#!/usr/bin/env ruby

root = File.expand_path(File.join(File.dirname(__FILE__),'..'))
if File.directory?(File.join(root,'.git'))
  Dir.chdir(root) do
    begin
      require 'bundler/setup'
    rescue LoadError => e
      warn e.message
      warn "Run `gem install bundler` to install Bundler"
      exit -1
    end
  end
end

require 'whatmask'

if ARGV.empty?
  puts('')
  puts('whatmask comes with ABSOLUTELY NO WARRANTY; for details see the COPYING file')
  puts('that accompained this distribution. This is free software, and you are welcome')
  puts('to redistribute it under the terms of GNU PUBLIC LICENSE.')
  puts('')
  puts('whatmask may be used two ways:')
  puts('')
  puts('Given a mask:          whatmask <CIDR bits>')
  puts('               - or -  whatmask <subnet mask>')
  puts('               - or -  whatmask <hex subnet mask>')
  puts('               - or -  whatmask <wildcard bit mask>')
  puts(' NOTE: whatmask will autodetect the input and show you all four.')
  puts('')
  puts('Given an ip/mask:      whatmask <IP address>/<netmask>')
  puts('       <netmask> may be one of the following:')
  puts('                       CIDR notation (e.g. "24")')
  puts('                       Netmask notation (e.g. "255.255.255.0")')
  puts('                       Hex Netmask notation (e.g. "0xffffff00")')
  puts('                       Wildcard bits notation (e.g. "0.0.0.255")')
  puts(' NOTE: whatmask will autodetect the netmask format.')
  puts('')
  exit
end

if ARGV[0][0] == "/"
  wm = Whatmask.new(ARGV[0][1..-1])
  puts ''
  puts '---------------------------------------------'
  puts '       TCP/IP SUBNET MASK EQUIVALENTS'
  puts '---------------------------------------------'
  puts 'CIDR = .....................: /'+wm.cidr.to_s
  puts 'Netmask = ..................: '+wm.mask
  puts 'Netmask (hex) = ............: '+wm.hex
  puts 'Wildcard Bits = ............: '+wm.inverse
  puts 'Usable IP Addresses = ......: '+wm.avail.to_s
  puts ''

elsif ARGV[0] == "-v"
  puts Whatmask::VERSION

elsif ARGV[0].include? "/"
  wm = Whatmask.new(ARGV[0].split('/')[1], ARGV[0].split('/')[0])
  puts ''
  puts '------------------------------------------------'
  puts '           TCP/IP NETWORK INFORMATION'
  puts '------------------------------------------------'
  puts 'IP Entered = ..................: '+wm.address
  puts 'CIDR = ........................: /'+wm.cidr.to_s
  puts 'Netmask = .....................: '+wm.mask
  puts 'Netmask (hex) = ...............: '+wm.hex
  puts 'Wildcard Bits = ...............: '+wm.inverse
  puts '------------------------------------------------'
  puts 'Network Address = .............: '+wm.network
  puts 'Broadcast Address = ...........: '+wm.broadcast
  puts 'Usable IP Addresses = .........: '+wm.avail.to_s
  puts 'First Usable IP Address = .....: '+wm.first
  puts 'Last Usable IP Address = ......: '+wm.last
  puts ''

elsif ARGV.length < 2
  wm = Whatmask.new(ARGV[0])
  puts ''
  puts '---------------------------------------------'
  puts '       TCP/IP SUBNET MASK EQUIVALENTS'
  puts '---------------------------------------------'
  puts 'CIDR = .....................: /'+wm.cidr.to_s
  puts 'Netmask = ..................: '+wm.mask
  puts 'Netmask (hex) = ............: '+wm.hex
  puts 'Wildcard Bits = ............: '+wm.inverse
  puts 'Usable IP Addresses = ......: '+wm.avail.to_s
  puts ''

else
  wm = Whatmask.new(ARGV[1], ARGV[0])
  puts ''
  puts '------------------------------------------------'
  puts '           TCP/IP NETWORK INFORMATION'
  puts '------------------------------------------------'
  puts 'IP Entered = ..................: '+wm.address
  puts 'CIDR = ........................: /'+wm.cidr.to_s
  puts 'Netmask = .....................: '+wm.mask
  puts 'Netmask (hex) = ...............: '+wm.hex
  puts 'Wildcard Bits = ...............: '+wm.inverse
  puts '------------------------------------------------'
  puts 'Network Address = .............: '+wm.network
  puts 'Broadcast Address = ...........: '+wm.broadcast
  puts 'Usable IP Addresses = .........: '+wm.avail.to_s
  puts 'First Usable IP Address = .....: '+wm.first
  puts 'Last Usable IP Address = ......: '+wm.last
  puts ''
end