from unittest import TestCase

import os.path as osp

from xml.etree.cElementTree import ElementTree, fromstring, tostring, dump

from tempfile import NamedTemporaryFile

from subprocess import Popen as sub

from cubicweb.utils import can_do_pdf_conversion

from cubicweb.ext.xhtml2fo import ReportTransformer

DATADIR = osp.join(osp.dirname(__file__), 'data')

class PDFTC(TestCase):

    def test_xhtml_to_fop_to_pdf(self):

        if not can_do_pdf_conversion():

            self.skip('dependencies not available : check pysixt and fop')

        xmltree = ElementTree()

        xmltree.parse(osp.join(DATADIR, 'sample1.xml'))

        foptree = ReportTransformer(u'contentmain').transform(xmltree)

        # next

        foptmp = NamedTemporaryFile()

        foptree.write(foptmp)

        foptmp.flush()

        pdftmp = NamedTemporaryFile()

        fopproc = sub(['/usr/bin/fop', foptmp.name, pdftmp.name])

        fopproc.wait()

        del foptmp

        if fopproc.returncode:

            self.skip('fop returned status %s' % fopproc.returncode)

        pdftmp.seek(0) # a bit superstitious

        reference = open(osp.join(DATADIR, 'sample1.pdf'), 'r').read()

        output = pdftmp.read()

        # XXX almost equals due to ID, creation date, so it seems to fail

        self.assertEquals( len(output), len(reference) )

        # cut begin & end 'cause they contain variyng data

        self.assertTextEquals(output[150:1500], reference[150:1500])