# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Spam::AkismetService do
  let(:fake_akismet_client) { double(:akismet_client) }

  let_it_be(:text) { "Would you like to buy some tinned meat product?" }
  let_it_be(:spam_owner) { create(:user) }

  subject do
    options = { ip_address: '1.2.3.4', user_agent: 'some user_agent', referrer: 'some referrer' }
    described_class.new(spam_owner.name, spam_owner.email, text, options)
  end

  before do
    stub_application_setting(akismet_enabled: true)
    allow(subject).to receive(:akismet_client).and_return(fake_akismet_client)
  end

  shared_examples 'no activity if Akismet is not enabled' do |method_call|
    before do
      stub_application_setting(akismet_enabled: false)
    end

    it 'is automatically false' do
      expect(subject.send(method_call)).to be_falsey
    end

    it 'performs no check' do
      expect(fake_akismet_client).not_to receive(:public_send)

      subject.send(method_call)
    end
  end

  shared_examples 'false if Akismet is not available' do |method_call|
    context 'if Akismet is not available' do
      before do
        allow(fake_akismet_client).to receive(:public_send).and_raise(StandardError.new("oh noes!"))
      end

      specify do
        expect(subject.send(method_call)).to be_falsey
      end

      it 'logs an error' do
        expect(Gitlab::AppLogger).to receive(:error).with(/skipping/)

        subject.send(method_call)
      end
    end
  end

  describe '#spam?' do
    it_behaves_like 'no activity if Akismet is not enabled', :spam?, :check

    context 'if Akismet is enabled' do
      context 'the text is spam' do
        before do
          allow(fake_akismet_client).to receive(:check).and_return([true, false])
        end

        specify do
          expect(subject.spam?).to be_truthy
        end
      end

      context 'the text is blatant spam' do
        before do
          allow(fake_akismet_client).to receive(:check).and_return([false, true])
        end

        specify do
          expect(subject.spam?).to be_truthy
        end
      end

      context 'the text is not spam' do
        before do
          allow(fake_akismet_client).to receive(:check).and_return([false, false])
        end

        specify do
          expect(subject.spam?).to be_falsey
        end
      end

      context 'if Akismet is not available' do
        before do
          allow(fake_akismet_client).to receive(:check).and_raise(StandardError.new("oh noes!"))
        end

        specify do
          expect(subject.spam?).to be_falsey
        end

        it 'logs an error' do
          expect(Gitlab::AppLogger).to receive(:error).with(/skipping check/)

          subject.spam?
        end
      end
    end
  end

  describe '#submit_ham' do
    it_behaves_like 'no activity if Akismet is not enabled', :submit_ham
    it_behaves_like 'false if Akismet is not available', :submit_ham

    context 'if Akismet is available' do
      specify do
        expect(fake_akismet_client).to receive(:public_send).with(:ham, any_args)

        expect(subject.submit_ham).to be_truthy
      end
    end
  end

  describe '#submit_spam' do
    it_behaves_like 'no activity if Akismet is not enabled', :submit_spam
    it_behaves_like 'false if Akismet is not available', :submit_spam

    context 'if Akismet is available' do
      specify do
        expect(fake_akismet_client).to receive(:public_send).with(:spam, any_args)

        expect(subject.submit_spam).to be_truthy
      end
    end
  end
end