class Geocoder::Lookup::AmazonLocationService

def client
  return @client if @client
  require_sdk
  keys = configuration.api_key
  if keys
    @client = Aws::LocationService::Client.new(**{
      region: keys[:region],
      access_key_id: keys[:access_key_id],
      secret_access_key: keys[:secret_access_key]
    }.compact)
  else
    @client = Aws::LocationService::Client.new
  end
end

def require_sdk
  begin
    require 'aws-sdk-locationservice'
  rescue LoadError
    raise_error(Geocoder::ConfigurationError) ||
      Geocoder.log(
        :error,
        "Couldn't load the Amazon Location Service SDK. " +
        "Install it with: gem install aws-sdk-locationservice -v '~> 1.4'"
      )
  end
end

def results(query)
  params = query.options.dup
  # index_name is required
  # Aws::ParamValidator raises ArgumentError on missing required keys
  params.merge!(index_name: configuration[:index_name])
  # Aws::ParamValidator raises ArgumentError on unexpected keys
  params.delete(:lookup) 
  
  resp = if query.reverse_geocode?
    client.search_place_index_for_position(params.merge(position: query.coordinates.reverse))
  else
    client.search_place_index_for_text(params.merge(text: query.text))
  end
  
  resp.results.map(&:place)
end