# frozen_string_literal: true

require 'spec_helper'

describe Event do
  describe "Associations" do
    it { is_expected.to belong_to(:project) }
    it { is_expected.to belong_to(:target) }
  end

  describe "Respond to" do
    it { is_expected.to respond_to(:author_name) }
    it { is_expected.to respond_to(:author_email) }
    it { is_expected.to respond_to(:issue_title) }
    it { is_expected.to respond_to(:merge_request_title) }
  end

  describe 'Callbacks' do
    let(:project) { create(:project) }

    describe 'after_create :reset_project_activity' do
      it 'calls the reset_project_activity method' do
        expect_next_instance_of(described_class) do |instance|
          expect(instance).to receive(:reset_project_activity)
        end

        create_push_event(project, project.owner)
      end
    end

    describe 'after_create :set_last_repository_updated_at' do
      context 'with a push event' do
        it 'updates the project last_repository_updated_at' do
          project.update(last_repository_updated_at: 1.year.ago)

          create_push_event(project, project.owner)

          project.reload

          expect(project.last_repository_updated_at).to be_within(1.minute).of(Time.now)
        end
      end

      context 'without a push event' do
        it 'does not update the project last_repository_updated_at' do
          project.update(last_repository_updated_at: 1.year.ago)

          create(:closed_issue_event, project: project, author: project.owner)

          project.reload

          expect(project.last_repository_updated_at).to be_within(1.minute).of(1.year.ago)
        end
      end
    end

    describe '#set_last_repository_updated_at' do
      it 'only updates once every Event::REPOSITORY_UPDATED_AT_INTERVAL minutes' do
        last_known_timestamp = (Event::REPOSITORY_UPDATED_AT_INTERVAL - 1.minute).ago
        project.update(last_repository_updated_at: last_known_timestamp)
        project.reload # a reload removes fractions of seconds

        expect do
          create_push_event(project, project.owner)
          project.reload
        end.not_to change { project.last_repository_updated_at }
      end
    end

    describe 'after_create :track_user_interacted_projects' do
      let(:event) { build(:push_event, project: project, author: project.owner) }

      it 'passes event to UserInteractedProject.track' do
        expect(UserInteractedProject).to receive(:available?).and_return(true)
        expect(UserInteractedProject).to receive(:track).with(event)
        event.save
      end

      it 'does not call UserInteractedProject.track if its not yet available' do
        expect(UserInteractedProject).to receive(:available?).and_return(false)
        expect(UserInteractedProject).not_to receive(:track)
        event.save
      end
    end
  end

  describe "Push event" do
    let(:project) { create(:project, :private) }
    let(:user) { project.owner }
    let(:event) { create_push_event(project, user) }

    it do
      expect(event.push_action?).to be_truthy
      expect(event.visible_to_user?(user)).to be_truthy
      expect(event.visible_to_user?(nil)).to be_falsey
      expect(event.tag?).to be_falsey
      expect(event.branch_name).to eq("master")
      expect(event.author).to eq(user)
    end
  end

  describe '#target_title' do
    let_it_be(:project) { create(:project) }

    let(:author) { project.owner }
    let(:target) { nil }

    let(:event) do
      described_class.new(project: project,
                          target: target,
                          author_id: author.id)
    end

    context 'for an issue' do
      let(:title) { generate(:title) }
      let(:issue) { create(:issue, title: title, project: project) }
      let(:target) { issue }

      it 'delegates to issue title' do
        expect(event.target_title).to eq(title)
      end
    end

    context 'for a wiki page' do
      let(:title) { generate(:wiki_page_title) }
      let(:wiki_page) { create(:wiki_page, title: title, project: project) }
      let(:event) { create(:wiki_page_event, project: project, wiki_page: wiki_page) }

      it 'delegates to wiki page title' do
        expect(event.target_title).to eq(wiki_page.title)
      end
    end
  end

  describe '#membership_changed?' do
    context "created" do
      subject { build(:event, :created).membership_changed? }

      it { is_expected.to be_falsey }
    end

    context "updated" do
      subject { build(:event, :updated).membership_changed? }

      it { is_expected.to be_falsey }
    end

    context "expired" do
      subject { build(:event, :expired).membership_changed? }

