einvoice/test/suite/einvoice_edge-cases/test.edge-07.max-field-lengths.ts

import { tap } from '@git.zone/tstest/tapbundle';
import { EInvoice } from '../../../ts/index.js';
import { PerformanceTracker } from '../performance.tracker.js';

tap.test('EDGE-07: Maximum Field Lengths - should handle fields at maximum allowed lengths', async () => {
  // Test 1: Standard field length limits
  await PerformanceTracker.track('standard-field-limits', async () => {
    const fieldTests = [
      { field: 'invoiceId', maxLength: 200, testValue: 'X' },
      { field: 'customerName', maxLength: 200, testValue: 'A' },
      { field: 'streetName', maxLength: 1000, testValue: 'B' },
      { field: 'notes', maxLength: 5000, testValue: 'C' }
    ];
    
    for (const test of fieldTests) {
      const einvoice = new EInvoice();
      einvoice.issueDate = new Date(2024, 0, 1);
      
      // Test at max length
      const maxValue = test.testValue.repeat(test.maxLength);
      
      if (test.field === 'invoiceId') {
        einvoice.invoiceId = maxValue;
      }
      
      einvoice.from = {
        type: 'company',
        name: test.field === 'customerName' ? maxValue : 'Test Company',
        description: 'Testing max field lengths',
        address: {
          streetName: test.field === 'streetName' ? maxValue : 'Test Street',
          houseNumber: '1',
          postalCode: '12345',
          city: 'Test City',
          country: 'DE'
        },
        status: 'active',
        foundedDate: { year: 2020, month: 1, day: 1 },
        registrationDetails: {
          vatId: 'DE123456789',
          registrationId: 'HRB 12345',
          registrationName: 'Commercial Register'
        }
      };
      
      einvoice.to = {
        type: 'company',
        name: 'Customer Company',
        description: 'Customer',
        address: {
          streetName: 'Customer Street',
          houseNumber: '2',
          postalCode: '54321',
          city: 'Customer City',
          country: 'DE'
        },
        status: 'active',
        foundedDate: { year: 2019, month: 1, day: 1 },
        registrationDetails: {
          vatId: 'DE987654321',
          registrationId: 'HRB 54321',
          registrationName: 'Commercial Register'
        }
      };
      
      if (test.field === 'notes') {
        einvoice.notes = [maxValue];
      }
      
      einvoice.items = [{
        position: 1,
        name: 'Test Item',
        articleNumber: 'TEST-001',
        unitType: 'EA',
        unitQuantity: 1,
        unitNetPrice: 100,
        vatPercentage: 19
      }];
      
      try {
        const xmlString = await einvoice.toXmlString('ubl');
        console.log(`Field ${test.field} at max length (${test.maxLength}): XML generated, size: ${xmlString.length} bytes`);
        
        // Test round-trip
        const newInvoice = new EInvoice();
        await newInvoice.fromXmlString(xmlString);
        
        let preserved = false;
        if (test.field === 'invoiceId') {
          preserved = newInvoice.invoiceId === maxValue;
        } else if (test.field === 'customerName') {
          preserved = newInvoice.from.name === maxValue;
        } else if (test.field === 'streetName') {
          preserved = newInvoice.from.address.streetName === maxValue;
        } else if (test.field === 'notes') {
          preserved = newInvoice.notes?.[0] === maxValue;
        }
        
        console.log(`Field ${test.field} preservation: ${preserved ? 'preserved' : 'truncated'}`);
      } catch (error) {
        console.log(`Field ${test.field} at max length failed: ${error.message}`);
      }
      
