# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Issues::ExportCsvService, :with_license, feature_category: :team_planning do
  let_it_be(:user) { create(:user) }
  let_it_be(:group) { create(:group) }
  let_it_be(:project) { create(:project, :public, group: group) }
  let_it_be(:issue) { create(:issue, project: project, author: user) }
  let_it_be(:bad_issue) { create(:issue, project: project, author: user) }

  subject { described_class.new(Issue.all, project) }

  it 'renders csv to string' do
    expect(subject.csv_data).to be_a String
  end

  describe '#email' do
    it 'emails csv' do
      expect { subject.email(user) }.to change(ActionMailer::Base.deliveries, :count)
    end

    it 'renders with a target filesize' do
      expect_next_instance_of(CsvBuilder) do |csv_builder|
        expect(csv_builder).to receive(:render).with(described_class::TARGET_FILESIZE).once
      end

      subject.email(user)
    end
  end

  def csv
    CSV.parse(subject.csv_data, headers: true)
  end

  context 'includes' do
    let_it_be(:milestone) { create(:milestone, title: 'v1.0', project: project) }
    let_it_be(:idea_label) { create(:label, project: project, title: 'Idea') }
    let_it_be(:feature_label) { create(:label, project: project, title: 'Feature') }

    before_all do
      # Creating a timelog touches the updated_at timestamp of issue,
      # so create these first.
      issue.timelogs.create!(time_spent: 360, user: user)
      issue.timelogs.create!(time_spent: 200, user: user)
      issue.update!(
        milestone: milestone,
        assignees: [user],
        description: 'Issue with details',
        state: :opened,
        due_date: DateTime.new(2014, 3, 2),
        created_at: DateTime.new(2015, 4, 3, 2, 1, 0),
        updated_at: DateTime.new(2016, 5, 4, 3, 2, 1),
        closed_at: DateTime.new(2017, 6, 5, 4, 3, 2),
        weight: 4,
        discussion_locked: true,
        labels: [feature_label, idea_label],
        time_estimate: 72000
      )
    end

    shared_examples 'exports CSVs for issues' do
      it 'includes the columns required for import' do
        expect(csv.headers).to include('Title', 'Description')
      end

      it 'returns two issues' do
        expect(csv.count).to eq(2)
      end

      specify 'iid' do
        expect(csv[0]['Issue ID']).to eq issue.iid.to_s
      end

      specify 'url' do
        expect(csv[0]['URL']).to match(/http.*#{project.full_path}.*#{issue.iid}/)
      end

      specify 'title' do
        expect(csv[0]['Title']).to eq issue.title
      end

      specify 'state' do
        expect(csv[0]['State']).to eq 'Open'
      end

      specify 'description' do
        expect(csv[0]['Description']).to eq issue.description
        expect(csv[1]['Description']).to eq nil
      end

      specify 'author name' do
        expect(csv[0]['Author']).to eq issue.author_name
      end

      specify 'author username' do
        expect(csv[0]['Author Username']).to eq issue.author.username
      end

      specify 'assignee name' do
        expect(csv[0]['Assignee']).to eq user.name
        expect(csv[1]['Assignee']).to eq ''
      end

      specify 'assignee username' do
        expect(csv[0]['Assignee Username']).to eq user.username
        expect(csv[1]['Assignee Username']).to eq ''
      end

      specify 'confidential' do
        expect(csv[0]['Confidential']).to eq 'No'
      end

      specify 'milestone' do
        expect(csv[0]['Milestone']).to eq issue.milestone.title
        expect(csv[1]['Milestone']).to eq nil
      end

      specify 'labels' do
        expect(csv[0]['Labels']).to eq 'Feature,Idea'
        expect(csv[1]['Labels']).to eq nil
      end

      specify 'due_date' do
        expect(csv[0]['Due Date']).to eq '2014-03-02'
        expect(csv[1]['Due Date']).to eq nil
      end

      specify 'created_at' do
        expect(csv[0]['Created At (UTC)']).to eq '2015-04-03 02:01:00'
      end

      specify 'updated_at' do
        expect(csv[0]['Updated At (UTC)']).to eq '2016-05-04 03:02:01'
      end

      specify 'closed_at' do
        expect(csv[0]['Closed At (UTC)']).to eq '2017-06-05 04:03:02'
        expect(csv[1]['Closed At (UTC)']).to eq nil
      end

      specify 'discussion_locked' do
        expect(csv[0]['Locked']).to eq 'Yes'
      end

      specify 'weight' do
        expect(csv[0]['Weight']).to eq '4'
      end

      specify 'time estimate' do
        expect(csv[0]['Time Estimate']).to eq '72000'
        expect(csv[1]['Time Estimate']).to eq '0'
      end

      specify 'time spent' do
        expect(csv[0]['Time Spent']).to eq '560'
        expect(csv[1]['Time Spent']).to eq '0'
      end

      context 'with issues filtered by labels and project' do
        subject do
          described_class.new(
            IssuesFinder.new(user, project_id: project.id, label_name: %w[Idea Feature]).execute,
            project
          )
        end

        it 'returns only filtered objects' do
          expect(csv.count).to eq(1)
          expect(csv[0]['Issue ID']).to eq issue.iid.to_s
        end
      end

      context 'with label links' do
        let(:labeled_issues) { create_list(:labeled_issue, 2, project: project, author: user, labels: [feature_label, idea_label]) }

        it 'does not run a query for each label link' do
          control = ActiveRecord::QueryRecorder.new { csv }

          labeled_issues

          expect { csv }.not_to exceed_query_limit(control)
          expect(csv.count).to eq(4)
        end

        it 'returns the labels in sorted order' do
          labeled_issues

          labeled_rows = csv.select { |entry| labeled_issues.map(&:iid).include?(entry['Issue ID'].to_i) }
          expect(labeled_rows.count).to eq(2)
          expect(labeled_rows.map { |entry| entry['Labels'] }).to all(eq("Feature,Idea"))
        end
      end
    end

    context 'with export_csv_preload_in_batches feature flag disabled' do
      before do
        stub_feature_flags(export_csv_preload_in_batches: false)
      end

      it_behaves_like 'exports CSVs for issues'
    end

    context 'with export_csv_preload_in_batches feature flag enabled' do
      it_behaves_like 'exports CSVs for issues'
    end
  end

  context 'with minimal details' do
    it 'renders labels as nil' do
      expect(csv[0]['Labels']).to eq nil
    end
  end
end
