describe('Inbound Receipt - PO with Lot Control', () => {
  it('receives goods against PO with lot tracking', async () => {
    const receipt = await wms.receive({
      po: 'PO-4500001234',
      item: 'MAT-100',
      quantity: 100,
      lot: 'LOT-2026-001',
      expiryDate: '2027-06-30',
      uom: 'EA'
    });

    expect(receipt.status).toBe('RECEIVED');
    expect(receipt.quantityReceived).toBe(100);
    expect(receipt.lot).toBe('LOT-2026-001');

    // Verify putaway task was created
    const putawayTask = await wms.getTask(receipt.putawayTaskId);
    expect(putawayTask.type).toBe('DIRECTED_PUTAWAY');
    expect(putawayTask.suggestedLocation).toMatch(/^BIN-/);
  });

  it('rejects over-receipt beyond tolerance', async () => {
    // PO line is for 100 EA, tolerance is 10%
    const result = await wms.receive({
      po: 'PO-4500001234',
      item: 'MAT-100',
      quantity: 115, // 15% over, exceeds 10% tolerance
      lot: 'LOT-2026-002'
    });

    expect(result.status).toBe('REJECTED');
    expect(result.reason).toContain('Over-receipt tolerance exceeded');
    expect(result.maxAllowed).toBe(110);
  });

  it('accepts under-receipt and creates remaining open quantity', async () => {
    const result = await wms.receive({
      po: 'PO-4500001234',
      item: 'MAT-100',
      quantity: 80,
      lot: 'LOT-2026-003'
    });

    expect(result.status).toBe('PARTIAL_RECEIPT');
    expect(result.quantityReceived).toBe(80);
    expect(result.remainingOpen).toBe(20);
  });
});

describe('Directed Putaway', () => {
  it('assigns location based on product attributes', async () => {
    // Hazmat product should go to hazmat zone
    const putaway = await wms.executePutaway({
      item: 'MAT-HAZ-001',
      attributes: { hazmat: true, temperature: 'ambient' },
      quantity: 50,
      lot: 'LOT-HAZ-001'
    });

    expect(putaway.location).toMatch(/^HAZ-/); // Hazmat zone prefix
    expect(putaway.status).toBe('PUTAWAY_COMPLETE');
  });

  it('falls back to overflow when primary zone is full', async () => {
    // Fill the primary zone first
    await wms.fillZone('ZONE-A', 100); // 100% capacity

    const putaway = await wms.executePutaway({
      item: 'MAT-200',
      quantity: 10,
      preferredZone: 'ZONE-A'
    });

    expect(putaway.location).toMatch(/^OVF-/); // Overflow zone
    expect(putaway.overflowReason).toBe('PRIMARY_ZONE_FULL');
  });
});

describe('Cycle Count - Blind Count', () => {
  it('auto-approves variance within threshold', async () => {
    // System shows 100 EA, physical count is 98
    const count = await wms.submitCycleCount({
      location: 'BIN-A-01-01',
      item: 'MAT-100',
      countedQuantity: 98,
      countType: 'BLIND', // Counter does not see system quantity
      varianceThreshold: 5 // percent
    });

    expect(count.systemQuantity).toBe(100);
    expect(count.variance).toBe(-2);
    expect(count.variancePercent).toBeCloseTo(2.0);
    expect(count.autoApproved).toBe(true);
    expect(count.adjustmentPosted).toBe(true);
  });

  it('requires supervisor approval when variance exceeds threshold', async () => {
    const count = await wms.submitCycleCount({
      location: 'BIN-A-01-02',
      item: 'MAT-200',
      countedQuantity: 80,
      countType: 'BLIND',
      varianceThreshold: 5 // 20% variance exceeds 5% threshold
    });

    expect(count.variancePercent).toBeCloseTo(20.0);
    expect(count.autoApproved).toBe(false);
    expect(count.adjustmentPosted).toBe(false);
    expect(count.status).toBe('PENDING_SUPERVISOR_APPROVAL');
  });

  it('triggers recount when variance is critical', async () => {
    const count = await wms.submitCycleCount({
      location: 'BIN-A-01-03',
      item: 'MAT-300',
      countedQuantity: 0, // System shows 50
      countType: 'BLIND',
      varianceThreshold: 5,
      criticalThreshold: 50
    });

    expect(count.variancePercent).toBe(100);
    expect(count.status).toBe('RECOUNT_REQUIRED');
    expect(count.recountAssigned).toBe(true);
    expect(count.recountAssignee).not.toBe(count.originalCounter);
  });
});

describe('Wave Planning and Release', () => {
  it('creates wave from eligible orders with batch-pick strategy', async () => {
    // Create 5 orders for wave planning
    const orders = await Promise.all(
      Array.from({ length: 5 }, (_, i) => wms.createOrder({
        orderId: `SO-100${i}`,
        lines: [
          { item: 'MAT-100', qty: 10 },
          { item: 'MAT-200', qty: 5 }
        ],
        priority: i === 0 ? 'RUSH' : 'STANDARD',
        shipBy: '2026-02-05'
      }))
    );

    const wave = await wms.planWave({
      strategy: 'BATCH_PICK',
      maxOrders: 10,
      cutoffTime: '2026-02-05T14:00:00Z'
    });

    expect(wave.orderCount).toBe(5);
    expect(wave.pickTasks).toBeGreaterThan(0);
    expect(wave.status).toBe('PLANNED');