      // Test over max length
      const overValue = test.testValue.repeat(test.maxLength + 100);
      const overInvoice = new EInvoice();
      overInvoice.issueDate = new Date(2024, 0, 1);
      
      if (test.field === 'invoiceId') {
        overInvoice.invoiceId = overValue;
      }
      
      overInvoice.from = {
        type: 'company',
        name: test.field === 'customerName' ? overValue : 'Test Company',
        description: 'Testing over max field lengths',
        address: {
          streetName: test.field === 'streetName' ? overValue : 'Test Street',
          houseNumber: '1',
          postalCode: '12345',
          city: 'Test City',
          country: 'DE'
        },
        status: 'active',
        foundedDate: { year: 2020, month: 1, day: 1 },
        registrationDetails: {
          vatId: 'DE123456789',
          registrationId: 'HRB 12345',
          registrationName: 'Commercial Register'
        }
      };
      
      overInvoice.to = {
        type: 'person',
        name: 'Test',
        surname: 'Customer',
        salutation: 'Mr' as const,
        sex: 'male' as const,
        title: 'Doctor' as const,
        description: 'Test customer',
        address: {
          streetName: 'Customer Street',
          houseNumber: '2',
          postalCode: '54321',
          city: 'Customer City',
          country: 'DE'
        }
      };
      
      if (test.field === 'notes') {
        overInvoice.notes = [overValue];
      }
      
      overInvoice.items = [{
        position: 1,
        name: 'Test Item',
        articleNumber: 'TEST-001',
        unitType: 'EA',
        unitQuantity: 1,
        unitNetPrice: 100,
        vatPercentage: 19
      }];
      
      try {
        const overXmlString = await overInvoice.toXmlString('ubl');
        console.log(`Field ${test.field} over max length: still generated XML (${overXmlString.length} bytes)`);
      } catch (error) {
        console.log(`Field ${test.field} over max length: properly rejected - ${error.message}`);
      }
    }
  });

  // Test 2: Unicode character length vs byte length
  await PerformanceTracker.track('unicode-length-vs-bytes', async () => {
    const testCases = [
      { name: 'ascii-only', char: 'A', bytesPerChar: 1 },
      { name: 'latin-extended', char: 'ñ', bytesPerChar: 2 },
      { name: 'chinese', char: '中', bytesPerChar: 3 },
      { name: 'emoji', char: '😀', bytesPerChar: 4 }
    ];
    
    const maxChars = 100;
    
    for (const test of testCases) {
      const value = test.char.repeat(maxChars);
      const byteLength = Buffer.from(value, 'utf8').length;
      
      const einvoice = new EInvoice();
      einvoice.issueDate = new Date(2024, 0, 1);
      einvoice.invoiceId = 'UNICODE-TEST';
      
      einvoice.from = {
        type: 'company',
        name: value,
        description: `Unicode test: ${test.name}`,
        address: {
          streetName: 'Unicode Street',
          houseNumber: '1',
          postalCode: '12345',
          city: 'Unicode City',
          country: 'DE'
        },
        status: 'active',
        foundedDate: { year: 2020, month: 1, day: 1 },
        registrationDetails: {
          vatId: 'DE123456789',
          registrationId: 'HRB 12345',
          registrationName: 'Commercial Register'
        }
      };
      
      einvoice.to = {
        type: 'company',
        name: 'Customer Company',
        description: 'Customer',
        address: {
          streetName: 'Customer Street',
          houseNumber: '2',
          postalCode: '54321',
          city: 'Customer City',
          country: 'DE'
        },
        status: 'active',
        foundedDate: { year: 2019, month: 1, day: 1 },
        registrationDetails: {
          vatId: 'DE987654321',
          registrationId: 'HRB 54321',
          registrationName: 'Commercial Register'
        }
      };
      
      einvoice.items = [{
        position: 1,
        name: 'Test Item',
        articleNumber: 'TEST-001',
        unitType: 'EA',
        unitQuantity: 1,
        unitNetPrice: 100,
        vatPercentage: 19
      }];
      
      try {
        const xmlString = await einvoice.toXmlString('cii');
        const newInvoice = new EInvoice();
        await newInvoice.fromXmlString(xmlString);
        
        const retrievedValue = newInvoice.from.name;
        const preserved = retrievedValue === value;
        const retrievedBytes = Buffer.from(retrievedValue, 'utf8').length;
        
        console.log(`Unicode ${test.name}: chars=${value.length}, bytes=${byteLength}, expectedBytes=${maxChars * test.bytesPerChar}`);
        console.log(`  Preserved: ${preserved}, retrieved chars=${retrievedValue.length}, bytes=${retrievedBytes}`);
      } catch (error) {
        console.log(`Unicode ${test.name} failed: ${error.message}`);
      }
    }
  });

