const sinon = require('sinon')
const chai = require('chai')
const { expect } = chai
const modulePath =
  '../../../../app/src/Features/Authentication/AuthenticationController.js'
const SandboxedModule = require('sandboxed-module')
const tk = require('timekeeper')
const MockRequest = require('../helpers/MockRequest')
const MockResponse = require('../helpers/MockResponse')
const { ObjectId } = require('mongodb')

describe('AuthenticationController', function() {
  beforeEach(function() {
    tk.freeze(Date.now())
    this.UserModel = { findOne: sinon.stub() }
    this.httpAuthUsers = {
      'valid-test-user': Math.random()
        .toString(16)
        .slice(2)
    }
    this.AuthenticationController = SandboxedModule.require(modulePath, {
      globals: {
        console: console
      },
      requires: {
        '../Helpers/AsyncFormHelper': (this.AsyncFormHelper = {
          redirect: sinon.stub()
        }),
        '../../infrastructure/RequestContentTypeDetection': {
          acceptsJson: (this.acceptsJson = sinon.stub().returns(false))
        },
        './AuthenticationManager': (this.AuthenticationManager = {}),
        '../User/UserUpdater': (this.UserUpdater = {
          updateUser: sinon.stub()
        }),
        '@overleaf/metrics': (this.Metrics = { inc: sinon.stub() }),
        '../Security/LoginRateLimiter': (this.LoginRateLimiter = {
          processLoginRequest: sinon.stub(),
          recordSuccessfulLogin: sinon.stub()
        }),
        '../User/UserHandler': (this.UserHandler = {
          setupLoginData: sinon.stub()
        }),
        '../Analytics/AnalyticsManager': (this.AnalyticsManager = {
          recordEvent: sinon.stub(),
          identifyUser: sinon.stub()
        }),
        '../../infrastructure/SessionStoreManager': (this.SessionStoreManager = {}),
        'logger-sharelatex': (this.logger = {
          log: sinon.stub(),
          warn: sinon.stub(),
          error: sinon.stub(),
          err: sinon.stub()
        }),
        'settings-sharelatex': (this.Settings = {
          siteUrl: 'http://www.foo.bar',
          httpAuthUsers: this.httpAuthUsers
        }),
        passport: (this.passport = {
          authenticate: sinon.stub().returns(sinon.stub())
        }),
        '../User/UserSessionsManager': (this.UserSessionsManager = {
          trackSession: sinon.stub(),
          untrackSession: sinon.stub(),
          revokeAllUserSessions: sinon.stub().callsArgWith(1, null)
        }),
        '../../infrastructure/Modules': (this.Modules = {
          hooks: { fire: sinon.stub().yields(null, []) }
        }),
        '../Notifications/NotificationsBuilder': (this.NotificationsBuilder = {
          ipMatcherAffiliation: sinon.stub()
        }),
        '../../models/User': { User: this.UserModel },
        '../../../../modules/oauth2-server/app/src/Oauth2Server': (this.Oauth2Server = {
          Request: sinon.stub(),
          Response: sinon.stub(),
          server: {
            authenticate: sinon.stub()
          }
        }),
        '../Helpers/UrlHelper': (this.UrlHelper = {
          getSafeRedirectPath: sinon.stub()
        })
      }
    })
    this.UrlHelper.getSafeRedirectPath
      .withArgs('https://evil.com')
      .returns(undefined)
    this.UrlHelper.getSafeRedirectPath.returnsArg(0)
    this.user = {
      _id: ObjectId(),
      email: (this.email = 'USER@example.com'),
      first_name: 'bob',
      last_name: 'brown',
      referal_id: 1234,
      isAdmin: false
    }
    this.password = 'banana'
    this.req = new MockRequest()
    this.res = new MockResponse()
    this.callback = sinon.stub()
    this.next = sinon.stub()
  })

  afterEach(function() {
    tk.reset()
  })

  describe('validateAdmin', function() {
    beforeEach(function() {
      this.Settings.adminDomains = ['good.example.com']
      this.goodAdmin = {
        email: 'alice@good.example.com',
        isAdmin: true
      }
      this.badAdmin = {
        email: 'beatrice@bad.example.com',
        isAdmin: true
      }
      this.normalUser = {
        email: 'claire@whatever.example.com',
        isAdmin: false
      }
    })

    it('should skip when adminDomains are not configured', function(done) {
      this.Settings.adminDomains = []
      this.AuthenticationController.getSessionUser = sinon
        .stub()
        .returns(this.normalUser)
      this.AuthenticationController.validateAdmin(this.req, this.res, err => {
        this.AuthenticationController.getSessionUser.called.should.equal(false)
        expect(err).to.not.exist
        done()
      })
    })

