# frozen_string_literal: true

require 'spec_helper'

RSpec.describe WebHooks::LogExecutionService do
  include ExclusiveLeaseHelpers
  using RSpec::Parameterized::TableSyntax

  describe '#execute' do
    around do |example|
      travel_to(Time.current) { example.run }
    end

    let_it_be_with_reload(:project_hook) { create(:project_hook, :token) }

    let(:response_category) { :ok }
    let(:request_headers) { { 'Header' => 'header value' } }
    let(:data) do
      {
        trigger: 'trigger_name',
        url: 'https://example.com',
        request_headers: request_headers,
        request_data: { 'Request Data' => 'request data value' },
        response_body: 'Response body',
        response_status: '200',
        execution_duration: 1.2,
        internal_error_message: 'error message'
      }
    end

    subject(:service) { described_class.new(hook: project_hook, log_data: data, response_category: response_category) }

    it 'logs the data' do
      expect { service.execute }.to change(::WebHookLog, :count).by(1)

      expect(WebHookLog.recent.first).to have_attributes(data)
    end

    it 'updates the last failure' do
      expect(project_hook).to receive(:update_last_failure)

      service.execute
    end

    it 'does not update the last failure when the feature flag is disabled' do
      stub_feature_flags(web_hooks_disable_failed: false)

      expect(project_hook).not_to receive(:update_last_failure)

      service.execute
    end

    context 'obtaining an exclusive lease' do
      let(:lease_key) { "web_hooks:update_hook_failure_state:#{project_hook.id}" }

      it 'updates failure state using a lease that ensures fresh state is written' do
        service = described_class.new(hook: project_hook, log_data: data, response_category: :error)
        # Write state somewhere else, so that the hook is out-of-date
        WebHook.find(project_hook.id).update!(recent_failures: 5, disabled_until: 10.minutes.from_now, backoff_count: 1)

        lease = stub_exclusive_lease(lease_key, timeout: described_class::LOCK_TTL)

        expect(lease).to receive(:try_obtain)
        expect(lease).to receive(:cancel)
        expect { service.execute }.to change { WebHook.find(project_hook.id).backoff_count }.to(2)
      end

      context 'when a lease cannot be obtained' do
        where(:response_category, :executable, :needs_updating) do
          :ok     | true  | false
          :ok     | false | true
          :failed | true  | true
          :failed | false | false
          :error  | true  | true
          :error  | false | false
        end

        with_them do
          subject(:service) { described_class.new(hook: project_hook, log_data: data, response_category: response_category) }

          before do
            # stub LOCK_RETRY to be 0 in order for tests to run quicker
            stub_const("#{described_class.name}::LOCK_RETRY", 0)
            stub_exclusive_lease_taken(lease_key, timeout: described_class::LOCK_TTL)
            allow(project_hook).to receive(:executable?).and_return(executable)
          end

          it 'raises an error if the hook needs to be updated' do
            if needs_updating
              expect { service.execute }.to raise_error(Gitlab::ExclusiveLeaseHelpers::FailedToObtainLockError)
            else
              expect { service.execute }.not_to raise_error
            end
          end
        end
      end
    end

    context 'when response_category is :ok' do
      it 'does not increment the failure count' do
        expect { service.execute }.not_to change(project_hook, :recent_failures)
      end

      it 'does not change the disabled_until attribute' do
        expect { service.execute }.not_to change(project_hook, :disabled_until)
      end

      context 'when the hook had previously failed' do
        before do
          project_hook.update!(recent_failures: 2)
        end

        it 'resets the failure count' do
          expect { service.execute }.to change(project_hook, :recent_failures).to(0)
        end
      end
    end

    context 'when response_category is :failed' do
      let(:response_category) { :failed }

      before do
        data[:response_status] = '400'
      end

      it 'increments the failure count' do
        expect { service.execute }.to change(project_hook, :recent_failures).by(1)
      end

      it 'does not change the disabled_until attribute' do
        expect { service.execute }.not_to change(project_hook, :disabled_until)
      end

      it 'does not allow the failure count to overflow' do
        project_hook.update!(recent_failures: 32767)

        expect { service.execute }.not_to change(project_hook, :recent_failures)
      end

      context 'when the web_hooks_disable_failed FF is disabled' do
        before do
          # Hook will only be executed if the flag is disabled.
          stub_feature_flags(web_hooks_disable_failed: false)
        end

        it 'does not allow the failure count to overflow' do
          project_hook.update!(recent_failures: 32767)

          expect { service.execute }.not_to change(project_hook, :recent_failures)
        end
      end
    end

    context 'when response_category is :error' do
      let(:response_category) { :error }

      before do
        data[:response_status] = '500'
      end

      it 'backs off' do
        expect(project_hook).to receive(:backoff!)

        service.execute
      end
    end

    context 'with X-Gitlab-Token' do
      let(:request_headers) { { 'X-Gitlab-Token' => project_hook.token } }

      it 'redacts the token' do
        service.execute

        expect(WebHookLog.recent.first.request_headers).to include('X-Gitlab-Token' => '[REDACTED]')
      end
    end
  end
end