#
# Copyright 2004-2006 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 Qt Linguist (.ts) files to Gettext PO localization files.

See: http://docs.translatehouse.org/projects/translate-toolkit/en/latest/commands/ts2po.html
for examples and usage instructions.
"""

from translate.convert import convert
from translate.misc.multistring import multistring
from translate.storage import po, ts2


class ts2po:
    def __init__(self, duplicatestyle="msgctxt", pot=False) -> None:
        self.duplicatestyle = duplicatestyle
        self.pot = pot

    def convertmessage(
        self,
        contextname,
        messagenum,
        source,
        target,
        disambiguation,
        msgcomments,
        transtype,
        hasplural,
    ):
        """Makes a pounit from the given message."""
        thepo = po.pounit(encoding="UTF-8")
        thepo.addlocation(f"{contextname}#{messagenum}")
        # Handle plural forms: TS format stores only one source form (the plural),
        # but PO needs both singular and plural. We duplicate the TS plural form for both.
        if hasplural and isinstance(source, multistring):
            # Use the plural form from TS as both singular and plural in PO
            plural_form = source.strings[0] if source.strings else ""
            thepo.source = multistring([plural_form, plural_form])
        else:
            thepo.source = source
        if not self.pot:
            thepo.target = target
        if len(disambiguation) > 0:
            thepo.setcontext(disambiguation)
        if len(msgcomments) > 0:
            thepo.addnote(msgcomments)
        if transtype == "unfinished" and thepo.istranslated():
            thepo.markfuzzy()
        if transtype == "obsolete":
            # This should use the Gettext obsolete method but it would require quite a bit of work
            thepo.addnote("(obsolete)", origin="developer")
            # using the fact that -- quote -- "(this is nonsense)"
        return thepo

    def convertfile(self, inputfile):
        """Converts a .ts file to .po format."""
        tsfile = ts2.tsfile(inputfile)
        thetargetfile = po.pofile()

        previouscontext = ""
        for inputunit in tsfile.units:
            contexts = inputunit.getcontext().split("\n")

            context = contexts[0].strip()
            # skip the unit if the context is empty
            if not context:
                continue

            if context != previouscontext:
                previouscontext = context
                messagenum = 0

            disambiguation = ""
            if len(contexts) > 1:
                disambiguation = contexts[1]
            messagenum += 1
            thepo = self.convertmessage(
                context,
                messagenum,
                inputunit.source,
                inputunit.target,
                disambiguation,
                inputunit.getnotes(),
                inputunit._gettype(),
                inputunit.hasplural(),
            )
            thetargetfile.addunit(thepo)

        thetargetfile.removeduplicates(self.duplicatestyle)
        return thetargetfile


def convertts(
    inputfile, outputfile, templates, pot=False, duplicatestyle="msgctxt"
) -> int:
    """Reads in stdin using fromfileclass, converts using convertorclass, writes to stdout."""
    convertor = ts2po(duplicatestyle=duplicatestyle, pot=pot)
    outputstore = convertor.convertfile(inputfile)
    if outputstore.isempty():
        return 0
    outputstore.serialize(outputfile)
    return 1


def main(argv=None) -> None:
    formats = {"ts": ("po", convertts)}
    parser = convert.ConvertOptionParser(formats, usepots=True, description=__doc__)
    parser.add_duplicates_option()
    parser.passthrough.append("pot")
    parser.run(argv)


if __name__ == "__main__":
    main()
