# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Mutations::Releases::Update do
  let_it_be(:project) { create(:project, :public, :repository) }
  let_it_be(:milestone_12_3) { create(:milestone, project: project, title: '12.3') }
  let_it_be(:milestone_12_4) { create(:milestone, project: project, title: '12.4') }
  let_it_be(:reporter) { create(:user) }
  let_it_be(:developer) { create(:user) }

  let_it_be(:tag) { 'v1.1.0' }
  let_it_be(:name) { 'Version 1.0' }
  let_it_be(:description) { 'The first release :rocket:' }
  let_it_be(:released_at) { Time.parse('2018-12-10').utc }
  let_it_be(:created_at) { Time.parse('2018-11-05').utc }
  let_it_be(:milestones) { [milestone_12_3.title, milestone_12_4.title] }

  let_it_be(:release) do
    create(:release, project: project, tag: tag, name: name,
                     description: description, released_at: released_at,
                     created_at: created_at, milestones: [milestone_12_3, milestone_12_4])
  end

  let(:mutation) { described_class.new(object: nil, context: { current_user: current_user }, field: nil) }

  let(:mutation_arguments) do
    {
      project_path: project.full_path,
      tag: tag
    }
  end

  around do |example|
    freeze_time { example.run }
  end

  before do
    project.add_reporter(reporter)
    project.add_developer(developer)
  end

  shared_examples 'no changes to the release except for the' do |except_for|
    it 'does not change other release properties' do
      expect(updated_release.project).to eq(project)
      expect(updated_release.tag).to eq(tag)

      expect(updated_release.name).to eq(name) unless except_for == :name
      expect(updated_release.description).to eq(description) unless except_for == :description
      expect(updated_release.released_at).to eq(released_at) unless except_for == :released_at
      expect(updated_release.milestones.order_by_dates_and_title).to eq([milestone_12_3, milestone_12_4]) unless except_for == :milestones
    end
  end

  shared_examples 'validation error with message' do |message|
    it 'returns the updated release as nil' do
      expect(updated_release).to be_nil
    end

    it 'returns a validation error' do
      expect(subject[:errors]).to eq([message])
    end
  end

  describe '#ready?' do
    let(:current_user) { developer }

    subject(:ready) do
      mutation.ready?(**mutation_arguments)
    end

    context 'when released_at is included as an argument but is passed nil' do
      let(:mutation_arguments) { super().merge(released_at: nil) }

      it 'raises a validation error' do
        expect { subject }.to raise_error(Gitlab::Graphql::Errors::ArgumentError, 'if the releasedAt argument is provided, it cannot be null')
      end
    end

    context 'when milestones is included as an argument but is passed nil' do
      let(:mutation_arguments) { super().merge(milestones: nil) }

      it 'raises a validation error' do
        expect { subject }.to raise_error(Gitlab::Graphql::Errors::ArgumentError, 'if the milestones argument is provided, it cannot be null')
      end
    end
  end

  describe '#resolve' do
    subject(:resolve) do
      mutation.resolve(**mutation_arguments)
    end

    let(:updated_release) { subject[:release] }

    context 'when the current user has access to create releases' do
      let(:current_user) { developer }

      context 'name' do
        let(:mutation_arguments) { super().merge(name: updated_name) }

        context 'when a new name is provided' do
          let(:updated_name) { 'Updated name' }

          it 'updates the name' do
            expect(updated_release.name).to eq(updated_name)
          end

          it_behaves_like 'no changes to the release except for the', :name

          context 'with protected tag' do
            context 'when user has access to the protected tag' do
              let!(:protected_tag) { create(:protected_tag, :developers_can_create, name: '*', project: project) }

              it 'does not have errors' do
                subject

                expect(resolve).to include(errors: [])
              end
            end

            context 'when user does not have access to the protected tag' do
              let!(:protected_tag) { create(:protected_tag, :maintainers_can_create, name: '*', project: project) }

              it 'has an access error' do
                subject

                expect(resolve).to include(errors: ['Access Denied'])
              end
            end
          end
        end

        context 'when nil is provided' do
          let(:updated_name) { nil }

          it 'updates the name to be the tag name' do
            expect(updated_release.name).to eq(tag)
          end

          it_behaves_like 'no changes to the release except for the', :name
        end
      end

      context 'description' do
        let(:mutation_arguments) { super().merge(description: updated_description) }

        context 'when a new description is provided' do
          let(:updated_description) { 'Updated description' }

          it 'updates the description' do
            expect(updated_release.description).to eq(updated_description)
          end

          it_behaves_like 'no changes to the release except for the', :description
        end

        context 'when nil is provided' do
          let(:updated_description) { nil }

          it 'updates the description to nil' do
            expect(updated_release.description).to eq(nil)
          end

          it_behaves_like 'no changes to the release except for the', :description
        end
      end

      context 'released_at' do
        let(:mutation_arguments) { super().merge(released_at: updated_released_at) }

        context 'when a new released_at is provided' do
          let(:updated_released_at) { Time.parse('2020-12-10').utc }

          it 'updates the released_at' do
            expect(updated_release.released_at).to eq(updated_released_at)
          end

          it_behaves_like 'no changes to the release except for the', :released_at
        end
      end

      context 'milestones' do
        let(:mutation_arguments) { super().merge(milestones: updated_milestones) }

        context 'when a new set of milestones is provided provided' do
          let(:updated_milestones) { [milestone_12_3.title] }

          it 'updates the milestone associations' do
            expect(updated_release.milestones).to eq([milestone_12_3])
          end

          it_behaves_like 'no changes to the release except for the', :milestones
        end

        context 'when an empty array is provided' do
          let(:updated_milestones) { [] }

          it 'removes all milestone associations' do
            expect(updated_release.milestones).to eq([])
          end

          it_behaves_like 'no changes to the release except for the', :milestones
        end

        context 'when a non-existent milestone title is provided' do
          let(:updated_milestones) { ['not real'] }

          it_behaves_like 'validation error with message', 'Milestone(s) not found: not real'
        end

        context 'when a milestone title from a different project is provided' do
          let(:milestone_in_different_project) { create(:milestone, title: 'milestone in different project') }
          let(:updated_milestones) { [milestone_in_different_project.title] }

          it_behaves_like 'validation error with message', 'Milestone(s) not found: milestone in different project'
        end
      end

      context 'validation' do
        context 'when no updated fields are provided' do
          it_behaves_like 'validation error with message', 'params is empty'
        end

        context 'when the tag does not exist' do
          let(:mutation_arguments) { super().merge(tag: 'not-a-real-tag') }

          it_behaves_like 'validation error with message', 'Tag does not exist'
        end

        context 'when the project does not exist' do
          let(:mutation_arguments) { super().merge(project_path: 'not/a/real/path') }

          it 'raises an error' do
            expect { subject }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable, Gitlab::Graphql::Authorize::AuthorizeResource::RESOURCE_ACCESS_ERROR)
          end
        end
      end
    end

    context "when the current user doesn't have access to update releases" do
      let(:current_user) { reporter }

      it 'raises an error' do
        expect { subject }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable, Gitlab::Graphql::Authorize::AuthorizeResource::RESOURCE_ACCESS_ERROR)
      end
    end
  end
end