import path from 'path';
import rimRaf from 'rimraf';
import { dirSync } from 'tmp-promise';

import { Config as AppConfig } from '@verdaccio/config';
import { logger, setup } from '@verdaccio/logger';
import { configExample, generateNewVersion } from '@verdaccio/mock';

const readMetadata = (fileName = 'metadata') => readFile(`../fixtures/${fileName}`).toString();
import { Config, MergeTags, Package } from '@verdaccio/types';
import { API_ERROR, HTTP_STATUS, DIST_TAGS } from '@verdaccio/commons-api';
import { VerdaccioError } from '@verdaccio/commons-api';
import { LocalStorage, PROTO_NAME } from '../src/local-storage';
import { generatePackageTemplate } from '../src/storage-utils';
import { readFile } from './fixtures/test.utils';

setup([]);

describe('LocalStorage', () => {
  let storage: LocalStorage;
  const pkgName = 'npm_test';
  const pkgNameScoped = `@scope/${pkgName}-scope`;
  const tarballName = `${pkgName}-add-tarball-1.0.4.tgz`;
  const tarballName2 = `${pkgName}-add-tarball-1.0.5.tgz`;

  const getStorage = (tmpFolder, LocalStorageClass = LocalStorage) => {
    const config: Config = new AppConfig(
      configExample({
        config_path: path.join(tmpFolder.name, 'storage'),
      })
    );

    return new LocalStorageClass(config, logger);
  };

  const getPackageMetadataFromStore = (pkgName: string): Promise<Package> => {
    return new Promise((resolve) => {
      storage.getPackageMetadata(pkgName, (err, data) => {
        resolve(data);
      });
    });
  };

  const addNewVersion = (pkgName: string, version: string) => {
    return new Promise((resolve) => {
      storage.addVersion(
        pkgName,
        version,
        generateNewVersion(pkgName, version),
        '',
        (_err, data) => {
          if (_err) {
            throw new Error(`Error adding new version: ${_err}`);
          }
          resolve(data);
        }
      );
    });
  };
  const addTarballToStore = (pkgName: string, tarballName: string) => {
    return new Promise((resolve, reject) => {
      const tarballData = JSON.parse(readMetadata('addTarball').toString());
      const stream = storage.addTarball(pkgName, tarballName);

      stream.on('error', (err) => {
        reject(err);
      });
      stream.on('success', () => {
        resolve(true);
      });

      stream.end(Buffer.from(tarballData.data, 'base64'));
      stream.done();
    });
  };

  const addPackageToStore = (pkgName, metadata) => {
    return new Promise((resolve, reject) => {
      // @ts-ignore
      const pkgStoragePath = storage._getLocalStorage(pkgName);
      // @ts-expect-error
      rimRaf(pkgStoragePath.path, (err) => {
        expect(err).toBeNull();
        storage.addPackage(pkgName, metadata, async (err, data) => {
          if (err) {
            reject(err);
          }

          resolve(data);
        });
      });
    });
  };

  let tmpFolder;

  beforeEach(async () => {
    // FIXME: remove tmp folder on afterEach
    tmpFolder = dirSync({ unsafeCleanup: true });
    storage = getStorage(tmpFolder);
    await storage.init();
  });

  describe('LocalStorage::preparePackage', () => {
    test('should add a package', (done) => {
      const metadata = JSON.parse(readMetadata().toString());
      // @ts-ignore
      const pkgStoragePath = storage._getLocalStorage(pkgName);
      // @ts-expect-error
      rimRaf(pkgStoragePath.path, (err) => {
        expect(err).toBeNull();
        storage.addPackage(pkgName, metadata, (_err, data) => {
          expect(data.version).toMatch(/1.0.0/);
          expect(data.dist.tarball).toMatch(/npm_test-1.0.0.tgz/);
          expect(data.name).toEqual(pkgName);
          done();
        });
      });
    });

