var User;
var AccessToken = loopback.AccessToken;
var MailConnector = require('../lib/connectors/mail');

var userMemory = loopback.createDataSource({
  connector: 'memory'
});

describe('User', function() {
  var validCredentials = {email: 'foo@bar.com', password: 'bar'};
  var validCredentialsEmailVerified = {email: 'foo1@bar.com', password: 'bar1', emailVerified: true};
  var validCredentialsEmailVerifiedOverREST = {email: 'foo2@bar.com', password: 'bar2', emailVerified: true};
  var validCredentialsWithTTL = {email: 'foo@bar.com', password: 'bar', ttl: 3600};
  var invalidCredentials = {email: 'foo1@bar.com', password: 'invalid'};
  var incompleteCredentials = {password: 'bar1'};

  beforeEach(function() {
    User = loopback.User.extend('user');
    User.email = loopback.Email.extend('email');
    loopback.autoAttach();

    // Update the AccessToken relation to use the subclass of User
    AccessToken.belongsTo(User);

    // allow many User.afterRemote's to be called
    User.setMaxListeners(0);

  });

  beforeEach(function(done) {
    app.enableAuth();
    app.use(loopback.token());
    app.use(loopback.rest());
    app.model(User);

    User.create(validCredentials, function(err, user) {
      User.create(validCredentialsEmailVerified, done);
    });
  });

  afterEach(function(done) {
    User.destroyAll(function(err) {
      User.accessToken.destroyAll(done);
    });
  });

  describe('User.create', function() {
    it('Create a new user', function(done) {
      User.create({email: 'f@b.com', password: 'bar'}, function(err, user) {
        assert(!err);
        assert(user.id);
        assert(user.email);
        done();
      });
    });

    it('credentials/challenges are object types', function(done) {
      User.create({email: 'f1@b.com', password: 'bar1',
        credentials: {cert: 'xxxxx', key: '111'},
        challenges: {x: 'X', a: 1}
      }, function(err, user) {
        assert(!err);
        User.findById(user.id, function(err, user) {
          assert(user.id);
          assert(user.email);
          assert.deepEqual(user.credentials, {cert: 'xxxxx', key: '111'});
          assert.deepEqual(user.challenges, {x: 'X', a: 1});
          done();
        });
      });
    });

    it('Email is required', function(done) {
      User.create({password: '123'}, function(err) {
        assert(err);
        assert.equal(err.name, 'ValidationError');
        assert.equal(err.statusCode, 422);
        assert.equal(err.details.context, 'user');
        assert.deepEqual(err.details.codes.email, [
          'presence',
          'format.blank'
        ]);

        done();
      });
    });

    // will change in future versions where password will be optional by default
    it('Password is required', function(done) {
      var u = new User({email: '123@456.com'});

      User.create({email: 'c@d.com'}, function(err) {
        assert(err);
        done();
      });
    });

    it('Requires a valid email', function(done) {
      User.create({email: 'foo@', password: '123'}, function(err) {
        assert(err);
        done();
      });
    });

    it('Requires a unique email', function(done) {
      User.create({email: 'a@b.com', password: 'foobar'}, function() {
        User.create({email: 'a@b.com', password: 'batbaz'}, function(err) {
          assert(err, 'should error because the email is not unique!');
          done();
        });
      });
    });

    it('Requires a unique username', function(done) {
      User.create({email: 'a@b.com', username: 'abc', password: 'foobar'}, function() {
        User.create({email: 'b@b.com', username: 'abc',  password: 'batbaz'}, function(err) {
          assert(err, 'should error because the username is not unique!');
          done();
        });
      });
    });

    it('Requires a password to login with basic auth', function(done) {
      User.create({email: 'b@c.com'}, function(err) {
        User.login({email: 'b@c.com'}, function(err, accessToken) {
          assert(!accessToken, 'should not create a accessToken without a valid password');
          assert(err, 'should not login without a password');
          done();
        });
      });
    });

    it('Hashes the given password', function() {
      var u = new User({username: 'foo', password: 'bar'});
      assert(u.password !== 'bar');
    });

    describe('custom password hash', function() {
      var defaultHashPassword;
      var defaultValidatePassword;

      beforeEach(function() {
        defaultHashPassword = User.hashPassword;
        defaultValidatePassword = User.defaultValidatePassword;

