require 'spec_helper'

describe Clusters::ClusterPresenter do
  include Gitlab::Routing.url_helpers

  let(:cluster) { create(:cluster, :provided_by_gcp, :project) }
  let(:user) { create(:user) }

  subject(:presenter) do
    described_class.new(cluster, current_user: user)
  end

  it 'inherits from Gitlab::View::Presenter::Delegated' do
    expect(described_class.superclass).to eq(Gitlab::View::Presenter::Delegated)
  end

  describe '#initialize' do
    it 'takes a cluster and optional params' do
      expect { presenter }.not_to raise_error
    end

    it 'exposes cluster' do
      expect(presenter.cluster).to eq(cluster)
    end

    it 'forwards missing methods to cluster' do
      expect(presenter.status).to eq(cluster.status)
    end
  end

  describe '#item_link' do
    let(:clusterable_presenter) { double('ClusterablePresenter', subject: clusterable) }

    subject { presenter.item_link(clusterable_presenter) }

    context 'for a group cluster' do
      let(:cluster) { create(:cluster, cluster_type: :group_type, groups: [group]) }
      let(:group) { create(:group, name: 'Foo') }
      let(:cluster_link) { "<a href=\"#{group_cluster_path(cluster.group, cluster)}\">#{cluster.name}</a>" }

      before do
        group.add_maintainer(user)
      end

      shared_examples 'ancestor clusters' do
        context 'ancestor clusters', :nested_groups do
          let(:root_group) { create(:group, name: 'Root Group') }
          let(:parent) { create(:group, name: 'parent', parent: root_group) }
          let(:child) { create(:group, name: 'child', parent: parent) }
          let(:group) { create(:group, name: 'group', parent: child) }

          before do
            root_group.add_maintainer(user)
          end

          context 'top level group cluster' do
            let(:cluster) { create(:cluster, cluster_type: :group_type, groups: [root_group]) }

            it 'returns full group names and link for cluster' do
              expect(subject).to eq("Root Group / #{cluster_link}")
            end

            it 'is html safe' do
              expect(presenter).to receive(:sanitize).with('Root Group').and_call_original

              expect(subject).to be_html_safe
            end
          end

          context 'first level group cluster' do
            let(:cluster) { create(:cluster, cluster_type: :group_type, groups: [parent]) }

            it 'returns full group names and link for cluster' do
              expect(subject).to eq("Root Group / parent / #{cluster_link}")
            end

            it 'is html safe' do
              expect(presenter).to receive(:sanitize).with('Root Group / parent').and_call_original

              expect(subject).to be_html_safe
            end
          end

          context 'second level group cluster' do
            let(:cluster) { create(:cluster, cluster_type: :group_type, groups: [child]) }

            let(:ellipsis_h) do
              /.*ellipsis_h.*/
            end

            it 'returns clipped group names and link for cluster' do
              expect(subject).to match("Root Group / #{ellipsis_h} / child / #{cluster_link}")
            end

            it 'is html safe' do
              expect(presenter).to receive(:sanitize).with('Root Group / parent / child').and_call_original

              expect(subject).to be_html_safe
            end
          end
        end
      end

      context 'for a project clusterable' do
        let(:clusterable) { project }
        let(:project) { create(:project, group: group) }

        it 'returns the group name and the link for cluster' do
          expect(subject).to eq("Foo / #{cluster_link}")
        end

        it 'is html safe' do
          expect(presenter).to receive(:sanitize).with('Foo').and_call_original

          expect(subject).to be_html_safe
        end

        include_examples 'ancestor clusters'
      end

      context 'for the group clusterable for the cluster' do
        let(:clusterable) { group }

        it 'returns link for cluster' do
          expect(subject).to eq(cluster_link)
        end

        include_examples 'ancestor clusters'

        it 'is html safe' do
          expect(subject).to be_html_safe
        end
      end
    end

    context 'for a project cluster' do
      let(:cluster) { create(:cluster, :project) }
      let(:cluster_link) { "<a href=\"#{project_cluster_path(cluster.project, cluster)}\">#{cluster.name}</a>" }

      before do
        cluster.project.add_maintainer(user)
      end

      context 'for the project clusterable' do
        let(:clusterable) { cluster.project }

        it 'returns link for cluster' do
          expect(subject).to eq(cluster_link)
        end
      end
    end
  end

  describe '#gke_cluster_url' do
    subject { described_class.new(cluster).gke_cluster_url }

    it { is_expected.to include(cluster.provider.zone) }
    it { is_expected.to include(cluster.name) }
  end

  describe '#can_toggle_cluster' do
    let(:user) { create(:user) }

    before do
      allow(cluster).to receive(:current_user).and_return(user)
    end

    subject { described_class.new(cluster).can_toggle_cluster? }

    context 'when user can update' do
      before do
        allow_any_instance_of(described_class).to receive(:can?).with(user, :update_cluster, cluster).and_return(true)
      end

      context 'when cluster is created' do
        before do
          allow(cluster).to receive(:created?).and_return(true)
        end

        it { is_expected.to eq(true) }
      end

      context 'when cluster is not created' do
        before do
          allow(cluster).to receive(:created?).and_return(false)
        end

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

    context 'when user can not update' do
      before do
        allow_any_instance_of(described_class).to receive(:can?).with(user, :update_cluster, cluster).and_return(false)
      end

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

  describe '#cluster_type_description' do
    subject { described_class.new(cluster).cluster_type_description }

    context 'project_type cluster' do
      it { is_expected.to eq('Project cluster') }
    end

    context 'group_type cluster' do
      let(:cluster) { create(:cluster, :provided_by_gcp, :group) }

      it { is_expected.to eq('Group cluster') }
    end
  end

  describe '#show_path' do
    subject { described_class.new(cluster).show_path }

    context 'project_type cluster' do
      let(:project) { cluster.project }

      it { is_expected.to eq(project_cluster_path(project, cluster)) }
    end

    context 'group_type cluster' do
      let(:group) { cluster.group }
      let(:cluster) { create(:cluster, :provided_by_gcp, :group) }

      it { is_expected.to eq(group_cluster_path(group, cluster)) }
    end
  end
end