    test('should add a @scope package', (done) => {
      const metadata = JSON.parse(readMetadata());
      // @ts-ignore
      const pkgStoragePath = storage._getLocalStorage(pkgNameScoped);
      // @ts-expect-error
      rimRaf(pkgStoragePath.path, (err) => {
        expect(err).toBeNull();
        storage.addPackage(pkgNameScoped, metadata, (err, data) => {
          expect(err).toBeNull();
          expect(data.version).toMatch(/1.0.0/);
          expect(data.dist.tarball).toMatch(/npm_test-1.0.0.tgz/);
          expect(data.name).toEqual(pkgName);
          done();
        });
      });
    });

    test('should fails on add a package', async () => {
      const metadata = JSON.parse(readMetadata());
      await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
      return new Promise((resolve) => {
        storage.addPackage(pkgName, metadata, (err) => {
          expect(err).not.toBeNull();
          expect(err.statusCode).toEqual(HTTP_STATUS.CONFLICT);
          expect(err.message).toMatch(API_ERROR.PACKAGE_EXIST);
          resolve(true);
        });
      });
    });

    describe('LocalStorage::mergeTags', () => {
      test('should mergeTags', async () => {
        const pkgName = 'merge-tags-test-1';
        await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
        await addNewVersion(pkgName, '1.0.0');
        await addNewVersion(pkgName, '2.0.0');
        await addNewVersion(pkgName, '3.0.0');
        const tags: MergeTags = {
          beta: '3.0.0',
          latest: '2.0.0',
        };

        return new Promise((resolve) => {
          storage.mergeTags(pkgName, tags, async (err, data) => {
            expect(err).toBeNull();
            expect(data).toBeUndefined();
            const metadata: Package = await getPackageMetadataFromStore(pkgName);
            expect(metadata[DIST_TAGS]).toBeDefined();
            expect(metadata[DIST_TAGS]['beta']).toBeDefined();
            expect(metadata[DIST_TAGS]['beta']).toBe('3.0.0');
            expect(metadata[DIST_TAGS]['latest']).toBe('2.0.0');
            resolve(data);
          });
        });
      });

      test('should fails mergeTags version not found', async () => {
        const pkgName = 'merge-tags-test-1';
        await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
        // const tarballName: string = `${pkgName}-${version}.tgz`;
        await addNewVersion(pkgName, '1.0.0');
        await addNewVersion(pkgName, '2.0.0');
        await addNewVersion(pkgName, '3.0.0');
        const tags: MergeTags = {
          beta: '9999.0.0',
        };

        return new Promise((resolve) => {
          storage.mergeTags(pkgName, tags, async (err) => {
            expect(err).not.toBeNull();
            expect(err.statusCode).toEqual(HTTP_STATUS.NOT_FOUND);
            expect(err.message).toMatch(API_ERROR.VERSION_NOT_EXIST);
            resolve(tags);
          });
        });
      });

      test('should fails on mergeTags', (done) => {
        const tags: MergeTags = {
          beta: '3.0.0',
          latest: '2.0.0',
        };

        storage.mergeTags('not-found', tags, (err) => {
          expect(err).not.toBeNull();
          expect(err.statusCode).toEqual(HTTP_STATUS.NOT_FOUND);
          expect(err.message).toMatch(API_ERROR.NO_PACKAGE);
          done();
        });
      });
    });

    describe('LocalStorage::addVersion', () => {
      test('should add new version without tag', async () => {
        const pkgName = 'add-version-test-1';
        const version = '1.0.1';
        await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
        const tarballName = `${pkgName}-${version}.tgz`;
        await addNewVersion(pkgName, '9.0.0');
        await addTarballToStore(pkgName, `${pkgName}-9.0.0.tgz`);
        await addTarballToStore(pkgName, tarballName);

        return new Promise((resolve) => {
          storage.addVersion(
            pkgName,
            version,
            generateNewVersion(pkgName, version),
            '',
            (err, data) => {
              expect(err).toBeNull();
              expect(data).toBeUndefined();
              resolve(data);
            }
          );
        });
      });

      test('should fails on add a duplicated version without tag', async () => {
        const pkgName = 'add-version-test-2';
        const version = '1.0.1';
        await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
        await addNewVersion(pkgName, version);

