class Geocoder::Cli

def self.run(args, out = STDOUT)
  show_url  = false
  show_json = false
  # remove arguments that are probably coordinates so they are not
  # processed as arguments (eg: -31.96047031,115.84274631)
  coords = args.select{ |i| i.match(/^-\d/) }
  args -= coords
  OptionParser.new{ |opts|
    opts.banner = "Usage:\n    geocode [options] <location>"
    opts.separator "\nOptions: "
    opts.on("-k <key>", "--key <key>",
      "Key for geocoding API (usually optional). Enclose multi-part keys in quotes and separate parts by spaces") do |key|
      if (key_parts = key.split(/\s+/)).size > 1
        Geocoder.configure(:api_key => key_parts)
      else
        Geocoder.configure(:api_key => key)
      end
    end
    opts.on("-l <language>", "--language <language>",
      "Language of output (see API docs for valid choices)") do |language|
      Geocoder.configure(:language => language)
    end
    opts.on("-p <proxy>", "--proxy <proxy>",
      "HTTP proxy server to use (user:pass@host:port)") do |proxy|
      Geocoder.configure(:http_proxy => proxy)
    end
    opts.on("-s <service>", Geocoder::Lookup.all_services_except_test, "--service <service>",
      "Geocoding service: #{Geocoder::Lookup.all_services_except_test * ', '}") do |service|
      Geocoder.configure(:lookup => service.to_sym)
      Geocoder.configure(:ip_lookup => service.to_sym)
    end
    opts.on("-t <seconds>", "--timeout <seconds>",
      "Maximum number of seconds to wait for API response") do |timeout|
      Geocoder.configure(:timeout => timeout.to_i)
    end
    opts.on("-j", "--json", "Print API's raw JSON response") do
      show_json = true
    end
    opts.on("-u", "--url", "Print URL for API query instead of result") do
      show_url = true
    end
    opts.on_tail("-v", "--version", "Print version number") do
      require "geocoder/version"
      out << "Geocoder #{Geocoder::VERSION}\n"
      exit
    end
    opts.on_tail("-h", "--help", "Print this help") do
      out << "Look up geographic information about a location.\n\n"
      out << opts
      out << "\nCreated and maintained by Alex Reisner, available under the MIT License.\n"
      out << "Report bugs and contribute at http://github.com/alexreisner/geocoder\n"
      exit
    end
  }.parse!(args)
  # concatenate args with coords that might have been removed
  # before option processing
  query = (args + coords).join(" ")
  if query == ""
    out << "Please specify a location (run `geocode -h` for more info).\n"
    exit 1
  end
  if show_url and show_json
    out << "You can only specify one of -j and -u.\n"
    exit 2
  end
  if show_url
    q = Geocoder::Query.new(query)
    out << q.url + "\n"
    exit 0
  end
  if show_json
    q = Geocoder::Query.new(query)
    out << q.lookup.send(:fetch_raw_data, q) + "\n"
    exit 0
  end
  if (result = Geocoder.search(query).first)
    nominatim = Geocoder::Lookup.get(:nominatim)
    lines = [
      ["Latitude",       result.latitude],
      ["Longitude",      result.longitude],
      ["Full address",   result.address],
      ["City",           result.city],
      ["State/province", result.state],
      ["Postal code",    result.postal_code],
      ["Country",        result.country],
      ["Map",            nominatim.map_link_url(result.coordinates)],
    ]
    lines.each do |line|
      out << (line[0] + ": ").ljust(18) + line[1].to_s + "\n"
    end
    exit 0
  else
    out << "Location '#{query}' not found.\n"
    exit 1
  end
end