# frozen_string_literal: true

require 'spec_helper'

describe Ci::Runner do
  it_behaves_like 'having unique enum values'

  describe 'validation' do
    it { is_expected.to validate_presence_of(:access_level) }
    it { is_expected.to validate_presence_of(:runner_type) }

    context 'when runner is not allowed to pick untagged jobs' do
      context 'when runner does not have tags' do
        it 'is not valid' do
          runner = build(:ci_runner, tag_list: [], run_untagged: false)
          expect(runner).to be_invalid
        end
      end

      context 'when runner has tags' do
        it 'is valid' do
          runner = build(:ci_runner, tag_list: ['tag'], run_untagged: false)
          expect(runner).to be_valid
        end
      end
    end

    context '#exactly_one_group' do
      let(:group) { create(:group) }
      let(:runner) { create(:ci_runner, :group, groups: [group]) }

      it 'disallows assigning group if already assigned to a group' do
        runner.groups << build(:group)

        expect(runner).not_to be_valid
        expect(runner.errors.full_messages).to include('Runner needs to be assigned to exactly one group')
      end
    end

    context 'runner_type validations' do
      set(:group) { create(:group) }
      set(:project) { create(:project) }
      let(:group_runner) { create(:ci_runner, :group, groups: [group]) }
      let(:project_runner) { create(:ci_runner, :project, projects: [project]) }
      let(:instance_runner) { create(:ci_runner, :instance) }

      it 'disallows assigning group to project_type runner' do
        project_runner.groups << build(:group)

        expect(project_runner).not_to be_valid
        expect(project_runner.errors.full_messages).to include('Runner cannot have groups assigned')
      end

      it 'disallows assigning group to instance_type runner' do
        instance_runner.groups << build(:group)

        expect(instance_runner).not_to be_valid
        expect(instance_runner.errors.full_messages).to include('Runner cannot have groups assigned')
      end

      it 'disallows assigning project to group_type runner' do
        group_runner.projects << build(:project)

        expect(group_runner).not_to be_valid
        expect(group_runner.errors.full_messages).to include('Runner cannot have projects assigned')
      end

      it 'disallows assigning project to instance_type runner' do
        instance_runner.projects << build(:project)

        expect(instance_runner).not_to be_valid
        expect(instance_runner.errors.full_messages).to include('Runner cannot have projects assigned')
      end

      it 'fails to save a group assigned to a project runner even if the runner is already saved' do
        group.runners << project_runner
        expect { group.save! }
          .to raise_error(ActiveRecord::RecordInvalid)
      end
    end
  end

  describe 'constraints' do
    it '.UPDATE_CONTACT_COLUMN_EVERY' do
      expect(described_class::UPDATE_CONTACT_COLUMN_EVERY.max)
        .to be <= described_class::ONLINE_CONTACT_TIMEOUT
    end
  end

  describe '#access_level' do
    context 'when creating new runner and access_level is nil' do
      let(:runner) do
        build(:ci_runner, access_level: nil)
      end

      it "object is invalid" do
        expect(runner).not_to be_valid
      end
    end

    context 'when creating new runner and access_level is defined in enum' do
      let(:runner) do
        build(:ci_runner, access_level: :not_protected)
      end

      it "object is valid" do
        expect(runner).to be_valid
      end
    end

    context 'when creating new runner and access_level is not defined in enum' do
      it "raises an error" do
        expect { build(:ci_runner, access_level: :this_is_not_defined) }.to raise_error(ArgumentError)
      end
    end
  end

  describe '.instance_type' do
    let(:group) { create(:group) }
    let(:project) { create(:project) }
    let!(:group_runner) { create(:ci_runner, :group, groups: [group]) }
    let!(:project_runner) { create(:ci_runner, :project, projects: [project]) }
    let!(:shared_runner) { create(:ci_runner, :instance) }

    it 'returns only shared runners' do
      expect(described_class.instance_type).to contain_exactly(shared_runner)
    end
  end

  describe '.belonging_to_project' do
    it 'returns the specific project runner' do
      # own
      specific_project = create(:project)
      specific_runner = create(:ci_runner, :project, projects: [specific_project])