        User.hashPassword = function(plain) {
          return plain.toUpperCase();
        };

        User.validatePassword = function(plain) {
          if (!plain || plain.length < 3) {
            throw new Error('Password must have at least 3 chars');
          }
          return true;
        };
      });

      afterEach(function() {
        User.hashPassword = defaultHashPassword;
      });

      it('Reports invalid password', function() {
        try {
          var u = new User({username: 'foo', password: 'aa'});
          assert(false, 'Error should have been thrown');
        } catch (e) {
          // Ignore
        }
      });

      it('Hashes the given password', function() {
        var u = new User({username: 'foo', password: 'bar'});
        assert(u.password === 'BAR');
      });
    });

    it('Create a user over REST should remove emailVerified property', function(done) {
      request(app)
        .post('/users')
        .expect('Content-Type', /json/)
        .expect(200)
        .send(validCredentialsEmailVerifiedOverREST)
        .end(function(err, res) {
          if (err) {
            return done(err);
          }
          assert(!res.body.emailVerified);
          done();
        });
    });
  });

  describe('User.login', function() {
    it('Login a user by providing credentials', function(done) {
      User.login(validCredentials, function(err, accessToken) {
        assert(accessToken.userId);
        assert(accessToken.id);
        assert.equal(accessToken.id.length, 64);

        done();
      });
    });

    it('Login a user by providing credentials with TTL', function(done) {
      User.login(validCredentialsWithTTL, function(err, accessToken) {
        assert(accessToken.userId);
        assert(accessToken.id);
        assert.equal(accessToken.ttl, validCredentialsWithTTL.ttl);
        assert.equal(accessToken.id.length, 64);

        done();
      });
    });

    it('Login a user using a custom createAccessToken', function(done) {
      var createToken = User.prototype.createAccessToken; // Save the original method
      // Override createAccessToken
      User.prototype.createAccessToken = function(ttl, cb) {
        // Reduce the ttl by half for testing purpose
        this.accessTokens.create({ttl: ttl / 2 }, cb);
      };
      User.login(validCredentialsWithTTL, function(err, accessToken) {
        assert(accessToken.userId);
        assert(accessToken.id);
        assert.equal(accessToken.ttl, 1800);
        assert.equal(accessToken.id.length, 64);

        User.findById(accessToken.userId, function(err, user) {
          user.createAccessToken(120, function(err, accessToken) {
            assert(accessToken.userId);
            assert(accessToken.id);
            assert.equal(accessToken.ttl, 60);
            assert.equal(accessToken.id.length, 64);
            // Restore create access token
            User.prototype.createAccessToken = createToken;
            done();
          });
        });
      });
    });

    it('Login should only allow correct credentials', function(done) {
      User.login(invalidCredentials, function(err, accessToken) {
        assert(err);
        assert(!accessToken);
        done();
      });
    });

    it('Login a user over REST by providing credentials', function(done) {
      request(app)
        .post('/users/login')
        .expect('Content-Type', /json/)
        .expect(200)
        .send(validCredentials)
        .end(function(err, res) {
          if (err) {
            return done(err);
          }
          var accessToken = res.body;

          assert(accessToken.userId);
          assert(accessToken.id);
          assert.equal(accessToken.id.length, 64);
          assert(accessToken.user === undefined);

          done();
        });
    });

    it('Login a user over REST by providing invalid credentials', function(done) {
      request(app)
        .post('/users/login')
        .expect('Content-Type', /json/)
        .expect(401)
        .send(invalidCredentials)
        .end(function(err, res) {
          if (err) {
            return done(err);
          }
          done();
        });
    });

