# frozen_string_literal: true

require "rotp"

RSpec.describe UsersEmailController do
  fab!(:user) { Fabricate(:user) }
  let!(:email_token) { Fabricate(:email_token, user: user) }
  fab!(:moderator) { Fabricate(:moderator) }

  describe "#confirm-new-email" do
    it "does not redirect to login for signed out accounts, this route works fine as anon user" do
      get "/u/confirm-new-email/invalidtoken"

      expect(response.status).to eq(200)
    end

    it "does not redirect to login for signed out accounts on login_required sites, this route works fine as anon user" do
      SiteSetting.login_required = true
      get "/u/confirm-new-email/invalidtoken"

      expect(response.status).to eq(200)
    end

    it "errors out for invalid tokens" do
      sign_in(user)

      get "/u/confirm-new-email/invalidtoken"

      expect(response.status).to eq(200)
      expect(response.body).to include(I18n.t("change_email.already_done"))
    end

    it "does not change email if accounts mismatch for a signed in user" do
      updater = EmailUpdater.new(guardian: user.guardian, user: user)
      updater.change_to("bubblegum@adventuretime.ooo")

      old_email = user.email

      sign_in(moderator)

      put "/u/confirm-new-email", params: { token: "#{email_token.token}" }
      expect(user.reload.email).to eq(old_email)
    end

    context "with a valid user" do
      let(:updater) { EmailUpdater.new(guardian: user.guardian, user: user) }

      before do
        sign_in(user)
        updater.change_to("bubblegum@adventuretime.ooo")
      end

      it "includes security_key_allowed_credential_ids in a hidden field" do
        key1 = Fabricate(:user_security_key_with_random_credential, user: user)
        key2 = Fabricate(:user_security_key_with_random_credential, user: user)

        get "/u/confirm-new-email/#{updater.change_req.new_email_token.token}"

        doc = Nokogiri.HTML5(response.body)
        credential_ids = doc.css("#security-key-allowed-credential-ids").first["value"].split(",")
        expect(credential_ids).to contain_exactly(key1.credential_id, key2.credential_id)
      end

      it "confirms with a correct token" do
        user.user_stat.update_columns(bounce_score: 42, reset_bounce_score_after: 1.week.from_now)

        put "/u/confirm-new-email", params: { token: "#{updater.change_req.new_email_token.token}" }

        expect(response.status).to eq(302)
        expect(response.redirect_url).to include("done")
        user.reload
        expect(user.user_stat.bounce_score).to eq(0)
        expect(user.user_stat.reset_bounce_score_after).to eq(nil)
        expect(user.email).to eq("bubblegum@adventuretime.ooo")
      end

      context "when second factor is required" do
        fab!(:second_factor) { Fabricate(:user_second_factor_totp, user: user) }
        fab!(:backup_code) { Fabricate(:user_second_factor_backup, user: user) }

        it "requires a second factor token" do
          get "/u/confirm-new-email/#{updater.change_req.new_email_token.token}"

          expect(response.status).to eq(200)
          expect(response.body).to include(I18n.t("login.second_factor_title"))
          expect(response.body).not_to include(I18n.t("login.invalid_second_factor_code"))
        end

        it "requires a backup token" do
          get "/u/confirm-new-email/#{updater.change_req.new_email_token.token}?show_backup=true"

          expect(response.status).to eq(200)
          expect(response.body).to include(I18n.t("login.second_factor_backup_title"))
        end

        it "adds an error on a second factor attempt" do
          put "/u/confirm-new-email",
              params: {
                token: updater.change_req.new_email_token.token,
                second_factor_token: "000000",
                second_factor_method: UserSecondFactor.methods[:totp],
              }

          expect(response.status).to eq(302)
          expect(flash[:invalid_second_factor]).to eq(true)
        end

        it "confirms with a correct second token" do
          put "/u/confirm-new-email",
              params: {
                second_factor_token: ROTP::TOTP.new(second_factor.data).now,
                second_factor_method: UserSecondFactor.methods[:totp],
                token: updater.change_req.new_email_token.token,
              }

          expect(response.status).to eq(302)
          expect(user.reload.email).to eq("bubblegum@adventuretime.ooo")
        end

        context "with rate limiting" do
          before { RateLimiter.enable }

          use_redis_snapshotting

          it "rate limits by IP" do
            freeze_time

            6.times do
              put "/u/confirm-new-email",
                  params: {
                    token: "blah",
                    second_factor_token: "000000",
                    second_factor_method: UserSecondFactor.methods[:totp],
                  }

              expect(response.status).to eq(302)
            end

            put "/u/confirm-new-email",
                params: {
                  token: "blah",
                  second_factor_token: "000000",
                  second_factor_method: UserSecondFactor.methods[:totp],
                }

