# frozen_string_literal: true

module GraphQLHelpers
  # makes snake_case_field_name look like a graphql camelCaseFieldName
  # "many_pokemon" => "manyPokemon"
  def self.fieldnamerize(underscored_field_name)
    graphql_field_name = underscored_field_name.to_s.camelize
    graphql_field_name[0] = graphql_field_name[0].downcase

    graphql_field_name
  end

  def self.keys_for_klass(klass)
    case klass
    when GraphQL::Field
      klass.type
    else
      klass
    end.fields.keys
  end

  def self.arguments_for_field(field)
    case field
    when GraphQL::Schema::Resolver
      field.instance_variable_get('@arguments_by_keyword').map { |_, v| v.name }
    else
      field.arguments.keys
    end
  end

  # Shortcut for running resolvers #resolve methods
  def resolve(resolver_class, obj: nil, args: {}, ctx: {})
    resolver_class.new(object: obj, context: ctx).resolve(args)
  end
end