    it('Login a user over REST by providing incomplete credentials', function(done) {
      request(app)
        .post('/users/login')
        .expect('Content-Type', /json/)
        .expect(400)
        .send(incompleteCredentials)
        .end(function(err, res) {
          if (err) {
            return done(err);
          }
          done();
        });
    });

    it('Login a user over REST with the wrong Content-Type', function(done) {
      request(app)
        .post('/users/login')
        .set('Content-Type', null)
        .expect('Content-Type', /json/)
        .expect(400)
        .send(JSON.stringify(validCredentials))
        .end(function(err, res) {
          if (err) {
            return done(err);
          }
          done();
        });
    });

    it('Returns current user when `include` is `USER`', function(done) {
      request(app)
        .post('/users/login?include=USER')
        .send(validCredentials)
        .expect(200)
        .expect('Content-Type', /json/)
        .end(function(err, res) {
          if (err) {
            return done(err);
          }
          var token = res.body;
          expect(token.user, 'body.user').to.not.equal(undefined);
          expect(token.user, 'body.user')
            .to.have.property('email', validCredentials.email);
          done();
        });
    });

    it('should handle multiple `include`', function(done) {
      request(app)
        .post('/users/login?include=USER&include=Post')
        .send(validCredentials)
        .expect(200)
        .expect('Content-Type', /json/)
        .end(function(err, res) {
          if (err) {
            return done(err);
          }
          var token = res.body;
          expect(token.user, 'body.user').to.not.equal(undefined);
          expect(token.user, 'body.user')
            .to.have.property('email', validCredentials.email);
          done();
        });
    });

  });

  function assertGoodToken(accessToken) {
    assert(accessToken.userId);
    assert(accessToken.id);
    assert.equal(accessToken.id.length, 64);
  }

  describe('User.login requiring email verification', function() {
    beforeEach(function() {
      User.settings.emailVerificationRequired = true;
    });

    afterEach(function() {
      User.settings.emailVerificationRequired = false;
    });

    it('Login a user by without email verification', function(done) {
      User.login(validCredentials, function(err, accessToken) {
        assert(err);
        done();
      });
    });

    it('Login a user by with email verification', function(done) {
      User.login(validCredentialsEmailVerified, function(err, accessToken) {
        assertGoodToken(accessToken);
        done();
      });
    });

    it('Login a user over REST when email verification is required', function(done) {
      request(app)
        .post('/users/login')
        .expect('Content-Type', /json/)
        .expect(200)
        .send(validCredentialsEmailVerified)
        .end(function(err, res) {
          if (err) {
            return done(err);
          }
          var accessToken = res.body;

          assertGoodToken(accessToken);
          assert(accessToken.user === undefined);

          done();
        });
    });

    it('Login a user over REST without email verification when it is required', function(done) {
      request(app)
        .post('/users/login')
        .expect('Content-Type', /json/)
        .expect(401)
        .send(validCredentials)
        .end(function(err, res) {
          if (err) {
            return done(err);
          }
          done();
        });
    });

  });

  describe('User.login requiring realm', function() {
    var User;
    var AccessToken;

    before(function() {
      User = loopback.User.extend('RealmUser', {},
        {realmRequired: true, realmDelimiter: ':'});
      AccessToken = loopback.AccessToken.extend('RealmAccessToken');

      loopback.autoAttach();

      // Update the AccessToken relation to use the subclass of User
      AccessToken.belongsTo(User);
      User.hasMany(AccessToken);