    it('should skip non-admin user', function(done) {
      this.AuthenticationController.getSessionUser = sinon
        .stub()
        .returns(this.normalUser)
      this.AuthenticationController.validateAdmin(this.req, this.res, err => {
        this.AuthenticationController.getSessionUser.called.should.equal(true)
        expect(err).to.not.exist
        done()
      })
    })

    it('should permit an admin with the right doman', function(done) {
      this.AuthenticationController.getSessionUser = sinon
        .stub()
        .returns(this.goodAdmin)
      this.AuthenticationController.validateAdmin(this.req, this.res, err => {
        this.AuthenticationController.getSessionUser.called.should.equal(true)
        expect(err).to.not.exist
        done()
      })
    })

    it('should block an admin with a missing email', function(done) {
      this.AuthenticationController.getSessionUser = sinon
        .stub()
        .returns({ isAdmin: true })
      this.AuthenticationController.validateAdmin(this.req, this.res, err => {
        this.AuthenticationController.getSessionUser.called.should.equal(true)
        expect(err).to.exist
        done()
      })
    })

    it('should block an admin with a bad domain', function(done) {
      this.AuthenticationController.getSessionUser = sinon
        .stub()
        .returns(this.badAdmin)
      this.AuthenticationController.validateAdmin(this.req, this.res, err => {
        this.AuthenticationController.getSessionUser.called.should.equal(true)
        expect(err).to.exist
        done()
      })
    })
  })

  describe('isUserLoggedIn', function() {
    beforeEach(function() {
      this.stub = sinon.stub(this.AuthenticationController, 'getLoggedInUserId')
    })

    afterEach(function() {
      this.stub.restore()
    })

    it('should do the right thing in all cases', function() {
      this.AuthenticationController.getLoggedInUserId.returns('some_id')
      expect(this.AuthenticationController.isUserLoggedIn(this.req)).to.equal(
        true
      )
      this.AuthenticationController.getLoggedInUserId.returns(null)
      expect(this.AuthenticationController.isUserLoggedIn(this.req)).to.equal(
        false
      )
      this.AuthenticationController.getLoggedInUserId.returns(false)
      expect(this.AuthenticationController.isUserLoggedIn(this.req)).to.equal(
        false
      )
      this.AuthenticationController.getLoggedInUserId.returns(undefined)
      expect(this.AuthenticationController.isUserLoggedIn(this.req)).to.equal(
        false
      )
    })
  })

  describe('setInSessionUser', function() {
    beforeEach(function() {
      this.user = {
        _id: 'id',
        first_name: 'a',
        last_name: 'b',
        email: 'c'
      }
      this.AuthenticationController.getSessionUser = sinon
        .stub()
        .returns(this.user)
    })

    it('should update the right properties', function() {
      this.AuthenticationController.setInSessionUser(this.req, {
        first_name: 'new_first_name',
        email: 'new_email'
      })
      const expectedUser = {
        _id: 'id',
        first_name: 'new_first_name',
        last_name: 'b',
        email: 'new_email'
      }
      expect(this.user).to.deep.equal(expectedUser)
      expect(this.user).to.deep.equal(expectedUser)
    })
  })

  describe('passportLogin', function() {
    beforeEach(function() {
      this.info = null
      this.req.login = sinon.stub().callsArgWith(1, null)
      this.res.json = sinon.stub()
      this.req.session = {
        passport: { user: this.user },
        postLoginRedirect: '/path/to/redir/to'
      }
      this.req.session.destroy = sinon.stub().callsArgWith(0, null)
      this.req.session.save = sinon.stub().callsArgWith(0, null)
      this.req.sessionStore = { generate: sinon.stub() }
      this.AuthenticationController.finishLogin = sinon.stub()
      this.passport.authenticate.callsArgWith(1, null, this.user, this.info)
      this.err = new Error('woops')
    })

    it('should call passport.authenticate', function() {
      this.AuthenticationController.passportLogin(this.req, this.res, this.next)
      this.passport.authenticate.callCount.should.equal(1)
    })

    describe('when authenticate produces an error', function() {
      beforeEach(function() {
        this.passport.authenticate.callsArgWith(1, this.err)
      })

      it('should return next with an error', function() {
        this.AuthenticationController.passportLogin(
          this.req,
          this.res,
          this.next
        )
        this.next.calledWith(this.err).should.equal(true)
      })
    })

    describe('when authenticate produces a user', function() {
      beforeEach(function() {
        this.req.session.postLoginRedirect = 'some_redirect'
        this.passport.authenticate.callsArgWith(1, null, this.user, this.info)
      })

