class Geocoder::Lookup::MaxmindGeoip2

def configured_service!
  if s = configuration[:service] and services.include?(s) and configuration[:basic_auth][:user] and configuration[:basic_auth][:password]
    return s
  else
    raise(
      Geocoder::ConfigurationError,
      "When using MaxMind GeoIP2 you MUST specify a service name and basic_auth: " +
      "Geocoder.configure(:maxmind_geoip2 => {:service => ...}, " +
      ":basic_auth => {:user ..., :password => ...}), " +
      "where service is one of: #{services.inspect}"
    )
  end
end

def data_contains_error?(doc)
  (["code", "error"] - doc.keys).empty?
end

def name
  "MaxMind GeoIP2"
end

def query_url(query)
  "#{protocol}://geoip.maxmind.com/geoip/v2.1/#{configured_service!}/#{query.sanitized_text.strip}"
end

def results(query)
  # don't look up a loopback address
  return [] if query.loopback_ip_address?
  doc = fetch_data(query)
  if doc
    if !data_contains_error?(doc)
      return [doc]
    else
      Geocoder.log(:warn, "MaxMind GeoIP2 Geocoding API error: #{doc['code']} (#{doc['error']}).")
    end
  end
  return []
end

def services
  [
    :country,
    :city,
    :insights,
  ]
end

def supported_protocols
  [:https]
end