      # other
      other_project = create(:project)
      create(:ci_runner, :project, projects: [other_project])

      expect(described_class.belonging_to_project(specific_project.id)).to eq [specific_runner]
    end
  end

  describe '.belonging_to_parent_group_of_project' do
    let(:project) { create(:project, group: group) }
    let(:group) { create(:group) }
    let(:runner) { create(:ci_runner, :group, groups: [group]) }
    let!(:unrelated_group) { create(:group) }
    let!(:unrelated_project) { create(:project, group: unrelated_group) }
    let!(:unrelated_runner) { create(:ci_runner, :group, groups: [unrelated_group]) }

    it 'returns the specific group runner' do
      expect(described_class.belonging_to_parent_group_of_project(project.id)).to contain_exactly(runner)
    end

    context 'with a parent group with a runner' do
      let(:runner) { create(:ci_runner, :group, groups: [parent_group]) }
      let(:project) { create(:project, group: group) }
      let(:group) { create(:group, parent: parent_group) }
      let(:parent_group) { create(:group) }

      it 'returns the group runner from the parent group' do
        expect(described_class.belonging_to_parent_group_of_project(project.id)).to contain_exactly(runner)
      end
    end
  end

  describe '.owned_or_instance_wide' do
    it 'returns a globally shared, a project specific and a group specific runner' do
      # group specific
      group = create(:group)
      project = create(:project, group: group)
      group_runner = create(:ci_runner, :group, groups: [group])

      # project specific
      project_runner = create(:ci_runner, :project, projects: [project])

      # globally shared
      shared_runner = create(:ci_runner, :instance)

      expect(described_class.owned_or_instance_wide(project.id)).to contain_exactly(
        group_runner, project_runner, shared_runner
      )
    end
  end

  describe '#display_name' do
    it 'returns the description if it has a value' do
      runner = build(:ci_runner, description: 'Linux/Ruby-1.9.3-p448')
      expect(runner.display_name).to eq 'Linux/Ruby-1.9.3-p448'
    end

    it 'returns the token if it does not have a description' do
      runner = create(:ci_runner)
      expect(runner.display_name).to eq runner.description
    end

    it 'returns the token if the description is an empty string' do
      runner = build(:ci_runner, description: '', token: 'token')
      expect(runner.display_name).to eq runner.token
    end
  end

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

    subject { runner.assign_to(project) }

    context 'with shared_runner' do
      let(:runner) { create(:ci_runner, :instance) }

      it 'transitions shared runner to project runner and assigns project' do
        expect(subject).to be_truthy

        expect(runner).to be_project_type
        expect(runner.projects).to eq([project])
        expect(runner.only_for?(project)).to be_truthy
      end
    end

    context 'with group runner' do
      let(:group) { create(:group) }
      let(:runner) { create(:ci_runner, :group, groups: [group]) }

      it 'raises an error' do
        expect { subject }
          .to raise_error(ArgumentError, 'Transitioning a group runner to a project runner is not supported')
      end
    end
  end

  describe '.online' do
    subject { described_class.online }

    before do
      @runner1 = create(:ci_runner, :instance, contacted_at: 1.hour.ago)
      @runner2 = create(:ci_runner, :instance, contacted_at: 1.second.ago)
    end

    it { is_expected.to eq([@runner2])}
  end

  describe '#online?' do
    let(:runner) { create(:ci_runner, :instance) }

    subject { runner.online? }

    before do
      allow_any_instance_of(described_class).to receive(:cached_attribute).and_call_original
      allow_any_instance_of(described_class).to receive(:cached_attribute)
        .with(:platform).and_return("darwin")
    end

    context 'no cache value' do
      before do
        stub_redis_runner_contacted_at(nil)
      end

      context 'never contacted' do
        before do
          runner.contacted_at = nil
        end

        it { is_expected.to be_falsey }
      end

      context 'contacted long time ago time' do
        before do
          runner.contacted_at = 1.year.ago
        end

        it { is_expected.to be_falsey }
      end

      context 'contacted 1s ago' do
        before do
          runner.contacted_at = 1.second.ago
        end

        it { is_expected.to be_truthy }
      end
    end

    context 'with cache value' do
      context 'contacted long time ago time' do
        before do
          runner.contacted_at = 1.year.ago
          stub_redis_runner_contacted_at(1.year.ago.to_s)
        end

        it { is_expected.to be_falsey }
      end

      context 'contacted 1s ago' do
        before do
          runner.contacted_at = 50.minutes.ago
          stub_redis_runner_contacted_at(1.second.ago.to_s)
        end

        it { is_expected.to be_truthy }
      end
    end

    def stub_redis_runner_contacted_at(value)
      Gitlab::Redis::SharedState.with do |redis|
        cache_key = runner.send(:cache_attribute_key)
        expect(redis).to receive(:get).with(cache_key)
          .and_return({ contacted_at: value }.to_json).at_least(:once)
      end
    end
  end

