# frozen_string_literal: true

require 'spec_helper'

RSpec.describe ContainerExpirationPolicyWorker do
  include ExclusiveLeaseHelpers

  let(:worker) { described_class.new }
  let(:started_at) { nil }

  describe '#perform' do
    subject { worker.perform }

    shared_examples 'not executing any policy' do
      it 'does not run any policy' do
        expect(ContainerExpirationPolicyService).not_to receive(:new)

        subject
      end
    end

    shared_examples 'handling a taken exclusive lease' do
      context 'with exclusive lease taken' do
        before do
          stub_exclusive_lease_taken(worker.lease_key, timeout: 5.hours)
        end

        it 'does not do anything' do
          expect(ContainerExpirationPolicies::CleanupContainerRepositoryWorker).not_to receive(:perform_with_capacity)
          expect(worker).not_to receive(:runnable_policies)

          expect { subject }.not_to change { ContainerRepository.cleanup_scheduled.count }
        end
      end
    end

    context 'With no container expiration policies' do
      context 'with loopless disabled' do
        before do
          stub_feature_flags(container_registry_expiration_policies_loopless: false)
        end

        it 'does not execute any policies' do
          expect(ContainerRepository).not_to receive(:for_project_id)

          expect { subject }.not_to change { ContainerRepository.cleanup_scheduled.count }
        end
      end
    end

    context 'with throttling enabled' do
      before do
        stub_feature_flags(container_registry_expiration_policies_throttling: true)
      end

      context 'with loopless disabled' do
        before do
          stub_feature_flags(container_registry_expiration_policies_loopless: false)
        end

        context 'with container expiration policies' do
          let_it_be(:container_expiration_policy) { create(:container_expiration_policy, :runnable) }
          let_it_be(:container_repository) { create(:container_repository, project: container_expiration_policy.project) }

          before do
            expect(worker).to receive(:with_runnable_policy).and_call_original
          end

          context 'with a valid container expiration policy' do
            it 'schedules the next run' do
              expect { subject }.to change { container_expiration_policy.reload.next_run_at }
            end

            it 'marks the container repository as scheduled for cleanup' do
              expect { subject }.to change { container_repository.reload.cleanup_scheduled? }.from(false).to(true)
              expect(ContainerRepository.cleanup_scheduled.count).to eq(1)
            end

            it 'calls the limited capacity worker' do
              expect(ContainerExpirationPolicies::CleanupContainerRepositoryWorker).to receive(:perform_with_capacity)

              subject
            end
          end

          context 'with a disabled container expiration policy' do
            before do
              container_expiration_policy.disable!
            end

            it 'does not run the policy' do
              expect(ContainerRepository).not_to receive(:for_project_id)

              expect { subject }.not_to change { ContainerRepository.cleanup_scheduled.count }
            end
          end

          context 'with an invalid container expiration policy' do
            let(:user) { container_expiration_policy.project.owner }

            before do
              container_expiration_policy.update_column(:name_regex, '*production')
            end

            it 'disables the policy and tracks an error' do
              expect(ContainerRepository).not_to receive(:for_project_id)
              expect(Gitlab::ErrorTracking).to receive(:log_exception).with(instance_of(described_class::InvalidPolicyError), container_expiration_policy_id: container_expiration_policy.id)

              expect { subject }.to change { container_expiration_policy.reload.enabled }.from(true).to(false)
              expect(ContainerRepository.cleanup_scheduled).to be_empty
            end
          end
        end

        it_behaves_like 'handling a taken exclusive lease'
      end

      context 'with loopless enabled' do
        before do
          stub_feature_flags(container_registry_expiration_policies_loopless: true)
          expect(worker).not_to receive(:with_runnable_policy)
        end

        it 'calls the limited capacity worker' do
          expect(ContainerExpirationPolicies::CleanupContainerRepositoryWorker).to receive(:perform_with_capacity)

          subject
        end

        it_behaves_like 'handling a taken exclusive lease'
      end
    end

    context 'with throttling disabled' do
      before do
        stub_feature_flags(container_registry_expiration_policies_throttling: false)
      end

      context 'with no container expiration policies' do
        it_behaves_like 'not executing any policy'
      end

      context 'with container expiration policies' do
        let_it_be(:container_expiration_policy, reload: true) { create(:container_expiration_policy, :runnable) }
        let_it_be(:container_repository) { create(:container_repository, project: container_expiration_policy.project) }
        let_it_be(:user) { container_expiration_policy.project.owner }

        context 'a valid policy' do
          it 'runs the policy' do
            expect(ContainerExpirationPolicyService)
              .to receive(:new).with(container_expiration_policy.project, user).and_call_original
            expect(CleanupContainerRepositoryWorker).to receive(:perform_async).once.and_call_original

            expect { subject }.not_to raise_error
          end
        end

        context 'a disabled policy' do
          before do
            container_expiration_policy.disable!
          end

          it_behaves_like 'not executing any policy'
        end

        context 'a policy that is not due for a run' do
          before do
            container_expiration_policy.update_column(:next_run_at, 2.minutes.from_now)
          end

          it_behaves_like 'not executing any policy'
        end

        context 'a policy linked to no container repository' do
          before do
            container_expiration_policy.container_repositories.delete_all
          end

          it_behaves_like 'not executing any policy'
        end

        context 'an invalid policy' do
          before do
            container_expiration_policy.update_column(:name_regex, '*production')
          end

          it 'disables the policy and tracks an error' do
            expect(ContainerExpirationPolicyService).not_to receive(:new).with(container_expiration_policy, user)
            expect(Gitlab::ErrorTracking).to receive(:log_exception).with(instance_of(described_class::InvalidPolicyError), container_expiration_policy_id: container_expiration_policy.id)

            expect { subject }.to change { container_expiration_policy.reload.enabled }.from(true).to(false)
          end
        end
      end
    end

    context 'process stale ongoing cleanups' do
      let_it_be(:stuck_cleanup) { create(:container_repository, :cleanup_ongoing, expiration_policy_started_at: 1.day.ago) }
      let_it_be(:container_repository) { create(:container_repository, :cleanup_scheduled) }
      let_it_be(:container_repository) { create(:container_repository, :cleanup_unfinished) }

      it 'set them as unfinished' do
        expect { subject }
          .to change { ContainerRepository.cleanup_ongoing.count }.from(1).to(0)
          .and change { ContainerRepository.cleanup_unfinished.count }.from(1).to(2)
        expect(stuck_cleanup.reload).to be_cleanup_unfinished
      end
    end
  end
end
