import { describe, it } from 'node:test';
import assert from 'node:assert/strict';
import { CyberCoreSigner } from '../src/signer-sdk.js';
import {
  CyberCoreError,
  UserCancelledError,
  CertificateNotFoundError,
  PinIncorrectError,
  TokenNotFoundError,
  ApplicationNotAuthorizedError
} from '../src/errors.js';

describe('@cybercore/signer-sdk - Testes Unitários do SDK', () => {

  it('deve inicializar com parâmetros padrões e gerar UUID de aplicação', () => {
    const signer = new CyberCoreSigner();
    assert.equal(signer.baseUrl, 'http://127.0.0.1:21325');
    assert.ok(signer.applicationId);
    assert.equal(typeof signer.applicationId, 'string');
    assert.equal(signer.applicationName, 'Aplicação Web');
  });

  it('deve respeitar configurações customizadas no construtor', () => {
    const customAppId = '12345678-1234-1234-1234-123456789012';
    const signer = new CyberCoreSigner({
      baseUrl: 'http://127.0.0.1:21325/',
      applicationId: customAppId,
      applicationName: 'Portal Minha Empresa'
    });

    assert.equal(signer.baseUrl, 'http://127.0.0.1:21325');
    assert.equal(signer.applicationId, customAppId);
    assert.equal(signer.applicationName, 'Portal Minha Empresa');
  });

  it('deve retornar as capacidades criptográficas do agente em getCapabilities()', async () => {
    const signer = new CyberCoreSigner();
    const caps = await signer.getCapabilities();

    assert.equal(caps.protocolVersion, '1');
    assert.ok(Array.isArray(caps.supportedAlgorithms));
    assert.ok(caps.supportedAlgorithms.includes('SHA256withRSA'));
    assert.ok(caps.certificateTypes.includes('A1'));
    assert.ok(caps.certificateTypes.includes('A3'));
  });

  it('deve calcular hash SHA-256 com precisão criptográfica no browser/node', async () => {
    const signer = new CyberCoreSigner();
    const texto = 'CyberCore Signer 2026';
    const hashBase64 = await signer._calculateSha256(texto);

    assert.ok(hashBase64);
    assert.equal(typeof hashBase64, 'string');
    // Deve decodificar para 32 bytes (256 bits)
    const rawBytes = Buffer.from(hashBase64, 'base64');
    assert.equal(rawBytes.length, 32);
  });

  it('deve mapear códigos de erro estruturados CCSP para classes específicas', () => {
    const signer = new CyberCoreSigner();

    assert.throws(
      () => signer._throwMappedError('USER_CANCELLED', 'Operação cancelada'),
      UserCancelledError
    );

    assert.throws(
      () => signer._throwMappedError('CERTIFICATE_NOT_FOUND', 'Não encontrado'),
      CertificateNotFoundError
    );

    assert.throws(
      () => signer._throwMappedError('PIN_INCORRECT', 'PIN errado'),
      PinIncorrectError
    );

    assert.throws(
      () => signer._throwMappedError('TOKEN_NOT_FOUND', 'Sem token'),
      TokenNotFoundError
    );

    assert.throws(
      () => signer._throwMappedError('APPLICATION_NOT_AUTHORIZED', 'Não autorizada'),
      ApplicationNotAuthorizedError
    );

    assert.throws(
      () => signer._throwMappedError('OUTRO_ERRO', 'Erro genérico'),
      CyberCoreError
    );
  });

  it('deve validar parâmetros obrigatórios no método sign()', async () => {
    const signer = new CyberCoreSigner();

    await assert.rejects(
      async () => signer.sign(null),
      { name: 'CyberCoreError', code: 'BAD_REQUEST' }
    );

    await assert.rejects(
      async () => signer.sign({ certificateId: null }),
      { name: 'CertificateNotFoundError' }
    );

    await assert.rejects(
      async () => signer.sign({ certificateId: 'cert-1' }),
      { name: 'CyberCoreError', code: 'BAD_REQUEST' }
    );
  });

  it('deve validar integridade básica na verificação de assinatura em verify()', async () => {
    const signer = new CyberCoreSigner();

    // Inválido por falta de campos
    const invalidEmpty = await signer.verify({});
    assert.equal(invalidEmpty, false);

    // Válido com 32 bytes de digest e assinatura Base64
    const fakeDigest32 = Buffer.alloc(32, 1).toString('base64');
    const fakeSig256 = Buffer.alloc(256, 2).toString('base64');
    const fakeCert = Buffer.alloc(100, 3).toString('base64');

    const valid = await signer.verify({
      digest: fakeDigest32,
      signature: fakeSig256,
      certificate: fakeCert
    });
    assert.equal(valid, true);
  });

  it('deve extrair dados do titular com extractSubjectInfo()', () => {
    const signer = new CyberCoreSigner();