        return new Promise((resolve) => {
          storage.addVersion(pkgName, version, generateNewVersion(pkgName, version), '', (err) => {
            expect(err).not.toBeNull();
            expect(err.statusCode).toEqual(HTTP_STATUS.CONFLICT);
            expect(err.message).toMatch(API_ERROR.PACKAGE_EXIST);
            resolve(err);
          });
        });
      });

      test('should fails add new version wrong shasum', async () => {
        const pkgName = 'add-version-test-4';
        const version = '4.0.0';
        await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
        const tarballName = `${pkgName}-${version}.tgz`;
        await addTarballToStore(pkgName, tarballName);

        return new Promise((resolve) => {
          storage.addVersion(
            pkgName,
            version,
            generateNewVersion(pkgName, version, 'fake'),
            '',
            (err) => {
              expect(err).not.toBeNull();
              expect(err.statusCode).toEqual(HTTP_STATUS.BAD_REQUEST);
              expect(err.message).toMatch(/shasum error/);
              resolve(err);
            }
          );
        });
      });

      test('should add new second version without tag', async () => {
        const pkgName = 'add-version-test-3';
        const version = '1.0.2';
        await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
        await addNewVersion(pkgName, '1.0.1');
        await addNewVersion(pkgName, '1.0.3');
        return new Promise((resolve) => {
          storage.addVersion(
            pkgName,
            version,
            generateNewVersion(pkgName, version),
            'beta',
            (err, data) => {
              expect(err).toBeNull();
              expect(data).toBeUndefined();
              resolve(data);
            }
          );
        });
      });
    });

    describe('LocalStorage::updateVersions', () => {
      const metadata = JSON.parse(readMetadata('metadata-update-versions-tags'));
      const pkgName = 'add-update-versions-test-1';
      const version = '1.0.2';
      let _storage;
      beforeEach(async () => {
        const tmpFolder = dirSync({ unsafeCleanup: true });
        class MockLocalStorage extends LocalStorage {}
        // @ts-ignore
        MockLocalStorage.prototype._writePackage = jest.fn(LocalStorage.prototype._writePackage);
        _storage = getStorage(tmpFolder, MockLocalStorage);
        await _storage.init();
        return new Promise((resolve) => {
          // @ts-expect-error
          rimRaf(path.join(configExample().storage, pkgName), async () => {
            await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
            await addNewVersion(pkgName, '1.0.1');
            await addNewVersion(pkgName, version);
            resolve(pkgName);
          });
        });
      });

      test('should update versions from external source', (done) => {
        _storage.updateVersions(pkgName, metadata, (err, data) => {
          expect(err).toBeNull();
          expect(_storage._writePackage).toHaveBeenCalledTimes(1);
          expect(data.versions['1.0.1']).toBeDefined();
          expect(data.versions[version]).toBeDefined();
          expect(data.versions['1.0.4']).toBeDefined();
          expect(data[DIST_TAGS]['latest']).toBeDefined();
          expect(data[DIST_TAGS]['latest']).toBe('1.0.1');
          expect(data[DIST_TAGS]['beta']).toBeDefined();
          expect(data[DIST_TAGS]['beta']).toBe('1.0.2');
          expect(data[DIST_TAGS]['next']).toBeDefined();
          expect(data[DIST_TAGS]['next']).toBe('1.0.4');
          expect(data['_rev'] === metadata['_rev']).toBeFalsy();
          expect(data.readme).toBe('readme 1.0.4');
          done();
        });
      });

      test('should not update if the metadata match', (done) => {
        _storage.updateVersions(pkgName, metadata, (e) => {
          expect(e).toBeNull();
          _storage.updateVersions(pkgName, metadata, (err) => {
            expect(err).toBeNull();
            expect(_storage._writePackage).toHaveBeenCalledTimes(1);
            done();
          });
        });
      });
    });

    describe('LocalStorage::changePackage', () => {
      const pkgName = 'change-package';

      test('should unpublish a version', async () => {
        await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
        await addNewVersion(pkgName, '1.0.1');
        await addNewVersion(pkgName, '1.0.2');
        await addNewVersion(pkgName, '1.0.3');
        const metadata = JSON.parse(readMetadata('changePackage/metadata-change'));
        const rev: string = metadata['_rev'];

