import { tap, expect } from '@git.zone/tstest/tapbundle';
import { PeppolValidator } from '../ts/formats/validation/peppol.validator.js';
import type { EInvoice } from '../ts/einvoice.js';

tap.test('PEPPOL Validator - basic instantiation', async () => {
  const validator = PeppolValidator.create();
  expect(validator).toBeInstanceOf(PeppolValidator);
  
  // Singleton pattern
  const validator2 = PeppolValidator.create();
  expect(validator2).toEqual(validator);
});

tap.test('PEPPOL Validator - endpoint ID validation', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        sellerEndpointId: '0088:1234567890128', // Valid GLN
        buyerEndpointId: '0192:123456789' // Valid Norwegian org
      }
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const endpointErrors = results.filter(r => r.ruleId.startsWith('PEPPOL-T00'));
  
  console.log('Endpoint validation results:', endpointErrors);
  expect(endpointErrors.length).toEqual(0);
});

tap.test('PEPPOL Validator - invalid GLN endpoint', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        sellerEndpointId: '0088:123456789012', // Invalid GLN (wrong check digit)
      }
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const endpointErrors = results.filter(r => r.ruleId === 'PEPPOL-T001');
  
  expect(endpointErrors.length).toBeGreaterThan(0);
  expect(endpointErrors[0].message).toInclude('Invalid seller endpoint ID');
});

tap.test('PEPPOL Validator - invalid endpoint format', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        sellerEndpointId: 'invalid-format', // No scheme
      }
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const endpointErrors = results.filter(r => r.ruleId === 'PEPPOL-T001');
  
  expect(endpointErrors.length).toBeGreaterThan(0);
  expect(endpointErrors[0].severity).toEqual('error');
});

tap.test('PEPPOL Validator - document type validation', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        documentTypeId: 'urn:oasis:names:specification:ubl:schema:xsd:Invoice-2::Invoice##urn:cen.eu:en16931:2017#compliant#urn:fdc:peppol.eu:2017:poacc:billing:3.0::2.1'
      }
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const docTypeErrors = results.filter(r => r.ruleId === 'PEPPOL-T003');
  
  expect(docTypeErrors.length).toEqual(0);
});

tap.test('PEPPOL Validator - process ID validation', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        processId: 'urn:fdc:peppol.eu:2017:poacc:billing:01:1.0'
      }
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const processErrors = results.filter(r => r.ruleId === 'PEPPOL-T004');
  
  expect(processErrors.length).toEqual(0);
});

tap.test('PEPPOL Validator - invalid process ID', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        processId: 'invalid:process:id'
      }
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const processErrors = results.filter(r => r.ruleId === 'PEPPOL-T004');
  
  expect(processErrors.length).toBeGreaterThan(0);
  expect(processErrors[0].severity).toEqual('warning');
});

tap.test('PEPPOL Validator - business rules', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      // Missing both buyer reference and purchase order reference
    },
    from: {
      type: 'company',
      name: 'Test Company'
      // Missing email
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  
  // Should have error for missing buyer reference
  const buyerRefErrors = results.filter(r => r.ruleId === 'PEPPOL-B-01');
  expect(buyerRefErrors.length).toBeGreaterThan(0);
  
  // Should have warning for missing seller email
  const emailWarnings = results.filter(r => r.ruleId === 'PEPPOL-B-02');
  expect(emailWarnings.length).toBeGreaterThan(0);
});

tap.test('PEPPOL Validator - buyer reference present', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      buyerReference: 'REF-12345'
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const buyerRefErrors = results.filter(r => r.ruleId === 'PEPPOL-B-01');
  
  expect(buyerRefErrors.length).toEqual(0);
});

tap.test('PEPPOL Validator - purchase order reference present', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        purchaseOrderReference: 'PO-2025-001'
      }
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const buyerRefErrors = results.filter(r => r.ruleId === 'PEPPOL-B-01');
  
  expect(buyerRefErrors.length).toEqual(0);
});

tap.test('PEPPOL Validator - payment means validation', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        paymentMeans: {
          paymentMeansCode: '30' // Valid code for credit transfer
        }
      }
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const paymentErrors = results.filter(r => r.ruleId === 'PEPPOL-B-04');
  
  expect(paymentErrors.length).toEqual(0);
});

tap.test('PEPPOL Validator - invalid payment means', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        paymentMeans: {
          paymentMeansCode: '999' // Invalid code
        }
      }
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const paymentErrors = results.filter(r => r.ruleId === 'PEPPOL-B-04');
  
  expect(paymentErrors.length).toBeGreaterThan(0);
  expect(paymentErrors[0].severity).toEqual('error');
});

tap.test('PEPPOL Validator - non-PEPPOL invoice skips validation', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:cen.eu:en16931:2017', // Not PEPPOL
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  
  expect(results.length).toEqual(0);
});

tap.test('PEPPOL Validator - scheme ID validation', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        buyerPartyId: {
          schemeId: '0088', // Valid GLN scheme
          id: '1234567890128'
        }
      }
    },
    from: {
      type: 'company',
      name: 'Test Company',
      registrationDetails: {
        partyIdentification: {
          schemeId: '9906', // Valid IT:VAT scheme
          id: 'IT12345678901'
        }
      }
    } as any
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const schemeErrors = results.filter(r => 
    r.ruleId === 'PEPPOL-T005' || r.ruleId === 'PEPPOL-T006'
  );
  
  expect(schemeErrors.length).toEqual(0);
});

tap.test('PEPPOL Validator - invalid scheme ID', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        buyerPartyId: {
          schemeId: '9999', // Invalid scheme
          id: '12345'
        }
      }
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  const schemeErrors = results.filter(r => r.ruleId === 'PEPPOL-T006');
  
  expect(schemeErrors.length).toBeGreaterThan(0);
  expect(schemeErrors[0].severity).toEqual('warning');
});

tap.test('PEPPOL Validator - B2G detection', async () => {
  const validator = PeppolValidator.create();
  
  const invoice: Partial<EInvoice> = {
    metadata: {
      profileId: 'urn:fdc:peppol.eu:2017:poacc:billing:3.0',
      extensions: {
        buyerPartyId: {
          schemeId: '0204', // German government Leitweg-ID
          id: '991-12345-01'
        },
        buyerCategory: 'government'
      }
    },
    to: {
      type: 'company',
      name: 'Government Agency'
    }
  };
  
  const results = validator.validatePeppol(invoice as EInvoice);
  
  // B2G should require endpoint IDs
  const endpointErrors = results.filter(r => 
    r.ruleId === 'PEPPOL-T001' || r.ruleId === 'PEPPOL-T002'
  );
  
  expect(endpointErrors.length).toBeGreaterThan(0);
  expect(endpointErrors[0].message).toInclude('mandatory for PEPPOL B2G');
});

export default tap.start();