#!/usr/bin/python

from sys import argv, exit
import tempfile
import os
import getopt

options, args = getopt.gnu_getopt(argv[1:], 'a:')

if len(args) == 2:
	infile = os.path.abspath(args[0])
	outfile = os.path.abspath(args[1])
	if not os.path.exists(infile):
		print "Error: input file '%s' does not exist" % args[0]
		exit(-1)
	angle = 90
	for option in options:
		if option[0] == '-a':
			angle = option[1]
	if outfile == '':
		print "Error: no output file name given"
		exit(-1)

	tmpdir = tempfile.mkdtemp()
	texfile = open(os.path.join(tmpdir, 'tmp.tex'), 'w')
	texfile.write("""\\documentclass{article}
\\usepackage{pdfpages}
\\begin{document}
\\includepdf[pages=-,fitpaper=true,angle=%s]{%s}
\\end{document}""" % (angle, infile))
	texfile.close()

	os.chdir(os.path.dirname(texfile.name))
	os.spawnvp(os.P_WAIT, 'pdflatex', ['pdflatex', texfile.name])
	os.rename(os.path.join(tmpdir, 'tmp.pdf'), outfile)

	for f in os.listdir(tmpdir):
		os.unlink(f)
	os.removedirs(tmpdir)

else:
	print 'usage: pdfrotate [-a ANGLE (degrees, default=90)] INPUT OUPUT'