      afterEach(function() {
        delete this.req.session.postLoginRedirect
      })

      it('should call finishLogin', function() {
        this.AuthenticationController.passportLogin(
          this.req,
          this.res,
          this.next
        )
        this.AuthenticationController.finishLogin.callCount.should.equal(1)
        this.AuthenticationController.finishLogin
          .calledWith(this.user)
          .should.equal(true)
      })
    })

    describe('when authenticate does not produce a user', function() {
      beforeEach(function() {
        this.info = { text: 'a', type: 'b' }
        this.passport.authenticate.callsArgWith(1, null, false, this.info)
      })

      it('should not call finishLogin', function() {
        this.AuthenticationController.passportLogin(
          this.req,
          this.res,
          this.next
        )
        this.AuthenticationController.finishLogin.callCount.should.equal(0)
      })

      it('should not send a json response with redirect', function() {
        this.AuthenticationController.passportLogin(
          this.req,
          this.res,
          this.next
        )
        this.res.json.callCount.should.equal(1)
        this.res.json.calledWith({ message: this.info }).should.equal(true)
        expect(this.res.json.lastCall.args[0].redir != null).to.equal(false)
      })
    })
  })

  describe('doPassportLogin', function() {
    beforeEach(function() {
      this.AuthenticationController._recordFailedLogin = sinon.stub()
      this.AuthenticationController._recordSuccessfulLogin = sinon.stub()
      this.Modules.hooks.fire = sinon.stub().callsArgWith(3, null, [])
      // @AuthenticationController.establishUserSession = sinon.stub().callsArg(2)
      this.req.body = {
        email: this.email,
        password: this.password,
        session: {
          postLoginRedirect: '/path/to/redir/to'
        }
      }
      this.cb = sinon.stub()
    })

    describe('when the preDoPassportLogin hooks produce an info object', function() {
      beforeEach(function() {
        this.Modules.hooks.fire = sinon
          .stub()
          .callsArgWith(3, null, [null, { redir: '/somewhere' }, null])
      })

      it('should stop early and call done with this info object', function(done) {
        this.AuthenticationController.doPassportLogin(
          this.req,
          this.req.body.email,
          this.req.body.password,
          this.cb
        )
        this.cb.callCount.should.equal(1)
        this.cb
          .calledWith(null, false, { redir: '/somewhere' })
          .should.equal(true)
        this.LoginRateLimiter.processLoginRequest.callCount.should.equal(0)
        done()
      })
    })

    describe('when the users rate limit', function() {
      beforeEach(function() {
        this.LoginRateLimiter.processLoginRequest.callsArgWith(1, null, false)
      })

      it('should block the request if the limit has been exceeded', function(done) {
        this.AuthenticationController.doPassportLogin(
          this.req,
          this.req.body.email,
          this.req.body.password,
          this.cb
        )
        this.cb.callCount.should.equal(1)
        this.cb.calledWith(null, null).should.equal(true)
        done()
      })
    })

    describe('when the user is authenticated', function() {
      beforeEach(function() {
        this.cb = sinon.stub()
        this.LoginRateLimiter.processLoginRequest.callsArgWith(1, null, true)
        this.AuthenticationManager.authenticate = sinon
          .stub()
          .callsArgWith(2, null, this.user)
        this.req.sessionID = Math.random()
        this.AuthenticationController.doPassportLogin(
          this.req,
          this.req.body.email,
          this.req.body.password,
          this.cb
        )
      })

      it('should attempt to authorise the user', function() {
        this.AuthenticationManager.authenticate
          .calledWith({ email: this.email.toLowerCase() }, this.password)
          .should.equal(true)
      })

      it("should establish the user's session", function() {
        this.cb.calledWith(null, this.user).should.equal(true)
      })
    })

    describe('when the user is not authenticated', function() {
      beforeEach(function() {
        this.LoginRateLimiter.processLoginRequest.callsArgWith(1, null, true)
        this.AuthenticationManager.authenticate = sinon
          .stub()
          .callsArgWith(2, null, null)
        this.cb = sinon.stub()
        this.AuthenticationController.doPassportLogin(
          this.req,
          this.req.body.email,
          this.req.body.password,
          this.cb
        )
      })

      it('should not establish the login', function() {
        this.cb.callCount.should.equal(1)
        this.cb.calledWith(null, false)
        // @res.body.should.exist
        expect(this.cb.lastCall.args[2]).to.contain.all.keys(['text', 'type'])
      })
      // message:
      // 	text: 'Your email or password were incorrect. Please try again',
      // 	type: 'error'

      it('should not setup the user data in the background', function() {
        this.UserHandler.setupLoginData.called.should.equal(false)
      })

