# frozen_string_literal: true

require 'spec_helper'

describe Spam::SpamCheckService do
  let(:fake_ip) { '1.2.3.4' }
  let(:fake_user_agent) { 'fake-user-agent' }
  let(:fake_referrer) { 'fake-http-referrer' }
  let(:env) do
    { 'action_dispatch.remote_ip' => fake_ip,
      'HTTP_USER_AGENT' => fake_user_agent,
      'HTTP_REFERRER' => fake_referrer }
  end
  let(:request) { double(:request, env: env) }

  let_it_be(:project) { create(:project, :public) }
  let_it_be(:user) { create(:user) }
  let_it_be(:issue) { create(:issue, project: project, author: user) }

  before do
    issue.spam = false
  end

  describe '#initialize' do
    subject { described_class.new(spammable: issue, request: request) }

    context 'when the request is nil' do
      let(:request) { nil }

      it 'assembles the options with information from the spammable' do
        aggregate_failures do
          expect(subject.options[:ip_address]).to eq(issue.ip_address)
          expect(subject.options[:user_agent]).to eq(issue.user_agent)
          expect(subject.options.key?(:referrer)).to be_falsey
        end
      end
    end

    context 'when the request is present' do
      let(:request) { double(:request, env: env) }

      it 'assembles the options with information from the spammable' do
        aggregate_failures do
          expect(subject.options[:ip_address]).to eq(fake_ip)
          expect(subject.options[:user_agent]).to eq(fake_user_agent)
          expect(subject.options[:referrer]).to eq(fake_referrer)
        end
      end
    end
  end

  describe '#execute' do
    let(:request) { double(:request, env: env) }

    let_it_be(:existing_spam_log) { create(:spam_log, user: user, recaptcha_verified: false) }

    subject do
      described_service = described_class.new(spammable: issue, request: request)
      described_service.execute(user_id: user.id, api: nil, recaptcha_verified: recaptcha_verified, spam_log_id: existing_spam_log.id)
    end

    context 'when recaptcha was already verified' do
      let(:recaptcha_verified) { true }

      it "updates spam log and doesn't check Akismet" do
        aggregate_failures do
          expect(SpamLog).not_to receive(:create!)
          expect(an_instance_of(described_class)).not_to receive(:check)
        end

        subject
      end

      it 'updates spam log' do
        subject

        expect(existing_spam_log.reload.recaptcha_verified).to be_truthy
      end
    end

    context 'when recaptcha was not verified' do
      let(:recaptcha_verified) { false }

      context 'when spammable attributes have not changed' do
        before do
          issue.closed_at = Time.zone.now

          allow(Spam::AkismetService).to receive(:new).and_return(double(spam?: true))
        end

        it 'returns false' do
          expect(subject).to be_falsey
        end

        it 'does not create a spam log' do
          expect { subject }
            .not_to change { SpamLog.count }
        end
      end

      context 'when spammable attributes have changed' do
        before do
          issue.description = 'SPAM!'
        end

        context 'when indicated as spam by akismet' do
          before do
            allow(Spam::AkismetService).to receive(:new).and_return(double(spam?: true))
          end

          context 'when allow_possible_spam feature flag is false' do
            before do
              stub_feature_flags(allow_possible_spam: false)
            end

            it_behaves_like 'akismet spam'

            it 'checks as spam' do
              subject

              expect(issue.reload.spam).to be_truthy
            end
          end

          context 'when allow_possible_spam feature flag is true' do
            it_behaves_like 'akismet spam'

            it 'does not check as spam' do
              subject

              expect(issue.spam).to be_falsey
            end
          end
        end

        context 'when not indicated as spam by akismet' do
          before do
            allow(Spam::AkismetService).to receive(:new).and_return(double(spam?: false))
          end

          it 'returns false' do
            expect(subject).to be_falsey
          end

          it 'does not create a spam log' do
            expect { subject }
              .not_to change { SpamLog.count }
          end
        end
      end
    end
  end
end