# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Groups::ObservabilityController do
  include ContentSecurityPolicyHelpers

  let_it_be(:group) { create(:group) }
  let_it_be(:user) { create(:user) }

  let(:observability_url) { Gitlab::Observability.observability_url }
  let(:expected_observability_path) { "/" }

  shared_examples 'observability route request' do
    subject do
      get path
      response
    end

    context 'when user is not authenticated' do
      it 'returns 404' do
        expect(subject).to have_gitlab_http_status(:not_found)
      end
    end

    context 'when user is not a developer' do
      before do
        sign_in(user)
      end

      it 'returns 404' do
        expect(subject).to have_gitlab_http_status(:not_found)
      end
    end

    context 'when user is authenticated and a developer' do
      before do
        sign_in(user)
        group.add_developer(user)
      end

      context 'when observability url is missing' do
        before do
          allow(Gitlab::Observability).to receive(:observability_url).and_return("")
        end

        it 'returns 404' do
          expect(subject).to have_gitlab_http_status(:not_found)
        end
      end

      it 'returns 200' do
        expect(subject).to have_gitlab_http_status(:ok)
      end

      it 'renders the proper layout' do
        expect(subject).to render_template("layouts/group")
        expect(subject).to render_template("layouts/fullscreen")
        expect(subject).not_to render_template('layouts/nav/breadcrumbs')
        expect(subject).to render_template("nav/sidebar/_group")
        expect(subject).to render_template("groups/observability/observability")
      end

      it 'renders the js-observability-app element correctly' do
        element = Nokogiri::HTML.parse(subject.body).at_css('#js-observability-app')
        expect(element.attributes['data-observability-iframe-src'].value).to eq(expected_observability_path)
      end
    end
  end

  describe 'GET #dashboards' do
    let(:path) { group_observability_dashboards_path(group) }
    let(:expected_observability_path) { "#{observability_url}/#{group.id}/" }

    it_behaves_like 'observability route request'
  end

  describe 'GET #manage' do
    let(:path) { group_observability_manage_path(group) }
    let(:expected_observability_path) { "#{observability_url}/#{group.id}/dashboards" }

    it_behaves_like 'observability route request'
  end

  describe 'GET #explore' do
    let(:path) { group_observability_explore_path(group) }
    let(:expected_observability_path) { "#{observability_url}/#{group.id}/explore" }

    it_behaves_like 'observability route request'
  end

  describe 'CSP' do
    before do
      setup_csp_for_controller(described_class, csp)
    end

    subject do
      get group_observability_dashboards_path(group)
      response.headers['Content-Security-Policy']
    end

    context 'when there is no CSP config' do
      let(:csp) { ActionDispatch::ContentSecurityPolicy.new }

      it 'does not add any csp header' do
        expect(subject).to be_blank
      end
    end

    context 'when frame-src exists in the CSP config' do
      let(:csp) do
        ActionDispatch::ContentSecurityPolicy.new do |p|
          p.frame_src 'https://something.test'
        end
      end

      it 'appends the proper url to frame-src CSP directives' do
        expect(subject).to include(
          "frame-src https://something.test #{observability_url} 'self'")
      end
    end

    context 'when self is already present in the policy' do
      let(:csp) do
        ActionDispatch::ContentSecurityPolicy.new do |p|
          p.frame_src "'self'"
        end
      end

      it 'does not append self again' do
        expect(subject).to include(
          "frame-src 'self' #{observability_url};")
      end
    end

    context 'when default-src exists in the CSP config' do
      let(:csp) do
        ActionDispatch::ContentSecurityPolicy.new do |p|
          p.default_src 'https://something.test'
        end
      end

      it 'does not change default-src' do
        expect(subject).to include(
          "default-src https://something.test;")
      end

      it 'appends the proper url to frame-src CSP directives' do
        expect(subject).to include(
          "frame-src https://something.test #{observability_url} 'self'")
      end
    end

    context 'when frame-src and default-src exist in the CSP config' do
      let(:csp) do
        ActionDispatch::ContentSecurityPolicy.new do |p|
          p.default_src 'https://something_default.test'
          p.frame_src 'https://something.test'
        end
      end

      it 'appends to frame-src CSP directives' do
        expect(subject).to include(
          "frame-src https://something.test #{observability_url} 'self'")
        expect(subject).to include(
          "default-src https://something_default.test")
      end
    end
  end
end