  describe '.offline' do
    subject { described_class.offline }

    before do
      @runner1 = create(:ci_runner, :instance, contacted_at: 1.hour.ago)
      @runner2 = create(:ci_runner, :instance, contacted_at: 1.second.ago)
    end

    it { is_expected.to eq([@runner1])}
  end

  describe '#can_pick?' do
    set(:pipeline) { create(:ci_pipeline) }
    let(:build) { create(:ci_build, pipeline: pipeline) }
    let(:runner_project) { build.project }
    let(:runner) { create(:ci_runner, :project, projects: [runner_project], tag_list: tag_list, run_untagged: run_untagged) }
    let(:tag_list) { [] }
    let(:run_untagged) { true }

    subject { runner.can_pick?(build) }

    context 'a different runner' do
      let(:other_project) { create(:project) }
      let(:other_runner) { create(:ci_runner, :project, projects: [other_project], tag_list: tag_list, run_untagged: run_untagged) }

      it 'cannot handle builds' do
        expect(other_runner.can_pick?(build)).to be_falsey
      end
    end

    context 'when runner does not have tags' do
      it 'can handle builds without tags' do
        expect(runner.can_pick?(build)).to be_truthy
      end

      it 'cannot handle build with tags' do
        build.tag_list = ['aa']

        expect(runner.can_pick?(build)).to be_falsey
      end
    end

    context 'when runner has tags' do
      let(:tag_list) { %w(bb cc) }

      shared_examples 'tagged build picker' do
        it 'can handle build with matching tags' do
          build.tag_list = ['bb']

          expect(runner.can_pick?(build)).to be_truthy
        end

        it 'cannot handle build without matching tags' do
          build.tag_list = ['aa']

          expect(runner.can_pick?(build)).to be_falsey
        end
      end

      context 'when runner can pick untagged jobs' do
        it 'can handle builds without tags' do
          expect(runner.can_pick?(build)).to be_truthy
        end

        it_behaves_like 'tagged build picker'
      end

      context 'when runner cannot pick untagged jobs' do
        let(:run_untagged) { false }

        it 'cannot handle builds without tags' do
          expect(runner.can_pick?(build)).to be_falsey
        end

        it_behaves_like 'tagged build picker'
      end
    end

    context 'when runner is shared' do
      let(:runner) { create(:ci_runner, :instance) }

      it 'can handle builds' do
        expect(runner.can_pick?(build)).to be_truthy
      end

      context 'when runner is locked' do
        let(:runner) { create(:ci_runner, :instance, locked: true) }

        it 'can handle builds' do
          expect(runner.can_pick?(build)).to be_truthy
        end
      end
    end

    context 'when runner is not shared' do
      context 'when runner is assigned to a project' do
        it 'can handle builds' do
          expect(runner.can_pick?(build)).to be_truthy
        end
      end

      context 'when runner is assigned to another project' do
        let(:runner_project) { create(:project) }

        it 'cannot handle builds' do
          expect(runner.can_pick?(build)).to be_falsey
        end
      end

      context 'when runner is assigned to a group' do
        let(:group) { create(:group, projects: [build.project]) }
        let(:runner) { create(:ci_runner, :group, tag_list: tag_list, run_untagged: run_untagged, groups: [group]) }

        it 'can handle builds' do
          expect(runner.can_pick?(build)).to be_truthy
        end
      end
    end

    context 'when access_level of runner is not_protected' do
      before do
        runner.not_protected!
      end

      context 'when build is protected' do
        before do
          build.protected = true
        end

        it { is_expected.to be_truthy }
      end

      context 'when build is unprotected' do
        before do
          build.protected = false
        end

        it { is_expected.to be_truthy }
      end
    end

    context 'when access_level of runner is ref_protected' do
      before do
        runner.ref_protected!
      end

      context 'when build is protected' do
        before do
          build.protected = true
        end

        it { is_expected.to be_truthy }
      end

      context 'when build is unprotected' do
        before do
          build.protected = false
        end

        it { is_expected.to be_falsey }
      end
    end
  end

  describe '#status' do
    let(:runner) { create(:ci_runner, :instance, contacted_at: 1.second.ago) }

    subject { runner.status }

    context 'never connected' do
      before do
        runner.contacted_at = nil
      end

      it { is_expected.to eq(:not_connected) }
    end

    context 'contacted 1s ago' do
      before do
        runner.contacted_at = 1.second.ago
      end

      it { is_expected.to eq(:online) }
    end

    context 'contacted long time ago' do
      before do
        runner.contacted_at = 1.year.ago
      end

