module Grape::Middleware::Auth::DSL

def auth(type = nil, *legacy_options, **options, &block)
  namespace_inheritable = inheritable_setting.namespace_inheritable
  return namespace_inheritable[:auth] unless type
  options = merge_legacy_auth_options(:auth, legacy_options, options)
  namespace_inheritable[:auth] = { type: type.to_sym, proc: block }.merge!(options)
  use Grape::Middleware::Auth::Base, namespace_inheritable[:auth]
end

def http_basic(*legacy_options, **options, &)
  options = merge_legacy_auth_options(:http_basic, legacy_options, options)
  options[:realm] ||= 'API Authorization'
  auth(:http_basic, **options, &)
end

def http_digest(*legacy_options, **options, &)
  options = merge_legacy_auth_options(:http_digest, legacy_options, options)
  options[:realm] ||= 'API Authorization'
  if options[:realm].respond_to?(:values_at)
    options[:realm][:opaque] ||= 'secret'
  else
    options[:opaque] ||= 'secret'
  end
  auth(:http_digest, **options, &)
end

def merge_legacy_auth_options(method_name, legacy_options, options)
  return options if legacy_options.empty?
  Grape.deprecator.warn("Passing a positional options Hash to `#{method_name}` is deprecated. Pass keyword arguments instead.")
  legacy_options.first.merge(options)
end