#!/usr/bin/env ruby

require 'rubygems'
require "wx"

class MinimalApp < Wx::App
  def initialize(time)
    @time = time
    super()
  end

  def on_init
    Wx::Timer.every(@time*60*1000) do
      @frame.set_background_colour Wx::GREEN
    end

    size = Wx::get_display_size
    size.set_height(size.get_height - 45)

    title = Time.now.strftime("%H:%M:%S")
    title += ' - '
    title += (Time.now + @time*60).strftime("%H:%M:%S")
    title += ' ('
    title += @time.to_s
    title += ' minutes)'

    @frame = Wx::Frame.new(nil, -1, title, Wx::Point.new(0, 0), size)
    @frame.set_background_colour Wx::BLACK
    @frame.show
  end
end

MinimalApp.new((ARGV.first || 3).to_i).main_loop