            expect(response.status).to eq(429)
          end

          it "rate limits by username" do
            freeze_time

            6.times do |x|
              user.email_change_requests.last.update(
                change_state: EmailChangeRequest.states[:complete],
              )
              put "/u/confirm-new-email",
                  params: {
                    token: updater.change_req.new_email_token.token,
                    second_factor_token: "000000",
                    second_factor_method: UserSecondFactor.methods[:totp],
                  },
                  env: {
                    REMOTE_ADDR: "1.2.3.#{x}",
                  }

              expect(response.status).to eq(302)
            end

            user.email_change_requests.last.update(
              change_state: EmailChangeRequest.states[:authorizing_new],
            )
            put "/u/confirm-new-email",
                params: {
                  token: updater.change_req.new_email_token.token,
                  second_factor_token: "000000",
                  second_factor_method: UserSecondFactor.methods[:totp],
                },
                env: {
                  REMOTE_ADDR: "1.2.3.4",
                }

            expect(response.status).to eq(429)
          end
        end
      end

      context "when security key is required" do
        fab!(:user_security_key) do
          Fabricate(
            :user_security_key,
            user: user,
            credential_id: valid_security_key_data[:credential_id],
            public_key: valid_security_key_data[:public_key],
          )
        end

        before { simulate_localhost_webauthn_challenge }

        it "requires a security key" do
          get "/u/confirm-new-email/#{updater.change_req.new_email_token.token}"

          expect(response.status).to eq(200)
          expect(response.body).to include(I18n.t("login.security_key_authenticate"))
          expect(response.body).to include(I18n.t("login.security_key_description"))
        end

        context "if the user has a TOTP enabled and wants to use that instead" do
          before { Fabricate(:user_second_factor_totp, user: user) }

          it "allows entering the totp code instead" do
            get "/u/confirm-new-email/#{updater.change_req.new_email_token.token}?show_totp=true"

            expect(response.status).to eq(200)
            expect(response.body).to include(I18n.t("login.second_factor_title"))
            expect(response.body).not_to include(I18n.t("login.security_key_authenticate"))
          end
        end

        it "adds an error on a security key attempt" do
          get "/u/confirm-new-email/#{updater.change_req.new_email_token.token}"
          put "/u/confirm-new-email",
              params: {
                token: updater.change_req.new_email_token.token,
                second_factor_token: "{}",
                second_factor_method: UserSecondFactor.methods[:security_key],
              }

          expect(response.status).to eq(302)
          expect(flash[:invalid_second_factor]).to eq(true)
        end

        it "confirms with a correct security key token" do
          get "/u/confirm-new-email/#{updater.change_req.new_email_token.token}"
          put "/u/confirm-new-email",
              params: {
                token: updater.change_req.new_email_token.token,
                second_factor_token: valid_security_key_auth_post_data.to_json,
                second_factor_method: UserSecondFactor.methods[:security_key],
              }

          expect(response.status).to eq(302)
          expect(user.reload.email).to eq("bubblegum@adventuretime.ooo")
        end

        context "if the security key data JSON is garbled" do
          it "raises an invalid parameters error" do
            get "/u/confirm-new-email/#{updater.change_req.new_email_token.token}"
            put "/u/confirm-new-email",
                params: {
                  token: updater.change_req.new_email_token.token,
                  second_factor_token: "{someweird: 8notjson}",
                  second_factor_method: UserSecondFactor.methods[:security_key],
                }

            expect(response.status).to eq(400)
          end
        end
      end
    end

    it "destroys email tokens associated with the old email after the new email is confirmed" do
      SiteSetting.enable_secondary_emails = true

      email_token =
        user.email_tokens.create!(email: user.email, scope: EmailToken.scopes[:password_reset])

      updater = EmailUpdater.new(guardian: user.guardian, user: user)
      updater.change_to("bubblegum@adventuretime.ooo")

      sign_in(user)
      put "/u/confirm-new-email", params: { token: "#{updater.change_req.new_email_token.token}" }

      new_password = SecureRandom.hex
      put "/u/password-reset/#{email_token.token}.json", params: { password: new_password }
      expect(response.parsed_body["success"]).to eq(false)
      expect(response.parsed_body["message"]).to eq(
        I18n.t("password_reset.no_token", base_url: Discourse.base_url),
      )
      expect(user.reload.confirm_password?(new_password)).to eq(false)
    end
  end

  describe "#confirm-old-email" do
    it "redirects to login for signed out accounts" do
      get "/u/confirm-old-email/invalidtoken"

      expect(response.status).to eq(302)
      expect(response.redirect_url).to eq("http://test.localhost/login")
    end

    it "errors out for invalid tokens" do
      sign_in(user)

      get "/u/confirm-old-email/invalidtoken"

