#!/usr/bin/env ruby

require 'open-uri'
require 'json'
require 'distance'

HOSTNAME = IO::readlines("/proc/sys/kernel/hostname").join.chomp
INTERVAL = 1
POS = [ 51.08102, 13.72806 ]

loop do
  planes = JSON.parse URI.open("http://localhost:8080/data.json").read

  planes.each do |plane|
    flight = plane["flight"].strip
    next if flight.empty?

    alt = plane["altitude"].to_i
    speed = plane["speed"].to_i
    dist = GIS::Distance::new(POS[0], POS[1], plane["lat"].to_f, plane["lon"].to_f).distance
    puts "PUTVAL \"#{HOSTNAME}/dump1090-altitude/current-#{flight}\" interval=#{INTERVAL} N:#{alt}"
    puts "PUTVAL \"#{HOSTNAME}/dump1090-speed/current-#{flight}\" interval=#{INTERVAL} N:#{speed}"
    puts "PUTVAL \"#{HOSTNAME}/dump1090-distance/current-#{flight}\" interval=#{INTERVAL} N:#{dist}"
  end

rescue
  STDERR.puts $!

ensure
  sleep INTERVAL

end