describe('Order-to-Cash E2E Flow', () => {
  it('processes web order through SAP to warehouse fulfillment', async () => {
    // Step 1: Create order via web API
    const webOrder = await api.post('/orders', {
      customerId: 'CUST-1000',
      items: [{ materialNumber: 'MAT-500', quantity: 10 }],
      shippingAddress: { city: 'Portland', state: 'OR' }
    });
    expect(webOrder.status).toBe(201);
    const webOrderId = webOrder.body.orderId;

    // Step 2: Verify SAP Sales Order created via middleware
    const sapOrder = await sapClient.call('BAPI_SALESORDER_GETLIST', {
      CUSTOMER_NUMBER: 'CUST-1000',
      SALES_ORGANIZATION: '1000'
    });
    const matchingSapOrder = sapOrder.find(o => o.PURCHASE_ORDER_NO === webOrderId);
    expect(matchingSapOrder).toBeDefined();
    const sapOrderId = matchingSapOrder.SD_DOC;

    // Step 3: Verify WMS received pick instruction
    const wmsPickTask = await wmsApi.get(`/pick-tasks?externalRef=${sapOrderId}`);
    expect(wmsPickTask.status).toBe(200);
    expect(wmsPickTask.body.status).toBe('PENDING');

    // Step 4: Complete pick in WMS
    await wmsApi.post(`/pick-tasks/${wmsPickTask.body.taskId}/complete`, {
      pickedItems: [{ sku: 'MAT-500', quantity: 10, location: 'A-01-03' }]
    });

    // Step 5: Verify SAP delivery created (via IDoc confirmation)
    await waitFor(async () => {
      const delivery = await sapClient.call('BAPI_DELIVERYPROCESSING_GETLIST', {
        SALES_ORDER: sapOrderId
      });
      return delivery.length > 0 && delivery[0].DELVRY_STATUS === 'C';
    }, { timeout: 30000, interval: 3000 });

    // Step 6: Verify invoice posted in SAP
    await waitFor(async () => {
      const invoice = await sapClient.call('BAPI_BILLINGDOC_GETLIST', {
        REFDOCNUMBER: sapOrderId
      });
      return invoice.length > 0;
    }, { timeout: 30000, interval: 3000 });
  });
});

describe('Procure-to-Pay E2E Flow', () => {
  it('creates purchase requisition through to vendor payment', async () => {
    // Step 1: Create Purchase Requisition
    const prResult = await sapClient.call('BAPI_PR_CREATE', {
      PRHEADER: { PR_TYPE: 'NB', CTRL_IND: '' },
      PRHEADERX: { PR_TYPE: 'X' },
      PRITEMS: [{ MATERIAL: 'MAT-RAW-100', QUANTITY: 500, UNIT: 'EA', PLANT: '1000' }]
    });
    expect(prResult.NUMBER).toBeDefined();
    const prNumber = prResult.NUMBER;

    // Step 2: Verify PR triggers sourcing (ME57 equivalent)
    const sourcingResult = await sapClient.call('BAPI_PR_GETDETAIL', {
      NUMBER: prNumber
    });
    expect(sourcingResult.PRITEM[0].PREQ_NO).toBe(prNumber);

    // Step 3: Create Purchase Order from PR
    const poResult = await sapClient.call('BAPI_PO_CREATE1', {
      POHEADER: { COMP_CODE: '1000', DOC_TYPE: 'NB', VENDOR: 'VEND-500' },
      POITEMS: [{ PO_ITEM: '00010', MATERIAL: 'MAT-RAW-100', QUANTITY: 500, PLANT: '1000' }]
    });
    expect(poResult.PO_NUMBER).toBeDefined();

