// Imports
import * as jwt from 'jsonwebtoken';
import {GithubPullRequests, PullRequest} from '../../lib/common/github-pull-requests';
import {GithubTeams} from '../../lib/common/github-teams';
import {BUILD_VERIFICATION_STATUS, BuildVerifier} from '../../lib/upload-server/build-verifier';
import {expectToBeUploadError} from './helpers';

// Tests
describe('BuildVerifier', () => {
  const defaultConfig = {
    allowedTeamSlugs: ['team1', 'team2'],
    githubToken: 'githubToken',
    organization: 'organization',
    repoSlug: 'repo/slug',
    secret: 'secret',
    trustedPrLabel: 'trusted: pr-label',
  };
  let bv: BuildVerifier;

  // Helpers
  const createBuildVerifier = (partialConfig: Partial<typeof defaultConfig> = {}) => {
    const cfg = {...defaultConfig, ...partialConfig} as typeof defaultConfig;
    return new BuildVerifier(cfg.secret, cfg.githubToken, cfg.repoSlug, cfg.organization,
                             cfg.allowedTeamSlugs, cfg.trustedPrLabel);
  };

  beforeEach(() => bv = createBuildVerifier());


  describe('constructor()', () => {

    ['secret', 'githubToken', 'repoSlug', 'organization', 'allowedTeamSlugs', 'trustedPrLabel'].
      forEach(param => {
        it(`should throw if '${param}' is missing or empty`, () => {
          expect(() => createBuildVerifier({[param]: ''})).
            toThrowError(`Missing or empty required parameter '${param}'!`);
        });
      });


    it('should throw if \'allowedTeamSlugs\' is an empty array', () => {
      expect(() => createBuildVerifier({allowedTeamSlugs: []})).
        toThrowError('Missing or empty required parameter \'allowedTeamSlugs\'!');
    });

  });


  describe('getPrIsTrusted()', () => {
    const pr = 9;
    let mockPrInfo: PullRequest;
    let prsFetchSpy: jasmine.Spy;
    let teamsIsMemberBySlugSpy: jasmine.Spy;

    beforeEach(() => {
      mockPrInfo = {
        labels: [
          {name: 'foo'},
          {name: 'bar'},
        ],
        number: 9,
        user: {login: 'username'},
      };

      prsFetchSpy = spyOn(GithubPullRequests.prototype, 'fetch').
        and.returnValue(Promise.resolve(mockPrInfo));

      teamsIsMemberBySlugSpy = spyOn(GithubTeams.prototype, 'isMemberBySlug').
        and.returnValue(Promise.resolve(true));
    });


    it('should return a promise', done => {
      const promise = bv.getPrIsTrusted(pr);
      promise.then(done);   // Do not complete the test (and release the spies) synchronously
                            // to avoid running the actual `GithubTeams#isMemberBySlug()`.

      expect(promise).toEqual(jasmine.any(Promise));
    });


    it('should fetch the corresponding PR', done => {
      bv.getPrIsTrusted(pr).then(() => {
        expect(prsFetchSpy).toHaveBeenCalledWith(pr);
        done();
      });
    });


    it('should fail if fetching the PR errors', done => {
      prsFetchSpy.and.callFake(() => Promise.reject('Test'));
      bv.getPrIsTrusted(pr).catch(err => {
        expect(err).toBe('Test');
        done();
      });
    });


    describe('when the PR has the "trusted PR" label', () => {

      beforeEach(() => mockPrInfo.labels.push({name: 'trusted: pr-label'}));


      it('should resolve to true', done => {
        bv.getPrIsTrusted(pr).then(isTrusted => {
          expect(isTrusted).toBe(true);
          done();
        });
      });


      it('should not try to verify the author\'s membership status', done => {
        bv.getPrIsTrusted(pr).then(() => {
          expect(teamsIsMemberBySlugSpy).not.toHaveBeenCalled();
          done();
        });
      });

    });


    describe('when the PR does not have the "trusted PR" label', () => {

      it('should verify the PR author\'s membership in the specified teams', done => {
        bv.getPrIsTrusted(pr).then(() => {
          expect(teamsIsMemberBySlugSpy).toHaveBeenCalledWith('username', ['team1', 'team2']);
          done();
        });
      });


      it('should fail if verifying membership errors', done => {
        teamsIsMemberBySlugSpy.and.callFake(() => Promise.reject('Test'));
        bv.getPrIsTrusted(pr).catch(err => {
          expect(err).toBe('Test');
          done();
        });
      });


      it('should resolve to true if the PR\'s author is a member', done => {
        teamsIsMemberBySlugSpy.and.returnValue(Promise.resolve(true));

        bv.getPrIsTrusted(pr).then(isTrusted => {
          expect(isTrusted).toBe(true);
          done();
        });
      });


      it('should resolve to false if the PR\'s author is not a member', done => {
        teamsIsMemberBySlugSpy.and.returnValue(Promise.resolve(false));

        bv.getPrIsTrusted(pr).then(isTrusted => {
          expect(isTrusted).toBe(false);
          done();
        });
      });