      it { is_expected.to be_truthy }
    end

    context "left" do
      subject { build(:event, :left).membership_changed? }

      it { is_expected.to be_truthy }
    end

    context "joined" do
      subject { build(:event, :joined).membership_changed? }

      it { is_expected.to be_truthy }
    end
  end

  describe '#note?' do
    subject { described_class.new(project: target.project, target: target) }

    context 'issue note event' do
      let(:target) { create(:note_on_issue) }

      it { is_expected.to be_note }
    end

    context 'merge request diff note event' do
      let(:target) { create(:legacy_diff_note_on_merge_request) }

      it { is_expected.to be_note }
    end
  end

  describe '#visible_to_user?' do
    let_it_be(:non_member) { create(:user) }
    let_it_be(:member) { create(:user) }
    let_it_be(:guest) { create(:user) }
    let_it_be(:author) { create(:author) }
    let_it_be(:assignee) { create(:user) }
    let_it_be(:admin) { create(:admin) }
    let_it_be(:public_project) { create(:project, :public) }
    let_it_be(:private_project) { create(:project, :private) }

    let(:project) { public_project }
    let(:issue) { create(:issue, project: project, author: author, assignees: [assignee]) }
    let(:confidential_issue) { create(:issue, :confidential, project: project, author: author, assignees: [assignee]) }
    let(:project_snippet) { create(:project_snippet, :public, project: project, author: author) }
    let(:personal_snippet) { create(:personal_snippet, :public, author: author) }
    let(:note_on_commit) { create(:note_on_commit, project: project) }
    let(:note_on_issue) { create(:note_on_issue, noteable: issue, project: project) }
    let(:note_on_confidential_issue) { create(:note_on_issue, noteable: confidential_issue, project: project) }
    let(:note_on_project_snippet) { create(:note_on_project_snippet, author: author, noteable: project_snippet, project: project) }
    let(:note_on_personal_snippet) { create(:note_on_personal_snippet, author: author, noteable: personal_snippet, project: nil) }
    let(:milestone_on_project) { create(:milestone, project: project) }
    let(:event) do
      described_class.new(project: project,
                          target: target,
                          author_id: author.id)
    end

    before do
      project.add_developer(member)
      project.add_guest(guest)
    end

    def visible_to_all
      {
        logged_out: true,
        non_member: true,
        guest: true,
        member: true,
        admin: true
      }
    end

    def visible_to_none
      visible_to_all.transform_values { |_| false }
    end

    def visible_to_none_except(*roles)
      visible_to_none.merge(roles.map { |role| [role, true] }.to_h)
    end

    def visible_to_all_except(*roles)
      visible_to_all.merge(roles.map { |role| [role, false] }.to_h)
    end

    shared_examples 'visibility examples' do
      it 'has the correct visibility' do
        expect({
          logged_out: event.visible_to_user?(nil),
          non_member: event.visible_to_user?(non_member),
          guest: event.visible_to_user?(guest),
          member: event.visible_to_user?(member),
          admin: event.visible_to_user?(admin)
        }).to match(visibility)
      end
    end

    shared_examples 'visible to assignee' do |visible|
      it { expect(event.visible_to_user?(assignee)).to eq(visible) }
    end

    shared_examples 'visible to author' do |visible|
      it { expect(event.visible_to_user?(author)).to eq(visible) }
    end

    shared_examples 'visible to assignee and author' do |visible|
      include_examples 'visible to assignee', visible
      include_examples 'visible to author', visible
    end

    context 'commit note event' do
      let(:project) { create(:project, :public, :repository) }
      let(:target) { note_on_commit }

      include_examples 'visibility examples' do
        let(:visibility) { visible_to_all }
      end

      context 'private project' do
        let(:project) { create(:project, :private, :repository) }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_none_except(:member, :admin) }
        end
      end
    end

    context 'issue event' do
      context 'for non confidential issues' do
        let(:target) { issue }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_all }
        end
        include_examples 'visible to assignee and author', true
      end

      context 'for confidential issues' do
        let(:target) { confidential_issue }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_none_except(:member, :admin) }
        end
        include_examples 'visible to assignee and author', true
      end
    end

