#!/usr/bin/ruby.ruby3.4 
# Copyright 2010-2018 The NATS Authors
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require 'optparse'
require 'rubygems'
require 'nats/client'

def usage
  puts "Usage: nats-pub <subject> <msg> [-s server] [--creds CREDS]"; exit
end

args = ARGV.dup
opts_parser = OptionParser.new do |opts|
  opts.on('-s SERVER') { |server| $nats_server = server }
  opts.on('--creds CREDS') { |creds| $creds = creds }
end
args = opts_parser.parse!(args)

subject, msg = args
usage unless subject
msg ||= 'Hello World'

NATS.on_error { |err| puts "Server Error: #{err}"; exit! }

NATS.start($nats_server, user_credentials: $creds) do
  NATS.publish(subject, msg) { NATS.stop }
end

puts "Published [#{subject}] : '#{msg}'"
