#
# Copyright 2010 Zuza Software Foundation
#
# This file is part of the Translate Toolkit.
#
# This program 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.
#
# This program 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/>.

"""Module to guess the language ISO code based on the 'Language-Team' entry in
the header of a Gettext PO file.
"""

import re


__all__ = ("LANG_TEAM_CONTACT_SNIPPETS", "guess_language")

LANG_TEAM_REGEX = (
    ("@li.org", "([a-z_A-Z]{2,})@li.org", ["LL", "XX", "TEAM"]),
    ("translation-team", "translation-team-([a-z_A-Z]+)@lists.sourceforge.net", None),
    ("fedora-trans", "fedora-trans-([a-z_A-Z]+)@redhat.com", ["list"]),
    ("ubuntu-l10n", "ubuntu-l10n-([a-z_A-Z]+)@lists.ubuntu.com", None),
    ("translate-discuss", "translate-discuss-([a-z_A-Z]+)@lists.sourceforge.net", None),
    ("kde-i18n", r"kde-i18n-([a-z_A-Z]+)@(?:lists\.|mail\.|)kde.org", ["doc"]),
    ("kde-l10n", "kde-l10n-([a-z_A-Z]+)@kde.org", None),
    ("fedoraproject", "trans-([a-z_A-Z]+)@lists.fedoraproject.org", None),
    ("gnome.org", "gnome-([a-z_A-Z]+)-list@gnome.org", ["latin"]),
)
"""Data for regular expression based extraction.  The fieds are: prefilter
information, regex with single group that contains the language code,
postfilter."""

LANG_TEAM_CONTACT_SNIPPETS = {
    "af": (
        "i18n@af.org.za",
        "Petri Jooste",
    ),
    "am": ("@geez.org",),
    "ar": (
        "arabeyes.org",
        "Arabeyes",
    ),
    "as": ("assam@mm.assam-glug.org",),
    "ast": (
        "@softastur.org",
        "launchpad.net/~ubuntu-l10n-ast",
        "softast-xeneral@lists.sourceforge.net",
        "Softastur",
    ),
    "az": (
        "linuxaz@azerimal.net",
        "gnome@azitt.com",
        "gnome@azətt.com",
    ),
    "az_IR": ("az-ir@lists.sharif.edu",),
    "be": (
        "i18n@mova.org",
        "i18n@tut.by",
        "mozilla_byx@poczta.fm",
    ),
    "be@latin": (
        "translation-team-be-latin@lists",
        "be-latin.open-tran.eu",
    ),
    "bg": (
        "dict@fsa-bg.org",
        "dict@linux.zonebg.com",
    ),
    "bn": (
        "gnome-translation@bengalinux.org",
        "core@bengalinux.org",
        "ankur-bd-l10n@googlegroups.com",
        "redhat-translation@bengalinux.org",
    ),
    "bn_IN": ("anubad@lists.ankur.org.in",),
    "br": (
        "drouizig@drouizig.org",
        "brenux@free.fr",
        "tradgnome@softcatala.net",
        "fedora@softcatala.org",
    ),
    "bs": (
        "lokal@linux.org.ba",
        "lokal@lugbih.org",
    ),
    "ca": ("@softcatala.org",),
    "crh": ("tilde-birlik-tercime@lists.sourceforge.net",),
    "cs": (
        "fedora-cs-list@redhat.com",
        "cs-users@lists.fedoraproject.org",
        "debian-l10n-czech@lists.debian.org",
        "kde-czech-apps@lists.sourceforge.net",
        "kde-czech-apps@lists.sf.net",
        "translations.cs@gnupg.cz",
    ),
    "cy": (
        "gnome-cy@lists.linux.org.uk",
        "gnome-cy@pengwyn.linux.org.uk",
        "gnome-cy@www.linux.org",
        "gnome-cy@www.linux.org.uk",
        "cy@pengwyn.linux.org.uk",
    ),
    "da": (
        "dansk@dansk-gruppen.dk",
        "dansk@klid.dk",
        "sslug-locale@sslug.dk",
    ),
    "de": (
        "gnome-de@gnome.org",
        "debian-l10n-german@lists.debian.org",
    ),
    "dz": (
        "pgeyleg@dit.gov.bt",
        "pgyeleg@dit.gov.bt",
    ),
    "el": (
        "debian-l10n-greek@lists.debian.org",
        "i18ngr@lists.hellug.gr",
