class Grape::ErrorFormatter::Base

def call(message, backtrace, options = {}, env = nil, original_exception = nil)
  merge_backtrace = backtrace.present? && options.dig(:rescue_options, :backtrace)
  merge_original_exception = original_exception && options.dig(:rescue_options, :original_exception)
  wrapped_message = wrap_message(present(message, env))
  if wrapped_message.is_a?(Hash)
    wrapped_message[:backtrace] = backtrace if merge_backtrace
    wrapped_message[:original_exception] = original_exception.inspect if merge_original_exception
  end
  format_structured_message(wrapped_message)
end

def format_structured_message(_structured_message)
  raise NotImplementedError
end

def inherited(klass)
  super
  ErrorFormatter.register(klass)
end

def present(message, env)
  present_options = {}
  presented_message = message
  if presented_message.is_a?(Hash)
    presented_message = presented_message.dup
    present_options[:with] = presented_message.delete(:with)
  end
  presenter = env[Grape::Env::API_ENDPOINT].entity_class_for_obj(presented_message, present_options)
  unless presenter || env[Grape::Env::GRAPE_ROUTING_ARGS].nil?
    # env['api.endpoint'].route does not work when the error occurs within a middleware
    # the Endpoint does not have a valid env at this moment
    http_codes = env[Grape::Env::GRAPE_ROUTING_ARGS][:route_info].http_codes || []
    found_code = http_codes.find do |http_code|
      (http_code[0].to_i == env[Grape::Env::API_ENDPOINT].status) && http_code[2].respond_to?(:represent)
    end if env[Grape::Env::API_ENDPOINT].request
    presenter = found_code[2] if found_code
  end
  if presenter
    embeds = { env: env }
    embeds[:version] = env[Grape::Env::API_VERSION] if env.key?(Grape::Env::API_VERSION)
    presented_message = presenter.represent(presented_message, embeds).serializable_hash
  end
  presented_message
end

def wrap_message(message)
  return message if message.is_a?(Hash)
  { message: message }
end