#  frozen_string_literal: true

require 'spec_helper'

RSpec.describe BulkImportWorker, feature_category: :importers do
  describe '#perform' do
    context 'when no bulk import is found' do
      it 'does nothing' do
        expect(described_class).not_to receive(:perform_in)

        subject.perform(non_existing_record_id)
      end
    end

    context 'when bulk import is finished' do
      it 'does nothing' do
        bulk_import = create(:bulk_import, :finished)

        expect(described_class).not_to receive(:perform_in)

        subject.perform(bulk_import.id)
      end
    end

    context 'when bulk import is failed' do
      it 'does nothing' do
        bulk_import = create(:bulk_import, :failed)

        expect(described_class).not_to receive(:perform_in)

        subject.perform(bulk_import.id)
      end
    end

    context 'when all entities are processed' do
      it 'marks bulk import as finished' do
        bulk_import = create(:bulk_import, :started)
        create(:bulk_import_entity, :finished, bulk_import: bulk_import)
        create(:bulk_import_entity, :failed, bulk_import: bulk_import)

        subject.perform(bulk_import.id)

        expect(bulk_import.reload.finished?).to eq(true)
      end
    end

    context 'when all entities are failed' do
      it 'marks bulk import as failed' do
        bulk_import = create(:bulk_import, :started)
        create(:bulk_import_entity, :failed, bulk_import: bulk_import)
        create(:bulk_import_entity, :failed, bulk_import: bulk_import)

        subject.perform(bulk_import.id)

        expect(bulk_import.reload.failed?).to eq(true)
      end
    end

    context 'when maximum allowed number of import entities in progress' do
      it 'reenqueues itself' do
        bulk_import = create(:bulk_import, :started)
        create(:bulk_import_entity, :created, bulk_import: bulk_import)
        (described_class::DEFAULT_BATCH_SIZE + 1).times { |_| create(:bulk_import_entity, :started, bulk_import: bulk_import) }

        expect(described_class).to receive(:perform_in).with(described_class::PERFORM_DELAY, bulk_import.id)
        expect(BulkImports::ExportRequestWorker).not_to receive(:perform_async)

        subject.perform(bulk_import.id)
      end
    end

    context 'when bulk import is created' do
      it 'marks bulk import as started' do
        bulk_import = create(:bulk_import, :created)
        create(:bulk_import_entity, :created, bulk_import: bulk_import)

        subject.perform(bulk_import.id)

        expect(bulk_import.reload.started?).to eq(true)
      end

      it 'creates all the required pipeline trackers' do
        bulk_import = create(:bulk_import, :created)
        entity_1 = create(:bulk_import_entity, :created, bulk_import: bulk_import)
        entity_2 = create(:bulk_import_entity, :created, bulk_import: bulk_import)

        expect { subject.perform(bulk_import.id) }
          .to change { BulkImports::Tracker.count }
          .by(BulkImports::Groups::Stage.new(entity_1).pipelines.size * 2)

        expect(entity_1.trackers).not_to be_empty
        expect(entity_2.trackers).not_to be_empty
      end

      context 'when there are created entities to process' do
        let_it_be(:bulk_import) { create(:bulk_import, :created) }

        before do
          stub_const("#{described_class}::DEFAULT_BATCH_SIZE", 1)
        end

        it 'marks a batch of entities as started, enqueues EntityWorker, ExportRequestWorker and reenqueues' do
          create(:bulk_import_entity, :created, bulk_import: bulk_import)
          create(:bulk_import_entity, :created, bulk_import: bulk_import)

          expect(described_class).to receive(:perform_in).with(described_class::PERFORM_DELAY, bulk_import.id)
          expect(BulkImports::ExportRequestWorker).to receive(:perform_async).once

          subject.perform(bulk_import.id)

          expect(bulk_import.entities.map(&:status_name)).to contain_exactly(:created, :started)
        end