        "i18n@hellug.gr",
        "nls@tux.hellug.gr",
        "team@gnome.gr",
        "team@lists.gnome.gr",
        "users@el.openoffice.org",
    ),
    "en_AU": ("trans@six-by-nine.com.au",),
    "en_CA": (
        "adamw@gnome.org",
        "adamw@freebsd.org",
    ),
    "en_GB": ("kde-en-gb@kde.me.uk",),
    "en@shaw": (
        "ubuntu-l10n-en-shaw@launchpad.net",
        "ubuntu-l10n-en-shaw@lists.launchpad.net",
    ),
    "eo": (
        "eo-tradukado@lists.tuxfamily.org",
        "debian-l10n-esperanto@lists.debian.org",
        "ubuntu-l10n-eo@lists.launchpad.net",
        "eo-tradukado.tuxfamily.org",
    ),
    "es": (
        "pgsql-es-ayuda@postgresql.org",
        "debian-l10n-spanish@lists.debian.org",
        "gnome-es@gnome.org",
        "traductores@es.gnome.org",
    ),
    "et": (
        "gnome-et@linux.ee",
        "kde-et@linux.ee",
        "linux-ee@lists.eenet.ee",
        "linux-et@lists.eenet.ee",
        "et-gnome@linux.ee",
        "linux-ee@eenet.ee",
    ),
    "eu": (
        "debian-l10n-basque@lists.debian.org",
        "debian-l10n-eu@lists.debian.org",
        "itzulpena@euskalgnu.org",
        "gnome@euskalgnu.org",
        "librezale@librezale.org",
        "linux-eu@chanae.alphanet.ch",
    ),
    "fa": (
        "farsi@lists.sharif.edu",
        "Farsiweb.info",
    ),
    "fi": (
        "debian-l10n-finnish@lists.debian.org",
        "gnome-fi-laatu@lists.sourceforge.net",
        "laatu@lokalisointi.org",
        "lokalisointi-laatu@linux-aktivaattori.org",
        "laatu@gnome.fi",
        "yast-trans-fi@kotoistaminen.novell.fi",
    ),
    "fr": (
        "debian-l10n-french@lists.debian.org",
        "gnomefr@traduc.org",
        "kde-francophone@kde.org",
        "traduc@traduc.org",
        "pgsql-fr-generale@postgresql.org",
        "rpm-fr@livna.org",
    ),
    "ga": (
        "gaeilge-gnulinux@lists.sourceforge.net",
        "gaeilge-a@listserv.heanet.ie",
    ),
    "gl": (
        "trasno@ceu.fi.udc.es",
        "gnome@g11n.net",
        "gpul-traduccion@ceu.fi.udc.es",
        "proxecto@trasno.net",
        "trasno@gpul.org",
    ),
    "gu": ("indianoss-gujarati@lists.sourceforge.net",),
    "he": (
        "debian-hebrew-common@lists.alioth.debian.org",
        "kde-il@yahoogroups.com",
        "fedora-he-list@redhat.com",
        "mdk-hebrew@iglu.org.il",
    ),
    "hi": (
        "indlinux-hindi-gnome@lists.sourceforge.net",
        "indlinux-hindi@lists.sourceforge.net",
    ),
    "hr": (
        "translator-shop.org",
        "lokalizacija@linux.hr",
    ),
    "hu": (
        "debian-l10n-hungarian@lists.debian.org",
        "gnome@fsf.hu",
        "gnome@gnome.hu",
        "magyar@lists.linux.hu",
    ),
    "id": (
        "@id.gnome.org",
        "@gnome.linux.or.id",
        "mdk-id@yahoogroups.com",
        "linux.or.id",
        "gnome@i15n.org",
    ),
    "io": ("gnome-ido@lists.mterry.name",),
    "is": (
        "gnome@techattack.nu",
        "kde-isl@mmedia.is",
        "kde-isl@molar.is",
    ),
    "it": (
        "debian-l10n-italian@lists.debian.org",
        "traduzioni@itpug.org",
        "fedora-trans-it@redhat.com",
        "tp@lists.linux.it",
    ),
    "ja": (
        "debian-doc@debian.or.jp",
        "debian-japanese@lists.debian.org",
        "gnome-translation@gnome.gr.jp",
        "translation@gnome.gr.jp",
        "jpug-doc@ml.postgresql.jp",
    ),
    "ka": (
        "geognome@googlegroups.com",