      it { is_expected.to eq(:offline) }
    end

    context 'inactive' do
      before do
        runner.active = false
      end

      it { is_expected.to eq(:paused) }
    end
  end

  describe '#tick_runner_queue' do
    let(:runner) { create(:ci_runner) }

    it 'returns a new last_update value' do
      expect(runner.tick_runner_queue).not_to be_empty
    end
  end

  describe '#ensure_runner_queue_value' do
    let(:runner) { create(:ci_runner) }

    it 'sets a new last_update value when it is called the first time' do
      last_update = runner.ensure_runner_queue_value

      expect_value_in_queues.to eq(last_update)
    end

    it 'does not change if it is not expired and called again' do
      last_update = runner.ensure_runner_queue_value

      expect(runner.ensure_runner_queue_value).to eq(last_update)
      expect_value_in_queues.to eq(last_update)
    end

    context 'updates runner queue after changing editable value' do
      let!(:last_update) { runner.ensure_runner_queue_value }

      before do
        Ci::UpdateRunnerService.new(runner).update(description: 'new runner')
      end

      it 'sets a new last_update value' do
        expect_value_in_queues.not_to eq(last_update)
      end
    end

    context 'does not update runner value after save' do
      let!(:last_update) { runner.ensure_runner_queue_value }

      before do
        runner.touch
      end

      it 'has an old last_update value' do
        expect_value_in_queues.to eq(last_update)
      end
    end

    def expect_value_in_queues
      Gitlab::Redis::SharedState.with do |redis|
        runner_queue_key = runner.send(:runner_queue_key)
        expect(redis.get(runner_queue_key))
      end
    end
  end

  describe '#update_cached_info' do
    let(:runner) { create(:ci_runner, :project) }

    subject { runner.update_cached_info(architecture: '18-bit') }

    context 'when database was updated recently' do
      before do
        runner.contacted_at = Time.now
      end

      it 'updates cache' do
        expect_redis_update

        subject
      end
    end

    context 'when database was not updated recently' do
      before do
        runner.contacted_at = 2.hours.ago
      end

      context 'with invalid runner' do
        before do
          runner.projects = []
        end

        it 'still updates redis cache and database' do
          expect(runner).to be_invalid

          expect_redis_update
          does_db_update
        end
      end

      it 'updates redis cache and database' do
        expect_redis_update
        does_db_update
      end
    end

    def expect_redis_update
      Gitlab::Redis::SharedState.with do |redis|
        redis_key = runner.send(:cache_attribute_key)
        expect(redis).to receive(:set).with(redis_key, anything, any_args)
      end
    end

    def does_db_update
      expect { subject }.to change { runner.reload.read_attribute(:contacted_at) }
        .and change { runner.reload.read_attribute(:architecture) }
    end
  end

  describe '#destroy' do
    let(:runner) { create(:ci_runner) }

    context 'when there is a tick in the queue' do
      let!(:queue_key) { runner.send(:runner_queue_key) }

      before do
        runner.tick_runner_queue
        runner.destroy
      end

      it 'cleans up the queue' do
        Gitlab::Redis::SharedState.with do |redis|
          expect(redis.get(queue_key)).to be_nil
        end
      end
    end
  end

  describe '.assignable_for' do
    let(:project) { create(:project) }
    let(:group) { create(:group) }
    let(:another_project) { create(:project) }
    let!(:unlocked_project_runner) { create(:ci_runner, :project, projects: [project]) }
    let!(:locked_project_runner) { create(:ci_runner, :project, locked: true, projects: [project]) }
    let!(:group_runner) { create(:ci_runner, :group, groups: [group]) }
    let!(:instance_runner) { create(:ci_runner, :instance) }

    context 'with already assigned project' do
      subject { described_class.assignable_for(project) }

      it { is_expected.to be_empty }
    end

    context 'with a different project' do
      subject { described_class.assignable_for(another_project) }

      it { is_expected.to include(unlocked_project_runner) }
      it { is_expected.not_to include(group_runner) }
      it { is_expected.not_to include(locked_project_runner) }
      it { is_expected.not_to include(instance_runner) }
    end
  end

  describe "belongs_to_one_project?" do
    it "returns false if there are two projects runner assigned to" do
      project1 = create(:project)
      project2 = create(:project)
      runner = create(:ci_runner, :project, projects: [project1, project2])

      expect(runner.belongs_to_one_project?).to be_falsey
    end

    it "returns true" do
      project = create(:project)
      runner = create(:ci_runner, :project, projects: [project])

