using Microsoft.VisualStudio.TestTools.UnitTesting;
using YLErp.DBModels;

namespace YLErp.Modules.EodModule
{
    /// <summary>
    /// FR007 错行根因的校正决策单测（GLMS-20260701）。
    /// 对应最近提交的 bugfix：eod_commodity_future_price 入库前以 UnderlyingCode(=FutureContractId) 为准
    /// 重派生 UnderlyingId，防止 UnderlyingId 与 FutureContractId 失同步导致"网页能查到、EOD 结算查不到"。
    /// 这里只测纯函数 ResolveUnderlyingIdForCode，不依赖数据库。
    ///
    /// 生产事故还原：FR007 价格行的 FutureContractId='FR007'，但 UnderlyingId 被错写成
    ///   511160.SH 的 2173889 / 159111.SZ 的 2173890，正确应为 FR007 的 2170838。
    /// 网页端按 UnderlyingId(int) JOIN underlying_manager 把 FR007 行误挂到 511160.SH；
    /// 而 EOD 结算按 UnderlyingCode(string) JOIN 查不到，报"结算价格缺失"。
    /// </summary>
    [TestClass]
    public class EodPriceUnderlyingIdGuardTest
    {
        private const int Fr007CorrectId = 2170838;
        private const int Id511160 = 2173889;   // 511160.SH 的 id（被错写）
        private const int Id159111 = 2173890;   // 159111.SZ 的 id（被错写）

        [TestMethod]
        public void 空UnderlyingCode_维持原值()
        {
            Assert.AreEqual(123, EodPriceService.ResolveUnderlyingIdForCode("", 123, null));
            Assert.AreEqual(123, EodPriceService.ResolveUnderlyingIdForCode(null, 123, 999));
            Assert.AreEqual(123, EodPriceService.ResolveUnderlyingIdForCode("   ", 123, 999));
        }

        [TestMethod]
        public void 标的不存在_维持原值()
        {
            // resolvedId=null 表示 underlying_manager 无此代码，无法校正
            Assert.AreEqual(Id511160,
                EodPriceService.ResolveUnderlyingIdForCode("FR007", Id511160, null));
        }

        [TestMethod]
        public void 已一致_维持原值()
        {
            Assert.AreEqual(Fr007CorrectId,
                EodPriceService.ResolveUnderlyingIdForCode("FR007", Fr007CorrectId, Fr007CorrectId));
        }

        [TestMethod]
        public void 不一致_校正为正确id_FR007生产错行_511160()
        {
            // 生产事故：FR007 行 UnderlyingId=2173889(511160.SH) → 应校正为 2170838
            Assert.AreEqual(Fr007CorrectId,
                EodPriceService.ResolveUnderlyingIdForCode("FR007", Id511160, Fr007CorrectId));
        }

        [TestMethod]
        public void 不一致_校正为正确id_FR007生产错行_159111()
        {
            // 生产事故：另两条错行 UnderlyingId=2173890(159111.SZ) → 应校正为 2170838
            Assert.AreEqual(Fr007CorrectId,
                EodPriceService.ResolveUnderlyingIdForCode("FR007", Id159111, Fr007CorrectId));
        }

        [TestMethod]
        public void 行对象_端到端校正_FR007()
        {
            var row = new eod_commodity_future_price
            {
                UnderlyingCode = "FR007",
                UnderlyingId = Id511160
            };
            // 模拟 db.underlying_manager 解析到的正确 id
            int resolved = Fr007CorrectId;
            int? before = row.UnderlyingId;
            row.UnderlyingId = EodPriceService.ResolveUnderlyingIdForCode(row.UnderlyingCode, row.UnderlyingId ?? 0, resolved);

            Assert.AreNotEqual(before, row.UnderlyingId);
            Assert.AreEqual((int?)Fr007CorrectId, row.UnderlyingId);
        }

        [TestMethod]
        public void 典型非错配_不同标的_各自正确不互相覆盖()
        {
            // 511160.SH 自己的行（FutureContractId='511160.SH'），UnderlyingId 已是 2173889 → 不动
            Assert.AreEqual(Id511160,
                EodPriceService.ResolveUnderlyingIdForCode("511160.SH", Id511160, Id511160));
        }
    }
}