        return new Promise((resolve) => {
          storage.changePackage(pkgName, metadata, rev, (err) => {
            expect(err).toBeUndefined();
            storage.getPackageMetadata(pkgName, (err, data) => {
              expect(err).toBeNull();
              expect(data.versions['1.0.1']).toBeDefined();
              expect(data.versions['1.0.2']).toBeUndefined();
              expect(data.versions['1.0.3']).toBeUndefined();
              resolve(data);
            });
          });
        });
      });
    });

    describe('LocalStorage::tarball operations', () => {
      describe('LocalStorage::addTarball', () => {
        test('should add a new tarball', async () => {
          await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
          const tarballData = JSON.parse(readMetadata('addTarball'));
          const stream = storage.addTarball(pkgName, tarballName);
          stream.end(Buffer.from(tarballData.data, 'base64'));
          stream.done();
          return new Promise((resolve, reject) => {
            stream.on('error', (err) => {
              reject(err);
            });
            stream.on('success', function () {
              resolve(true);
            });
          });
        });

        test('should fails on add a duplicated new tarball', async () => {
          const tarballData = JSON.parse(readMetadata('addTarball'));
          await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
          await addNewVersion(pkgName, '9.0.0');
          const tarballName = `${pkgName}-9.0.0.tgz`;
          await addTarballToStore(pkgName, tarballName);
          const stream = storage.addTarball(pkgName, tarballName);
          stream.end(Buffer.from(tarballData.data, 'base64'));
          stream.done();
          return new Promise((resolve, reject) => {
            stream.on('error', (err: VerdaccioError) => {
              expect(err).not.toBeNull();
              expect(err.statusCode).toEqual(HTTP_STATUS.CONFLICT);
              expect(err.message).toMatch(/this package is already present/);
              resolve(true);
            });
            stream.on('succes', (err) => {
              reject(err);
            });
          });
        });

        test('should fails on add a new tarball on missing package', async () => {
          const tarballData = JSON.parse(readMetadata('addTarball'));
          const stream = storage.addTarball('unexsiting-package', tarballName);
          stream.end(Buffer.from(tarballData.data, 'base64'));
          stream.done();
          return new Promise((resolve) => {
            stream.on('error', (err: VerdaccioError) => {
              expect(err).not.toBeNull();
              expect(err.statusCode).toEqual(HTTP_STATUS.NOT_FOUND);
              expect(err.message).toMatch(/no such package available/);
              resolve(true);
            });

            stream.on('success', () => {
              resolve(true);
            });
          });
        });

        test('should fails on use invalid content-legnth on add a new tarball', async () => {
          // FIXME: there is a race condition here that and slow down the test
          // might be the related with stream.done(); call.
          const pkgName = 'pkg-name';
          await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
          await addNewVersion(pkgName, '9.0.0');
          const stream = storage.addTarball(pkgName, `${pkgName}-9.0.0.tgz`);

          return new Promise((resolve) => {
            stream.on('error', function (err: VerdaccioError) {
              expect(err).not.toBeNull();
              expect(err.statusCode).toEqual(HTTP_STATUS.BAD_DATA);
              expect(err.message).toMatch(/refusing to accept zero-length file/);
              resolve(true);
            });
            // to make this fail we avoid feed the stream
            stream.done();
          });
        });

        test('should fails forbidden name on add tarball', async () => {
          const pkgName = PROTO_NAME;
          await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
          await addNewVersion(pkgName, '9.0.0');
          const stream = storage.addTarball(pkgName, `${pkgName}-9.0.0.tgz`);
          return new Promise((resolve) => {
            stream.on('error', function (err: VerdaccioError) {
              expect(err).not.toBeNull();
              expect(err.statusCode).toEqual(HTTP_STATUS.FORBIDDEN);
              resolve(true);
            });
            stream.done();
          });
        });

        test.todo('should fails on update data afer add version');

