# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Issues::MoveService do
  let_it_be(:user) { create(:user) }
  let_it_be(:author) { create(:user) }
  let_it_be(:title) { 'Some issue' }
  let_it_be(:description) { "Some issue description with mention to #{user.to_reference}" }
  let_it_be(:group) { create(:group, :private) }
  let_it_be(:sub_group_1) { create(:group, :private, parent: group) }
  let_it_be(:sub_group_2) { create(:group, :private, parent: group) }
  let_it_be(:old_project) { create(:project, namespace: sub_group_1) }
  let_it_be(:new_project) { create(:project, namespace: sub_group_2) }

  let(:old_issue) do
    create(:issue, title: title, description: description, project: old_project, author: author)
  end

  subject(:move_service) do
    described_class.new(old_project, user)
  end

  shared_context 'user can move issue' do
    before do
      old_project.add_reporter(user)
      new_project.add_reporter(user)
    end
  end

  describe '#execute' do
    shared_context 'issue move executed' do
      let!(:new_issue) { move_service.execute(old_issue, new_project) }
    end

    context 'issue movable' do
      include_context 'user can move issue'

      context 'generic issue' do
        include_context 'issue move executed'

        it 'creates a new issue in a new project' do
          expect(new_issue.project).to eq new_project
        end

        it 'copies issue title' do
          expect(new_issue.title).to eq title
        end

        it 'copies issue description' do
          expect(new_issue.description).to eq description
        end

        it 'adds system note to old issue at the end' do
          expect(old_issue.notes.last.note).to start_with 'moved to'
        end

        it 'adds system note to new issue at the end' do
          expect(new_issue.notes.last.note).to start_with 'moved from'
        end

        it 'closes old issue' do
          expect(old_issue.closed?).to be true
        end

        it 'persists new issue' do
          expect(new_issue.persisted?).to be true
        end

        it 'persists all changes' do
          expect(old_issue.changed?).to be false
          expect(new_issue.changed?).to be false
        end

        it 'preserves author' do
          expect(new_issue.author).to eq author
        end

        it 'creates a new internal id for issue' do
          expect(new_issue.iid).to be 1
        end

        it 'marks issue as moved' do
          expect(old_issue.moved?).to eq true
          expect(old_issue.moved_to).to eq new_issue
        end

        it 'preserves create time' do
          expect(old_issue.created_at).to eq new_issue.created_at
        end
      end

      context 'issue with award emoji' do
        let!(:award_emoji) { create(:award_emoji, awardable: old_issue) }

        it 'copies the award emoji' do
          old_issue.reload
          new_issue = move_service.execute(old_issue, new_project)

          expect(old_issue.award_emoji.first.name).to eq new_issue.reload.award_emoji.first.name
        end
      end

      context 'issue with milestone' do
        let(:milestone) { create(:milestone, group: sub_group_1) }
        let(:new_project) { create(:project, namespace: sub_group_1) }

        let(:old_issue) do
          create(:issue, title: title, description: description, project: old_project, author: author, milestone: milestone)
        end

        before do
          create(:resource_milestone_event, issue: old_issue, milestone: milestone, action: :add)
        end

        it 'does not create extra milestone events' do
          new_issue = move_service.execute(old_issue, new_project)

          expect(new_issue.resource_milestone_events.count).to eq(old_issue.resource_milestone_events.count)
        end
      end

      context 'issue with due date' do
        let(:old_issue) do
          create(:issue, title: title, description: description, project: old_project, author: author, due_date: '2020-01-10')
        end

        before do
          SystemNoteService.change_due_date(old_issue, old_project, author, old_issue.due_date)
        end

        it 'does not create extra system notes' do
          new_issue = move_service.execute(old_issue, new_project)

          expect(new_issue.notes.count).to eq(old_issue.notes.count)
        end
      end

      context 'issue with assignee' do
        let_it_be(:assignee) { create(:user) }

        before do
          old_issue.assignees = [assignee]
        end

        it 'preserves assignee with access to the new issue' do
          new_project.add_reporter(assignee)

          new_issue = move_service.execute(old_issue, new_project)

          expect(new_issue.assignees).to eq([assignee])
        end

        it 'ignores assignee without access to the new issue' do
          new_issue = move_service.execute(old_issue, new_project)

          expect(new_issue.assignees).to be_empty
        end
      end

      context 'moving to same project' do
        let(:new_project) { old_project }

        it 'raises error' do
          expect { move_service.execute(old_issue, new_project) }
            .to raise_error(StandardError, /Cannot move issue/)
        end
      end

      context 'project issue hooks' do
        let!(:hook) { create(:project_hook, project: old_project, issues_events: true) }

        it 'executes project issue hooks' do
          allow_next_instance_of(WebHookService) do |instance|
            allow(instance).to receive(:execute)
          end

          # Ideally, we'd test that `WebHookWorker.jobs.size` increased by 1,
          # but since the entire spec run takes place in a transaction, we never
          # actually get to the `after_commit` hook that queues these jobs.
          expect { move_service.execute(old_issue, new_project) }
            .not_to raise_error # Sidekiq::Worker::EnqueueFromTransactionError
        end
      end