    // Simula uma string binária DER contendo padrão ICP-Brasil "MARCOS DA SILVA:12345678909"
    const sampleCertDer = Buffer.from('Prefix_CN=MARCOS DA SILVA:12345678909,OU=ICP-Brasil_Suffix');
    const b64 = sampleCertDer.toString('base64');

    const info = signer.extractSubjectInfo(b64);
    assert.equal(info.name, 'MARCOS DA SILVA');
    assert.equal(info.cpfCnpj, '12345678909');
  });

  it('deve exigir arquivo válido em signFile()', async () => {
    const signer = new CyberCoreSigner();
    await assert.rejects(
      async () => signer.signFile(null),
      { name: 'CyberCoreError', code: 'BAD_REQUEST' }
    );
  });

  it('deve exigir certificado em authenticate()', async () => {
    const signer = new CyberCoreSigner();
    await assert.rejects(
      async () => signer.authenticate({}),
      { name: 'CertificateNotFoundError' }
    );
  });

  it('deve preparar payload de PDF com document_type PDF em signPdf()', async () => {
    const signer = new CyberCoreSigner();
    const fakePdfBytes = Buffer.from('%PDF-1.4 ... dados de teste ... %%EOF');

    // Mock do método _fetch interno para validar a montagem do payload
    let capturedPayload = null;
    signer._fetch = async (endpoint, options) => {
      capturedPayload = JSON.parse(options.body);
      return {
        status: 'signed',
        request_id: capturedPayload.request_id,
        signature: 'MEUCIQ...base64...',
        certificate: 'MII...base64...',
        algorithm: 'SHA256withRSA',
        document_name: capturedPayload.document_name,
        document_type: capturedPayload.document_type
      };
    };

    const res = await signer.signPdf(fakePdfBytes, {
      certificateId: 'cert-1',
      documentName: 'contrato_locacao.pdf'
    });

    assert.equal(res.status, 'signed');
    assert.equal(res.documentName, 'contrato_locacao.pdf');
    assert.equal(res.documentType, 'PDF');
    assert.ok(capturedPayload.digest);
    assert.equal(capturedPayload.document_type, 'PDF');
  });

  it('deve preparar assinatura de XML com digest do conteúdo em signXml()', async () => {
    const signer = new CyberCoreSigner();
    const xmlContent = '<nfeProc versao="4.00"><NFe><infNFe Id="NFe3524..."></infNFe></NFe></nfeProc>';

    let capturedPayload = null;
    signer._fetch = async (endpoint, options) => {
      capturedPayload = JSON.parse(options.body);
      return {
        status: 'signed',
        request_id: capturedPayload.request_id,
        signature: 'MEUCIQ...base64...',
        certificate: 'MII...base64...',
        algorithm: 'SHA256withRSA',
        document_name: capturedPayload.document_name,
        document_type: capturedPayload.document_type
      };
    };

    const res = await signer.signXml(xmlContent, {
      certificateId: 'cert-1',
      documentName: 'nfe-3524.xml'
    });

    assert.equal(res.status, 'signed');
    assert.equal(res.documentType, 'XML');
    assert.equal(capturedPayload.document_name, 'nfe-3524.xml');
    assert.ok(capturedPayload.digest);
  });

  it('deve realizar autenticação / login digital com endpoint /authenticate', async () => {
    const signer = new CyberCoreSigner();

    let capturedPayload = null;
    let calledEndpoint = null;

    signer._fetch = async (endpoint, options) => {
      calledEndpoint = endpoint;
      capturedPayload = JSON.parse(options.body);
      const fakeCertB64 = Buffer.from('CN=DOUTOR SILVA:98765432100').toString('base64');
      return {
        status: 'authenticated',
        request_id: capturedPayload.request_id,
        signature: 'SIG_AUTH_BASE64',
        certificate: fakeCertB64,
        algorithm: 'SHA256withRSA',
        subject_name: 'DOUTOR SILVA',
        subject_cpf_cnpj: '98765432100'
      };
    };

    const res = await signer.authenticate({
      certificateId: 'token-oab-1',
      challenge: 'server-login-nonce-xyz-2026'
    });

    assert.equal(calledEndpoint, '/ccsp/v1/authenticate');
    assert.equal(res.status, 'authenticated');
    assert.equal(res.challenge, 'server-login-nonce-xyz-2026');
    assert.equal(res.subjectName, 'DOUTOR SILVA');
    assert.equal(res.subjectCpfCnpj, '98765432100');
    assert.equal(capturedPayload.purpose, 'AUTHENTICATION');
  });
});