using Admin.NET.Plugin.AiDOP.MaterialWarehouse.InventoryPosting.Inventory;
using Xunit;

namespace Admin.NET.Plugin.AiDOP.Tests.S5.MaterialWarehouse;

/// <summary>
/// C5 库存量变化契约测试（Phase 5A；纯计算，无 DB）。
/// 精确固化 pr_SFM_InventoryTransactionProcessing2 各 TransType 的 ΔQtyOnHand/ΔAvail/ΔAssay/ΔFreeze/ΔQtyOnOrd。
/// </summary>
public class InventoryBalanceCalculatorTests
{
    private static InventoryTransactionCommand Cmd(string transType, decimal changeQty, decimal umc = 1m)
        => new InventoryTransactionCommand
        {
            TransType = transType, ChangeQty = changeQty, UmConversion = umc,
            ItemNum = "IT-1", Location = "L1",
        };

    // TransType | ChangeQty | umc | conv | ΔQtyOnHand | ΔAvail | ΔAssay | ΔFreeze | ΔQtyOnOrd
    [Theory]
    // 采购收货入质检库存（IQC 合格入库核心）：在手+、质检+、可用不变
    [InlineData("rct-po-ins", 100, 1, 100, 100, 0, 100, 0, 0)]
    // 质检转出（ChangeQty<0 走 Assay 掩码）：在手-、质检-
    [InlineData("iss-tr-ins", -30, 1, -30, -30, 0, -30, 0, 0)]
    // 质检相关入（ChangeQty>0 不走 Assay 掩码）：在手+、可用+
    [InlineData("iss-tr-ins", 30, 1, 30, 30, 30, 0, 0, 0)]
    // 冻结：可用-、冻结+（ΔFreeze=-conv）
    [InlineData("inv-frz", -50, 1, -50, 0, -50, 0, 50, 0)]
    // 解冻：按 LIVE 同式（DB_PENDING 符号）
    [InlineData("inv-unfrz", -50, 1, -50, 0, -50, 0, 50, 0)]
    // 销售出库：在手-、可用-、在订-
    [InlineData("iss-so", -20, 1, -20, -20, -20, 0, 0, -20)]
    // 一般出入库（其它 TransType）：在手/可用同步
    [InlineData("rct-x-ins", 40, 1, 40, 40, 40, 0, 0, 0)]
    // UMConversion≠1：conv=ChangeQty×umc
    [InlineData("rct-po-ins", 10, 2, 20, 20, 0, 20, 0, 0)]
    public void ComputeRowDeltas_PerTransType_MatchLiveFormula(
        string tt, double changeQty, double umc, double conv,
        double dQoh, double dAvail, double dAssay, double dFreeze, double dOrd)
    {
        var d = InventoryBalanceCalculator.ComputeRowDeltas(Cmd(tt, (decimal)changeQty, (decimal)umc));
        Assert.Equal((decimal)conv, d.Conv);
        Assert.Equal((decimal)dQoh, d.DeltaQtyOnHand);
        Assert.Equal((decimal)dAvail, d.DeltaAvailStatusQty);
        Assert.Equal((decimal)dAssay, d.DeltaAssay);
        Assert.Equal((decimal)dFreeze, d.DeltaFreezeQty);
        Assert.Equal((decimal)dOrd, d.DeltaQtyOnOrd);
    }

    [Fact]
    public void ComputeRowDeltas_UmConversionZero_NormalizedToOne()
    {
        var d = InventoryBalanceCalculator.ComputeRowDeltas(Cmd("rct-po-ins", 7m, 0m));
        Assert.Equal(7m, d.Conv);        // umc 0 → 1
        Assert.Equal(7m, d.DeltaAssay);
    }

    [Fact]
    public void Project_BeforeToAfter_RctPoIns_IncreasesOnHandAndAssayOnly()
    {
        var before = new InventoryBalance { QtyOnHand = 100m, AvailStatusQty = 80m, Assay = 20m, FreezeQty = 0m, QtyOnOrd = 0m };
        var (d, after) = InventoryBalanceCalculator.Project(before, Cmd("rct-po-ins", 50m));
        Assert.Equal(50m, d.Conv);
        Assert.Equal(150m, after.QtyOnHand);   // 在手 +50
        Assert.Equal(80m, after.AvailStatusQty); // 可用不变（进质检）
        Assert.Equal(70m, after.Assay);         // 质检 +50
        Assert.Equal(0m, after.FreezeQty);
        // 不 mutate 入参
        Assert.Equal(100m, before.QtyOnHand);
    }

    [Fact]
    public void Project_Freeze_MovesAvailToFreeze()
    {
        var before = new InventoryBalance { QtyOnHand = 100m, AvailStatusQty = 100m, Assay = 0m, FreezeQty = 0m };
        var (_, after) = InventoryBalanceCalculator.Project(before, Cmd("inv-frz", -40m));
        Assert.Equal(100m, after.QtyOnHand); // 在手不变
        Assert.Equal(60m, after.AvailStatusQty); // 可用 -40
        Assert.Equal(40m, after.FreezeQty);   // 冻结 +40
    }

    [Fact]
    public void BuildTransHist_RctPoIns_FieldsMatchLive()
    {
        var cmd = Cmd("rct-po-ins", 100m);
        cmd.Price = 5m;
        var d = InventoryBalanceCalculator.ComputeRowDeltas(cmd);
        var h = InventoryBalanceCalculator.BuildTransHist(cmd, d, beginBalance: 100m);
        Assert.Equal(100m, h.BeginBalance);
        Assert.Equal(100m, h.QtyChange);   // 非 frz → conv
        Assert.Equal(0m, h.FreezeQty);
        Assert.Equal(100m, h.Assay);
        Assert.Equal(500m, h.Amt);         // conv × Price
        Assert.Equal("rct-po-ins", h.TransType);
    }

    [Fact]
    public void BuildTransHist_FreezeTrans_QtyChangeZero()
    {
        var cmd = Cmd("inv-frz", -50m);
        var d = InventoryBalanceCalculator.ComputeRowDeltas(cmd);
        var h = InventoryBalanceCalculator.BuildTransHist(cmd, d, 0m);
        Assert.Equal(0m, h.QtyChange);     // frz/unfrz 流水 QtyChange=0
        Assert.Equal(50m, h.FreezeQty);
    }

    [Fact]
    public void BuildTransHist_QcCheckRemark_UsesReasonAsTransType()
    {
        var cmd = Cmd("rct-po-ins", 10m);
        cmd.Remark = "QcCheck";
        cmd.Reason = "iqc-pass";
        var d = InventoryBalanceCalculator.ComputeRowDeltas(cmd);
        var h = InventoryBalanceCalculator.BuildTransHist(cmd, d, 0m);
        Assert.Equal("iqc-pass", h.TransType);   // Remark=='QcCheck' → 取 Reason
    }

    [Fact]
    public void ComputeRowDeltas_NullCommand_Throws()
    {
        Assert.Throws<ArgumentNullException>(() => InventoryBalanceCalculator.ComputeRowDeltas(null));
    }
}