#!/usr/bin/env ruby

require 'maruku'
require 'optparse'

export = :html

OptionParser.new do |opts|
	opts.banner = "Usage: maruku [options] [file1.md [file2.md ..."

	opts.on("-v", "--[no-]verbose", "Run verbosely") do |v|
		MaRuKu::Globals[:verbose] = v end
	opts.on("-u", "--[no-]unsafe", "Use unsafe features") do |v|
		MaRuKu::Globals[:unsafe_features] = v end

	

	opts.on_tail("--pdf",  "Write PDF" ) do export = :pdf  end
	opts.on_tail("--html", "Write HTML") do export = :html end
	opts.on_tail("--tex",  "Write LaTeX" ) do export = :tex  end
	opts.on_tail("--inspect",  "Shows the parsing result" ) do export = :inspect  end

	opts.on_tail("--version", "Show version") do
		puts OptionParser::Version.join('.')
		exit
	end

	opts.on_tail("-h", "--help", "Show this message") do
		puts opts
		exit
	end

end.parse!

#p ARGV
#p MaRuKu::Globals

inputs =
# If we are given filenames, convert each file 
if not ARGV.empty?
	ARGV.map do |f|
		# read file content
		$stderr.puts "Reading from #{f}."
		[f, File.open(f,'r').read]
	end
else
	export = :html_frag if export == :html
	export = :tex_frag if export == :tex
	
	$stderr.puts "Reading from standard input."
	[[nil, $stdin.read]]
end

inputs.each do |f, input|
	
		# create Maruku
		doc = Maruku.new(input, {:on_error=>:warning})

		out=""; prefix = "?"
		case export
		when :html 
			prefix='html'
			out = doc.to_html_document( {:indent => -1})
		when :html_frag 
			prefix='html_frag'
			out = doc.to_html( {:indent => -1})
		when :pdf, :tex
			prefix='tex'
			out = doc.to_latex_document
		when :tex_frag
			prefix='html_frag'
			out = doc.to_latex
		when :inspect
			prefix='.txt'
			out = doc.inspect
		when :markdown
			prefix='pretty_md'
			out = doc.to_markdown
		end
			
		# write to file or stdout
		if f
			dir = File.dirname(f)
			job = File.join(dir, File.basename(f, File.extname(f)))
			filename = job + "." + prefix

			$stderr.puts "Writing to #{filename}"
			File.open(filename,'w') do |f| f.puts out end
			
			if export == :pdf
				cmd = "pdflatex '#{job}' -interaction=nonstopmode "+
				      "'-output-directory=#{dir}' "
				# run twice for cross references
				system cmd 
				system cmd
			end
		else # write to stdout
			$stdout.write out
		end
	end