using YLErp.DBModels;
using YLErp.DBModels.Enums;

namespace YLErp.Modules.SwapModule
{
    /// <summary>
    /// 互换结息（SwapIncome）测试
    /// ============================================================================
    /// 借鉴 testable 分支命名，基于当前分支 TestableSwapDealService 共享 stub。
    /// SwapIncome 是写客户资金流水（ClientCashInCashOut）的核心入口之一。
    /// ============================================================================
    [TestClass]
    public class SwapIncomeScenarioTest
    {
        // ================================================================
        // 场景1：SwapIncome 正常结息 —— 资金流水金额正确
        // ================================================================

        /// <summary>
        /// SwapIncome 正常结息：SwapRealizedPnL=1000 → 客户资金流水金额=-1000。
        /// 后端 SwapDealService SwapIncome 直接用前端传入的 SwapRealizedPnL 记账。
        /// </summary>
        [TestMethod]
        public void SI_001_SwapIncome_正常结息_资金流水金额正确()
        {
            var td = SwapDealTestFactory.CreateTrade();
            td.ExerciseDate = new DateTime(2026, 12, 31); // 未到期，不走"已到期"分支
            var service = new TestableSwapDealService(td);
            var unwindData = SwapDealTestFactory.CreateUnwindData(swapRealizedPnL: 1000m);

            service.SwapIncome(unwindData);

            Assert.AreEqual(1, service.ClientCashCalls.Count, "应生成1条资金流水（互换）");
            Assert.AreEqual(-1000.0, service.ClientCashCalls[0].amount, 0.001, "资金流水金额 = -SwapRealizedPnL");
            Assert.AreEqual(ClientCashInCashOut.系统操作_互换, service.ClientCashCalls[0].action, "操作类型=系统操作_互换");
            Assert.AreEqual(1, service.SaveSwapDealCalls.Count, "应调用 SaveSwapDeal 1次");
            Assert.AreEqual((int)SwapEventTypeEnum.互换, service.SaveSwapDealCalls[0].eventType, "事件类型=互换(3)");
            Console.WriteLine($"SI_001: 资金流水={service.ClientCashCalls[0].amount}, 事件类型=互换 ✅");
        }

        // ================================================================
        // 场景2：SwapIncome 含预付金返息 —— 两条资金流水
        // ================================================================

        /// <summary>
        /// SwapIncome 含预付金返息：SwapRealizedPnL=1000, SwapMarginRebatePnl=200
        /// → 生成2条资金流水（互换 + 预付金返息），金额分别为 -1000、-200。
        /// </summary>
        [TestMethod]
        public void SI_002_SwapIncome_含预付金返息_两条资金流水()
        {
            var td = SwapDealTestFactory.CreateTrade();
            td.ExerciseDate = new DateTime(2026, 12, 31);
            var service = new TestableSwapDealService(td);
            var unwindData = SwapDealTestFactory.CreateUnwindData(swapRealizedPnL: 1000m, swapMarginRebatePnl: 200m);

            service.SwapIncome(unwindData);

            Assert.AreEqual(2, service.ClientCashCalls.Count, "应生成2条资金流水（互换+预付金返息）");
            Assert.AreEqual(-1000.0, service.ClientCashCalls[0].amount, 0.001, "第1条=互换金额");
            Assert.AreEqual(ClientCashInCashOut.系统操作_互换, service.ClientCashCalls[0].action);
            Assert.AreEqual(-200.0, service.ClientCashCalls[1].amount, 0.001, "第2条=预付金返息");
            Assert.AreEqual(ClientCashInCashOut.系统操作_预付金返息, service.ClientCashCalls[1].action);
            Console.WriteLine($"SI_002: 互换={service.ClientCashCalls[0].amount}, 预付金返息={service.ClientCashCalls[1].amount} ✅");
        }

        [TestMethod]
        public void SI_003_SwapIncome_含预付金腿_不返还预付金本金()
        {
            var td = SwapDealTestFactory.CreateTrade();
            td.ExerciseDate = new DateTime(2026, 12, 31);
            var service = new TestableSwapDealService(td);
            var unwindData = SwapDealTestFactory.CreateUnwindData(swapRealizedPnL: 0m);
            unwindData.FlowEvents.Add(new swap_flow_event
            {
                UnderlyingCode = "UT-FLOAT",
                MarkClosePnl = 100m,
                PayDirection = 1
            });
            unwindData.FlowEvents.Add(new swap_flow_event
            {
                InterestMode = (int)InterestModeEnum.初始预付金,
                InterestDirection = 1,
                InterestPrincipal = 10000m,
                InterestClosePnL = 2m
            });

            service.SwapIncome(unwindData);

            Assert.AreEqual(0m, unwindData.SwapMarginAmount, "手动互换不应返还预付金本金");
            Assert.IsFalse(service.ClientCashCalls.Any(x => x.action == ClientCashInCashOut.系统操作_应付预付金),
                "手动互换不应生成应付预付金流水");
            Assert.IsTrue(service.ClientCashCalls.Any(x => x.action == ClientCashInCashOut.系统操作_预付金返息),
                "手动互换仍应结算预付金返息");
        }
    }
}