    // Rush order should be first in pick sequence
    const firstTask = wave.pickTasks[0];
    expect(firstTask.orderId).toBe('SO-1000');
    expect(firstTask.priority).toBe('RUSH');
  });

  it('handles short-pick by creating backorder', async () => {
    // Only 5 EA available, order needs 10
    await wms.setInventory('BIN-B-01-01', 'MAT-500', 5);

    const order = await wms.createOrder({
      orderId: 'SO-SHORT',
      lines: [{ item: 'MAT-500', qty: 10 }]
    });

    const wave = await wms.planWave({ strategy: 'SINGLE_ORDER' });
    await wms.releaseWave(wave.id);

    // Attempt to pick
    const pickResult = await wms.confirmPick({
      taskId: wave.pickTasks[0].id,
      pickedQty: 5 // Only 5 available
    });

    expect(pickResult.status).toBe('SHORT_PICK');
    expect(pickResult.pickedQuantity).toBe(5);
    expect(pickResult.shortQuantity).toBe(5);
    expect(pickResult.backorderCreated).toBe(true);
    expect(pickResult.backorderId).toBeDefined();
  });
});

describe('FIFO Allocation', () => {
  it('allocates oldest lot first', async () => {
    // Set up two lots with different receipt dates
    await wms.receiveInventory('MAT-FIFO', 50, { lot: 'LOT-OLD', receiptDate: '2026-01-01' });
    await wms.receiveInventory('MAT-FIFO', 50, { lot: 'LOT-NEW', receiptDate: '2026-02-01' });

    const allocation = await wms.allocate({
      item: 'MAT-FIFO',
      quantity: 30,
      method: 'FIFO'
    });

    expect(allocation.allocatedLot).toBe('LOT-OLD');
    expect(allocation.quantity).toBe(30);
  });

  it('splits allocation across lots when oldest is insufficient', async () => {
    await wms.receiveInventory('MAT-SPLIT', 20, { lot: 'LOT-A', receiptDate: '2026-01-01' });
    await wms.receiveInventory('MAT-SPLIT', 50, { lot: 'LOT-B', receiptDate: '2026-01-15' });

    const allocation = await wms.allocate({
      item: 'MAT-SPLIT',
      quantity: 40,
      method: 'FIFO'
    });

    expect(allocation.splits).toHaveLength(2);
    expect(allocation.splits[0]).toEqual({ lot: 'LOT-A', quantity: 20 });
    expect(allocation.splits[1]).toEqual({ lot: 'LOT-B', quantity: 20 });
  });
});

describe('FEFO Allocation (First Expired, First Out)', () => {
  it('allocates lot with earliest expiry first', async () => {
    await wms.receiveInventory('MAT-FEFO', 50, { lot: 'LOT-EXP-LATE', expiry: '2027-12-31' });
    await wms.receiveInventory('MAT-FEFO', 50, { lot: 'LOT-EXP-SOON', expiry: '2026-06-30' });

    const allocation = await wms.allocate({
      item: 'MAT-FEFO',
      quantity: 30,
      method: 'FEFO'
    });

    expect(allocation.allocatedLot).toBe('LOT-EXP-SOON');
  });

  it('excludes expired lots from allocation', async () => {
    await wms.receiveInventory('MAT-EXPIRED', 100, { lot: 'LOT-PAST', expiry: '2025-12-31' });
    await wms.receiveInventory('MAT-EXPIRED', 50, { lot: 'LOT-VALID', expiry: '2027-12-31' });

    const allocation = await wms.allocate({
      item: 'MAT-EXPIRED',
      quantity: 30,
      method: 'FEFO'
    });

    expect(allocation.allocatedLot).toBe('LOT-VALID');
    expect(allocation.excludedLots).toContain('LOT-PAST');
    expect(allocation.excludeReason).toBe('EXPIRED');
  });
});

describe('Pack Verification', () => {
  it('verifies pack contents match pick list', async () => {
    const packResult = await wms.packVerify({
      orderId: 'SO-1001',
      cartonId: 'CTN-001',
      scannedItems: [
        { barcode: 'MAT-100-LOT001', qty: 10 },
        { barcode: 'MAT-200-LOT002', qty: 5 }
      ]
    });

    expect(packResult.status).toBe('VERIFIED');
    expect(packResult.allItemsScanned).toBe(true);
    expect(packResult.weightValidation).toBe('WITHIN_TOLERANCE');
  });

  it('rejects pack with missing items', async () => {
    const packResult = await wms.packVerify({
      orderId: 'SO-1001',
      cartonId: 'CTN-002',
      scannedItems: [
        { barcode: 'MAT-100-LOT001', qty: 10 }
        // Missing MAT-200
      ]
    });