    // Step 4: Verify PO IDoc sent to vendor
    const idocStatus = await sapClient.call('IDOC_STATUS_READ', {
      DOCNUM: poResult.IDOC_NUMBER
    });
    expect(idocStatus.STATUS).toBe('03'); // Successfully sent
  });
});

describe('SAP RFC/BAPI Testing', () => {
  it('validates BAPI return structure and error handling', async () => {
    // Test with valid input
    const result = await sapClient.call('BAPI_MATERIAL_GETDETAIL', {
      MATERIAL: 'MAT-EXIST'
    });
    expect(result.RETURN.TYPE).not.toBe('E');
    expect(result.MATERIAL_GENERAL_DATA.MATL_DESC).toBeDefined();

    // Test with invalid material
    const errorResult = await sapClient.call('BAPI_MATERIAL_GETDETAIL', {
      MATERIAL: 'MAT-NONEXIST'
    });
    expect(errorResult.RETURN.TYPE).toBe('E');
    expect(errorResult.RETURN.MESSAGE).toContain('does not exist');
  });

  it('handles BAPI commit correctly', async () => {
    const createResult = await sapClient.call('BAPI_SALESORDER_CREATEFROMDAT2', {
      ORDER_HEADER_IN: {
        DOC_TYPE: 'OR',
        SALES_ORG: '1000',
        DISTR_CHAN: '10',
        DIVISION: '00'
      },
      ORDER_PARTNERS: [{ PARTN_ROLE: 'AG', PARTN_NUMB: 'CUST-1000' }],
      ORDER_ITEMS_IN: [{ MATERIAL: 'MAT-500', TARGET_QTY: 10 }]
    });

    // Must call BAPI_TRANSACTION_COMMIT to persist
    await sapClient.call('BAPI_TRANSACTION_COMMIT', { WAIT: 'X' });

    // Verify order exists after commit
    const getResult = await sapClient.call('BAPI_SALESORDER_GETDETAIL', {
      SALESDOCUMENT: createResult.SALESDOCUMENT
    });
    expect(getResult.ORDER_HEADER_OUT.SD_DOC_CAT).toBe('C');
  });
});

describe('SAP IDoc Processing', () => {
  it('validates inbound IDoc creates correct SAP document', async () => {
    // Send IDoc via middleware
    const idocPayload = {
      IDOCTYP: 'ORDERS05',
      MESTYP: 'ORDERS',
      SNDPOR: 'SAPEXT',
      SNDPRT: 'LS',
      SNDPRN: 'EXTERN',
      RCVPOR: 'SAPSI1',
      RCVPRT: 'LS',
      RCVPRN: 'SAPCLNT100',
      segments: {
        E1EDK01: { BELNR: 'EXT-PO-001' },
        E1EDK14: [{ QUESSION: '001', ORGID: '1000' }],
        E1EDP01: [{ POSEX: '000010', MENGE: '100', MENEE: 'EA', MATNR: 'MAT-500' }]
      }
    };

    const idocNumber = await middlewareClient.sendIDoc(idocPayload);

    // Wait for IDoc processing in SAP
    await waitFor(async () => {
      const status = await sapClient.call('IDOC_STATUS_READ', { DOCNUM: idocNumber });
      return status.STATUS === '53'; // Application document posted successfully
    }, { timeout: 60000, interval: 5000 });

    // Verify SAP document was created
    const sapDoc = await sapClient.call('BAPI_SALESORDER_GETLIST', {
      PURCHASE_ORDER_NO: 'EXT-PO-001'
    });
    expect(sapDoc).toHaveLength(1);
  });

  it('handles IDoc error status correctly', async () => {
    // Send IDoc with invalid material
    const idocPayload = buildIdocPayload({ materialNumber: 'INVALID-MAT' });
    const idocNumber = await middlewareClient.sendIDoc(idocPayload);

    await waitFor(async () => {
      const status = await sapClient.call('IDOC_STATUS_READ', { DOCNUM: idocNumber });
      return ['51', '56'].includes(status.STATUS); // Error statuses
    }, { timeout: 60000 });

    const status = await sapClient.call('IDOC_STATUS_READ', { DOCNUM: idocNumber });
    expect(status.STATUS_TEXT).toContain('Material');
  });
});

describe('SAP OData Service Testing', () => {
  it('validates OData entity CRUD operations', async () => {
    // CREATE
    const createResponse = await odataClient.post('/sap/opu/odata/sap/API_SALES_ORDER_SRV/A_SalesOrder', {
      SalesOrderType: 'OR',
      SalesOrganization: '1000',
      DistributionChannel: '10',
      OrganizationDivision: '00',
      SoldToParty: 'CUST-1000'
    });
    expect(createResponse.status).toBe(201);
    const salesOrder = createResponse.body.d.SalesOrder;

