#!/usr/bin/env ruby

require 'randomua'
require 'docopt'

doc = <<~DOCOPT
  randomua (random user agent) | Generate a random user agent string.

  Usage:
    randomua [options]
    randomua -h | --help
    randomua --version

  Options:
    -c, --crawler            Gereate a random crawler user agent string
    -d, --desktop-browser    Gereate a random desktop browser user agent string
    -m, --mobile-browser     Gereate a random mobile browser user agent string
    -o, --console            Gereate a random console user agent string
    -f, --offline-browser    Gereate a random offline browser user agent string
    -e, --email-client       Gereate a random email client user agent string
    -l, --link-checker       Gereate a random link checker user agent string
    -a, --email-collector    Gereate a random email collector user agent string
    -v, --validator          Gereate a random validator user agent string
    -r, --feed-reader        Gereate a random feed reader user agent string
    -i, --library            Gereate a random library user agent string
    -u, --cloud-platform     Gereate a random cloud platform user agent string
    -t, --other              Gereate a random other user agent string
    -s, --version            Print version and exit
    -h, --help               Show this message

  Examples:
    randomua -d
DOCOPT

begin
  args = Docopt.docopt(doc, version: Randomua::VERSION)
  # use case 1, using the tool
  if args.empty?
    puts UserAgentRandomizer::UserAgent.fetch.string
  else
    type = 'crawler'         if args['--crawler']
    type = 'desktop_browser' if args['--desktop-browser']
    type = 'mobile_browser'  if args['--mobile-browser']
    type = 'console'         if args['--console']
    type = 'offline_browser' if args['--offline-browser']
    type = 'email_client'    if args['--email-client']
    type = 'link_checker'    if args['--link-checker']
    type = 'email_collector' if args['--email-collector']
    type = 'validator'       if args['--validator']
    type = 'feed_reader'     if args['--feed-reader']
    type = 'library'         if args['--library']
    type = 'cloud_platform'  if args['--cloud-platform']
    type = 'other'           if args['--other']
    puts UserAgentRandomizer::UserAgent.fetch(type: type).string
  end
  # use case 2, help: already handled by docopt
  # use case 3, version: already handled by docopt
rescue Docopt::Exit => e
  puts e.message
end