        "Ubuntu-Georgian-Translators@googlegroups.com",
    ),
    "kk": ("kk_KZ@googlegroups.com",),
    "km": ("@khmeros.info",),
    "kn": ("debian-l10n-kannada@lists.debian.org",),
    "ko": (
        "gnome-kr-hackers@list.kldp.net",
        "gnome-kr-hackers@lists.kldp.net",
        "gnome-kr-translation@lists.kldp.net",
        "pgsql-kr@postgresql.or.kr",
        "hangul-hackers@lists.kldp.net",
        "debian-l10n-korean@lists.debian.org",
        "gnome-kr-translation@lists.sourceforge.net",
    ),
    "ks": ("ks-gnome-trans-commits@lists.code.indlinux.net",),
    "ku": ("gnu-ku-wergerandin@lists.sourceforge.net",),
    "ky": (
        "i18n-team-ky-kyrgyz@lists.sourceforge.net",
        "ky-li@mail.ru",
    ),
    "la": ("gnome-latin-list@gnome.org",),
    "li": ("li@gnome.org",),
    "lt": (
        "gimp-lt@lists.akl.lt",
        "gnome-lt@lists.akl.lt",
        "gnome-lt@lists.gnome.org",
        "komp_lt@konferencijos.lt",
    ),
    "lv": (
        "lata-l10n@googlegroups.com",
        "lata-i18n@groups.google.com",
        "locale@laka.lv",
        "ll10nt@os.lv",
    ),
    "mai": ("maithili.sf.net",),
    "mg": ("i18n-malagasy-gnome@gnome.org",),
    "mi": ("maori@nzlinux.org.nz",),
    "mk": (
        "gnomk-main@lists.sourceforge.net",
        "lug@lists.linux.net.mk",
        "mkde-l10n@lists.sourceforge.net",
        "ossm-members@hedona.on.net.mk",
    ),
    "ml": ("smc-discuss@googlegroups.com",),
    "mn": (
        "openmn-",
        "openmn.org",
    ),
    "ms": (
        "gabai-penyumbang@lists.sourceforge.net",
        "gabai-penyumbang@lists.sf.net",
        "kedidiemas@yahoogroups.com",
    ),
    "nb": ("i18n-nb@lister.ping.uio.no",),
    "nds": ("nds-lowgerman@lists.sourceforge.net",),
    "ne": ("info@mpp.org.np",),
    "nl": (
        "debian-l10n-dutch@lists.debian.org",
        "vertaling@nl.gnome.org",
        "vertaling@vrijschrift.org",
        "nl@vrijschrift.org",
        "vertaling@nl.linux.org",
        "vertaling@nl.li.org",
    ),
    "nn": ("i18n-nn@lister.ping.uio.no",),
    "nso": ("sepedi@translate.org.za",),
    "or": (
        "oriya-group@lists.sarovar.org",
        "oriya-it@googlegroups.com",
    ),
    "pa": (
        "punjabi-l10n@users.sf.net",
        "fedora-pa-list@redhat.com",
        "punjabi-users@lists.sf.net",
        "punjabi-l10n@lists.sourceforge.net",
        "punlinux-i18n@lists.sourceforge.net",
    ),
    "pl": (
        "gnomepl@aviary.pl",
        "debian-l10n-polish@lists.debian.org",
        "gnome-l10n@lists.aviary.pl",
        "translators@gnomepl.org",
    ),
    "ps": ("pathanisation@googelgroups.com",),
    "pt": (
        "fedora-trans-pt@redhat.org",
        "gnome_pt@yahoogroups.com",
        "traduz@debianpt.org",
        "traduz@debian.pt",
    ),
    "pt_BR": (
        "gnome-l10n-br@listas.cipsga.org.br",
        "gnome-pt_br-list@gnome.org",
        "fedora-docs-br@redhat.com",
        "fedora-trans-pt-br@redhat.com",
        "ldp-br@bazar.conectiva.com.br",
        "pgbr-dev@postgresql.org.br",
        "pgbr-dev@listas.postgresql.org.br",
        "debian-l10n-portuguese@lists.debian.org",
    ),
    "ro": (
        "fedora-ro@googlegroups.com",
        "gnomero-list@lists.sourceforge.net",
        "debian-l10n-romanian@lists.debian.org",
    ),
    "ru": (
        "pgsql-rus@yahoogroups.com",
        "debian-l10n-russian@lists.debian.org",
        "gnupg-ru@gnupg.org",
    ),
    "scn": ("l10n@cademiasiciliana.org",),
    "sk": (