    expect(packResult.status).toBe('INCOMPLETE');
    expect(packResult.missingItems).toContainEqual({ item: 'MAT-200', expectedQty: 5 });
  });
});

describe('Shipping and Carrier Assignment', () => {
  it('rate-shops across carriers and selects cheapest', async () => {
    const shipment = await wms.shipConfirm({
      orderId: 'SO-1001',
      cartons: ['CTN-001'],
      carrierSelection: 'RATE_SHOP',
      eligibleCarriers: ['UPS', 'FEDEX', 'USPS']
    });

    expect(shipment.status).toBe('SHIPPED');
    expect(shipment.carrier).toBeDefined();
    expect(shipment.trackingNumber).toBeDefined();
    expect(shipment.rateShopResults).toHaveLength(3);
    expect(shipment.selectedRate).toBeLessThanOrEqual(
      Math.min(...shipment.rateShopResults.map(r => r.rate))
    );
  });

  it('generates shipping label and triggers EDI 856', async () => {
    const shipment = await wms.shipConfirm({
      orderId: 'SO-1002',
      cartons: ['CTN-003'],
      carrier: 'UPS',
      service: 'GROUND'
    });

    expect(shipment.label).toBeDefined();
    expect(shipment.label.format).toBe('ZPL');
    expect(shipment.edi856Generated).toBe(true);
    expect(shipment.edi856.transactionSetId).toMatch(/^856/);
  });
});

describe('EDI 856 ASN Generation', () => {
  it('generates valid 856 with correct hierarchical levels', async () => {
    const asn = await edi.generate856({
      shipmentId: 'SHP-001',
      carrier: { scac: 'UPSN', proNumber: 'PRO-12345' },
      orders: [{
        orderId: 'SO-1001',
        items: [
          { sku: 'MAT-100', qty: 10, lot: 'LOT-001', upc: '012345678901' }
        ]
      }]
    });

    // Validate hierarchical structure: Shipment -> Order -> Item
    expect(asn.segments.filter(s => s.id === 'HL')).toHaveLength(3);
    expect(asn.getSegment('BSN', 'BSN01')).toBe('00'); // Original
    expect(asn.getSegment('TD5', 'TD504')).toBe('UPSN');
    expect(asn.getSegment('SN1', 'SN102')).toBe('10');

    // Validate segment count and control numbers
    expect(asn.getSegment('CTT', 'CTT01')).toBe('1'); // 1 transaction
    expect(asn.getSegment('SE', 'SE01')).toBeDefined(); // Segment count
  });

  it('validates 997 functional acknowledgment for sent 856', async () => {
    const asn = await edi.send856('SHP-001');
    const ack = await edi.receive997({ timeout: 30000 });

    expect(ack.transactionSetId).toBe('997');
    expect(ack.acknowledgmentCode).toBe('A'); // Accepted
    expect(ack.referencedTransactionSet).toBe('856');
  });

  it('handles 997 rejection and triggers resend', async () => {
    const asn = await edi.send856('SHP-INVALID');
    const ack = await edi.receive997({ timeout: 30000 });

    expect(ack.acknowledgmentCode).toBe('R'); // Rejected
    expect(ack.errors).toContainEqual(
      expect.objectContaining({ segmentId: 'SN1', errorCode: '7' })
    );

    // Verify resend was triggered
    const resendLog = await edi.getResendLog('SHP-INVALID');
    expect(resendLog.attempts).toBeGreaterThanOrEqual(1);
  });
});

describe('EDI 940 Inbound Processing', () => {
  it('creates WMS order from valid 940 document', async () => {
    const edi940 = loadEdiDocument('testdata/edi-940-standard.edi');
    const result = await edi.process940(edi940);

    expect(result.orderCreated).toBe(true);
    expect(result.wmsOrderId).toBeDefined();
    expect(result.lineCount).toBe(5);
    expect(result.allocationTriggered).toBe(true);
    expect(result.priorityMapped).toBe('STANDARD');
  });

  it('rejects 940 with unknown SKU and generates 997 rejection', async () => {
    const edi940 = loadEdiDocument('testdata/edi-940-invalid-sku.edi');
    const result = await edi.process940(edi940);

    expect(result.orderCreated).toBe(false);
    expect(result.errors).toContainEqual(
      expect.objectContaining({ segment: 'LIN', error: 'Unknown SKU: INVALID-SKU' })
    );
    expect(result.ack997.code).toBe('R');
  });

  it('detects duplicate 940 by BSN reference number', async () => {
    const edi940 = loadEdiDocument('testdata/edi-940-standard.edi');

    // Process first time - success
    await edi.process940(edi940);

    // Process duplicate - should detect
    const result = await edi.process940(edi940);

    expect(result.orderCreated).toBe(false);
    expect(result.duplicate).toBe(true);
    expect(result.originalOrderId).toBeDefined();
  });
});