#!/usr/bin/env ruby
require 'yaml'
require 'paru/pandoc'
require_relative 'pandoc2yaml'

include Pandoc2Yaml

if ARGV.size != 1
  warn 'Expecting exactly one argument: the pandoc file to convert'
  exit
end

input = ARGV.first
metadata = YAML.load Pandoc2Yaml.extract_metadata(input)

if metadata.has_key? 'pandoc'
  begin
    pandoc = Paru::Pandoc.new
    to_stdout = true
    metadata['pandoc'].each do |option, value|
      pandoc.send option, value
      to_stdout = false if option == 'output'
    end
    output = pandoc << File.read(input)
    puts output if to_stdout
  rescue Exception => e
    warn "Something went wrong while using pandoc:\n\n#{e.message}"
  end
else
  warn "Unsure what to do: no pandoc options in #{input}"
end