#!/opt/puppetlabs/puppet/bin/ruby
# frozen_string_literal: true

require 'json'
require 'open3'
require 'puppet'

def service_scale(service, scale, detach)
  cmd_string = 'docker service scale'
  cmd_string += " #{service}" unless service.nil?
  cmd_string += "=#{scale}" unless scale.nil?
  cmd_string += ' -d' unless detach.nil?

  stdout, stderr, status = Open3.capture3(cmd_string)
  raise Puppet::Error, "stderr: '#{stderr}'" if status != 0

  stdout.strip
end

params = JSON.parse($stdin.read)
service = params['service']
scale = params['scale']
detach = params['detach']

begin
  result = service_scale(service, scale, detach)
  puts result
  exit 0
rescue Puppet::Error => e
  puts(status: 'failure', error: e.message)
  exit 1
end