      // allow many User.afterRemote's to be called
      User.setMaxListeners(0);
    });

    var realm1User = {
      realm: 'realm1',
      username: 'foo100',
      email: 'foo100@bar.com',
      password: 'pass100'
    };

    var realm2User = {
      realm: 'realm2',
      username: 'foo100',
      email: 'foo100@bar.com',
      password: 'pass200'
    };

    var credentialWithoutRealm = {
      username: 'foo100',
      email: 'foo100@bar.com',
      password: 'pass100'
    };

    var credentialWithBadPass = {
      realm: 'realm1',
      username: 'foo100',
      email: 'foo100@bar.com',
      password: 'pass001'
    };

    var credentialWithBadRealm = {
      realm: 'realm3',
      username: 'foo100',
      email: 'foo100@bar.com',
      password: 'pass100'
    };

    var credentialWithRealm = {
      realm: 'realm1',
      username: 'foo100',
      password: 'pass100'
    };

    var credentialRealmInUsername = {
      username: 'realm1:foo100',
      password: 'pass100'
    };

    var credentialRealmInEmail = {
      email: 'realm1:foo100@bar.com',
      password: 'pass100'
    };

    var user1;
    beforeEach(function(done) {
      User.create(realm1User, function(err, u) {
        if (err) {
          return done(err);
        }
        user1 = u;
        User.create(realm2User, done);
      });
    });

    afterEach(function(done) {
      User.deleteAll({realm: 'realm1'}, function(err) {
        if (err) {
          return done(err);
        }
        User.deleteAll({realm: 'realm2'}, done);
      });
    });

    it('rejects a user by without realm', function(done) {
      User.login(credentialWithoutRealm, function(err, accessToken) {
        assert(err);
        done();
      });
    });

    it('rejects a user by with bad realm', function(done) {
      User.login(credentialWithBadRealm, function(err, accessToken) {
        assert(err);
        done();
      });
    });

    it('rejects a user by with bad pass', function(done) {
      User.login(credentialWithBadPass, function(err, accessToken) {
        assert(err);
        done();
      });
    });

    it('logs in a user by with realm', function(done) {
      User.login(credentialWithRealm, function(err, accessToken) {
        assertGoodToken(accessToken);
        assert.equal(accessToken.userId, user1.id);
        done();
      });
    });

    it('logs in a user by with realm in username', function(done) {
      User.login(credentialRealmInUsername, function(err, accessToken) {
        assertGoodToken(accessToken);
        assert.equal(accessToken.userId, user1.id);
        done();
      });
    });

    it('logs in a user by with realm in email', function(done) {
      User.login(credentialRealmInEmail, function(err, accessToken) {
        assertGoodToken(accessToken);
        assert.equal(accessToken.userId, user1.id);
        done();
      });
    });

    describe('User.login with realmRequired but no realmDelimiter', function() {
      before(function() {
        User.settings.realmDelimiter = undefined;
      });

      after(function() {
        User.settings.realmDelimiter = ':';
      });

      it('logs in a user by with realm', function(done) {
        User.login(credentialWithRealm, function(err, accessToken) {
          assertGoodToken(accessToken);
          assert.equal(accessToken.userId, user1.id);
          done();
        });
      });

      it('rejects a user by with realm in email if realmDelimiter is not set',
        function(done) {
          User.login(credentialRealmInEmail, function(err, accessToken) {
            assert(err);
            done();
          });
        });
    });
  });

  describe('User.logout', function() {
    it('Logout a user by providing the current accessToken id (using node)', function(done) {
      login(logout);

      function login(fn) {
        User.login({email: 'foo@bar.com', password: 'bar'}, fn);
      }

      function logout(err, accessToken) {
        User.logout(accessToken.id, verify(accessToken.id, done));
      }
    });

    it('Logout a user by providing the current accessToken id (over rest)', function(done) {
      login(logout);
      function login(fn) {
        request(app)
          .post('/users/login')
          .expect('Content-Type', /json/)
          .expect(200)
          .send({email: 'foo@bar.com', password: 'bar'})
          .end(function(err, res) {
            if (err) {
              return done(err);
            }
            var accessToken = res.body;

            assert(accessToken.userId);
            assert(accessToken.id);

