# frozen_string_literal: true

require 'spec_helper'

RSpec.describe 'Merge request > User sees pipelines', :js, feature_category: :code_review_workflow do
  describe 'pipeline tab' do
    let(:merge_request) { create(:merge_request) }
    let(:project) { merge_request.target_project }
    let(:user) { project.creator }

    before do
      project.add_maintainer(user)
      sign_in(user)
    end

    context 'with pipelines' do
      let!(:pipeline) do
        create(:ci_empty_pipeline,
               project: merge_request.source_project,
               ref: merge_request.source_branch,
               sha: merge_request.diff_head_sha)
      end

      before do
        merge_request.update_attribute(:head_pipeline_id, pipeline.id)
      end

      it 'user visits merge request pipelines tab' do
        visit project_merge_request_path(project, merge_request)

        expect(page.find('.ci-widget')).to have_content('pending')

        page.within('.merge-request-tabs') do
          click_link('Pipelines')
        end
        wait_for_requests

        expect(page).to have_css('[data-testid="pipeline-mini-graph"]')
      end

      context 'with a detached merge request pipeline' do
        let(:merge_request) { create(:merge_request, :with_detached_merge_request_pipeline) }

        it 'displays the "Run pipeline" button' do
          visit project_merge_request_path(project, merge_request)

          page.within('.merge-request-tabs') do
            click_link('Pipelines')
          end

          wait_for_requests

          expect(page.find('[data-testid="run_pipeline_button"]')).to have_text('Run pipeline')
        end
      end

      context 'with a merged results pipeline' do
        let(:merge_request) { create(:merge_request, :with_merge_request_pipeline) }

        it 'displays the "Run pipeline" button' do
          visit project_merge_request_path(project, merge_request)

          page.within('.merge-request-tabs') do
            click_link('Pipelines')
          end

          wait_for_requests

          expect(page.find('[data-testid="run_pipeline_button"]')).to have_text('Run pipeline')
        end
      end
    end

    context 'without pipelines' do
      before do
        visit project_merge_request_path(project, merge_request)
      end

      it 'user visits merge request page' do
        page.within('.merge-request-tabs') do
          expect(page).to have_link('Pipelines')
        end
      end

      it 'shows empty state with run pipeline button' do
        page.within('.merge-request-tabs') do
          click_link('Pipelines')
        end

        expect(page).to have_content('There are currently no pipelines.')
        expect(page.find('[data-testid="run_pipeline_button"]')).to have_text('Run pipeline')
      end
    end
  end

  describe 'fork MRs in parent project', :sidekiq_inline do
    include ProjectForksHelper

    let_it_be(:parent_project) { create(:project, :public, :repository) }
    let_it_be(:forked_project) { fork_project(parent_project, developer_in_fork, repository: true, target_project: create(:project, :public, :repository)) }
    let_it_be(:developer_in_parent) { create(:user) }
    let_it_be(:developer_in_fork) { create(:user) }
    let_it_be(:reporter_in_parent_and_developer_in_fork) { create(:user) }

    let(:merge_request) do
      create(:merge_request, :with_detached_merge_request_pipeline,
                             source_project: forked_project, source_branch: 'feature',
                             target_project: parent_project, target_branch: 'master')
    end

    let(:config) do
      { test: { script: 'test', rules: [{ if: '$CI_MERGE_REQUEST_ID' }] } }
    end

    before_all do
      parent_project.add_developer(developer_in_parent)
      parent_project.add_reporter(reporter_in_parent_and_developer_in_fork)
      forked_project.add_developer(developer_in_fork)
      forked_project.add_developer(reporter_in_parent_and_developer_in_fork)
    end

    before do
      stub_ci_pipeline_yaml_file(YAML.dump(config))
      sign_in(actor)
    end

    after do
      parent_project.all_pipelines.delete_all
      forked_project.all_pipelines.delete_all
    end

    context 'when actor is a developer in parent project' do
      let(:actor) { developer_in_parent }