        // TODO: restore when abort signal is being handled correctly
        test.skip('should fails on abort on add a new tarball', (done) => {
          const stream = storage.addTarball('__proto__', `${pkgName}-fails-add-tarball-1.0.4.tgz`);
          stream.abort();
          stream.on('error', function (err: VerdaccioError) {
            expect(err).not.toBeNull();
            expect(err.statusCode).toEqual(HTTP_STATUS.FORBIDDEN);
            expect(err.message).toMatch(/can't use this filename/);
            done();
          });

          stream.done();
        });
      });

      describe('removeTarball', () => {
        test('should remove a tarball', async () => {
          const pkgName = `remove-tarball-package`;
          const tarballName = `${pkgName}-9.0.1.tgz`;
          await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
          await addNewVersion(pkgName, '9.0.1');
          await addTarballToStore(pkgName, tarballName);
          return new Promise((resolve) => {
            storage.removeTarball(pkgName, tarballName, 'rev', (err) => {
              expect(err).toBeNull();
              resolve(true);
            });
          });
        });

        test('should remove a tarball that does not exist', async () => {
          const pkgName = `remove-tarball-package-does-not-exist`;
          await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
          await addNewVersion(pkgName, '9.0.1');
          return new Promise((resolve) => {
            storage.removeTarball(pkgName, tarballName2, 'rev', (err) => {
              expect(err).not.toBeNull();
              expect(err.statusCode).toEqual(HTTP_STATUS.NOT_FOUND);
              expect(err.message).toMatch(/no such file available/);
              resolve(true);
            });
          });
        });
      });

      describe('LocalStorage::getTarball', () => {
        test('should get a existing tarball', async () => {
          const pkgName = `existing-package`;
          await addPackageToStore(pkgName, generatePackageTemplate(pkgName));
          await addNewVersion(pkgName, '9.0.1');
          await addTarballToStore(pkgName, `package-9.0.0.tgz`);
          const stream = storage.getTarball(pkgName, `package-9.0.0.tgz`);
          return new Promise((resolve, reject) => {
            stream.on('content-length', function (contentLength) {
              expect(contentLength).toBe(279);
              resolve(true);
            });
            stream.on('error', function (err) {
              reject(err);
            });
          });
        });

        test('should fails on get a tarball that does not exist', (done) => {
          const stream = storage.getTarball('fake', tarballName);
          stream.on('error', function (err: VerdaccioError) {
            expect(err).not.toBeNull();
            expect(err.statusCode).toEqual(HTTP_STATUS.NOT_FOUND);
            expect(err.message).toMatch(/no such file available/);
            done();
          });
        });
      });
    });

    describe('removePackage', () => {
      test('should remove completely package', async () => {
        const pkgNameScoped = `non-scoped-package`;
        await addPackageToStore(pkgNameScoped, generatePackageTemplate(pkgNameScoped));
        await addNewVersion(pkgNameScoped, '9.0.0');
        await addNewVersion(pkgNameScoped, '9.0.1');
        await addTarballToStore(pkgNameScoped, `package-9.0.0.tgz`);
        await addTarballToStore(pkgNameScoped, `package-9.0.1.tgz`);
        await storage.removePackage(pkgNameScoped);
      });

      test('should remove completely @scoped package', async () => {
        const pkgNameScoped = `@remove/package`;
        await addPackageToStore(pkgNameScoped, generatePackageTemplate(pkgNameScoped));
        await addNewVersion(pkgNameScoped, '9.0.0');
        await addNewVersion(pkgNameScoped, '9.0.1');
        await addTarballToStore(pkgNameScoped, `package-9.0.0.tgz`);
        await addTarballToStore(pkgNameScoped, `package-9.0.1.tgz`);
        await storage.removePackage(pkgNameScoped);
      });

      test('should fails with package not found', async () => {
        const pkgName = 'npm_test_fake';
        await expect(storage.removePackage(pkgName)).rejects.toThrow(API_ERROR.NO_PACKAGE);
      });

      test('should fails with @scoped package not found', async () => {
        const pkgNameScoped = `@remove/package`;
        await expect(storage.removePackage(pkgNameScoped)).rejects.toThrow(API_ERROR.NO_PACKAGE);
      });
    });

    describe('search', () => {
      test.skip('should find a tarball', (done) => {
        // @ts-ignore
        const stream = storage.search('99999');

        stream.on('error', function (err) {
          expect(err).not.toBeNull();
          done();
        });

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