module Hanami
  module Boot
    module SourceDirs
      def self.setup_component_dir!(component_dir, slice, container)
        # TODO: this `== "lib"` check should be codified into a method somewhere
        if component_dir.path == "lib"
          # Expect component files in the root of the lib
          # component dir to define classes inside the slice's namespace.
          #
          # e.g. "lib/foo.rb" should define SliceNamespace::Foo, and will be
          # registered as "foo"
          component_dir.namespaces.root(key: nil, const: slice.namespace_path)

          slice.application.autoloader.push_dir(slice.root.join("lib"), namespace: slice.namespace)

          container.config.component_dirs.add(component_dir)
        else
          # Expect component files in the root of these component dirs to define
          # classes inside a namespace matching the dir.
          #
          # e.g. "actions/foo.rb" should define SliceNamespace::Actions::Foo, and
          # will be registered as "actions.foo"

          dir_namespace_path = File.join(slice.namespace_path, component_dir.path)

          autoloader_namespace = begin
            slice.inflector.constantize(slice.inflector.camelize(dir_namespace_path))
          rescue NameError
            slice.namespace.const_set(slice.inflector.camelize(component_dir.path), Module.new)
          end

          # TODO: do we need to do something special to clear out any previously configured root namespace here?
          component_dir.namespaces.root(const: dir_namespace_path, key: component_dir.path) # TODO: do we need to swap path delimiters for key delimiters here?
          container.config.component_dirs.add(component_dir)

          slice.application.autoloader.push_dir(
            slice.root.join(component_dir.path),
            namespace: autoloader_namespace
          )
        end
      end
    end
  end
end