    // READ with $expand
    const readResponse = await odataClient.get(
      `/sap/opu/odata/sap/API_SALES_ORDER_SRV/A_SalesOrder('${salesOrder}')?$expand=to_Item`
    );
    expect(readResponse.status).toBe(200);
    expect(readResponse.body.d.SalesOrder).toBe(salesOrder);

    // READ collection with $filter
    const listResponse = await odataClient.get(
      `/sap/opu/odata/sap/API_SALES_ORDER_SRV/A_SalesOrder?$filter=SoldToParty eq 'CUST-1000'&$top=10`
    );
    expect(listResponse.status).toBe(200);
    expect(listResponse.body.d.results.length).toBeGreaterThan(0);
  });

  it('validates OData $metadata contract', async () => {
    const metadata = await odataClient.get(
      '/sap/opu/odata/sap/API_SALES_ORDER_SRV/$metadata'
    );
    expect(metadata.status).toBe(200);

    const parsedMetadata = parseEdmx(metadata.body);
    expect(parsedMetadata.entityTypes).toContain('A_SalesOrder');
    expect(parsedMetadata.entityTypes).toContain('A_SalesOrderItem');

    // Validate required properties exist
    const salesOrderType = parsedMetadata.getEntityType('A_SalesOrder');
    expect(salesOrderType.properties).toContain('SalesOrder');
    expect(salesOrderType.properties).toContain('SalesOrderType');
    expect(salesOrderType.navigationProperties).toContain('to_Item');
  });
});

describe('Fiori Launchpad App Testing', () => {
  it('validates Fiori tile loads and displays correct data', async () => {
    await page.goto(`${fioriLaunchpadUrl}#SalesOrder-manage`);

    // Wait for OData call to complete
    await page.waitForResponse(resp =>
      resp.url().includes('API_SALES_ORDER_SRV') && resp.status() === 200
    );

    // Verify smart table loaded with data
    const tableRows = await page.locator('table tbody tr');
    expect(await tableRows.count()).toBeGreaterThan(0);

    // Verify filter bar is functional
    await page.fill('[data-sap-ui="filterField-SalesOrder"]', '1000000');
    await page.click('[data-sap-ui="btnGo"]');

    await page.waitForResponse(resp =>
      resp.url().includes("$filter=SalesOrder eq '1000000'")
    );
  });
});

describe('Cross-System Data Consistency', () => {
  it('SAP inventory matches WMS inventory', async () => {
    const materials = ['MAT-100', 'MAT-200', 'MAT-300'];

    for (const material of materials) {
      // Get SAP stock
      const sapStock = await sapClient.call('BAPI_MATERIAL_STOCK_REQ_LIST', {
        MATERIAL: material,
        PLANT: '1000'
      });
      const sapQuantity = parseFloat(sapStock.TOTAL_STOCK);

      // Get WMS inventory
      const wmsInventory = await wmsApi.get(`/inventory/${material}`);
      const wmsQuantity = wmsInventory.body.availableQuantity;

      expect(wmsQuantity).toBe(sapQuantity);
    }
  });

  it('customer master data is consistent across systems', async () => {
    const customerId = 'CUST-1000';

    const sapCustomer = await sapClient.call('BAPI_CUSTOMER_GETDETAIL', {
      CUSTOMERNO: customerId
    });

    const crmCustomer = await crmApi.get(`/customers/${customerId}`);
    const wmsCustomer = await wmsApi.get(`/customers/${customerId}`);

