#!/usr/bin/env ruby

require "rubygems"
require "optparse"
require "tempfile"
require "chance"

options = {}

optparse = OptionParser.new do|opts|
  # Set a banner, displayed at the top
  # of the help screen.
   opts.banner = "Usage: chance [options] file1 file2 ..."

  # Define the options, and what they do
  options[:verbose] = false
  opts.on( '-v', '--verbose', 'Output more information' ) do
    options[:verbose] = true
  end

  options[:theme] = nil
  opts.on( '-t', '--theme', 'Theme name' ) do |theme|
    options[:theme] = theme
  end

  options[:output] = "chance.css"
  opts.on( '-o', '--output', 'Output file, defaults to chance.css' ) do |output|
    options[:output] = output
  end
end

optparse.parse!


class ExtTempfile < Tempfile
  # overwrite so tempfiles use the extension of the basename.
  def make_tmpname(basename, n)
    basename, ext = basename.split('.', 2)
    super(basename, n) + ".#{ext}"
  end
end

chance = Chance::Instance.new(:theme => options[:theme])

files = ARGV
if files.empty?
  data = ARGF.read
  unless data.empty?
    file = ExtTempfile.new('chance.css')
    file.write(data)
    file.close
    files << file.path
  end
end

files.each do |file|
  Chance.add_file file
  chance.map_file(file, file)
end

chance.update

puts chance.files[options[:output]]