#!/usr/bin/env ruby

require 'json'
require 'rest_client'

protocol = ARGV[0]
jsonurl = ARGV[1]

data = JSON::parse(RestClient.get(jsonurl))

if data["version"] != 3
	print "Data format version != 3"
	exit 1
end

urls = data["urls"]
rsync_urls = urls.select{|a| a["protocol"]==protocol}

# By score ( (delay+speed)/completion )
#best = rsync_urls.sort{|a,b| (a["score"] || Float::INFINITY) <=> (b["score"] || Float::INFINITY) }.first
# By delay/completion
best = rsync_urls.sort{|a,b| a["delay"]/a["completion_pct"] <=> b["delay"]/b["completion_pct"] }.first

puts best["url"]