# -*- coding: utf-8 -*-
#
# Copyright 2005, 2006 Zuza Software Foundation
#
# This file is part of translate.
#
# translate is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# translate 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <http://www.gnu.org/licenses/>.

"""Convert Gettext PO localization files to XLIFF localization files.

See: http://docs.translatehouse.org/projects/translate-toolkit/en/latest/commands/xliff2po.html
for examples and usage instructions.
"""

from translate.storage import po, poxliff


class po2xliff(object):

    def convertunit(self, outputstore, inputunit, filename):
        """creates a transunit node"""
        source = inputunit.source
        target = inputunit.target
        if inputunit.isheader():
            unit = outputstore.addheaderunit(target, filename)
        else:
            unit = outputstore.addsourceunit(source, filename, True)
            unit.target = target
            #Explicitly marking the fuzzy state will ensure that normal (translated)
            #units in the PO file end up as approved in the XLIFF file.
            if target:
                unit.markfuzzy(inputunit.isfuzzy())
            else:
                unit.markapproved(False)

            #Handle #: location comments
            for location in inputunit.getlocations():
                unit.createcontextgroup("po-reference", self.contextlist(location), purpose="location")

            #Handle #. automatic comments
            comment = inputunit.getnotes("developer")
            if comment:
                unit.createcontextgroup("po-entry", [("x-po-autocomment", comment)], purpose="information")
                unit.addnote(comment, origin="developer")

            #TODO: x-format, etc.

        #Handle # other comments
        comment = inputunit.getnotes("translator")
        if comment:
            unit.createcontextgroup("po-entry", [("x-po-trancomment", comment)], purpose="information")
            unit.addnote(comment, origin="po-translator")

        return unit

    def contextlist(self, location):
        contexts = []
        if ":" in location:
            sourcefile, linenumber = location.split(":", 1)
        else:
            sourcefile, linenumber = location, None
        contexts.append(("sourcefile", sourcefile))
        if linenumber:
            contexts.append(("linenumber", linenumber))
        return contexts

    def convertstore(self, inputstore, templatefile=None, **kwargs):
        """converts a .po file to .xlf format"""
        if templatefile is None:
            outputstore = poxliff.PoXliffFile(**kwargs)
        else:
            outputstore = poxliff.PoXliffFile(templatefile, **kwargs)
        filename = inputstore.filename
        for inputunit in inputstore.units:
            if inputunit.isblank():
                continue
            transunitnode = self.convertunit(outputstore, inputunit, filename)
        return bytes(outputstore)


def convertpo(inputfile, outputfile, templatefile):
    """reads in stdin using fromfileclass, converts using convertorclass, writes to stdout"""
    inputstore = po.pofile(inputfile)
    if inputstore.isempty():
        return 0
    convertor = po2xliff()
    outputstring = convertor.convertstore(inputstore, templatefile)
    outputfile.write(outputstring)
    return 1


def main(argv=None):
    from translate.convert import convert
    formats = {
        "po": ("xlf", convertpo),
        ("po", "xlf"): ("xlf", convertpo),
        "po": ("xliff", convertpo),
        ("po", "xliff"): ("xliff", convertpo),
    }
    parser = convert.ConvertOptionParser(formats, usetemplates=True,
                                         description=__doc__)
    parser.run(argv)


if __name__ == '__main__':
    main()