      it 'creates a pipeline in the parent project when user proceeds with the warning' do
        visit project_merge_request_path(parent_project, merge_request)

        create_merge_request_pipeline
        act_on_security_warning(action: 'Run pipeline')

        check_pipeline(expected_project: parent_project)
        check_head_pipeline(expected_project: parent_project)
      end

      it 'does not create a pipeline in the parent project when user cancels the action', :clean_gitlab_redis_cache, :clean_gitlab_redis_shared_state do
        visit project_merge_request_path(parent_project, merge_request)

        create_merge_request_pipeline
        act_on_security_warning(action: 'Cancel')

        check_no_pipelines
      end
    end

    context 'when actor is a developer in fork project' do
      let(:actor) { developer_in_fork }

      it 'creates a pipeline in the fork project' do
        visit project_merge_request_path(parent_project, merge_request)

        create_merge_request_pipeline

        check_pipeline(expected_project: forked_project)
        check_head_pipeline(expected_project: forked_project)
      end
    end

    context 'when actor is a reporter in parent project and a developer in fork project' do
      let(:actor) { reporter_in_parent_and_developer_in_fork }

      it 'creates a pipeline in the fork project' do
        visit project_merge_request_path(parent_project, merge_request)

        create_merge_request_pipeline

        check_pipeline(expected_project: forked_project)
        check_head_pipeline(expected_project: forked_project)
      end
    end

    def create_merge_request_pipeline
      page.within('.merge-request-tabs') { click_link('Pipelines') }
      click_button('Run pipeline')
    end

    def check_pipeline(expected_project:)
      page.within('.ci-table') do
        expect(page).to have_selector('.commit', count: 2)

        page.within(first('.commit')) do
          page.within('.pipeline-tags') do
            expect(page.find('[data-testid="pipeline-url-link"]')[:href]).to include(expected_project.full_path)
            expect(page).to have_content('merge request')
          end
          page.within('.pipeline-triggerer') do
            expect(page).to have_link(href: user_path(actor))
          end
        end
      end
    end

    def check_head_pipeline(expected_project:)
      page.within('.merge-request-tabs') { click_link('Overview') }

      page.within('.ci-widget-content') do
        expect(page.find('.pipeline-id')[:href]).to include(expected_project.full_path)
      end
    end

    def act_on_security_warning(action:)
      page.within('#create-pipeline-for-fork-merge-request-modal') do
        expect(page).to have_content('Are you sure you want to run this pipeline?')
        click_button(action)
      end
    end

    def check_no_pipelines
      page.within('.ci-table') do
        expect(page).to have_selector('.commit', count: 1)
      end
    end
  end

  describe 'race condition' do
    let(:project) { create(:project, :repository) }
    let(:user) { create(:user) }
    let(:build_push_data) { { ref: 'feature', checkout_sha: TestEnv::BRANCH_SHA['feature'] } }

    let(:merge_request_params) do
      { "source_branch" => "feature", "source_project_id" => project.id,
        "target_branch" => "master", "target_project_id" => project.id, "title" => "A" }
    end

    before do
      project.add_maintainer(user)
      sign_in user
    end

    context 'when pipeline and merge request were created simultaneously', :delete do
      before do
        stub_ci_pipeline_to_return_yaml_file

        threads = []

        threads << Thread.new do
          Sidekiq::Worker.skipping_transaction_check do
            @merge_request = MergeRequests::CreateService.new(project: project, current_user: user, params: merge_request_params).execute
          end
        end

        threads << Thread.new do
          Sidekiq::Worker.skipping_transaction_check do
            @pipeline = Ci::CreatePipelineService.new(project, user, build_push_data).execute(:push).payload
          end
        end

        threads.each { |thr| thr.join }
      end

      it 'user sees pipeline in merge request widget', :sidekiq_might_not_need_inline do
        visit project_merge_request_path(project, @merge_request)

        expect(page.find(".ci-widget")).to have_content(TestEnv::BRANCH_SHA['feature'])
        expect(page.find(".ci-widget")).to have_content("##{@pipeline.id}")
      end
    end
  end
end