FIFO = File.expand_path('~/.osd')

`mkfifo "#{FIFO}"` unless test(?e, FIFO)

require 'optparse'
require 'ostruct'
require 'xosd_scroll'

def parse(args)
  options = OpenStruct.new
  options.pos = XOSD::TOP
  options.offset = 50
  options.align = XOSD::LEFT
  options.indent = 30
  options.font = "-*-terminus-medium-*-*-*-20-*-*-*-*-*-*-15"
  options.color = "black"
  options.delay = 5
  options.lines = 10
  options.shadow = 1
  options.shadowcolour = "orange"
  options.outline = 1
  options.outlinecolour = "black"
  options.age = 0
  options.wait = 0

  opts = OptionParser.new do |opts|
    opts.banner = "Usage: #$0 [options]"
    opts.separator ""
    opts.separator "Specific options:"

    opts.on("-p", "--pos POS",
            "The vertical position of the text. POS can be top, middle, or bottom. The default is top.") do |p|
      case p
      when /top/i
        options.pos = XOSD::TOP
      when /middle/i
        options.pos = XOSD::MIDDLE
      when /bottom/i
        options.pos = XOSD::BOTTOM
      end
    end

    opts.on("-o", "--offset OFFSET") do |o|
      options.offset = o.to_i
    end

    opts.on("-A", "--align ALIGN") do |a|
      case a
      when /left/i
        options.align = XOSD::LEFT
      when /center/i
        options.align = XOSD::CENTER
      when /right/i
        options.align = XOSD::RIGHT
      end
    end

    opts.on("-i", "--indent OFFSET") do |o|
      options.indent = o.to_i
    end

    opts.on("-f", "--font FONT") do |f|
      options.font = f
    end

    opts.on("-c", "--colour COLOUR") do |o|
      options.color = o
    end

    opts.on("-d", "--delay SECONDS") do |o|
      options.delay = o.to_i
    end

    opts.on("-l", "--lines LINES") do |o|
      options.lines = o.to_i
    end

    opts.on("-O", "--outline OFFSET") do |o|
      options.outline = o.to_i
    end

    opts.on("-u", "--outlinecolour OFFSET") do |o|
      options.outline_color = o
    end

  end
  opts.parse!(args)
  options
end

options = parse(ARGV)

osd = XOSD::XosdScroll.new(options.lines)
osd.position = options.pos
osd.vertical_offset = options.offset
osd.align = options.align
osd.horizontal_offset = options.indent
osd.font = options.font
osd.color = options.color
osd.shadow_offset = options.shadow
osd.shadow_color = options.shadowcolour
osd.outline_offset = options.outline
osd.outline_color = options.outlinecolour
osd.timeout = options.delay

def listen_fifo(fifo_file = FIFO)
  File.open(fifo_file, File::NONBLOCK | File::RDONLY) do |fifo|
    loop do
      sleep 1
      while !fifo.eof
        yield fifo.gets("\n").strip
      end
    end
  end
end


listen_fifo do |fifo|
  puts fifo
  osd << fifo
end

osd.wait(osd.timeout)