fix issue and add consolidation

apps/edr-freight-api/src/modules/train-scheduling/booking-batch.service.spec.ts

@@ -1536,4 +1536,72 @@ describe('BookingBatchService — physical wagon-type gate', () => {
     // Those 16 are now held, so the next booking in the pass cannot re-take them.
     expect(stock.availableFor([NW5], WHOLE_LEG)).toBe(0);
   });
+
+  it('sizes a capped-bulk partial on ONE type at the cargo cap, not the 70T rating', async () => {
+    const svc = service();
+    const inner = internals(svc);
+    (inner as { isSplitEligible: unknown }).isSplitEligible = () => true;
+    const dims = { lengthMeters: 14, tareWeightTons: 24, capacityTons: 70 };
+    (inner as unknown as { loadWagonDims: unknown }).loadWagonDims = async () => ({
+      container: dims,
+      bulk: dims,
+      byWagonTypeId: new Map([
+        [NW5, dims],
+        [PW2, dims],
+      ]),
+    });
+    const tryPartial = jest
+      .fn()
+      .mockResolvedValue({ wagons: 16, weightTons: 864, lengthMeters: 224 });
+    (inner as { tryPartialOffer: unknown }).tryPartialOffer = tryPartial;
+
+    const stock = mixedStock();
+    const candidate = {
+      id: 'schedule-1',
+      budget: {
+        legOf: () => WHOLE_LEG,
+        remainingFor: () => ({ wagons: 20, weightTons: 99_999, lengthMeters: 99_999 }),
+        subtract: jest.fn(),
+      },
+      armed: false,
+      stock,
+    };
+    const booking = {
+      id: 'b2',
+      reference: 'BK-2',
+      originYardId: 'a',
+      destinationYardId: 'b',
+      freightType: 'BULK',
+      cargoTotalWeightVgm: 695,
+      cargoType: {
+        id: 'cargo-perishable',
+        wagonTypes: [
+          { id: NW5, capacityTons: 70 },
+          { id: PW2, capacityTons: 70 },
+        ],
+        tonsPerWagonMap: { [NW5]: 30, [PW2]: 20 },
+      },
+      bookingContainers: [],
+    } as unknown as Booking;
+
+    const offered = await inner.maybeOfferPartial(
+      booking,
+      false,
+      [candidate],
+      { wagons: 24, weightTons: 1400, lengthMeters: 336 },
+      [NW5, PW2],
+    );
+
+    expect(offered).toBe(true);
+    // Room capped to the 16 NW5 that exist (biggest capped take), and the seat
+    // carries the 30T cargo cap — never the wagon's raw 70T rating.
+    expect(tryPartial.mock.calls[0][2]).toMatchObject({ wagons: 16 });
+    expect(tryPartial.mock.calls[0][4]).toMatchObject({
+      wagonTypeId: NW5,
+      perWagon: { capacityTons: 30 },
+    });
+    // Only the seated type is held; the PW2s stay free for bulk-only cargo.
+    expect(stock.availableFor([NW5], WHOLE_LEG)).toBe(0);
+    expect(stock.availableFor([PW2], WHOLE_LEG)).toBe(4);
+  });
 });

apps/edr-freight-api/src/modules/train-scheduling/booking-batch.service.ts

@@ -2831,7 +2831,6 @@ export class BookingBatchService implements OnModuleInit {
     wagonTypeIds: string[] = [],
   ): Promise<boolean> {
     if (!this.isSplitEligible(booking, isPair)) return false;
-    const wagonDims = await this.loadWagonDims();
     // PER_TON bulk partials are sized on ONE concrete wagon type at the
     // cargo's per-wagon cap — sizing on the first type's raw 70T rating
     // offered tonnage the wagons could never carry (Perishable caps at
@@ -2846,6 +2845,7 @@ export class BookingBatchService implements OnModuleInit {
       booking.freightType === "BULK" &&
       !perItemBulk &&
       wagonTypeIds.length > 0;
+    const wagonDims = cappedBulk ? await this.loadWagonDims() : null;
     const target = candidates
       .map((c) => {
         const leg = c.budget.legOf(booking.originYardId, booking.destinationYardId);
@@ -2856,7 +2856,7 @@ export class BookingBatchService implements OnModuleInit {
         // them NW5" into an offer for 16 — the customer pays for 16 and the
         // other 4 leave as the usual remainder booking, instead of paying for
         // 20 and stalling at allocation on wagon 17.
-        if (cappedBulk) {
+        if (cappedBulk && wagonDims) {
           const best = this.allowedDimsWithTypes(booking, wagonDims)
             .filter((o): o is { wagonTypeId: string; dims: PerWagonDims } =>
               o.wagonTypeId != null,