      expect(response.status).to eq(200)
      expect(response.body).to include(I18n.t("change_email.already_done"))
    end

    it "bans change when accounts do not match" do
      sign_in(user)
      updater = EmailUpdater.new(guardian: moderator.guardian, user: moderator)
      email_change_request = updater.change_to("bubblegum@adventuretime.ooo")

      get "/u/confirm-old-email/#{email_change_request.old_email_token.token}"

      expect(response.status).to eq(200)
      expect(body).to include("alert-error")
    end

    context "with valid old token" do
      it "confirms with a correct token" do
        sign_in(moderator)
        updater = EmailUpdater.new(guardian: moderator.guardian, user: moderator)
        email_change_request = updater.change_to("bubblegum@adventuretime.ooo")

        get "/u/confirm-old-email/#{email_change_request.old_email_token.token}"

        expect(response.status).to eq(200)
        body = CGI.unescapeHTML(response.body)
        expect(body).to include(I18n.t("change_email.authorizing_old.title"))
        expect(body).to include(I18n.t("change_email.authorizing_old.description"))

        put "/u/confirm-old-email", params: { token: email_change_request.old_email_token.token }

        expect(response.status).to eq(302)
        expect(response.redirect_url).to include("done=true")
      end
    end
  end

  describe "#create" do
    it "has an email token" do
      sign_in(user)

      expect {
        post "/u/#{user.username}/preferences/email.json",
             params: {
               email: "bubblegum@adventuretime.ooo",
             }
      }.to change(EmailChangeRequest, :count)

      emailChangeRequest = EmailChangeRequest.last
      expect(emailChangeRequest.old_email).to eq(nil)
      expect(emailChangeRequest.new_email).to eq("bubblegum@adventuretime.ooo")
    end
  end

  describe "#update" do
    it "requires you to be logged in" do
      put "/u/#{user.username}/preferences/email.json",
          params: {
            email: "bubblegum@adventuretime.ooo",
          }
      expect(response.status).to eq(403)
    end

    context "when logged in" do
      before { sign_in(user) }

      it "raises an error without an email parameter" do
        put "/u/#{user.username}/preferences/email.json"
        expect(response.status).to eq(400)
      end

      it "raises an error without an invalid email" do
        put "/u/#{user.username}/preferences/email.json", params: { email: "sam@not-email.com'" }
        expect(response.status).to eq(422)
        expect(response.body).to include("Email is invalid")
      end

      it "raises an error if you can't edit the user's email" do
        SiteSetting.email_editable = false

        put "/u/#{user.username}/preferences/email.json",
            params: {
              email: "bubblegum@adventuretime.ooo",
            }
        expect(response).to be_forbidden
      end

      context "when the new email address is taken" do
        fab!(:other_user) { Fabricate(:coding_horror) }

        context "when hide_email_address_taken is disabled" do
          before { SiteSetting.hide_email_address_taken = false }

          it "raises an error" do
            put "/u/#{user.username}/preferences/email.json", params: { email: other_user.email }
            expect(response).to_not be_successful
          end

          it "raises an error if there is whitespace too" do
            put "/u/#{user.username}/preferences/email.json",
                params: {
                  email: "#{other_user.email} ",
                }
            expect(response).to_not be_successful
          end
        end

        context "when hide_email_address_taken is enabled" do
          before { SiteSetting.hide_email_address_taken = true }

          it "responds with success" do
            put "/u/#{user.username}/preferences/email.json", params: { email: other_user.email }
            expect(response.status).to eq(200)
          end
        end
      end

      context "when new email is different case of existing email" do
        fab!(:other_user) { Fabricate(:user, email: "case.insensitive@gmail.com") }

        it "raises an error" do
          put "/u/#{user.username}/preferences/email.json",
              params: {
                email: other_user.email.upcase,
              }
          expect(response).to_not be_successful
        end
      end

      it "raises an error when new email domain is present in blocked_email_domains site setting" do
        SiteSetting.blocked_email_domains = "mailinator.com"

        put "/u/#{user.username}/preferences/email.json",
            params: {
              email: "not_good@mailinator.com",
            }
        expect(response).to_not be_successful
      end

      it "raises an error when new email domain is not present in allowed_email_domains site setting" do
        SiteSetting.allowed_email_domains = "discourse.org"

        put "/u/#{user.username}/preferences/email.json",
            params: {
              email: "bubblegum@adventuretime.ooo",
            }
        expect(response).to_not be_successful
      end

      context "with success" do
        it "has an email token" do
          expect do
            put "/u/#{user.username}/preferences/email.json",
                params: {
                  email: "bubblegum@adventuretime.ooo",
                }
          end.to change(EmailChangeRequest, :count)
        end
      end
    end
  end
end