  // Test 3: Long invoice numbers
  await PerformanceTracker.track('long-invoice-numbers', async () => {
    const lengths = [50, 100, 200, 500];
    
    for (const length of lengths) {
      const einvoice = new EInvoice();
      einvoice.issueDate = new Date(2024, 0, 1);
      einvoice.invoiceId = 'INV-' + '0'.repeat(length - 4);
      
      einvoice.from = {
        type: 'company',
        name: 'Test Company',
        description: 'Testing long invoice numbers',
        address: {
          streetName: 'Test Street',
          houseNumber: '1',
          postalCode: '12345',
          city: 'Test City',
          country: 'DE'
        },
        status: 'active',
        foundedDate: { year: 2020, month: 1, day: 1 },
        registrationDetails: {
          vatId: 'DE123456789',
          registrationId: 'HRB 12345',
          registrationName: 'Commercial Register'
        }
      };
      
      einvoice.to = {
        type: 'person',
        name: 'Test',
        surname: 'Customer',
        salutation: 'Mr' as const,
        sex: 'male' as const,
        title: 'Doctor' as const,
        description: 'Test customer',
        address: {
          streetName: 'Customer Street',
          houseNumber: '2',
          postalCode: '54321',
          city: 'Customer City',
          country: 'DE'
        }
      };
      
      einvoice.items = [{
        position: 1,
        name: 'Test Item',
        articleNumber: 'TEST-001',
        unitType: 'EA',
        unitQuantity: 1,
        unitNetPrice: 100,
        vatPercentage: 19
      }];
      
      try {
        const xmlString = await einvoice.toXmlString('xrechnung');
        const newInvoice = new EInvoice();
        await newInvoice.fromXmlString(xmlString);
        
        console.log(`Invoice number length ${length}: ${newInvoice.invoiceId.length === length ? 'preserved' : 'modified'}`);
      } catch (error) {
        console.log(`Invoice number length ${length} failed: ${error.message}`);
      }
    }
  });

  // Test 4: Line item count limits
  await PerformanceTracker.track('line-item-count-limits', async () => {
    const itemCounts = [100, 500, 1000];
    
    for (const count of itemCounts) {
      const einvoice = new EInvoice();
      einvoice.issueDate = new Date(2024, 0, 1);
      einvoice.invoiceId = `MANY-ITEMS-${count}`;
      
      einvoice.from = {
        type: 'company',
        name: 'Bulk Seller Company',
        description: 'Testing many line items',
        address: {
          streetName: 'Bulk Street',
          houseNumber: '1',
          postalCode: '12345',
          city: 'Bulk City',
          country: 'DE'
        },
        status: 'active',
        foundedDate: { year: 2020, month: 1, day: 1 },
        registrationDetails: {
          vatId: 'DE123456789',
          registrationId: 'HRB 12345',
          registrationName: 'Commercial Register'
        }
      };
      
      einvoice.to = {
        type: 'company',
        name: 'Bulk Buyer Company',
        description: 'Customer buying many items',
        address: {
          streetName: 'Buyer Street',
          houseNumber: '2',
          postalCode: '54321',
          city: 'Buyer City',
          country: 'DE'
        },
        status: 'active',
        foundedDate: { year: 2019, month: 1, day: 1 },
        registrationDetails: {
          vatId: 'DE987654321',
          registrationId: 'HRB 54321',
          registrationName: 'Commercial Register'
        }
      };
      