    });

  });


  describe('verify()', () => {
    const pr = 9;
    const defaultJwt = {
      'exp': Math.floor(Date.now() / 1000) + 30,
      'iat': Math.floor(Date.now() / 1000) - 30,
      'iss': 'Travis CI, GmbH',
      'pull-request': pr,
      'slug': defaultConfig.repoSlug,
    };
    let bvGetPrIsTrusted: jasmine.Spy;

    // Heleprs
    const createAuthHeader = (partialJwt: Partial<typeof defaultJwt> = {}, secret: string = defaultConfig.secret) =>
      `Token ${jwt.sign({...defaultJwt, ...partialJwt}, secret)}`;

    beforeEach(() => {
      bvGetPrIsTrusted = spyOn(bv, 'getPrIsTrusted').and.returnValue(Promise.resolve(true));
    });


    it('should return a promise', done => {
      const promise = bv.verify(pr, createAuthHeader());
      promise.then(done);   // Do not complete the test (and release the spies) synchronously
                            // to avoid running the actual `bvGetPrIsTrusted()`.

      expect(promise).toEqual(jasmine.any(Promise));
    });


    it('should fail if the authorization header is invalid', done => {
      bv.verify(pr, 'foo').catch(err => {
        const errorMessage = 'Error while verifying upload for PR 9: jwt malformed';

        expectToBeUploadError(err, 403, errorMessage);
        done();
      });
    });


    it('should fail if the secret is invalid', done => {
      bv.verify(pr, createAuthHeader({}, 'foo')).catch(err => {
        const errorMessage = 'Error while verifying upload for PR 9: invalid signature';

        expectToBeUploadError(err, 403, errorMessage);
        done();
      });
    });


    it('should fail if the issuer is invalid', done => {
      bv.verify(pr, createAuthHeader({iss: 'not valid'})).catch(err => {
        const errorMessage = 'Error while verifying upload for PR 9: ' +
                             `jwt issuer invalid. expected: ${defaultJwt.iss}`;

        expectToBeUploadError(err, 403, errorMessage);
        done();
      });
    });


    it('should fail if the token has expired', done => {
      bv.verify(pr, createAuthHeader({exp: 0})).catch(err => {
        const errorMessage = 'Error while verifying upload for PR 9: jwt expired';

        expectToBeUploadError(err, 403, errorMessage);
        done();
      });
    });


    it('should fail if the repo slug does not match', done => {
      bv.verify(pr, createAuthHeader({slug: 'foo/bar'})).catch(err => {
        const errorMessage = 'Error while verifying upload for PR 9: ' +
                             `jwt slug invalid. expected: ${defaultConfig.repoSlug}`;

        expectToBeUploadError(err, 403, errorMessage);
        done();
      });
    });


    it('should fail if the PR does not match', done => {
      bv.verify(pr, createAuthHeader({'pull-request': 1337})).catch(err => {
        const errorMessage = 'Error while verifying upload for PR 9: ' +
                             `jwt pull-request invalid. expected: ${pr}`;

        expectToBeUploadError(err, 403, errorMessage);
        done();
      });
    });


    it('should not fail if the token is valid', done => {
      bv.verify(pr, createAuthHeader()).then(done);
    });


    it('should not fail even if the token has been issued in the future', done => {
      const in30s = Math.floor(Date.now() / 1000) + 30;
      bv.verify(pr, createAuthHeader({iat: in30s})).then(done);
    });


    it('should call \'getPrIsTrusted()\' if the token is valid', done => {
      bv.verify(pr, createAuthHeader()).then(() => {
        expect(bvGetPrIsTrusted).toHaveBeenCalledWith(pr);
        done();
      });
    });


    it('should fail if \'getPrIsTrusted()\' rejects', done => {
      bvGetPrIsTrusted.and.callFake(() => Promise.reject('Test'));
      bv.verify(pr, createAuthHeader()).catch(err => {
        expectToBeUploadError(err, 403, `Error while verifying upload for PR ${pr}: Test`);
        done();
      });
    });


    it('should resolve to `verifiedNotTrusted` if \'getPrIsTrusted()\' returns false', done => {
      bvGetPrIsTrusted.and.returnValue(Promise.resolve(false));
      bv.verify(pr, createAuthHeader()).then(value => {
        expect(value).toBe(BUILD_VERIFICATION_STATUS.verifiedNotTrusted);
        done();
      });
    });


    it('should resolve to `verifiedAndTrusted` if \'getPrIsTrusted()\' returns true', done => {
      bv.verify(pr, createAuthHeader()).then(value => {
        expect(value).toBe(BUILD_VERIFICATION_STATUS.verifiedAndTrusted);
        done();
      });
    });

  });

});