# frozen_string_literal: true

require 'spec_helper'

describe Projects::LogsController do
  include KubernetesHelpers

  set(:user) { create(:user) }
  set(:project) { create(:project) }

  set(:environment) do
    create(:environment, name: 'production', project: project)
  end

  let(:pod_name) { "foo" }
  let(:container) { 'container-1' }

  before do
    project.add_maintainer(user)

    sign_in(user)
  end

  describe 'GET #index' do
    context 'when unlicensed' do
      before do
        stub_licensed_features(pod_logs: false)
      end

      it 'renders forbidden' do
        get :index, params: environment_params

        expect(response).to have_gitlab_http_status(:not_found)
      end
    end

    context 'when licensed' do
      before do
        stub_licensed_features(pod_logs: true)
      end

      let(:empty_project) { create(:project) }

      it 'renders empty logs page if no environment exists' do
        empty_project.add_maintainer(user)
        get :index, params: { namespace_id: empty_project.namespace, project_id: empty_project }

        expect(response).to be_ok
        expect(response).to render_template 'empty_logs'
      end

      it 'renders index template' do
        get :index, params: environment_params

        expect(response).to be_ok
        expect(response).to render_template 'index'
      end
    end
  end

  describe "GET #k8s" do
    let(:service_result) do
      {
        status: :success,
        logs: ['Log 1', 'Log 2', 'Log 3'],
        message: 'message',
        pods: [pod_name],
        pod_name: pod_name,
        container_name: container
      }
    end

    before do
      stub_licensed_features(pod_logs: true)

      allow_any_instance_of(PodLogsService).to receive(:execute).and_return(service_result)
    end

    shared_examples 'resource not found' do |message|
      it 'returns 400', :aggregate_failures do
        get :k8s, params: environment_params(pod_name: pod_name, format: :json)

        expect(response).to have_gitlab_http_status(:bad_request)
        expect(json_response['message']).to eq(message)
        expect(json_response['pods']).to match_array([pod_name])
        expect(json_response['pod_name']).to eq(pod_name)
        expect(json_response['container_name']).to eq(container)
      end
    end

    it 'returns the logs for a specific pod', :aggregate_failures do
      get :k8s, params: environment_params(pod_name: pod_name, format: :json)

      expect(response).to have_gitlab_http_status(:success)
      expect(json_response["logs"]).to match_array(["Log 1", "Log 2", "Log 3"])
      expect(json_response["pods"]).to match_array([pod_name])
      expect(json_response['message']).to eq(service_result[:message])
      expect(json_response['pod_name']).to eq(pod_name)
      expect(json_response['container_name']).to eq(container)
    end

    it 'registers a usage of the endpoint' do
      expect(::Gitlab::UsageCounters::PodLogs).to receive(:increment).with(project.id)

      get :k8s, params: environment_params(pod_name: pod_name, format: :json)
    end

    context 'when kubernetes API returns error' do
      let(:service_result) do
        {
          status: :error,
          message: 'Kubernetes API returned status code: 400',
          pods: [pod_name],
          pod_name: pod_name,
          container_name: container
        }
      end

      it 'returns bad request' do
        get :k8s, params: environment_params(pod_name: pod_name, format: :json)

        expect(response).to have_gitlab_http_status(:bad_request)
        expect(json_response["logs"]).to eq(nil)
        expect(json_response["pods"]).to match_array([pod_name])
        expect(json_response["message"]).to eq('Kubernetes API returned status code: 400')
        expect(json_response['pod_name']).to eq(pod_name)
        expect(json_response['container_name']).to eq(container)
      end
    end

    context 'when pod does not exist' do
      let(:service_result) do
        {
          status: :error,
          message: 'Pod not found',
          pods: [pod_name],
          pod_name: pod_name,
          container_name: container
        }
      end

      it_behaves_like 'resource not found', 'Pod not found'
    end

    context 'when service returns error without pods, pod_name, container_name' do
      let(:service_result) do
        {
          status: :error,
          message: 'No deployment platform'
        }
      end

      it 'returns the error without pods, pod_name and container_name' do
        get :k8s, params: environment_params(pod_name: pod_name, format: :json)

        expect(response).to have_gitlab_http_status(:bad_request)
        expect(json_response['message']).to eq('No deployment platform')
        expect(json_response.keys).to contain_exactly('message', 'status')
      end
    end

    context 'when service returns status processing' do
      let(:service_result) { { status: :processing } }

      it 'renders accepted' do
        get :k8s, params: environment_params(pod_name: pod_name, format: :json)

        expect(response).to have_gitlab_http_status(:accepted)
      end
    end
  end

  def environment_params(opts = {})
    opts.reverse_merge(namespace_id: project.namespace,
                       project_id: project,
                       environment_name: environment.name)
  end
end
