# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Deployments::UpdateEnvironmentService do
  let(:user) { create(:user) }
  let(:project) { create(:project, :repository) }
  let(:options) { { name: environment_name } }
  let(:pipeline) do
    create(
      :ci_pipeline,
      sha: 'b83d6e391c22777fca1ed3012fce84f633d7fed0',
      project: project
    )
  end

  let(:job) do
    create(:ci_build,
      :with_deployment,
      pipeline: pipeline,
      ref: 'master',
      tag: false,
      environment: environment_name,
      options: { environment: options },
      project: project)
  end

  let(:deployment) { job.deployment }
  let(:environment) { deployment.environment }
  let(:environment_name) { 'production' }

  subject(:service) { described_class.new(deployment) }

  before do
    allow(Deployments::LinkMergeRequestWorker).to receive(:perform_async)
    allow(Deployments::HooksWorker).to receive(:perform_async)
    job.success! # Create/Succeed deployment
  end

  describe '#execute' do
    let(:store) { Gitlab::EtagCaching::Store.new }

    it 'invalidates the environment etag cache' do
      old_value = store.get(environment.etag_cache_key)

      service.execute

      expect(store.get(environment.etag_cache_key)).not_to eq(old_value)
    end

    it 'creates ref' do
      expect_any_instance_of(Repository)
        .to receive(:create_ref)
        .with(deployment.sha, "refs/environments/production/deployments/#{deployment.iid}")

      service.execute
    end

    it 'updates merge request metrics' do
      expect_any_instance_of(Deployment)
        .to receive(:update_merge_request_metrics!)

      service.execute
    end

    it 'returns the deployment' do
      expect(subject.execute).to eq(deployment)
    end

    it 'returns the deployment when could not save the environment' do
      allow(environment).to receive(:save).and_return(false)

      expect(subject.execute).to eq(deployment)
    end

    it 'returns the deployment when environment is stopped' do
      allow(environment).to receive(:stopped?).and_return(true)

      expect(subject.execute).to eq(deployment)
    end

    context 'when start action is defined' do
      let(:options) { { name: 'production', action: 'start' } }

      context 'and environment is stopped' do
        before do
          environment.stop
        end

        it 'makes environment available' do
          service.execute

          expect(environment.reload).to be_available
        end
      end
    end

    context 'when external URL is specified and the tier is unset' do
      let(:options) { { name: 'production', url: external_url } }

      before do
        environment.update_columns(external_url: external_url, tier: nil)
        job.update!(environment: 'production')
      end

      context 'when external URL is valid' do
        let(:external_url) { 'https://google.com' }

        it 'succeeds to update the tier automatically' do
          expect { subject.execute }.to change { environment.tier }.from(nil).to('production')
        end
      end

      context 'when external URL is invalid' do
        let(:external_url) { 'google.com' }

        it 'fails to update the tier due to validation error' do
          expect { subject.execute }.not_to change { environment.tier }
        end

        it 'tracks an exception' do
          expect(Gitlab::ErrorTracking).to receive(:track_exception)
            .with(an_instance_of(described_class::EnvironmentUpdateFailure),
                  project_id: project.id,
                  environment_id: environment.id,
                  reason: %q{External url is blocked: Only allowed schemes are http, https})
            .once

          subject.execute
        end
      end
    end

    context 'when variables are used' do
      let(:options) do
        { name: 'review-apps/$CI_COMMIT_REF_NAME',
          url: 'http://$CI_COMMIT_REF_NAME.review-apps.gitlab.com' }
      end

      before do
        environment.update!(name: 'review-apps/master')
        job.update!(environment: 'review-apps/$CI_COMMIT_REF_NAME')
      end

      it 'does not create a new environment' do
        expect { subject.execute }.not_to change { Environment.count }
      end

      it 'updates external url' do
        subject.execute

        expect(subject.environment.name).to eq('review-apps/master')
        expect(subject.environment.external_url).to eq('http://master.review-apps.gitlab.com')
      end
    end

    context 'when auto_stop_in are used' do
      let(:options) do
        { name: 'production', auto_stop_in: '1 day' }
      end

      it 'renews auto stop at' do
        freeze_time do
          environment.update!(auto_stop_at: nil)

          expect { subject.execute }
            .to change { environment.reset.auto_stop_at&.round }.from(nil).to(1.day.since.round)
        end
      end
    end

    context 'when deployment tier is specified' do
      let(:environment_name) { 'customer-portal' }
      let(:options) { { name: environment_name, deployment_tier: 'production' } }

      context 'when tier has already been set' do
        before do
          environment.update_column(:tier, Environment.tiers[:other])
        end

        it 'overwrites the guessed tier by the specified deployment tier' do
          expect { subject.execute }
            .to change { environment.reset.tier }.from('other').to('production')
        end
      end

      context 'when tier has not been set' do
        before do
          environment.update_column(:tier, nil)
        end

        it 'sets the specified deployment tier' do
          expect { subject.execute }
            .to change { environment.reset.tier }.from(nil).to('production')
        end

        context 'when deployment was created by an external CD system' do
          before do
            deployment.update_column(:deployable_id, nil)
            deployment.reload
          end