      # These tests verify that notes are copied. More thorough tests are in
      # the unit test for Notes::CopyService.
      context 'issue with notes' do
        let!(:notes) do
          [
            create(:note, noteable: old_issue, project: old_project, created_at: 2.weeks.ago, updated_at: 1.week.ago),
            create(:note, noteable: old_issue, project: old_project)
          ]
        end

        let(:copied_notes) { new_issue.notes.limit(notes.size) } # Remove the system note added by the copy itself

        include_context 'issue move executed'

        it 'copies existing notes in order' do
          expect(copied_notes.order('id ASC').pluck(:note)).to eq(notes.map(&:note))
        end
      end
    end

    describe 'move permissions' do
      let(:move) { move_service.execute(old_issue, new_project) }

      context 'user is reporter in both projects' do
        include_context 'user can move issue'
        it { expect { move }.not_to raise_error }
      end

      context 'user is reporter only in new project' do
        before do
          new_project.add_reporter(user)
        end

        it { expect { move }.to raise_error(StandardError, /permissions/) }
      end

      context 'user is reporter only in old project' do
        before do
          old_project.add_reporter(user)
        end

        it { expect { move }.to raise_error(StandardError, /permissions/) }
      end

      context 'user is reporter in one project and guest in another' do
        before do
          new_project.add_guest(user)
          old_project.add_reporter(user)
        end

        it { expect { move }.to raise_error(StandardError, /permissions/) }
      end

      context 'issue has already been moved' do
        include_context 'user can move issue'

        let(:moved_to_issue) { create(:issue) }

        let(:old_issue) do
          create(:issue, project: old_project, author: author,
                         moved_to: moved_to_issue)
        end

        it { expect { move }.to raise_error(StandardError, /permissions/) }
      end

      context 'issue is not persisted' do
        include_context 'user can move issue'
        let(:old_issue) { build(:issue, project: old_project, author: author) }

        it { expect { move }.to raise_error(StandardError, /permissions/) }
      end
    end
  end

  describe '#rewrite_related_issues' do
    include_context 'user can move issue'

    let(:admin) { create(:admin) }
    let(:authorized_project) { create(:project) }
    let(:authorized_project2) { create(:project) }
    let(:unauthorized_project) { create(:project) }

    let(:authorized_issue_b) { create(:issue, project: authorized_project) }
    let(:authorized_issue_c) { create(:issue, project: authorized_project2) }
    let(:authorized_issue_d) { create(:issue, project: authorized_project2) }
    let(:unauthorized_issue) { create(:issue, project: unauthorized_project) }

    let!(:issue_link_a) { create(:issue_link, source: old_issue, target: authorized_issue_b) }
    let!(:issue_link_b) { create(:issue_link, source: old_issue, target: unauthorized_issue) }
    let!(:issue_link_c) { create(:issue_link, source: old_issue, target: authorized_issue_c) }
    let!(:issue_link_d) { create(:issue_link, source: authorized_issue_d, target: old_issue) }

    before do
      authorized_project.add_developer(user)
      authorized_project2.add_developer(user)
    end

    context 'multiple related issues' do
      it 'moves all related issues and retains permissions' do
        new_issue = move_service.execute(old_issue, new_project)

        expect(new_issue.related_issues(admin))
          .to match_array([authorized_issue_b, authorized_issue_c, authorized_issue_d, unauthorized_issue])

        expect(new_issue.related_issues(user))
          .to match_array([authorized_issue_b, authorized_issue_c, authorized_issue_d])

        expect(authorized_issue_d.related_issues(user))
          .to match_array([new_issue])
      end
    end
  end

  context 'updating sent notifications' do
    let!(:old_issue_notification_1) { create(:sent_notification, project: old_issue.project, noteable: old_issue) }
    let!(:old_issue_notification_2) { create(:sent_notification, project: old_issue.project, noteable: old_issue) }
    let!(:other_issue_notification) { create(:sent_notification, project: old_issue.project) }

    include_context 'user can move issue'

    context 'when issue is from service desk' do
      before do
        allow(old_issue).to receive(:from_service_desk?).and_return(true)
      end

      it 'updates moved issue sent notifications' do
        new_issue = move_service.execute(old_issue, new_project)

        old_issue_notification_1.reload
        old_issue_notification_2.reload
        expect(old_issue_notification_1.project_id).to eq(new_issue.project_id)
        expect(old_issue_notification_1.noteable_id).to eq(new_issue.id)
        expect(old_issue_notification_2.project_id).to eq(new_issue.project_id)
        expect(old_issue_notification_2.noteable_id).to eq(new_issue.id)
      end

      it 'does not update other issues sent notifications' do
        expect do
          move_service.execute(old_issue, new_project)
          other_issue_notification.reload
        end.not_to change { other_issue_notification.noteable_id }
      end
    end

    context 'when issue is not from service desk' do
      it 'does not update sent notifications' do
        move_service.execute(old_issue, new_project)

        old_issue_notification_1.reload
        old_issue_notification_2.reload
        expect(old_issue_notification_1.project_id).to eq(old_issue.project_id)
        expect(old_issue_notification_1.noteable_id).to eq(old_issue.id)
        expect(old_issue_notification_2.project_id).to eq(old_issue.project_id)
        expect(old_issue_notification_2.noteable_id).to eq(old_issue.id)
      end
    end
  end
end