# typed: true

module Packs
  module Rails
    class Stim < Module
      extend T::Sig

      sig { params(pack: Packs::Pack, namespace: Module).void }
      def initialize(pack, namespace)
        @pack = pack
        @namespace = namespace
        super()
      end

      def included(engine)
        engine.called_from = @pack.relative_path
        engine.extend(ClassMethods)
        engine.isolate_namespace(@namespace)

        # Set all of these paths to nil because we want the Rails integration to take
        # care of them. The purpose of this Engine is really just for the namespace
        # isolation.
        (Packs::Rails.config.paths +
          # In addition to the paths we've delegated to the main app, we don't allow
          # Engine Packs to have various capabilities.
          %w(
            config/environments
            db/migrate
          )
        ).uniq.each do |path|
          engine.paths[path] = nil
        end
      end

      module ClassMethods
        def find_root(_from)
          T.unsafe(self).called_from
        end
      end
    end
  end
end