        context 'when there are project entities to process' do
          it 'enqueues ExportRequestWorker' do
            create(:bulk_import_entity, :created, :project_entity, bulk_import: bulk_import)

            expect(BulkImports::ExportRequestWorker).to receive(:perform_async).once

            subject.perform(bulk_import.id)
          end
        end
      end

      context 'when exception occurs' do
        it 'tracks the exception & marks import as failed' do
          bulk_import = create(:bulk_import, :created)
          create(:bulk_import_entity, :created, bulk_import: bulk_import)

          allow(BulkImports::ExportRequestWorker).to receive(:perform_async).and_raise(StandardError)

          expect(Gitlab::ErrorTracking).to receive(:track_exception).with(kind_of(StandardError), bulk_import_id: bulk_import.id)

          subject.perform(bulk_import.id)

          expect(bulk_import.reload.failed?).to eq(true)
        end
      end
    end

    context 'when importing a group' do
      it 'creates trackers for group entity' do
        bulk_import = create(:bulk_import)
        entity = create(:bulk_import_entity, :group_entity, bulk_import: bulk_import)

        subject.perform(bulk_import.id)

        expect(entity.trackers.to_a).to include(
          have_attributes(
            stage: 0, status_name: :created, relation: BulkImports::Groups::Pipelines::GroupPipeline.to_s
          ),
          have_attributes(
            stage: 1, status_name: :created, relation: BulkImports::Groups::Pipelines::GroupAttributesPipeline.to_s
          )
        )
      end
    end

    context 'when importing a project' do
      it 'creates trackers for project entity' do
        bulk_import = create(:bulk_import)
        entity = create(:bulk_import_entity, :project_entity, bulk_import: bulk_import)

        subject.perform(bulk_import.id)

        expect(entity.trackers.to_a).to include(
          have_attributes(
            stage: 0, status_name: :created, relation: BulkImports::Projects::Pipelines::ProjectPipeline.to_s
          ),
          have_attributes(
            stage: 1, status_name: :created, relation: BulkImports::Projects::Pipelines::RepositoryPipeline.to_s
          )
        )
      end
    end

    context 'when tracker configuration has a minimum version defined' do
      before do
        allow_next_instance_of(BulkImports::Groups::Stage) do |stage|
          allow(stage).to receive(:config).and_return(
            {
              pipeline1: { pipeline: 'PipelineClass1', stage: 0 },
              pipeline2: { pipeline: 'PipelineClass2', stage: 1, minimum_source_version: '14.10.0' },
              pipeline3: { pipeline: 'PipelineClass3', stage: 1, minimum_source_version: '15.0.0' },
              pipeline5: { pipeline: 'PipelineClass4', stage: 1, minimum_source_version: '15.1.0' },
              pipeline6: { pipeline: 'PipelineClass5', stage: 1, minimum_source_version: '16.0.0' }
            }
          )
        end
      end

      context 'when the source instance version is older than the tracker mininum version' do
        let_it_be(:bulk_import) { create(:bulk_import, source_version: '15.0.0') }
        let_it_be(:entity) { create(:bulk_import_entity, :group_entity, bulk_import: bulk_import) }

        it 'creates trackers as skipped if version requirement does not meet' do
          subject.perform(bulk_import.id)

          expect(entity.trackers.collect { |tracker| [tracker.status_name, tracker.relation] }).to contain_exactly(
            [:created, 'PipelineClass1'],
            [:created, 'PipelineClass2'],
            [:created, 'PipelineClass3'],
            [:skipped, 'PipelineClass4'],
            [:skipped, 'PipelineClass5']
          )
        end

