require 'open3'
require 'os'
require 'tty-command'
require 'tty-file'
require 'tty-prompt'

# cmd    = TTY::Command.new
prompt = TTY::Prompt.new(help_color: :magenta)

@home       = File.expand_path('~')
@dotroot    = File.dirname(File.dirname(File.expand_path($PROGRAM_NAME)))
@excludes   = %w[mac nix]
@files_copy = Dir.glob("#{@dotroot}/copy/*")
@files_link = Dir.glob("#{@dotroot}/link/*")

if OS.mac?
  stdout, _stderr, _status = Open3.capture3('sw_vers -productVersion')
  if Integer(stdout.strip.split('.')[0]) == 10
    if Integer(stdout.strip.split('.')[1]) >= 12
      puts "It seems you are on macOS #{stdout.strip}"
    else
      puts "It seems you are on OX X #{stdout.strip}"
    end

  elsif Integer(stdout.strip.split('.')[0]) < 10
    puts "Wow... you're sure running an old os (#{stdout.strip} to be exact)"
  else
    abort("It seems you are on a Mac but I don't know what to do on \
      v#{stdout.strip}")
  end

  @files_copy.concat Dir.glob("#{@dotroot}/copy/mac/*")
  @files_link.concat Dir.glob("#{@dotroot}/link/mac/*")

elsif OS.liux?
  puts 'It seems you are on Linux'
  @files_copy.concat Dir.glob("#{@dotroot}/copy/nix/*")
  @files_link.concat Dir.glob("#{@dotroot}/link/nix/*")

elsif OS.windows?
  puts 'It seems you are on Windows'

else
  abort("I'm not sure what to do with this OS...")
end

task = prompt.select('What would you like to do?', %w[copy link])
case task
when 'copy'
  if prompt.yes?('Are you sure you want to copy these files?')
    @files_copy.each do |file|
      unless @excludes.include?(File.basename(file))
        puts "Copying #{file} to #{@home}/.#{File.basename(file)}"
      end
    end
  else
    puts 'not copying'
  end

when 'link'
  if prompt.yes?('Shall we continue?')
    @files_link.each do |file|
      unless @excludes.include?(File.basename(file))
        puts "Linking #{@home}/.#{File.basename(file)} to #{file}"
      end
    end
  else
    puts 'no linking'
  end
end