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

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

/// <summary>
/// C5 9 道前置守卫正反测试（Phase 5A；纯校验，无 DB）。
/// LIVE 实核为 9 道；旧方案文档「8 道」为不完整总结（遗漏 G8 iss-tr-ins 质检过账≤质检库存）。
/// 实施以 pr_SFM_InventoryTransactionProcessing2 为最终契约。
/// </summary>
public class InventoryGuardValidatorTests
{
    private static InventoryTransactionCommand Cmd(string tt, decimal qty, string item = "IT-1", string loc = "L1", string lot = "", string refs = "")
        => new InventoryTransactionCommand { TransType = tt, ChangeQty = qty, ItemNum = item, Location = loc, LotSerial = lot, Refs = refs };

    private static InventoryContext Ctx(
        bool lotControl = false, bool dup = false, decimal avail = 1000m, decimal freeze = 1000m, decimal assay = 1000m,
        bool withItem = true, bool withLoc = true, bool withInvMaster = true, bool withDetail = true,
        string item = "IT-1", string loc = "L1", string lot = "", string refs = "")
    {
        var ctx = new InventoryContext { IsLotControl = lotControl, HasDuplicateBaseData = dup };
        if (withItem) ctx.Items.Add(item);
        if (withLoc) ctx.Locations.Add(loc);
        if (withInvMaster) ctx.InvMasters[InventoryContext.InvKey(item, loc)] = new InventoryBalance { QtyOnHand = 1000m, AvailStatusQty = avail, Assay = assay, FreezeQty = freeze };
        if (withDetail)
        {
            var k = lotControl ? InventoryContext.DetailKey(item, loc, lot, refs) : InventoryContext.DetailKey(item, loc, "", "");
            ctx.LocationDetails[k] = new InventoryBalance { QtyOnHand = 1000m, AvailStatusQty = avail, Assay = assay, FreezeQty = freeze };
        }
        return ctx;
    }

    private static List<InventoryTransactionCommand> L(params InventoryTransactionCommand[] c) => c.ToList();

    [Fact]
    public void G1_DuplicateBaseData_Fails()
    {
        var e = InventoryGuardValidator.Validate(L(Cmd("rct-po-ins", 10)), Ctx(dup: true));
        Assert.Single(e);
        Assert.Equal(InventoryGuardCode.DuplicateBaseData, e[0].Code);
    }

    [Fact]
    public void G2_ItemMasterMissing_Fails_Present_Passes()
    {
        var bad = InventoryGuardValidator.Validate(L(Cmd("rct-po-ins", 10)), Ctx(withItem: false));
        Assert.Contains(bad, x => x.Code == InventoryGuardCode.ItemMasterMissing);
        var ok = InventoryGuardValidator.Validate(L(Cmd("rct-po-ins", 10)), Ctx());
        Assert.Empty(ok);
    }

    [Fact]
    public void G3_LocationMasterMissing_Fails()
    {
        var e = InventoryGuardValidator.Validate(L(Cmd("rct-po-ins", 10)), Ctx(withLoc: false));
        Assert.Contains(e, x => x.Code == InventoryGuardCode.LocationMasterMissing);
    }

    [Fact]
    public void G4_InvMasterMissing_OnNetOutbound_Fails()
    {
        // 净出库 且 无 InvMaster
        var e = InventoryGuardValidator.Validate(L(Cmd("iss-x", -10)), Ctx(withInvMaster: false, withDetail: false));
        Assert.Contains(e, x => x.Code == InventoryGuardCode.InvMasterMissing);
        // 入库则不触发 G4
        var ok = InventoryGuardValidator.Validate(L(Cmd("rct-po-ins", 10)), Ctx(withInvMaster: false, withDetail: false));
        Assert.DoesNotContain(ok, x => x.Code == InventoryGuardCode.InvMasterMissing);
    }

    [Fact]
    public void G5_LocationDetailMissing_OnNetOutbound_Fails()
    {
        var e = InventoryGuardValidator.Validate(L(Cmd("iss-x", -10)), Ctx(withDetail: false));
        Assert.Contains(e, x => x.Code == InventoryGuardCode.LocationDetailMissing);
    }

    [Fact]
    public void G6_UnfreezeExceedsFreeze_Fails_Sufficient_Passes()
    {
        var bad = InventoryGuardValidator.Validate(L(Cmd("inv-unfrz", -100)), Ctx(freeze: 50m));
        Assert.Contains(bad, x => x.Code == InventoryGuardCode.UnfreezeExceedsFreeze);
        var ok = InventoryGuardValidator.Validate(L(Cmd("inv-unfrz", -100)), Ctx(freeze: 200m));
        Assert.Empty(ok);
    }

    [Fact]
    public void G7_FreezeExceedsAvail_Fails()
    {
        var e = InventoryGuardValidator.Validate(L(Cmd("inv-frz", -100)), Ctx(avail: 50m));
        Assert.Contains(e, x => x.Code == InventoryGuardCode.FreezeExceedsAvail);
    }

    [Fact]
    public void G8_AssayIssueExceedsAssay_Fails()
    {
        // 旧总结遗漏的一道
        var e = InventoryGuardValidator.Validate(L(Cmd("iss-tr-ins", -100)), Ctx(assay: 50m));
        Assert.Contains(e, x => x.Code == InventoryGuardCode.AssayIssueExceedsAssay);
    }

    [Fact]
    public void G9_IssueExceedsAvail_Fails()
    {
        var e = InventoryGuardValidator.Validate(L(Cmd("iss-x", -100)), Ctx(avail: 50m));
        Assert.Contains(e, x => x.Code == InventoryGuardCode.IssueExceedsAvail);
    }

    [Fact]
    public void AllGuardsPass_RctPoInsInbound_NoErrors()
    {
        var e = InventoryGuardValidator.Validate(L(Cmd("rct-po-ins", 100)), Ctx());
        Assert.Empty(e);
    }

    [Fact]
    public void LotControl_G5_MissingBatch_IncludesLot()
    {
        var e = InventoryGuardValidator.Validate(
            L(Cmd("iss-x", -10, lot: "LOT-A")),
            Ctx(lotControl: true, withDetail: false, lot: "LOT-A"));
        var err = Assert.Single(e, x => x.Code == InventoryGuardCode.LocationDetailMissing);
        Assert.Equal("LOT-A", err.LotSerial);
    }

    [Fact]
    public void LotControl_DifferentLot_IsolatedStock()
    {
        // LOT-A 有库存、LOT-B 无 → 出 LOT-B 触发 G5，不受 LOT-A 影响
        var ctx = Ctx(lotControl: true, withDetail: true, lot: "LOT-A");
        var e = InventoryGuardValidator.Validate(L(Cmd("iss-x", -10, lot: "LOT-B")), ctx);
        Assert.Contains(e, x => x.Code == InventoryGuardCode.LocationDetailMissing && x.LotSerial == "LOT-B");
    }
}