      it('should record a failed login', function() {
        this.AuthenticationController._recordFailedLogin.called.should.equal(
          true
        )
      })

      it('should log the failed login', function() {
        this.logger.log
          .calledWith({ email: this.email.toLowerCase() }, 'failed log in')
          .should.equal(true)
      })
    })
  })

  describe('getLoggedInUserId', function() {
    beforeEach(function() {
      this.req = { session: {} }
    })

    it('should return the user id from the session', function() {
      this.user_id = '2134'
      this.req.session.user = { _id: this.user_id }
      const result = this.AuthenticationController.getLoggedInUserId(this.req)
      expect(result).to.equal(this.user_id)
    })

    it('should return user for passport session', function() {
      this.user_id = '2134'
      this.req.session = {
        passport: {
          user: {
            _id: this.user_id
          }
        }
      }
      const result = this.AuthenticationController.getLoggedInUserId(this.req)
      expect(result).to.equal(this.user_id)
    })

    it('should return null if there is no user on the session', function() {
      const result = this.AuthenticationController.getLoggedInUserId(this.req)
      expect(result).to.equal(null)
    })

    it('should return null if there is no session', function() {
      this.req = {}
      const result = this.AuthenticationController.getLoggedInUserId(this.req)
      expect(result).to.equal(null)
    })

    it('should return null if there is no req', function() {
      this.req = {}
      const result = this.AuthenticationController.getLoggedInUserId(this.req)
      expect(result).to.equal(null)
    })
  })

  describe('requireLogin', function() {
    beforeEach(function() {
      this.user = {
        _id: 'user-id-123',
        email: 'user@sharelatex.com'
      }
      this.middleware = this.AuthenticationController.requireLogin()
    })

    describe('when the user is logged in', function() {
      beforeEach(function() {
        this.req.session = {
          user: (this.user = {
            _id: 'user-id-123',
            email: 'user@sharelatex.com'
          })
        }
        this.middleware(this.req, this.res, this.next)
      })

      it('should call the next method in the chain', function() {
        this.next.called.should.equal(true)
      })
    })

    describe('when the user is not logged in', function() {
      beforeEach(function() {
        this.req.session = {}
        this.AuthenticationController._redirectToLoginOrRegisterPage = sinon.stub()
        this.req.query = {}
        this.middleware(this.req, this.res, this.next)
      })

      it('should redirect to the register or login page', function() {
        this.AuthenticationController._redirectToLoginOrRegisterPage
          .calledWith(this.req, this.res)
          .should.equal(true)
      })
    })
  })

  describe('validateUserSession', function() {
    beforeEach(function() {
      this.user = {
        _id: 'user-id-123',
        email: 'user@sharelatex.com'
      }
      this.middleware = this.AuthenticationController.validateUserSession()
    })

    describe('when the user has a session token', function() {
      beforeEach(function() {
        this.req.user = this.user
        this.SessionStoreManager.hasValidationToken = sinon.stub().returns(true)
        this.middleware(this.req, this.res, this.next)
      })

      it('should call the next method in the chain', function() {
        this.next.called.should.equal(true)
      })
    })

    describe('when the user does not have a session token', function() {
      beforeEach(function() {
        this.req.session = {
          user: this.user,
          regenerate: sinon.stub().yields()
        }
        this.req.user = this.user
        this.AuthenticationController._redirectToLoginOrRegisterPage = sinon.stub()
        this.req.query = {}
        this.SessionStoreManager.hasValidationToken = sinon
          .stub()
          .returns(false)
        this.middleware(this.req, this.res, this.next)
      })

      it('should destroy the current session', function() {
        this.req.session.regenerate.called.should.equal(true)
      })

      it('should redirect to the register or login page', function() {
        this.AuthenticationController._redirectToLoginOrRegisterPage
          .calledWith(this.req, this.res)
          .should.equal(true)
      })
    })
  })

  describe('requireOauth', function() {
    beforeEach(function() {
      this.res.send = sinon.stub()
      this.res.status = sinon.stub().returns(this.res)
      this.res.sendStatus = sinon.stub()
      this.middleware = this.AuthenticationController.requireOauth()
    })

    describe('when Oauth2Server authenticates', function() {
      beforeEach(function() {
        this.token = {
          accessToken: 'token',
          user: 'user'
        }
        this.Oauth2Server.server.authenticate.yields(null, this.token)
        this.middleware(this.req, this.res, this.next)
      })

      it('should set oauth_token on request', function() {
        this.req.oauth_token.should.equal(this.token)
      })

      it('should set oauth on request', function() {
        this.req.oauth.access_token.should.equal(this.token.accessToken)
      })