        it 'logs an info message for the skipped pipelines' do
          expect_next_instance_of(Gitlab::Import::Logger) do |logger|
            expect(logger).to receive(:info).with({
              message: 'Pipeline skipped as source instance version not compatible with pipeline',
              bulk_import_entity_id: entity.id,
              bulk_import_id: entity.bulk_import_id,
              bulk_import_entity_type: entity.source_type,
              source_full_path: entity.source_full_path,
              importer: 'gitlab_migration',
              pipeline_name: 'PipelineClass4',
              minimum_source_version: '15.1.0',
              maximum_source_version: nil,
              source_version: '15.0.0'
            })

            expect(logger).to receive(:info).with({
              message: 'Pipeline skipped as source instance version not compatible with pipeline',
              bulk_import_entity_id: entity.id,
              bulk_import_id: entity.bulk_import_id,
              bulk_import_entity_type: entity.source_type,
              source_full_path: entity.source_full_path,
              importer: 'gitlab_migration',
              pipeline_name: 'PipelineClass5',
              minimum_source_version: '16.0.0',
              maximum_source_version: nil,
              source_version: '15.0.0'
            })
          end

          subject.perform(bulk_import.id)
        end
      end

      context 'when the source instance version is undefined' do
        it 'creates trackers as created' do
          bulk_import = create(:bulk_import, source_version: nil)
          entity = create(:bulk_import_entity, :group_entity, bulk_import: bulk_import)

          subject.perform(bulk_import.id)

          expect(entity.trackers.collect { |tracker| [tracker.status_name, tracker.relation] }).to contain_exactly(
            [:created, 'PipelineClass1'],
            [:created, 'PipelineClass2'],
            [:created, 'PipelineClass3'],
            [:created, 'PipelineClass4'],
            [:created, 'PipelineClass5']
          )
        end
      end
    end

    context 'when tracker configuration has a maximum version defined' do
      before do
        allow_next_instance_of(BulkImports::Groups::Stage) do |stage|
          allow(stage).to receive(:config).and_return(
            {
              pipeline1: { pipeline: 'PipelineClass1', stage: 0 },
              pipeline2: { pipeline: 'PipelineClass2', stage: 1, maximum_source_version: '14.10.0' },
              pipeline3: { pipeline: 'PipelineClass3', stage: 1, maximum_source_version: '15.0.0' },
              pipeline5: { pipeline: 'PipelineClass4', stage: 1, maximum_source_version: '15.1.0' },
              pipeline6: { pipeline: 'PipelineClass5', stage: 1, maximum_source_version: '16.0.0' }
            }
          )
        end
      end

      context 'when the source instance version is older than the tracker maximum version' do
        it 'creates trackers as skipped if version requirement does not meet' do
          bulk_import = create(:bulk_import, source_version: '15.0.0')
          entity = create(:bulk_import_entity, :group_entity, bulk_import: bulk_import)

          subject.perform(bulk_import.id)

          expect(entity.trackers.collect { |tracker| [tracker.status_name, tracker.relation] }).to contain_exactly(
            [:created, 'PipelineClass1'],
            [:skipped, 'PipelineClass2'],
            [:created, 'PipelineClass3'],
            [:created, 'PipelineClass4'],
            [:created, 'PipelineClass5']
          )
        end
      end

      context 'when the source instance version is a patch version' do
        it 'creates trackers with the same status as the non-patch source version' do
          bulk_import_1 = create(:bulk_import, source_version: '15.0.1')
          entity_1 = create(:bulk_import_entity, :group_entity, bulk_import: bulk_import_1)

          bulk_import_2 = create(:bulk_import, source_version: '15.0.0')
          entity_2 = create(:bulk_import_entity, :group_entity, bulk_import: bulk_import_2)

          described_class.perform_inline(bulk_import_1.id)
          described_class.perform_inline(bulk_import_2.id)

          trackers_1 = entity_1.trackers.collect { |tracker| [tracker.status_name, tracker.relation] }
          trackers_2 = entity_2.trackers.collect { |tracker| [tracker.status_name, tracker.relation] }

          expect(trackers_1).to eq(trackers_2)
        end
      end
    end
  end
end