id = 35872, SwapTradeId = 1993, PositionId = 35799, PosiDirection = 2, PositionType = (int)PositionTypeFlag.Long, InterestMode = 0,
          PosiNotionalValue = RealLong, IsInitial = false, Invalid = false };

        private static trade MakeTrade()
        {
            var extend = new trade_extend { TradeId = 1993, ExtendJson = JsonConvert.SerializeObject(new TradeExtendJson
            { AnnualDays = 365, InterestCalcMode = "10", SettlementRules = 0 }) };
            return new trade { id = 1993, TradeNumber = "GLMS-20260701-0008", ClientId = 999998, TradeType = "收益互换",
                TradeDate = D0, StartDate = D0, ExerciseDate = D1, TradeStatus = "确认成交", ValidState = "Valid",
                StockEqvNotional = (double)RealLong, Notional = (double)RealLong, trade_extend = extend };
        }
    }
}