    context 'issue note event' do
      context 'on non confidential issues' do
        let(:target) { note_on_issue }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_all }
        end
        include_examples 'visible to assignee and author', true
      end

      context 'on confidential issues' do
        let(:target) { note_on_confidential_issue }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_none_except(:member, :admin) }
        end
        include_examples 'visible to assignee and author', true
      end

      context 'private project' do
        let(:project) { private_project }
        let(:target) { note_on_issue }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_none_except(:guest, :member, :admin) }
        end

        include_examples 'visible to assignee and author', false
      end
    end

    context 'merge request diff note event' do
      let(:merge_request) { create(:merge_request, source_project: project, author: author, assignees: [assignee]) }
      let(:note_on_merge_request) { create(:legacy_diff_note_on_merge_request, noteable: merge_request, project: project) }
      let(:target) { note_on_merge_request }

      context 'public project' do
        let(:project) { public_project }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_all }
        end

        include_examples 'visible to assignee', true
      end

      context 'private project' do
        let(:project) { private_project }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_none_except(:member, :admin) }
        end

        include_examples 'visible to assignee', false
      end
    end

    context 'milestone event' do
      let(:target) { milestone_on_project }

      include_examples 'visibility examples' do
        let(:visibility) { visible_to_all }
      end

      context 'on public project with private issue tracker and merge requests' do
        let(:project) { create(:project, :public, :issues_private, :merge_requests_private) }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_all_except(:logged_out, :non_member) }
        end
      end

      context 'on private project' do
        let(:project) { create(:project, :private) }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_all_except(:logged_out, :non_member) }
        end
      end
    end

    context 'wiki-page event', :aggregate_failures do
      let(:event) { create(:wiki_page_event, project: project) }

      context 'on private project', :aggregate_failures do
        let(:project) { create(:project, :wiki_repo) }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_all_except(:logged_out, :non_member) }
        end
      end

      context 'wiki-page event on public project', :aggregate_failures do
        let(:project) { create(:project, :public, :wiki_repo) }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_all }
        end
      end
    end

    context 'project snippet note event' do
      let(:target) { note_on_project_snippet }

      include_examples 'visibility examples' do
        let(:visibility) { visible_to_all }
      end

      context 'on public project with private snippets' do
        let(:project) { create(:project, :public, :snippets_private) }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_none_except(:guest, :member, :admin) }
        end
        # Normally, we'd expect the author of a comment to be able to view it.
        # However, this doesn't seem to be the case for comments on snippets.
        include_examples 'visible to author', false
      end

      context 'on private project' do
        let(:project) { create(:project, :private) }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_none_except(:guest, :member, :admin) }
        end
        # Normally, we'd expect the author of a comment to be able to view it.
        # However, this doesn't seem to be the case for comments on snippets.
        include_examples 'visible to author', false
      end
    end

    context 'personal snippet note event' do
      let(:target) { note_on_personal_snippet }

      include_examples 'visibility examples' do
        let(:visibility) { visible_to_all }
      end
      include_examples 'visible to author', true

      context 'on internal snippet' do
        let(:personal_snippet) { create(:personal_snippet, :internal, author: author) }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_all_except(:logged_out) }
        end
      end

      context 'on private snippet' do
        let(:personal_snippet) { create(:personal_snippet, :private, author: author) }

        include_examples 'visibility examples' do
          let(:visibility) { visible_to_none_except(:admin) }
        end
        include_examples 'visible to author', true
      end
    end
  end

  describe 'wiki_page predicate scopes' do
    let_it_be(:events) do
      [
        create(:push_event),
        create(:closed_issue_event),
        create(:wiki_page_event),
        create(:closed_issue_event),
        create(:event, :created),
        create(:wiki_page_event)
      ]
    end

    describe '.for_wiki_page' do
      it 'only contains the wiki page events' do
        wiki_events = events.select(&:wiki_page?)

        expect(events).not_to match_array(wiki_events)
        expect(described_class.for_wiki_page).to match_array(wiki_events)
      end
    end

    describe '.not_wiki_page' do
      it 'does not contain the wiki page events' do
        non_wiki_events = events.reject(&:wiki_page?)