          it 'guesses the deployment tier' do
            expect { subject.execute }
              .to change { environment.reset.tier }.from(nil).to('other')
          end
        end
      end
    end

    context 'when deployment tier is not specified' do
      let(:environment_name) { 'customer-portal' }
      let(:options) { { name: environment_name } }

      it 'guesses the deployment tier' do
        environment.update_column(:tier, nil)

        expect { subject.execute }
          .to change { environment.reset.tier }.from(nil).to('other')
      end
    end
  end

  describe '#expanded_environment_url' do
    subject { service.send(:expanded_environment_url) }

    context 'when yaml environment uses $CI_COMMIT_REF_NAME' do
      let(:job) do
        create(:ci_build,
               :with_deployment,
               pipeline: pipeline,
               ref: 'master',
               environment: 'production',
               project: project,
               options: { environment: { name: 'production', url: 'http://review/$CI_COMMIT_REF_NAME' } })
      end

      it { is_expected.to eq('http://review/master') }
    end

    context 'when yaml environment uses $CI_ENVIRONMENT_SLUG' do
      let(:job) do
        create(:ci_build,
               :with_deployment,
               pipeline: pipeline,
               ref: 'master',
               environment: 'prod-slug',
               project: project,
               options: { environment: { name: 'prod-slug', url: 'http://review/$CI_ENVIRONMENT_SLUG' } })
      end

      it { is_expected.to eq('http://review/prod-slug') }
    end

    context 'when yaml environment uses yaml_variables containing symbol keys' do
      let(:job) do
        create(:ci_build,
               :with_deployment,
               pipeline: pipeline,
               yaml_variables: [{ key: :APP_HOST, value: 'host' }],
               environment: 'production',
               project: project,
               options: { environment: { name: 'production', url: 'http://review/$APP_HOST' } })
      end

      it { is_expected.to eq('http://review/host') }
    end

    context 'when job variables are generated during runtime' do
      let(:job) do
        create(:ci_build,
               :with_deployment,
               pipeline: pipeline,
               environment: 'review/$CI_COMMIT_REF_NAME',
               project: project,
               job_variables: [job_variable],
               options: { environment: { name: 'review/$CI_COMMIT_REF_NAME', url: 'http://$DYNAMIC_ENV_URL' } })
      end

      let(:job_variable) do
        build(:ci_job_variable, :dotenv_source, key: 'DYNAMIC_ENV_URL', value: 'abc.test.com')
      end

      it 'expands the environment URL from the dynamic variable' do
        is_expected.to eq('http://abc.test.com')
      end
    end

    context 'when yaml environment does not have url' do
      let(:job) { create(:ci_build, :with_deployment, pipeline: pipeline, environment: 'staging', project: project) }

      it 'returns the external_url from persisted environment' do
        is_expected.to be_nil
      end
    end
  end

  describe "merge request metrics" do
    let(:merge_request) { create(:merge_request, target_branch: 'master', source_branch: 'feature', source_project: project) }

    context "while updating the 'first_deployed_to_production_at' time" do
      before do
        merge_request.metrics.update!(merged_at: 1.hour.ago)
      end

      context "for merge requests merged before the current deploy" do
        it "sets the time if the deploy's environment is 'production'" do
          service.execute

          expect(merge_request.reload.metrics.first_deployed_to_production_at).to be_like_time(deployment.finished_at)
        end

        context 'when job deploys to staging' do
          let(:job) do
            create(:ci_build,
              :with_deployment,
              pipeline: pipeline,
              ref: 'master',
              tag: false,
              environment: 'staging',
              options: { environment: { name: 'staging' } },
              project: project)
          end

          it "doesn't set the time if the deploy's environment is not 'production'" do
            service.execute

            expect(merge_request.reload.metrics.first_deployed_to_production_at).to be_nil
          end
        end

        it 'does not raise errors if the merge request does not have a metrics record' do
          merge_request.metrics.destroy!

          expect(merge_request.reload.metrics).to be_nil
          expect { service.execute }.not_to raise_error
        end
      end

      context "for merge requests merged before the previous deploy" do
        context "if the 'first_deployed_to_production_at' time is already set" do
          it "does not overwrite the older 'first_deployed_to_production_at' time" do
            # Previous deploy
            service.execute

            expect(merge_request.reload.metrics.first_deployed_to_production_at).to be_like_time(deployment.finished_at)

            # Current deploy
            travel_to(12.hours.from_now) do
              service.execute

              expect(merge_request.reload.metrics.first_deployed_to_production_at).to be_like_time(deployment.finished_at)
            end
          end
        end

        context "if the 'first_deployed_to_production_at' time is not already set" do
          it "does not overwrite the older 'first_deployed_to_production_at' time" do
            # Previous deploy
            time = 5.minutes.from_now
            travel_to(time) { service.execute }

            expect(merge_request.reload.metrics.merged_at).to be < merge_request.reload.metrics.first_deployed_to_production_at

            previous_time = merge_request.reload.metrics.first_deployed_to_production_at

            # Current deploy
            travel_to(time + 12.hours) { service.execute }

            expect(merge_request.reload.metrics.first_deployed_to_production_at).to eq(previous_time)
          end
        end
      end
    end
  end
end