      // Create many items
      einvoice.items = [];
      for (let i = 0; i < count; i++) {
        einvoice.items.push({
          position: i + 1,
          name: `Item ${i + 1}`,
          articleNumber: `ART-${String(i + 1).padStart(5, '0')}`,
          unitType: 'EA',
          unitQuantity: 1,
          unitNetPrice: 10 + (i % 100),
          vatPercentage: 19
        });
      }
      
      const startTime = Date.now();
      
      try {
        const xmlString = await einvoice.toXmlString('ubl');
        const endTime = Date.now();
        const timeTaken = endTime - startTime;
        
        const newInvoice = new EInvoice();
        await newInvoice.fromXmlString(xmlString);
        const itemsParsed = newInvoice.items.length;
        
        console.log(`Line items ${count}: parsed=${itemsParsed}, time=${timeTaken}ms, avg=${(timeTaken/count).toFixed(2)}ms/item`);
      } catch (error) {
        console.log(`Line items ${count} failed: ${error.message}`);
      }
    }
  });

  // Test 5: Long email addresses
  await PerformanceTracker.track('long-email-addresses', async () => {
    const emailLengths = [50, 100, 254]; // RFC 5321 limit
    
    for (const length of emailLengths) {
      const localPart = 'x'.repeat(Math.max(1, length - 20));
      const email = localPart + '@example.com';
      
      const einvoice = new EInvoice();
      einvoice.issueDate = new Date(2024, 0, 1);
      einvoice.invoiceId = 'EMAIL-TEST';
      einvoice.electronicAddress = {
        scheme: 'EMAIL',
        value: email.substring(0, length)
      };
      
      einvoice.from = {
        type: 'company',
        name: 'Email Test Company',
        description: 'Testing long email addresses',
        address: {
          streetName: 'Email Street',
          houseNumber: '1',
          postalCode: '12345',
          city: 'Email City',
          country: 'DE'
        },
        status: 'active',
        foundedDate: { year: 2020, month: 1, day: 1 },
        registrationDetails: {
          vatId: 'DE123456789',
          registrationId: 'HRB 12345',
          registrationName: 'Commercial Register'
        }
      };
      
      einvoice.to = {
        type: 'company',
        name: 'Customer Company',
        description: 'Customer',
        address: {
          streetName: 'Customer Street',
          houseNumber: '2',
          postalCode: '54321',
          city: 'Customer City',
          country: 'DE'
        },
        status: 'active',
        foundedDate: { year: 2019, month: 1, day: 1 },
        registrationDetails: {
          vatId: 'DE987654321',
          registrationId: 'HRB 54321',
          registrationName: 'Commercial Register'
        }
      };
      
      einvoice.items = [{
        position: 1,
        name: 'Test Item',
        articleNumber: 'TEST-001',
        unitType: 'EA',
        unitQuantity: 1,
        unitNetPrice: 100,
        vatPercentage: 19
      }];
      
      try {
        const xmlString = await einvoice.toXmlString('ubl');
        const newInvoice = new EInvoice();
        await newInvoice.fromXmlString(xmlString);
        
        const preserved = newInvoice.electronicAddress?.value === email.substring(0, length);
        console.log(`Email length ${length}: ${preserved ? 'preserved' : 'modified'}`);
      } catch (error) {
        console.log(`Email length ${length} failed: ${error.message}`);
      }
    }
  });

