require 'tempfile'
require 'launchy'
require 'rest_client'

module Mdoc
  class Html < Text
    def convert
      htmlname = @file.gsub(/\.md$/, '.html')
      # content = `curl -X POST --data-urlencode content@#{@file} http://documentup.com/compiled`
      title = @title
      title = 'Preview' unless (title and title.size > 0)      
      
      resp = RestClient.post 'http://documentup.com/compiled', :content => @body, :name => title
      content = resp.body

      # convert the received content
      content.gsub!('<title>undefined</title>', "<title>#{title}</title>")
      content.gsub!('<a href="#" id="logo">undefined</a>', "<a href='\#' id='logo'>#{title}</a>")
      wfh = File.new(htmlname, 'w')
      wfh.write content
      wfh.close
      Launchy.open("file://" + htmlname)
    end
  end

  class Pandoc < Text
    def _convert type
      base_name = @file.gsub(/\.md$/, '')
      tmp_file = base_name + "__.md"
      
      tfh = File.new(tmp_file, 'w:utf-8')
      tfh.puts("% #{@title}") if @title
      tfh.puts("% #{@author}") if @author
      tfh.puts("% #{@date}") if @date
      tfh.puts("")
      tfh.puts(@body)
      tfh.close

      `pandoc -o #{base_name}.#{type} #{tmp_file}`
      File.unlink tmp_file
    end
  end

  class Rtf < Pandoc
    def convert; self._convert('rtf') end
  end

  class Docx < Pandoc
    def convert; self._convert('docx') end
  end

  class Pdf < Pandoc
    def convert
      self._convert('tex')
      basename = @file.gsub(/\.md$/, '')
      File.rename(basename + ".tex", basename + '__.tex')
      fh = File.new(@file.gsub(/\.md$/, '.tex'), 'w:utf-8')
      hd =<<ENDHEADER
\\documentclass[11pt,twocolumn]{article}                                                                            
\\setlength{\\parindent}{2em}
\\usepackage{fontspec}
\\setmainfont{NSimSun}
\\usepackage{xeCJK}

\\begin{document}
ENDHEADER

      fh.puts hd
      rfh = File.new(basename + '__.tex', 'r:utf-8')
      rfh.each do |line|
        fh.puts line
      end

      fh.puts "\n\n\\end{document}\n\n"
      rfh.close
      fh.close

      #`xelatex #{basename + ".tex"}`

      #%w[log tex aux].each {|type| File.unlink(basename + ".#{type}")}
      #File.unlink(basename + '__.tex')
    end
  end
end