    // Core fields must match
    expect(crmCustomer.body.name).toBe(sapCustomer.CUSTOMER_GENERAL_DATA.NAME);
    expect(wmsCustomer.body.name).toBe(sapCustomer.CUSTOMER_GENERAL_DATA.NAME);
    expect(crmCustomer.body.taxId).toBe(sapCustomer.CUSTOMER_GENERAL_DATA.TAX_NUMBER);
  });

  it('order status is synchronized across all systems', async () => {
    const orderId = 'ORD-SYNC-TEST';

    // Create order and wait for propagation
    await api.post('/orders', { orderId, customerId: 'CUST-1000', items: [{ sku: 'MAT-100', qty: 5 }] });
    await sleep(10000); // Allow for async propagation

    const webStatus = (await api.get(`/orders/${orderId}`)).body.status;
    const sapStatus = (await sapClient.call('BAPI_SALESORDER_GETDETAIL', {
      SALESDOCUMENT: orderId
    })).ORDER_HEADER_OUT.DOC_STATUS;
    const wmsStatus = (await wmsApi.get(`/orders/${orderId}`)).body.status;

    // All systems should reflect same logical status
    expect(mapSapStatus(sapStatus)).toBe(webStatus);
    expect(mapWmsStatus(wmsStatus)).toBe(webStatus);
  });
});

describe('Enterprise Test Data Strategy', () => {
  // Master data setup - reusable across test suites
  const masterDataFixture = {
    async setup() {
      // Create customer in SAP (source of truth)
      const customer = await sapClient.call('BAPI_CUSTOMER_CREATE', {
        PI_COPYREFERENCE: { SALESORG: '1000', DISTR_CHAN: '10' },
        PI_PERSONALDATA: { FIRSTNAME: 'Test', LASTNAME: `Customer-${Date.now()}` }
      });
      await sapClient.call('BAPI_TRANSACTION_COMMIT', { WAIT: 'X' });

      // Wait for replication to downstream systems
      await waitFor(async () => {
        const wms = await wmsApi.get(`/customers/${customer.CUSTOMERNO}`);
        return wms.status === 200;
      }, { timeout: 60000 });

      return { customerId: customer.CUSTOMERNO };
    },

    async teardown(customerId) {
      // Mark customer for deletion (SAP does not hard delete)
      await sapClient.call('BAPI_CUSTOMER_CHANGEFROMDATA', {
        CUSTOMERNO: customerId,
        PI_PERSONALDATA: { DELETION_FLAG: 'X' }
      });
      await sapClient.call('BAPI_TRANSACTION_COMMIT', { WAIT: 'X' });
    }
  };

  let testCustomer;

  beforeAll(async () => {
    testCustomer = await masterDataFixture.setup();
  });

  afterAll(async () => {
    await masterDataFixture.teardown(testCustomer.customerId);
  });

  it('uses properly replicated test customer', async () => {
    const order = await api.post('/orders', {
      customerId: testCustomer.customerId,
      items: [{ sku: 'MAT-100', qty: 1 }]
    });
    expect(order.status).toBe(201);
  });
});

// Environment-aware test configuration
const envConfig = {
  INT: {
    sapClient: '300',
    sapHost: 'sap-int.company.com',
    wmsHost: 'wms-int.company.com',
    middlewareHost: 'esb-int.company.com',
    testDataStrategy: 'synthetic', // Create and teardown
    maxParallelTests: 5
  },
  QAS: {
    sapClient: '400',
    sapHost: 'sap-qas.company.com',
    wmsHost: 'wms-qas.company.com',
    middlewareHost: 'esb-qas.company.com',
    testDataStrategy: 'reserved-sets', // Pre-allocated test data
    maxParallelTests: 3
  }
};

function getTestConfig() {
  const env = process.env.TEST_ENVIRONMENT || 'INT';
  return envConfig[env];
}