  // Test 6: Decimal precision limits
  await PerformanceTracker.track('decimal-precision-limits', async () => {
    const precisionTests = [
      { decimals: 2, value: 12345678901234567890.12 },
      { decimals: 4, value: 123456789012345.1234 },
      { decimals: 6, value: 1234567890.123456 }
    ];
    
    for (const test of precisionTests) {
      const einvoice = new EInvoice();
      einvoice.issueDate = new Date(2024, 0, 1);
      einvoice.invoiceId = 'DECIMAL-TEST';
      
      einvoice.from = {
        type: 'company',
        name: 'Decimal Test Company',
        description: 'Testing decimal precision',
        address: {
          streetName: 'Decimal Street',
          houseNumber: '1',
          postalCode: '12345',
          city: 'Decimal City',
          country: 'DE'
        },
        status: 'active',
        foundedDate: { year: 2020, month: 1, day: 1 },
        registrationDetails: {
          vatId: 'DE123456789',
          registrationId: 'HRB 12345',
          registrationName: 'Commercial Register'
        }
      };
      
      einvoice.to = {
        type: 'person',
        name: 'Test',
        surname: 'Customer',
        salutation: 'Mr' as const,
        sex: 'male' as const,
        title: 'Doctor' as const,
        description: 'Test customer',
        address: {
          streetName: 'Customer Street',
          houseNumber: '2',
          postalCode: '54321',
          city: 'Customer City',
          country: 'DE'
        }
      };
      
      einvoice.items = [{
        position: 1,
        name: 'High Precision Item',
        articleNumber: 'DECIMAL-001',
        unitType: 'EA',
        unitQuantity: 1,
        unitNetPrice: test.value,
        vatPercentage: 19.123456 // Test VAT precision too
      }];
      
      try {
        const xmlString = await einvoice.toXmlString('cii');
        const newInvoice = new EInvoice();
        await newInvoice.fromXmlString(xmlString);
        
        const originalStr = test.value.toString();
        const parsedValue = newInvoice.items[0].unitNetPrice;
        const parsedStr = parsedValue.toString();
        
        console.log(`Decimal precision ${test.decimals}: original=${originalStr}, parsed=${parsedStr}`);
        console.log(`  Preserved: ${parsedValue === test.value}`);
      } catch (error) {
        console.log(`Decimal precision ${test.decimals} failed: ${error.message}`);
      }
    }
  });

  // Test 7: Long postal codes and phone numbers
  await PerformanceTracker.track('postal-codes-phone-numbers', async () => {
    const tests = [
      { field: 'postalCode', lengths: [5, 10, 20] },
      { field: 'phone', lengths: [10, 20, 30] }
    ];
    
    for (const test of tests) {
      for (const length of test.lengths) {
        const einvoice = new EInvoice();
        einvoice.issueDate = new Date(2024, 0, 1);
        einvoice.invoiceId = `${test.field.toUpperCase()}-${length}`;
        
        const value = '1234567890'.repeat(Math.ceil(length / 10)).substring(0, length);
        
        einvoice.from = {
          type: 'company',
          name: 'Field Length Test Company',
          description: `Testing ${test.field} length`,
          address: {
            streetName: 'Test Street',
            houseNumber: '1',
            postalCode: test.field === 'postalCode' ? value : '12345',
            city: 'Test City',
            country: 'DE'
          },
          status: 'active',
          foundedDate: { year: 2020, month: 1, day: 1 },
          registrationDetails: {
            vatId: 'DE123456789',
            registrationId: 'HRB 12345',
            registrationName: 'Commercial Register'
          }
        };
        
        if (test.field === 'phone') {
          (einvoice.from as any).phone = value;
        }
        
        einvoice.to = {
          type: 'company',
          name: 'Customer Company',
          description: 'Customer',
          address: {
            streetName: 'Customer Street',
            houseNumber: '2',
            postalCode: '54321',
            city: 'Customer City',
            country: 'DE'
          },
          status: 'active',
          foundedDate: { year: 2019, month: 1, day: 1 },
          registrationDetails: {
            vatId: 'DE987654321',
            registrationId: 'HRB 54321',
            registrationName: 'Commercial Register'
          }
        };
        
        einvoice.items = [{
          position: 1,
          name: 'Test Item',
          articleNumber: 'TEST-001',
          unitType: 'EA',
          unitQuantity: 1,
          unitNetPrice: 100,
          vatPercentage: 19
        }];
        
