# -*- coding: utf-8 -*-

# Copyright(C) 2014 Oleg Plakhotniuk
#
# This file is part of weboob.
#
# weboob is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# weboob is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with weboob. If not, see <http://www.gnu.org/licenses/>.

import os
import subprocess
from tempfile import mkstemp


__all__ = ['decompress_pdf']


def decompress_pdf(inpdf):
    """
    Takes PDF file contents as a string and returns decompressed version
    of the file contents, suitable for text parsing.

    External dependencies:
    MuPDF (http://www.mupdf.com).
    """

    inh, inname = mkstemp(suffix='.pdf')
    outh, outname = mkstemp(suffix='.pdf')
    os.write(inh, inpdf)
    os.close(inh)
    os.close(outh)

    subprocess.call(['mutool', 'clean', '-d', inname, outname])

    with open(outname) as f:
        outpdf = f.read()
    os.remove(inname)
    os.remove(outname)
    return outpdf