require 'spec_helper'

describe Notes::BuildService do
  let(:note) { create(:discussion_note_on_issue) }
  let(:project) { note.project }
  let(:author) { note.author }
  let(:merge_request) { create(:merge_request, source_project: project) }
  let(:mr_note) { create(:discussion_note_on_merge_request, noteable: merge_request, project: project, author: author) }

  describe '#execute' do
    context 'when in_reply_to_discussion_id is specified' do
      context 'when a note with that original discussion ID exists' do
        it 'sets the note up to be in reply to that note' do
          new_note = described_class.new(project, author, note: 'Test', in_reply_to_discussion_id: note.discussion_id).execute
          expect(new_note).to be_valid
          expect(new_note.in_reply_to?(note)).to be_truthy
          expect(new_note.resolved?).to be_falsey
        end

        context 'when discussion is resolved' do
          before do
            mr_note.resolve!(author)
          end

          it 'resolves the note' do
            new_note = described_class.new(project, author, note: 'Test', in_reply_to_discussion_id: mr_note.discussion_id).execute
            expect(new_note).to be_valid
            expect(new_note.resolved?).to be_truthy
          end
        end
      end

      context 'when a note with that discussion ID exists' do
        it 'sets the note up to be in reply to that note' do
          new_note = described_class.new(project, author, note: 'Test', in_reply_to_discussion_id: note.discussion_id).execute
          expect(new_note).to be_valid
          expect(new_note.in_reply_to?(note)).to be_truthy
        end
      end

      context 'when no note with that discussion ID exists' do
        it 'sets an error' do
          new_note = described_class.new(project, author, note: 'Test', in_reply_to_discussion_id: 'foo').execute
          expect(new_note.errors[:base]).to include('Discussion to reply to cannot be found')
        end
      end

      context 'when user has no access to discussion' do
        it 'sets an error' do
          another_user = create(:user)
          new_note = described_class.new(project, another_user, note: 'Test', in_reply_to_discussion_id: note.discussion_id).execute

          expect(new_note.errors[:base]).to include('Discussion to reply to cannot be found')
        end
      end

      context 'personal snippet note' do
        def reply(note, user = nil)
          user ||= create(:user)

          described_class.new(nil,
                              user,
                              note: 'Test',
                              in_reply_to_discussion_id: note.discussion_id).execute
        end

        let(:snippet_author) { create(:user) }

        context 'when a snippet is public' do
          it 'creates a reply note' do
            snippet = create(:personal_snippet, :public)
            note = create(:discussion_note_on_personal_snippet, noteable: snippet)

            new_note = reply(note)

            expect(new_note).to be_valid
            expect(new_note.in_reply_to?(note)).to be_truthy
          end
        end

        context 'when a snippet is private' do
          let(:snippet) { create(:personal_snippet, :private, author: snippet_author) }
          let(:note) { create(:discussion_note_on_personal_snippet, noteable: snippet) }

          it 'creates a reply note when the author replies' do
            new_note = reply(note, snippet_author)

            expect(new_note).to be_valid
            expect(new_note.in_reply_to?(note)).to be_truthy
          end

          it 'sets an error when another user replies' do
            new_note = reply(note)

            expect(new_note.errors[:base]).to include('Discussion to reply to cannot be found')
          end
        end

        context 'when a snippet is internal' do
          let(:snippet) { create(:personal_snippet, :internal, author: snippet_author) }
          let(:note) { create(:discussion_note_on_personal_snippet, noteable: snippet) }

          it 'creates a reply note when the author replies' do
            new_note = reply(note, snippet_author)

            expect(new_note).to be_valid
            expect(new_note.in_reply_to?(note)).to be_truthy
          end

          it 'creates a reply note when a regular user replies' do
            new_note = reply(note)

            expect(new_note).to be_valid
            expect(new_note.in_reply_to?(note)).to be_truthy
          end

          it 'sets an error when an external user replies' do
            new_note = reply(note, create(:user, :external))

            expect(new_note.errors[:base]).to include('Discussion to reply to cannot be found')
          end
        end
      end
    end

    context 'when replying to individual note' do
      let(:note) { create(:note_on_issue) }

      subject { described_class.new(project, author, note: 'Test', in_reply_to_discussion_id: note.discussion_id).execute }

      shared_examples 'an individual note reply' do
        it 'builds another individual note' do
          expect(subject).to be_valid
          expect(subject).to be_a(Note)
          expect(subject.discussion_id).not_to eq(note.discussion_id)
        end
      end

      context 'when reply_to_individual_notes is disabled' do
        before do
          stub_feature_flags(reply_to_individual_notes: false)
        end

        it_behaves_like 'an individual note reply'
      end

      context 'when reply_to_individual_notes is enabled' do
        before do
          stub_feature_flags(reply_to_individual_notes: true)
        end

        it 'sets the note up to be in reply to that note' do
          expect(subject).to be_valid
          expect(subject).to be_a(DiscussionNote)
          expect(subject.discussion_id).to eq(note.discussion_id)
        end

        context 'when noteable does not support replies' do
          let(:note) { create(:note_on_commit) }

          it_behaves_like 'an individual note reply'
        end
      end
    end

    it 'builds a note without saving it' do
      new_note = described_class.new(project,
                                    author,
                                    noteable_type: note.noteable_type,
                                    noteable_id: note.noteable_id,
                                    note: 'Test').execute
      expect(new_note).to be_valid
      expect(new_note).not_to be_persisted
    end
  end
end