import path from 'path';
import nock from 'nock';
import { Config, parseConfigFile } from '@verdaccio/config';
import { API_ERROR, HEADER_TYPE, HTTP_STATUS, VerdaccioError, errorUtils } from '@verdaccio/core';
import { ProxyStorage } from '../src/up-storage';

const getConf = (name) => path.join(__dirname, '/conf', name);

const mockDebug = jest.fn();
const mockInfo = jest.fn();
const mockHttp = jest.fn();
const mockError = jest.fn();
const mockWarn = jest.fn();
jest.mock('@verdaccio/logger', () => {
  const originalLogger = jest.requireActual('@verdaccio/logger');
  return {
    ...originalLogger,
    logger: {
      child: () => ({
        debug: (arg) => mockDebug(arg),
        info: (arg) => mockInfo(arg),
        http: (arg) => mockHttp(arg),
        error: (arg) => mockError(arg),
        warn: (arg) => mockWarn(arg),
      }),
    },
  };
});

const domain = 'https://registry.npmjs.org';

describe('proxy', () => {
  beforeEach(() => {
    nock.cleanAll();
  });
  const defaultRequestOptions = {
    url: 'https://registry.npmjs.org',
  };
  const proxyPath = getConf('proxy1.yaml');
  const conf = new Config(parseConfigFile(proxyPath));

  describe('error handling', () => {
    test('should be offline uplink', (done) => {
      const tarball = 'https://registry.npmjs.org/jquery/-/jquery-0.0.1.tgz';
      nock(domain).get('/jquery/-/jquery-0.0.1.tgz').times(100).replyWithError('some error');
      const proxy = new ProxyStorage(defaultRequestOptions, conf);
      const stream = proxy.fetchTarball(tarball);
      // to test a uplink is offline we have to be try 3 times
      // the default failed request are set to 2
      process.nextTick(function () {
        stream.on('error', function (err) {
          expect(err).not.toBeNull();
          // expect(err.statusCode).toBe(404);
          expect(proxy.failed_requests).toBe(1);

          const streamSecondTry = proxy.fetchTarball(tarball);
          streamSecondTry.on('error', function (err) {
            expect(err).not.toBeNull();
            /*
                  code: 'ENOTFOUND',
                  errno: 'ENOTFOUND',
                 */
            // expect(err.statusCode).toBe(404);
            expect(proxy.failed_requests).toBe(2);
            const streamThirdTry = proxy.fetchTarball(tarball);
            streamThirdTry.on('error', function (err: VerdaccioError) {
              expect(err).not.toBeNull();
              expect(err.statusCode).toBe(HTTP_STATUS.INTERNAL_ERROR);
              expect(proxy.failed_requests).toBe(2);
              expect(err.message).toMatch(API_ERROR.UPLINK_OFFLINE);
              done();
            });
          });
        });
      });
    });

    test('not found tarball', (done) => {
      nock(domain).get('/jquery/-/jquery-0.0.1.tgz').reply(404);
      const prox1 = new ProxyStorage(defaultRequestOptions, conf);
      const stream = prox1.fetchTarball('https://registry.npmjs.org/jquery/-/jquery-0.0.1.tgz');
      stream.on('error', (response) => {
        expect(response).toEqual(errorUtils.getNotFound(API_ERROR.NOT_FILE_UPLINK));
        done();
      });
    });

    test('fail tarball request', (done) => {
      nock(domain).get('/jquery/-/jquery-0.0.1.tgz').replyWithError('boom file');
      const prox1 = new ProxyStorage(defaultRequestOptions, conf);
      const stream = prox1.fetchTarball('https://registry.npmjs.org/jquery/-/jquery-0.0.1.tgz');
      stream.on('error', (response) => {
        expect(response).toEqual(Error('boom file'));
        done();
      });
    });

    test('bad uplink request', (done) => {
      nock(domain).get('/jquery/-/jquery-0.0.1.tgz').reply(409);
      const prox1 = new ProxyStorage(defaultRequestOptions, conf);
      const stream = prox1.fetchTarball('https://registry.npmjs.org/jquery/-/jquery-0.0.1.tgz');
      stream.on('error', (response) => {
        expect(response).toEqual(errorUtils.getInternalError(`bad uplink status code: 409`));
        done();
      });
    });

    test('content length header mismatch', (done) => {
      nock(domain)
        .get('/jquery/-/jquery-0.0.1.tgz')
        // types does not match here with documentation
        // @ts-expect-error
        .replyWithFile(201, path.join(__dirname, 'partials/jquery-0.0.1.tgz'), {
          [HEADER_TYPE.CONTENT_LENGTH]: 0,
        });
      const prox1 = new ProxyStorage(defaultRequestOptions, conf);
      const stream = prox1.fetchTarball('https://registry.npmjs.org/jquery/-/jquery-0.0.1.tgz');
      stream.on('error', (response) => {
        expect(response).toEqual(errorUtils.getInternalError(API_ERROR.CONTENT_MISMATCH));
        done();
      });
    });
  });
});