            fn(null, accessToken.id);
          });
      }

      function logout(err, token) {
        request(app)
          .post('/users/logout')
          .set('Authorization', token)
          .expect(204)
          .end(verify(token, done));
      }
    });

    function verify(token, done) {
      assert(token);

      return function(err) {
        if (err) {
          return done(err);
        }

        AccessToken.findById(token, function(err, accessToken) {
          assert(!accessToken, 'accessToken should not exist after logging out');
          done(err);
        });
      };
    }
  });

  describe('user.hasPassword(plain, fn)', function() {
    it('Determine if the password matches the stored password', function(done) {
      var u = new User({username: 'foo', password: 'bar'});
      u.hasPassword('bar', function(err, isMatch) {
        assert(isMatch, 'password doesnt match');
        done();
      });
    });

    it('should match a password when saved', function(done) {
      var u = new User({username: 'a', password: 'b', email: 'z@z.net'});

      u.save(function(err, user) {
        User.findById(user.id, function(err, uu) {
          uu.hasPassword('b', function(err, isMatch) {
            assert(isMatch);
            done();
          });
        });
      });
    });

    it('should match a password after it is changed', function(done) {
      User.create({email: 'foo@baz.net', username: 'bat', password: 'baz'}, function(err, user) {
        User.findById(user.id, function(err, foundUser) {
          assert(foundUser);
          foundUser.hasPassword('baz', function(err, isMatch) {
            assert(isMatch);
            foundUser.password = 'baz2';
            foundUser.save(function(err, updatedUser) {
              updatedUser.hasPassword('baz2', function(err, isMatch) {
                assert(isMatch);
                User.findById(user.id, function(err, uu) {
                  uu.hasPassword('baz2', function(err, isMatch) {
                    assert(isMatch);
                    done();
                  });
                });
              });
            });
          });
        });
      });
    });
  });

  describe('Verification', function() {

    describe('user.verify(options, fn)', function() {
      it('Verify a user\'s email address', function(done) {
        User.afterRemote('create', function(ctx, user, next) {
          assert(user, 'afterRemote should include result');

          var options = {
            type: 'email',
            to: user.email,
            from: 'noreply@myapp.org',
            redirect: '/',
            protocol: ctx.req.protocol,
            host: ctx.req.get('host')
          };

          user.verify(options, function(err, result) {
            assert(result.email);
            assert(result.email.response);
            assert(result.token);
            var msg = result.email.response.toString('utf-8');
            assert(~msg.indexOf('/api/users/confirm'));
            assert(~msg.indexOf('To: bar@bat.com'));
            done();
          });
        });

        request(app)
          .post('/users')
          .expect('Content-Type', /json/)
          .expect(200)
          .send({email: 'bar@bat.com', password: 'bar'})
          .end(function(err, res) {
            if (err) {
              return done(err);
            }
          });
      });

      it('Verify a user\'s email address with custom header', function(done) {
        User.afterRemote('create', function(ctx, user, next) {
          assert(user, 'afterRemote should include result');

          var options = {
            type: 'email',
            to: user.email,
            from: 'noreply@myapp.org',
            redirect: '/',
            protocol: ctx.req.protocol,
            host: ctx.req.get('host'),
            headers: {'message-id':'custom-header-value'}
          };

          user.verify(options, function(err, result) {
            assert(result.email);
            assert.equal(result.email.messageId, 'custom-header-value');
            done();
          });
        });

        request(app)
          .post('/users')
          .expect('Content-Type', /json/)
          .expect(200)
          .send({email: 'bar@bat.com', password: 'bar'})
          .end(function(err, res) {
            if (err) {
              return done(err);
            }
          });
      });