      it('should set oauth_user on request', function() {
        this.req.oauth_user.should.equal('user')
      })

      it('should call next', function() {
        this.next.should.have.been.calledOnce
      })
    })

    describe('when Oauth2Server returns 401 error', function() {
      beforeEach(function() {
        this.Oauth2Server.server.authenticate.yields({ code: 401 })
        this.middleware(this.req, this.res, this.next)
      })

      it('should return 401 error', function() {
        this.res.status.should.have.been.calledWith(401)
      })

      it('should not call next', function() {
        this.next.should.have.not.been.calledOnce
      })
    })
  })

  describe('requireGlobalLogin', function() {
    beforeEach(function() {
      this.req.headers = {}
      this.AuthenticationController.httpAuth = sinon.stub()
      this.setRedirect = sinon.spy(
        this.AuthenticationController,
        'setRedirectInSession'
      )
    })

    afterEach(function() {
      this.setRedirect.restore()
    })

    describe('with white listed url', function() {
      beforeEach(function() {
        this.AuthenticationController.addEndpointToLoginWhitelist('/login')
        this.req._parsedUrl.pathname = '/login'
        this.AuthenticationController.requireGlobalLogin(
          this.req,
          this.res,
          this.next
        )
      })

      it('should call next() directly', function() {
        this.next.called.should.equal(true)
      })
    })

    describe('with white listed url and a query string', function() {
      beforeEach(function() {
        this.AuthenticationController.addEndpointToLoginWhitelist('/login')
        this.req._parsedUrl.pathname = '/login'
        this.req.url = '/login?query=something'
        this.AuthenticationController.requireGlobalLogin(
          this.req,
          this.res,
          this.next
        )
      })

      it('should call next() directly', function() {
        this.next.called.should.equal(true)
      })
    })

    describe('with http auth', function() {
      beforeEach(function() {
        this.req.headers.authorization = 'Mock Basic Auth'
        this.AuthenticationController.requireGlobalLogin(
          this.req,
          this.res,
          this.next
        )
      })

      it('should pass the request onto httpAuth', function() {
        this.AuthenticationController.httpAuth
          .calledWith(this.req, this.res, this.next)
          .should.equal(true)
      })
    })

    describe('with a user session', function() {
      beforeEach(function() {
        this.req.session = { user: { mock: 'user', _id: 'some_id' } }
        this.AuthenticationController.requireGlobalLogin(
          this.req,
          this.res,
          this.next
        )
      })

      it('should call next() directly', function() {
        this.next.called.should.equal(true)
      })
    })

    describe('with no login credentials', function() {
      beforeEach(function() {
        this.req.session = {}
        this.AuthenticationController.requireGlobalLogin(
          this.req,
          this.res,
          this.next
        )
      })

      it('should have called setRedirectInSession', function() {
        this.setRedirect.callCount.should.equal(1)
      })

      it('should redirect to the /login page', function() {
        this.res.redirectedTo.should.equal('/login')
      })
    })
  })

  describe('httpAuth', function() {
    describe('with http auth', function() {
      it('should error with incorrect user', function(done) {
        this.req.headers = {
          authorization: `Basic ${Buffer.from('user:nope').toString('base64')}`
        }
        this.req.end = status => {
          expect(status).to.equal('Unauthorized')
          done()
        }
        this.AuthenticationController.httpAuth(this.req, this.req)
      })

      it('should error with incorrect password', function(done) {
        this.req.headers = {
          authorization: `Basic ${Buffer.from('valid-test-user:nope').toString(
            'base64'
          )}`
        }
        this.req.end = status => {
          expect(status).to.equal('Unauthorized')
          done()
        }
        this.AuthenticationController.httpAuth(this.req, this.req)
      })

      it('should fail with empty pass', function(done) {
        this.req.headers = {
          authorization: `Basic ${Buffer.from(`invalid-test-user:`).toString(
            'base64'
          )}`
        }
        this.req.end = status => {
          expect(status).to.equal('Unauthorized')
          done()
        }
        this.AuthenticationController.httpAuth(this.req, this.req)
      })

      it('should succeed with correct user/pass', function(done) {
        this.req.headers = {
          authorization: `Basic ${Buffer.from(
            `valid-test-user:${this.httpAuthUsers['valid-test-user']}`
          ).toString('base64')}`
        }
        this.AuthenticationController.httpAuth(this.req, this.res, done)
      })
    })
  })

  describe('_redirectToLoginOrRegisterPage', function() {
    beforeEach(function() {
      this.middleware = this.AuthenticationController.requireLogin(
        (this.options = { load_from_db: false })
      )
      this.req.session = {}
      this.AuthenticationController._redirectToRegisterPage = sinon.stub()
      this.AuthenticationController._redirectToLoginPage = sinon.stub()
      this.req.query = {}
    })

