import path from 'path';
import fs from 'fs';

import mkdirp from 'mkdirp';
import rm from 'rmdir-sync';
import { Logger, ILocalPackageManager, Package } from '@verdaccio/types';

import LocalDriver, { fileExist, fSError, noSuchFile, resourceNotAvailable } from '../src/local-fs';

import pkg from './__fixtures__/pkg';

let localTempStorage: string;
const pkgFileName = 'package.json';

const logger: Logger = {
  error: () => jest.fn(),
  info: () => jest.fn(),
  debug: () => jest.fn(),
  warn: () => jest.fn(),
  child: () => jest.fn(),
  http: () => jest.fn(),
  trace: () => jest.fn(),
};

beforeAll(() => {
  localTempStorage = path.join('./_storage');
  rm(localTempStorage);
});

describe('Local FS test', () => {
  describe('savePackage() group', () => {
    test('savePackage()', (done) => {
      const data = {};
      const localFs = new LocalDriver(path.join(localTempStorage, 'first-package'), logger);

      localFs.savePackage('pkg.1.0.0.tar.gz', data as Package, (err) => {
        expect(err).toBeNull();
        done();
      });
    });
  });

  describe('readPackage() group', () => {
    test('readPackage() success', (done) => {
      const localFs: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/readme-test'), logger);

      localFs.readPackage(pkgFileName, (err) => {
        expect(err).toBeNull();
        done();
      });
    });

    test('readPackage() fails', (done) => {
      const localFs: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/readme-testt'), logger);

      localFs.readPackage(pkgFileName, (err) => {
        expect(err).toBeTruthy();
        done();
      });
    });

    test('readPackage() fails corrupt', (done) => {
      const localFs: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/readme-test-corrupt'), logger);

      localFs.readPackage('corrupt.js', (err) => {
        expect(err).toBeTruthy();
        done();
      });
    });
  });

  describe('createPackage() group', () => {
    test('createPackage()', (done) => {
      const localFs = new LocalDriver(path.join(localTempStorage, 'createPackage'), logger);

      localFs.createPackage(path.join(localTempStorage, 'package5'), pkg, (err) => {
        expect(err).toBeNull();
        done();
      });
    });

    test('createPackage() fails by fileExist', (done) => {
      const localFs = new LocalDriver(path.join(localTempStorage, 'createPackage'), logger);

      localFs.createPackage(path.join(localTempStorage, 'package5'), pkg, (err) => {
        expect(err).not.toBeNull();
        expect(err.code).toBe(fileExist);
        done();
      });
    });

    describe('deletePackage() group', () => {
      test('deletePackage()', (done) => {
        const localFs = new LocalDriver(path.join(localTempStorage, 'createPackage'), logger);

        // verdaccio removes the package.json instead the package name
        localFs.deletePackage('package.json', (err) => {
          expect(err).toBeNull();
          done();
        });
      });
    });
  });

  describe('removePackage() group', () => {
    beforeEach(() => {
      mkdirp.sync(path.join(localTempStorage, '_toDelete'));
    });

    test('removePackage() success', (done) => {
      const localFs: ILocalPackageManager = new LocalDriver(path.join(localTempStorage, '_toDelete'), logger);
      localFs.removePackage((error) => {
        expect(error).toBeNull();
        done();
      });
    });

    test('removePackage() fails', (done) => {
      const localFs: ILocalPackageManager = new LocalDriver(path.join(localTempStorage, '_toDelete_fake'), logger);
      localFs.removePackage((error) => {
        expect(error).toBeTruthy();
        expect(error.code).toBe('ENOENT');
        done();
      });
    });
  });

  describe('readTarball() group', () => {
    test('readTarball() success', (done) => {
      const localFs: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/readme-test'), logger);
      const readTarballStream = localFs.readTarball('test-readme-0.0.0.tgz');

      readTarballStream.on('error', function (err) {
        expect(err).toBeNull();
      });

      readTarballStream.on('content-length', function (content) {
        expect(content).toBe(352);
      });

      readTarballStream.on('end', function () {
        done();
      });

      readTarballStream.on('data', function (data) {
        expect(data).toBeDefined();
      });
    });

    test('readTarball() fails', (done) => {
      const localFs: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/readme-test'), logger);
      const readTarballStream = localFs.readTarball('file-does-not-exist-0.0.0.tgz');

      readTarballStream.on('error', function (err) {
        expect(err).toBeTruthy();
        done();
      });
    });
  });

  describe('writeTarball() group', () => {
    beforeEach(() => {
      const writeTarballFolder: string = path.join(localTempStorage, '_writeTarball');
      rm(writeTarballFolder);
      mkdirp.sync(writeTarballFolder);
    });

    test('writeTarball() success', (done) => {
      const newFileName = 'new-readme-0.0.0.tgz';
      const readmeStorage: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/readme-test'), logger);
      const writeStorage: ILocalPackageManager = new LocalDriver(path.join(__dirname, '../_storage'), logger);
      const readTarballStream = readmeStorage.readTarball('test-readme-0.0.0.tgz');
      const writeTarballStream = writeStorage.writeTarball(newFileName);

      writeTarballStream.on('error', function (err) {
        expect(err).toBeNull();
        done();
      });

      writeTarballStream.on('success', function () {
        const fileLocation: string = path.join(__dirname, '../_storage', newFileName);