        expect(events).not_to match_array(non_wiki_events)
        expect(described_class.not_wiki_page).to match_array(non_wiki_events)
      end
    end
  end

  describe '#wiki_page and #wiki_page?' do
    let_it_be(:project) { create(:project, :repository) }

    context 'for a wiki page event' do
      let(:wiki_page) do
        create(:wiki_page, :with_real_page, project: project)
      end

      subject(:event) { create(:wiki_page_event, project: project, wiki_page: wiki_page) }

      it { is_expected.to have_attributes(wiki_page?: be_truthy, wiki_page: wiki_page) }
    end

    [:issue, :user, :merge_request, :snippet, :milestone, nil].each do |kind|
      context "for a #{kind} event" do
        it 'is nil' do
          target = create(kind) if kind
          event = create(:event, project: project, target: target)

          expect(event).to have_attributes(wiki_page: be_nil, wiki_page?: be_falsy)
        end
      end
    end
  end

  describe '.limit_recent' do
    let!(:event1) { create(:closed_issue_event) }
    let!(:event2) { create(:closed_issue_event) }

    describe 'without an explicit limit' do
      subject { described_class.limit_recent }

      it { is_expected.to eq([event2, event1]) }
    end

    describe 'with an explicit limit' do
      subject { described_class.limit_recent(1) }

      it { is_expected.to eq([event2]) }
    end
  end

  describe '#reset_project_activity' do
    let(:project) { create(:project) }

    context 'when a project was updated less than 1 hour ago' do
      it 'does not update the project' do
        project.update(last_activity_at: Time.now)

        expect(project).not_to receive(:update_column)
          .with(:last_activity_at, a_kind_of(Time))

        create_push_event(project, project.owner)
      end
    end

    context 'when a project was updated more than 1 hour ago' do
      it 'updates the project' do
        project.update(last_activity_at: 1.year.ago)

        create_push_event(project, project.owner)

        project.reload

        expect(project.last_activity_at).to be_within(1.minute).of(Time.now)
      end
    end
  end

  describe '#authored_by?' do
    let(:event) { build(:event) }

    it 'returns true when the event author and user are the same' do
      expect(event.authored_by?(event.author)).to eq(true)
    end

    it 'returns false when passing nil as an argument' do
      expect(event.authored_by?(nil)).to eq(false)
    end

    it 'returns false when the given user is not the author of the event' do
      user = double(:user, id: -1)

      expect(event.authored_by?(user)).to eq(false)
    end
  end

  describe '#body?' do
    let(:push_event) do
      event = build(:push_event)

      allow(event).to receive(:push?).and_return(true)

      event
    end

    it 'returns true for a push event with commits' do
      allow(push_event).to receive(:push_with_commits?).and_return(true)

      expect(push_event).to be_body
    end

    it 'returns false for a push event without a valid commit range' do
      allow(push_event).to receive(:push_with_commits?).and_return(false)

      expect(push_event).not_to be_body
    end

    it 'returns true for a Note event' do
      event = build(:event)

      allow(event).to receive(:note?).and_return(true)

      expect(event).to be_body
    end

    it 'returns true if the target responds to #title' do
      event = build(:event)

      allow(event).to receive(:target).and_return(double(:target, title: 'foo'))

      expect(event).to be_body
    end

    it 'returns false for a regular event without a target' do
      event = build(:event)

      expect(event).not_to be_body
    end
  end

  describe '#target' do
    it 'eager loads the author of an event target' do
      create(:closed_issue_event)

      events = described_class.preload(:target).all.to_a
      count = ActiveRecord::QueryRecorder
        .new { events.first.target.author }.count

      # This expectation exists to make sure the test doesn't pass when the
      # author is for some reason not loaded at all.
      expect(events.first.target.author).to be_an_instance_of(User)

      expect(count).to be_zero
    end
  end

  def create_push_event(project, user)
    event = create(:push_event, project: project, author: user)

    create(:push_event_payload,
           event: event,
           commit_to: '1cf19a015df3523caf0a1f9d40c98a267d6a2fc2',
           commit_count: 0,
           ref: 'master')

    event
  end
end