#!/usr/bin/env ruby

require_relative "../lib/unicoder"
require "rationalist"

args = Rationalist.parse
command = args[:_][0]
identifier = args[:_][1]
KNOWN_OPTIONS = [:version, :help, :verbose, :format, :gzip]
options = args.select { |option,| KNOWN_OPTIONS.include? option }

if options.has_key?(:version)
  puts "unicoder #{Unicoder::VERSION}"
elsif options.has_key?(:help)
  puts <<USAGE_INSTRUCTIONS

  USAGE

    unicoder fetch <data_identifier>
    unicoder build <builder_name> <output_file>

  DATA FILE IDENTIFIERS

    …

  BUILDERS

    …

USAGE_INSTRUCTIONS
else
  case command
  when "fetch"
    Unicoder::Downloader.fetch(identifier, **options)
  when "build"
    Unicoder::Builder.build(identifier, **options)
  else
    raise ArgumentError, "Unknown unicoder command!"
  end
end