# frozen_string_literal: true

module Projects
  class UpdateService < BaseService
    include UpdateVisibilityLevel

    ValidationError = Class.new(StandardError)

    # rubocop: disable CodeReuse/ActiveRecord
    def execute
      validate!

      ensure_wiki_exists if enabling_wiki?

      yield if block_given?

      # If the block added errors, don't try to save the project
      return update_failed! if project.errors.any?

      if project.update(params.except(:default_branch))
        after_update

        success
      else
        update_failed!
      end
    rescue ValidationError => e
      error(e.message)
    end
    # rubocop: enable CodeReuse/ActiveRecord

    def run_auto_devops_pipeline?
      return false if project.repository.gitlab_ci_yml || !project.auto_devops&.previous_changes&.include?('enabled')

      project.auto_devops_enabled?
    end

    private

    def validate!
      unless valid_visibility_level_change?(project, params[:visibility_level])
        raise ValidationError.new('New visibility level not allowed!')
      end

      if renaming_project_with_container_registry_tags?
        raise ValidationError.new('Cannot rename project because it contains container registry tags!')
      end

      if changing_default_branch?
        raise ValidationError.new("Could not set the default branch") unless project.change_head(params[:default_branch])
      end
    end

    def after_update
      todos_features_changes = %w(
        issues_access_level
        merge_requests_access_level
        repository_access_level
      )
      project_changed_feature_keys = project.project_feature.previous_changes.keys

      if project.previous_changes.include?(:visibility_level) && project.private?
        # don't enqueue immediately to prevent todos removal in case of a mistake
        TodosDestroyer::ProjectPrivateWorker.perform_in(Todo::WAIT_FOR_DELETE, project.id)
      elsif (project_changed_feature_keys & todos_features_changes).present?
        TodosDestroyer::PrivateFeaturesWorker.perform_in(Todo::WAIT_FOR_DELETE, project.id)
      end

      if project.previous_changes.include?('path')
        after_rename_service(project).execute
      else
        system_hook_service.execute_hooks_for(project, :update)
      end

      update_pages_config if changing_pages_related_config?
    end

    def after_rename_service(project)
      AfterRenameService.new(project)
    end

    def changing_pages_related_config?
      changing_pages_https_only? || changing_pages_access_level?
    end

    def update_failed!
      model_errors = project.errors.full_messages.to_sentence
      error_message = model_errors.presence || 'Project could not be updated!'

      error(error_message)
    end

    def renaming_project_with_container_registry_tags?
      new_path = params[:path]

      new_path && new_path != project.path &&
        project.has_container_registry_tags?
    end

    def changing_default_branch?
      new_branch = params[:default_branch]

      new_branch && project.repository.exists? &&
        new_branch != project.default_branch
    end

    def enabling_wiki?
      return false if project.wiki_enabled?

      params.dig(:project_feature_attributes, :wiki_access_level).to_i > ProjectFeature::DISABLED
    end

    def changing_pages_access_level?
      params.dig(:project_feature_attributes, :pages_access_level)
    end

    def ensure_wiki_exists
      ProjectWiki.new(project, project.owner).wiki
    rescue ProjectWiki::CouldNotCreateWikiError
      log_error("Could not create wiki for #{project.full_name}")
      Gitlab::Metrics.counter(:wiki_can_not_be_created_total, 'Counts the times we failed to create a wiki')
    end

    def update_pages_config
      Projects::UpdatePagesConfigurationService.new(project).execute
    end

    def changing_pages_https_only?
      project.previous_changes.include?(:pages_https_only)
    end
  end
end