    describe('they have come directly to the url', function() {
      beforeEach(function() {
        this.req.query = {}
        this.middleware(this.req, this.res, this.next)
      })

      it('should redirect to the login page', function() {
        this.AuthenticationController._redirectToRegisterPage
          .calledWith(this.req, this.res)
          .should.equal(false)
        this.AuthenticationController._redirectToLoginPage
          .calledWith(this.req, this.res)
          .should.equal(true)
      })
    })

    describe('they have come via a templates link', function() {
      beforeEach(function() {
        this.req.query.zipUrl = 'something'
        this.middleware(this.req, this.res, this.next)
      })

      it('should redirect to the register page', function() {
        this.AuthenticationController._redirectToRegisterPage
          .calledWith(this.req, this.res)
          .should.equal(true)
        this.AuthenticationController._redirectToLoginPage
          .calledWith(this.req, this.res)
          .should.equal(false)
      })
    })

    describe('they have been invited to a project', function() {
      beforeEach(function() {
        this.req.query.project_name = 'something'
        this.middleware(this.req, this.res, this.next)
      })

      it('should redirect to the register page', function() {
        this.AuthenticationController._redirectToRegisterPage
          .calledWith(this.req, this.res)
          .should.equal(true)
        this.AuthenticationController._redirectToLoginPage
          .calledWith(this.req, this.res)
          .should.equal(false)
      })
    })
  })

  describe('_redirectToRegisterPage', function() {
    beforeEach(function() {
      this.req.path = '/target/url'
      this.req.query = { extra_query: 'foo' }
      this.AuthenticationController._redirectToRegisterPage(this.req, this.res)
    })

    it('should redirect to the register page with a query string attached', function() {
      this.req.session.postLoginRedirect.should.equal(
        '/target/url?extra_query=foo'
      )
      this.res.redirectedTo.should.equal('/register?extra_query=foo')
    })

    it('should log out a message', function() {
      this.logger.log
        .calledWith(
          { url: this.url },
          'user not logged in so redirecting to register page'
        )
        .should.equal(true)
    })
  })

  describe('_redirectToLoginPage', function() {
    beforeEach(function() {
      this.req.path = '/target/url'
      this.req.query = { extra_query: 'foo' }
      this.AuthenticationController._redirectToLoginPage(this.req, this.res)
    })

    it('should redirect to the register page with a query string attached', function() {
      this.req.session.postLoginRedirect.should.equal(
        '/target/url?extra_query=foo'
      )
      this.res.redirectedTo.should.equal('/login?extra_query=foo')
    })
  })

  describe('_recordSuccessfulLogin', function() {
    beforeEach(function() {
      this.UserUpdater.updateUser = sinon.stub().callsArg(2)
      this.AuthenticationController._recordSuccessfulLogin(
        this.user._id,
        this.callback
      )
    })

    it('should increment the user.login.success metric', function() {
      this.Metrics.inc.calledWith('user.login.success').should.equal(true)
    })

    it("should update the user's login count and last logged in date", function() {
      this.UserUpdater.updateUser.args[0][1].$set.lastLoggedIn.should.not.equal(
        undefined
      )
      this.UserUpdater.updateUser.args[0][1].$inc.loginCount.should.equal(1)
    })

    it('should call the callback', function() {
      this.callback.called.should.equal(true)
    })
  })

  describe('_recordFailedLogin', function() {
    beforeEach(function() {
      this.AuthenticationController._recordFailedLogin(this.callback)
    })

    it('should increment the user.login.failed metric', function() {
      this.Metrics.inc.calledWith('user.login.failed').should.equal(true)
    })

    it('should call the callback', function() {
      this.callback.called.should.equal(true)
    })
  })

  describe('setRedirectInSession', function() {
    beforeEach(function() {
      this.req = { session: {} }
      this.req.path = '/somewhere'
      this.req.query = { one: '1' }
    })

    it('should set redirect property on session', function() {
      this.AuthenticationController.setRedirectInSession(this.req)
      expect(this.req.session.postLoginRedirect).to.equal('/somewhere?one=1')
    })

    it('should set the supplied value', function() {
      this.AuthenticationController.setRedirectInSession(
        this.req,
        '/somewhere/specific'
      )
      expect(this.req.session.postLoginRedirect).to.equal('/somewhere/specific')
    })

    it('should not allow open redirects', function() {
      this.AuthenticationController.setRedirectInSession(
        this.req,
        'https://evil.com'
      )
      expect(this.req.session.postLoginRedirect).to.be.undefined
    })