    });

    describe('User.confirm(options, fn)', function() {
      var options;

      function testConfirm(testFunc, done) {
        User.afterRemote('create', function(ctx, user, next) {
          assert(user, 'afterRemote should include result');

          options = {
            type: 'email',
            to: user.email,
            from: 'noreply@myapp.org',
            redirect: 'http://foo.com/bar',
            protocol: ctx.req.protocol,
            host: ctx.req.get('host')
          };

          user.verify(options, function(err, result) {
            if (err) {
              return done(err);
            }
            testFunc(result, done);
          });
        });

        request(app)
          .post('/users')
          .expect('Content-Type', /json/)
          .expect(302)
          .send({email: 'bar@bat.com', password: 'bar'})
          .end(function(err, res) {
            if (err) {
              return done(err);
            }
          });
      }

      it('Confirm a user verification', function(done) {
        testConfirm(function(result, done) {
          request(app)
            .get('/users/confirm?uid=' + (result.uid)
              + '&token=' + encodeURIComponent(result.token)
              + '&redirect=' + encodeURIComponent(options.redirect))
            .expect(302)
            .end(function(err, res) {
              if (err) {
                return done(err);
              }
              done();
            });
        }, done);
      });

      it('Report error for invalid user id during verification', function(done) {
        testConfirm(function(result, done) {
          request(app)
            .get('/users/confirm?uid=' + (result.uid + '_invalid')
              + '&token=' + encodeURIComponent(result.token)
              + '&redirect=' + encodeURIComponent(options.redirect))
            .expect(404)
            .end(function(err, res) {
              if (err) {
                return done(err);
              }
              assert(res.body.error);
              done();
            });
        }, done);
      });

      it('Report error for invalid token during verification', function(done) {
        testConfirm(function(result, done) {
          request(app)
            .get('/users/confirm?uid=' + result.uid
              + '&token=' + encodeURIComponent(result.token) + '_invalid'
              + '&redirect=' + encodeURIComponent(options.redirect))
            .expect(400)
            .end(function(err, res) {
              if (err) {
                return done(err);
              }
              assert(res.body.error);
              done();
            });
        }, done);
      });
    });
  });

  describe('Password Reset', function() {
    describe('User.resetPassword(options, cb)', function() {
      var email = 'foo@bar.com';

      it('Requires email address to reset password', function(done) {
        User.resetPassword({ }, function(err) {
          assert(err);
          done();
        });
      });

      it('Creates a temp accessToken to allow a user to change password', function(done) {
        var calledBack = false;

        User.resetPassword({
          email: email
        }, function() {
          calledBack = true;
        });

        User.once('resetPasswordRequest', function(info) {
          assert(info.email);
          assert(info.accessToken);
          assert(info.accessToken.id);
          assert.equal(info.accessToken.ttl / 60, 15);
          assert(calledBack);
          info.accessToken.user(function(err, user) {
            assert.equal(user.email, email);
            done();
          });
        });
      });

      it('Password reset over REST rejected without email address', function(done) {
        request(app)
          .post('/users/reset')
          .expect('Content-Type', /json/)
          .expect(400)
          .send({ })
          .end(function(err, res) {
            if (err) {
              return done(err);
            }
            done();
          });
      });

      it('Password reset over REST requires email address', function(done) {
        request(app)
          .post('/users/reset')
          .expect('Content-Type', /json/)
          .expect(204)
          .send({ email: email })
          .end(function(err, res) {
            if (err) {
              return done(err);
            }
            assert.deepEqual(res.body, { });
            done();
          });
      });
    });
  });

  describe('ctor', function() {
    it('exports default Email model', function() {
      expect(User.email, 'User.email').to.be.a('function');
      expect(User.email.modelName, 'modelName').to.eql('email');
    });

    it('exports default AccessToken model', function() {
      expect(User.accessToken, 'User.accessToken').to.be.a('function');
      expect(User.accessToken.modelName, 'modelName').to.eql('AccessToken');
    });
  });

  describe('ttl', function() {
    var User2;
    beforeEach(function() {
      User2 = loopback.User.extend('User2', {}, { ttl: 10 });
    });
    it('should override ttl setting in based User model', function() {
      expect(User2.settings.ttl).to.equal(10);
    });
  });
});