      expect(runner.belongs_to_one_project?).to be_truthy
    end
  end

  describe '#has_tags?' do
    context 'when runner has tags' do
      subject { create(:ci_runner, tag_list: ['tag']) }
      it { is_expected.to have_tags }
    end

    context 'when runner does not have tags' do
      subject { create(:ci_runner, tag_list: []) }
      it { is_expected.not_to have_tags }
    end
  end

  describe '.search' do
    let(:runner) { create(:ci_runner, token: '123abc', description: 'test runner') }

    it 'returns runners with a matching token' do
      expect(described_class.search(runner.token)).to eq([runner])
    end

    it 'returns runners with a partially matching token' do
      expect(described_class.search(runner.token[0..2])).to eq([runner])
    end

    it 'returns runners with a matching token regardless of the casing' do
      expect(described_class.search(runner.token.upcase)).to eq([runner])
    end

    it 'returns runners with a matching description' do
      expect(described_class.search(runner.description)).to eq([runner])
    end

    it 'returns runners with a partially matching description' do
      expect(described_class.search(runner.description[0..2])).to eq([runner])
    end

    it 'returns runners with a matching description regardless of the casing' do
      expect(described_class.search(runner.description.upcase)).to eq([runner])
    end
  end

  describe '#assigned_to_group?' do
    subject { runner.assigned_to_group? }

    context 'when project runner' do
      let(:runner) { create(:ci_runner, :project, description: 'Project runner', projects: [project]) }
      let(:project) { create(:project) }

      it { is_expected.to be_falsey }
    end

    context 'when shared runner' do
      let(:runner) { create(:ci_runner, :instance, description: 'Shared runner') }

      it { is_expected.to be_falsey }
    end

    context 'when group runner' do
      let(:group) { create(:group) }
      let(:runner) { create(:ci_runner, :group, description: 'Group runner', groups: [group]) }

      it { is_expected.to be_truthy }
    end
  end

  describe '#assigned_to_project?' do
    subject { runner.assigned_to_project? }

    context 'when group runner' do
      let(:runner) { create(:ci_runner, :group, description: 'Group runner', groups: [group]) }
      let(:group) { create(:group) }
      it { is_expected.to be_falsey }
    end

    context 'when shared runner' do
      let(:runner) { create(:ci_runner, :instance, description: 'Shared runner') }
      it { is_expected.to be_falsey }
    end

    context 'when project runner' do
      let(:runner) { create(:ci_runner, :project, description: 'Project runner', projects: [project]) }
      let(:project) { create(:project) }

      it { is_expected.to be_truthy }
    end
  end

  describe '#pick_build!' do
    context 'runner can pick the build' do
      it 'calls #tick_runner_queue' do
        ci_build = build(:ci_build)
        runner = build(:ci_runner)
        allow(runner).to receive(:can_pick?).with(ci_build).and_return(true)

        expect(runner).to receive(:tick_runner_queue)

        runner.pick_build!(ci_build)
      end
    end

    context 'runner cannot pick the build' do
      it 'does not call #tick_runner_queue' do
        ci_build = build(:ci_build)
        runner = build(:ci_runner)
        allow(runner).to receive(:can_pick?).with(ci_build).and_return(false)

        expect(runner).not_to receive(:tick_runner_queue)

        runner.pick_build!(ci_build)
      end
    end
  end

  describe 'project runner without projects is destroyable' do
    subject { create(:ci_runner, :project, :without_projects) }

    it 'does not have projects' do
      expect(subject.runner_projects).to be_empty
    end

    it 'can be destroyed' do
      subject
      expect { subject.destroy }.to change { described_class.count }.by(-1)
    end
  end

  describe '.order_by' do
    it 'supports ordering by the contact date' do
      runner1 = create(:ci_runner, contacted_at: 1.year.ago)
      runner2 = create(:ci_runner, contacted_at: 1.month.ago)
      runners = described_class.order_by('contacted_asc')

      expect(runners).to eq([runner1, runner2])
    end

    it 'supports ordering by the creation date' do
      runner1 = create(:ci_runner, created_at: 1.year.ago)
      runner2 = create(:ci_runner, created_at: 1.month.ago)
      runners = described_class.order_by('created_asc')

      expect(runners).to eq([runner2, runner1])
    end
  end

  describe '#uncached_contacted_at' do
    let(:contacted_at_stored) { 1.hour.ago.change(usec: 0) }
    let(:runner) { create(:ci_runner, contacted_at: contacted_at_stored) }

    subject { runner.uncached_contacted_at }

    it { is_expected.to eq(contacted_at_stored) }
  end
end