    describe('with a png', function() {
      beforeEach(function() {
        this.req = { session: {} }
      })

      it('should not set the redirect', function() {
        this.AuthenticationController.setRedirectInSession(
          this.req,
          '/something.png'
        )
        expect(this.req.session.postLoginRedirect).to.equal(undefined)
      })
    })

    describe('with a js path', function() {
      beforeEach(function() {
        this.req = { session: {} }
      })

      it('should not set the redirect', function() {
        this.AuthenticationController.setRedirectInSession(
          this.req,
          '/js/something.js'
        )
        expect(this.req.session.postLoginRedirect).to.equal(undefined)
      })
    })
  })

  describe('_getRedirectFromSession', function() {
    it('should get redirect property from session', function() {
      this.req = { session: { postLoginRedirect: '/a?b=c' } }
      expect(
        this.AuthenticationController._getRedirectFromSession(this.req)
      ).to.equal('/a?b=c')
    })

    it('should not allow open redirects', function() {
      this.req = { session: { postLoginRedirect: 'https://evil.com' } }
      expect(this.AuthenticationController._getRedirectFromSession(this.req)).to
        .be.null
    })

    it('handle null values', function() {
      this.req = { session: {} }
      expect(this.AuthenticationController._getRedirectFromSession(this.req)).to
        .be.null
    })
  })

  describe('_clearRedirectFromSession', function() {
    beforeEach(function() {
      this.req = { session: { postLoginRedirect: '/a?b=c' } }
    })

    it('should remove the redirect property from session', function() {
      this.AuthenticationController._clearRedirectFromSession(this.req)
      expect(this.req.session.postLoginRedirect).to.equal(undefined)
    })
  })

  describe('finishLogin', function() {
    // - get redirect
    // - async handlers
    // - afterLoginSessionSetup
    // - clear redirect
    // - issue redir, two ways
    beforeEach(function() {
      this.AuthenticationController._getRedirectFromSession = sinon
        .stub()
        .returns('/some/page')

      this.req.sessionID = 'thisisacryptographicallysecurerandomid'
      this.req.session = {
        passport: { user: { _id: 'one' } }
      }
      this.req.session.destroy = sinon.stub().callsArgWith(0, null)
      this.req.session.save = sinon.stub().callsArgWith(0, null)
      this.req.sessionStore = { generate: sinon.stub() }
      this.req.login = sinon.stub().yields(null)

      this.AuthenticationController._clearRedirectFromSession = sinon.stub()
      this.AuthenticationController._redirectToReconfirmPage = sinon.stub()
      this.UserSessionsManager.trackSession = sinon.stub()
      this.UserHandler.setupLoginData = sinon.stub()
      this.LoginRateLimiter.recordSuccessfulLogin = sinon.stub()
      this.AuthenticationController._recordSuccessfulLogin = sinon.stub()
      this.AnalyticsManager.recordEvent = sinon.stub()
      this.AnalyticsManager.identifyUser = sinon.stub()
      this.acceptsJson.returns(true)
      this.res.json = sinon.stub()
      this.res.redirect = sinon.stub()
    })

    it('should extract the redirect from the session', function() {
      this.AuthenticationController.finishLogin(
        this.user,
        this.req,
        this.res,
        this.next
      )
      expect(
        this.AuthenticationController._getRedirectFromSession.callCount
      ).to.equal(1)
      expect(
        this.AuthenticationController._getRedirectFromSession.calledWith(
          this.req
        )
      ).to.equal(true)
    })

    it('should clear redirect from session', function() {
      this.AuthenticationController.finishLogin(
        this.user,
        this.req,
        this.res,
        this.next
      )
      expect(
        this.AuthenticationController._clearRedirectFromSession.callCount
      ).to.equal(1)
      expect(
        this.AuthenticationController._clearRedirectFromSession.calledWith(
          this.req
        )
      ).to.equal(true)
    })

    it('should issue a json response with a redirect', function() {
      this.AuthenticationController.finishLogin(
        this.user,
        this.req,
        this.res,
        this.next
      )
      expect(
        this.AsyncFormHelper.redirect.calledWith(
          this.req,
          this.res,
          '/some/page'
        )
      ).to.equal(true)
    })

    describe('with a non-json request', function() {
      beforeEach(function() {
        this.acceptsJson.returns(false)
        this.res.json = sinon.stub()
        this.res.redirect = sinon.stub()
      })

      it('should issue a plain redirect', function() {
        this.AuthenticationController.finishLogin(
          this.user,
          this.req,
          this.res,
          this.next
        )
        expect(
          this.AsyncFormHelper.redirect.calledWith(
            this.req,
            this.res,
            '/some/page'
          )
        ).to.equal(true)
      })
    })

