#!/usr/bin/env ruby
# frozen_string_literal: true

# Ruby internal
require 'pp'
# Project internal
require 'haiti'
# External
require 'docopt'
require 'paint'

doc = <<~DOCOPT
  HAITI (HAsh IdenTifIer) v#{HashIdentifier::VERSION}

  Usage:
    haiti [options] <hash>
    haiti samples (<ref> | <name>)
    haiti -h | --help
    haiti --version

  Commands:
    samples         Display hash samples for the given type

  Parameters:
    <hash>          Hash string to identify, read from STDIN if equal to "-"
    <ref>           hashcat or john the ripper reference
    <name>          Hash type name

  Options:
    --no-color      Disable colorized output
    -e, --extended  List all possible hash algorithms including ones using salt
    --short         Display in a short format: do not display hashcat and john the ripper references
    --hashcat-only  Show only hashcat references
    --john-only     Show only john the ripper references
    --debug         Display arguments
    -h, --help      Show this screen
    --version       Show version

  Examples:
    haiti -e d41d8cd98f00b204e9800998ecf8427e
    haiti --no-color --short d41d8cd98f00b204e9800998ecf8427e
    b2sum /etc/os-release | awk '{print $1}' | haiti -
    haiti samples crc32
DOCOPT

begin
  args = Docopt.docopt(doc, version: HashIdentifier::VERSION)
  Paint.mode = 0 if args['--no-color']
  pp args if args['--debug']
  # use case 1, using the tool
  if args['<hash>']
    args['<hash>'] = $stdin.read.chomp if args['<hash>'] == '-'
    hi = HashIdentifier.new(args['<hash>'])
    if hi.type.empty?
      puts 'Unknown hash type'
      exit(0)
    end
    hi.type.each do |type|
      next if type.extended && !args['--extended']

      print Paint[type.name, :bold]
      print Paint[" [HC: #{type.hashcat}]", :blue] unless type.hashcat.nil? || args['--short'] || args['--john-only']
      print Paint[" [JtR: #{type.john}]", :green] unless type.john.nil? || args['--short'] || args['--hashcat-only']
      puts
    end
  elsif args['samples']
    input = args['<ref>'] || args['<name>']
    samples = HashIdentifier.samples(input)
    samples.each do |sample|
      puts sample
    end
  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