        expect(fs.existsSync(fileLocation)).toBe(true);
        done();
      });

      readTarballStream.on('end', function () {
        writeTarballStream.done();
      });

      writeTarballStream.on('end', function () {
        done();
      });

      writeTarballStream.on('data', function (data) {
        expect(data).toBeDefined();
      });

      readTarballStream.on('error', function (err) {
        expect(err).toBeNull();
        done();
      });

      readTarballStream.pipe(writeTarballStream);
    });

    test('writeTarball() abort', (done) => {
      const newFileLocationFolder: string = path.join(localTempStorage, '_writeTarball');
      const newFileName = 'new-readme-abort-0.0.0.tgz';
      const readmeStorage: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/readme-test'), logger);
      const writeStorage: ILocalPackageManager = new LocalDriver(newFileLocationFolder, logger);
      const readTarballStream = readmeStorage.readTarball('test-readme-0.0.0.tgz');
      const writeTarballStream = writeStorage.writeTarball(newFileName);

      writeTarballStream.on('error', function (err) {
        expect(err).toBeTruthy();
        done();
      });

      writeTarballStream.on('data', function (data) {
        expect(data).toBeDefined();
        writeTarballStream.abort();
      });

      readTarballStream.pipe(writeTarballStream);
    });
  });

  describe('updatePackage() group', () => {
    const updateHandler = jest.fn((name, cb) => {
      cb();
    });
    const onWrite = jest.fn((name, data, cb) => {
      cb();
    });
    const transform = jest.fn();

    beforeEach(() => {
      jest.clearAllMocks();
      jest.resetModules();
    });

    test('updatePackage() success', (done) => {
      jest.doMock('@verdaccio/file-locking', () => {
        return {
          readFile: (name, _options, cb): any => cb(null, { name }),
          unlockFile: (_something, cb): any => cb(null),
        };
      });

      const LocalDriver = require('../src/local-fs').default;
      const localFs: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/update-package'), logger);

      localFs.updatePackage('updatePackage', updateHandler, onWrite, transform, () => {
        expect(transform).toHaveBeenCalledTimes(1);
        expect(updateHandler).toHaveBeenCalledTimes(1);
        expect(onWrite).toHaveBeenCalledTimes(1);
        done();
      });
    });

    describe('updatePackage() failures handler', () => {
      test('updatePackage() whether locking fails', (done) => {
        jest.doMock('@verdaccio/file-locking', () => {
          return {
            readFile: (name, _options, cb): any => cb(Error('whateverError'), { name }),
            unlockFile: (_something, cb): any => cb(null),
          };
        });
        require('../src/local-fs').default;
        const localFs: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/update-package'), logger);

        localFs.updatePackage('updatePackage', updateHandler, onWrite, transform, (err) => {
          expect(err).not.toBeNull();
          expect(transform).toHaveBeenCalledTimes(0);
          expect(updateHandler).toHaveBeenCalledTimes(0);
          expect(onWrite).toHaveBeenCalledTimes(0);
          done();
        });
      });

      test('updatePackage() unlock a missing package', (done) => {
        jest.doMock('@verdaccio/file-locking', () => {
          return {
            readFile: (name, _options, cb): any => cb(fSError(noSuchFile, 404), { name }),
            unlockFile: (_something, cb): any => cb(null),
          };
        });
        const LocalDriver = require('../src/local-fs').default;
        const localFs: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/update-package'), logger);

        localFs.updatePackage('updatePackage', updateHandler, onWrite, transform, (err) => {
          expect(err).not.toBeNull();
          expect(transform).toHaveBeenCalledTimes(0);
          expect(updateHandler).toHaveBeenCalledTimes(0);
          expect(onWrite).toHaveBeenCalledTimes(0);
          done();
        });
      });

      test('updatePackage() unlock a resource non available', (done) => {
        jest.doMock('@verdaccio/file-locking', () => {
          return {
            readFile: (name, _options, cb): any => cb(fSError(resourceNotAvailable, 503), { name }),
            unlockFile: (_something, cb): any => cb(null),
          };
        });
        const LocalDriver = require('../src/local-fs').default;
        const localFs: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/update-package'), logger);

        localFs.updatePackage('updatePackage', updateHandler, onWrite, transform, (err) => {
          expect(err).not.toBeNull();
          expect(transform).toHaveBeenCalledTimes(0);
          expect(updateHandler).toHaveBeenCalledTimes(0);
          expect(onWrite).toHaveBeenCalledTimes(0);
          done();
        });
      });

      test('updatePackage() if updateHandler fails', (done) => {
        jest.doMock('@verdaccio/file-locking', () => {
          return {
            readFile: (name, _options, cb): any => cb(null, { name }),
            unlockFile: (_something, cb): any => cb(null),
          };
        });

        const LocalDriver = require('../src/local-fs').default;
        const localFs: ILocalPackageManager = new LocalDriver(path.join(__dirname, '__fixtures__/update-package'), logger);
        const updateHandler = jest.fn((_name, cb) => {
          cb(fSError('something wrong', 500));
        });

        localFs.updatePackage('updatePackage', updateHandler, onWrite, transform, (err) => {
          expect(err).not.toBeNull();
          expect(transform).toHaveBeenCalledTimes(0);
          expect(updateHandler).toHaveBeenCalledTimes(1);
          expect(onWrite).toHaveBeenCalledTimes(0);
          done();
        });
      });
    });
  });
});