    describe('when user is flagged to reconfirm', function() {
      beforeEach(function() {
        this.req.session = {}
        this.user.must_reconfirm = true
      })
      it('should redirect to reconfirm page', function() {
        this.AuthenticationController.finishLogin(
          this.user,
          this.req,
          this.res,
          this.next
        )
        expect(
          this.AuthenticationController._redirectToReconfirmPage.calledWith(
            this.req
          )
        ).to.equal(true)
      })
    })

    describe('preFinishLogin hook', function() {
      it('call hook and proceed', function() {
        this.Modules.hooks.fire = sinon.stub().yields(null, [])
        this.AuthenticationController.finishLogin(
          this.user,
          this.req,
          this.res,
          this.next
        )
        sinon.assert.calledWith(
          this.Modules.hooks.fire,
          'preFinishLogin',
          this.req,
          this.res,
          this.user
        )
        expect(this.AsyncFormHelper.redirect.called).to.equal(true)
      })

      it('stop if hook has redirected', function(done) {
        this.Modules.hooks.fire = sinon
          .stub()
          .yields(null, [{ doNotFinish: true }])
        this.AuthenticationController.finishLogin(
          this.user,
          this.req,
          this.res,
          this.next
        )
        expect(this.next.callCount).to.equal(0)
        expect(this.res.json.callCount).to.equal(0)
        done()
      })

      it('call next with hook errors', function(done) {
        this.Modules.hooks.fire = sinon.stub().yields(new Error())
        this.AuthenticationController.finishLogin(
          this.user,
          this.req,
          this.res,
          error => {
            expect(error).to.exist
            expect(this.res.json.callCount).to.equal(0)
            done()
          }
        )
      })
    })

    describe('_afterLoginSessionSetup', function() {
      beforeEach(function() {})

      it('should call req.login', function() {
        this.AuthenticationController.finishLogin(
          this.user,
          this.req,
          this.res,
          this.next
        )
        this.req.login.callCount.should.equal(1)
      })

      it('should call req.session.save', function() {
        this.AuthenticationController.finishLogin(
          this.user,
          this.req,
          this.res,
          this.next
        )
        this.req.session.save.callCount.should.equal(1)
      })

      it('should call UserSessionsManager.trackSession', function() {
        this.AuthenticationController.finishLogin(
          this.user,
          this.req,
          this.res,
          this.next
        )
        this.UserSessionsManager.trackSession.callCount.should.equal(1)
      })

      describe('when req.session.save produces an error', function() {
        beforeEach(function() {
          this.req.session.save = sinon
            .stub()
            .callsArgWith(0, new Error('woops'))
        })

        it('should produce an error', function(done) {
          this.AuthenticationController.finishLogin(
            this.user,
            this.req,
            this.res,
            err => {
              expect(err).to.not.be.oneOf([null, undefined])
              expect(err).to.be.instanceof(Error)
              done()
            }
          )
        })

        it('should not call UserSessionsManager.trackSession', function(done) {
          this.AuthenticationController.finishLogin(
            this.user,
            this.req,
            this.res,
            err => {
              expect(err).to.exist
              this.UserSessionsManager.trackSession.callCount.should.equal(0)
              done()
            }
          )
        })
      })
    })

    describe('_loginAsyncHandlers', function() {
      beforeEach(function() {
        this.AuthenticationController.finishLogin(
          this.user,
          this.req,
          this.res,
          this.next
        )
      })

      it('should call identifyUser', function() {
        this.AnalyticsManager.identifyUser
          .calledWith(this.user._id, this.req.sessionID)
          .should.equal(true)
      })

      it('should setup the user data in the background', function() {
        this.UserHandler.setupLoginData.calledWith(this.user).should.equal(true)
      })

      it('should set res.session.justLoggedIn', function() {
        this.req.session.justLoggedIn.should.equal(true)
      })

      it('should record the successful login', function() {
        this.AuthenticationController._recordSuccessfulLogin
          .calledWith(this.user._id)
          .should.equal(true)
      })

      it('should tell the rate limiter that there was a success for that email', function() {
        this.LoginRateLimiter.recordSuccessfulLogin
          .calledWith(this.user.email)
          .should.equal(true)
      })

      it('should log the successful login', function() {
        this.logger.log
          .calledWith(
            { email: this.user.email, user_id: this.user._id.toString() },
            'successful log in'
          )
          .should.equal(true)
      })

      it('should track the login event', function() {
        this.AnalyticsManager.recordEvent
          .calledWith(this.user._id, 'user-logged-in')
          .should.equal(true)
      })
    })
  })
})