        try {
          const xmlString = await einvoice.toXmlString('ubl');
          const newInvoice = new EInvoice();
          await newInvoice.fromXmlString(xmlString);
          
          let preserved = false;
          if (test.field === 'postalCode') {
            preserved = newInvoice.from.address.postalCode === value;
          } else if (test.field === 'phone') {
            preserved = (newInvoice.from as any).phone === value;
          }
          
          console.log(`${test.field} length ${length}: ${preserved ? 'preserved' : 'modified'}`);
        } catch (error) {
          console.log(`${test.field} length ${length} failed: ${error.message}`);
        }
      }
    }
  });

  // Test 8: Performance impact of field lengths
  await PerformanceTracker.track('field-length-performance-impact', async () => {
    const lengths = [10, 100, 1000, 10000];
    const performanceResults = [];
    
    for (const length of lengths) {
      const iterations = 5;
      const times = [];
      
      for (let i = 0; i < iterations; i++) {
        const value = 'X'.repeat(length);
        const einvoice = new EInvoice();
        einvoice.issueDate = new Date(2024, 0, 1);
        einvoice.invoiceId = 'PERF-TEST';
        einvoice.subject = value;
        einvoice.notes = [value, value, value];
        
        einvoice.from = {
          type: 'company',
          name: value.substring(0, 200),
          description: value,
          address: {
            streetName: value.substring(0, 1000),
            houseNumber: '1',
            postalCode: '12345',
            city: 'Test City',
            country: 'DE'
          },
          status: 'active',
          foundedDate: { year: 2020, month: 1, day: 1 },
          registrationDetails: {
            vatId: 'DE123456789',
            registrationId: 'HRB 12345',
            registrationName: 'Commercial Register'
          }
        };
        
        einvoice.to = {
          type: 'company',
          name: 'Customer Company',
          description: 'Customer',
          address: {
            streetName: 'Customer Street',
            houseNumber: '2',
            postalCode: '54321',
            city: 'Customer City',
            country: 'DE'
          },
          status: 'active',
          foundedDate: { year: 2019, month: 1, day: 1 },
          registrationDetails: {
            vatId: 'DE987654321',
            registrationId: 'HRB 54321',
            registrationName: 'Commercial Register'
          }
        };
        
        einvoice.items = [{
          position: 1,
          name: value.substring(0, 500),
          articleNumber: 'TEST-001',
          unitType: 'EA',
          unitQuantity: 1,
          unitNetPrice: 100,
          vatPercentage: 19
        }];
        
        const startTime = process.hrtime.bigint();
        
        try {
          await einvoice.toXmlString('ubl');
        } catch (error) {
          // Ignore errors for performance testing
        }
        
        const endTime = process.hrtime.bigint();
        times.push(Number(endTime - startTime) / 1000000); // Convert to ms
      }
      
      const avgTime = times.reduce((a, b) => a + b, 0) / times.length;
      performanceResults.push({
        fieldLength: length,
        avgParseTime: avgTime,
        timePerKB: avgTime / (length * 5 / 1024) // 5 fields with this length
      });
      
      console.log(`Field length ${length}: avg time=${avgTime.toFixed(2)}ms, per KB=${(avgTime / (length * 5 / 1024)).toFixed(2)}ms`);
    }
    
    // Check performance scaling
    for (let i = 1; i < performanceResults.length; i++) {
      const ratio = performanceResults[i].avgParseTime / performanceResults[i-1].avgParseTime;
      const lengthRatio = performanceResults[i].fieldLength / performanceResults[i-1].fieldLength;
      console.log(`Performance scaling ${performanceResults[i-1].fieldLength}→${performanceResults[i].fieldLength}: time ratio=${ratio.toFixed(2)}, length ratio=${lengthRatio}`);
    }
  });
});

// Run the test
tap.start();