        "sk-i18n@lists.linux.sk",
        "kde-sk@linux.sk",
    ),
    "sl": ("gnome-si@googlegroups.com",),
    "sq": (
        "gnome-albanian-perkthyesit@lists.sourceforge.net",
        "debian-l10n-albanian@lists.debian.org",
    ),
    "sr": (
        "@prevod.org",
        "serbiangnome-lista@nongnu.org",
    ),
    "sv": (
        "debian-l10n-swedish@lists.debian.org",
        "tp-sv@listor.tp-sv.se",
    ),
    "ta": (
        "gnome-tamil-translation@googlegroups.com",
        "tamilinix@yahoogroups.com",
        "Ubuntu-l10n-tam@lists.ubuntu.com",
        "tamil-DI@yahoogroups.com",
    ),
    "te": (
        "localisation@swecha.org",
        "indlinux-telugu@lists.sourceforge.net",
    ),
    "th": (
        "l10n@opentle.org",
        "thai-l10n@googlegroup.com",
        "thailang@buraphalinux.org",
        "thai-l10n@googlegroups.com",
        "l10n.opentle.org",
    ),
    "tk": ("kakilikgroup@yahoo.com",),
    "tl": ("debian-tl@banwa.upm.edu.ph",),
    "tr": (
        "debian-l10n-turkish@lists.debian.org",
        "gnome-turk@gnome.org",
        "gnu-tr-u12a@lists.sourceforge.net",
        "turkce@pardus.org.tr",
    ),
    "tt": ("tatarish.l10n@gmail.com",),
    "ug": ("gnome-uighur@yahoogroups.com",),
    "uk": ("linux@linux.org.ua",),
    "ur": (
        "l10n@urduweb.org",
        "urdu.scs.gift@gmail.com",
    ),
    "ve": ("venda@translate.org.za",),
    "vi": (
        "gnomevi-list@lists.sourceforge.net",
        "vi-VN@googlegroups.com",
    ),
    "wa": ("linux-wa@",),
    "xh": (
        "xh-translate@ubuntu.com",
        "xhosa@translate.org.za",
        "xhosa@ubuntu.com",
    ),
    "zh_CN": (
        "i18n-translation@lists.linux.net.cn",
        "i18n-zh@googlegroups.com",
        "translation-team-zh-cn@lists.sourceforge.net",
        "i18n-zh@googlegroup.com",
    ),
    "zh_TW": (
        "zh-l10n@lists.linux.org.tw",
        "chinese-l10n@googlegroups.com",
        "community@linuxhall.org",
        "zh-l10n@linux.org.tw",
    ),
    "zu": ("zulu@translate.org.za",),
}
"""Language codes with snippets of contact information that can be used to
uniquely identify the language"""

LANG_TEAM_LANGUAGE_SNIPPETS = {
    "af": ("Afrikaans",),
    "am": ("Amharic",),
    "ang": ("Old English",),
    "ar": ("Arabic",),
    "as": ("Assamese",),
    "ast": ("Asturian",),
    "az": (
        "Azerbaijani",
        "Azərbaycan",
    ),
    "bg": ("Bulgarian",),
    "be@latin": ("Belarusian Latin",),
    "be": (
        "Belarusian",
        "Belorussian",
    ),
    "bn_IN": (
        "Bengali (India)",
        "Bengali INDIA",
        "Bengali India",
    ),
    "bn": (
        "Bangladeshi",
        "Bengali",
    ),
    "br": (
        "Breton",
        "Britton",
    ),
    "bs": (
        "Bosanski",
        "Bosnian",
    ),
    "byn": ("Blin",),
    "ca": ("Catalan",),
    "ckb": ("Kurdish (Sorani)",),
    "crh": (
        "Crimean Tatar",
        "Crimean Turkish",
    ),
    "cs": ("Czech",),
    "cy": (
        "Cymru",
        "Welsh",
    ),
    "da": (
        "Danish",
        "Dansk",
    ),
    "de": (
        "Deutsch",
        "German",
    ),
    "dz": ("Dzongkha",),
    "el": ("Greek",),
    "en_GB": (
        "British English",
        "en_GB",
        "English (Great Britain)",
    ),
    "eo": ("Esperanto",),
    "es": (
        "Spanish",
        "es_ES",
        "Español",
    ),
    "et": (
        "Eesti",
        "Estonian",
    ),
    "eu": (
        "Basque",
        "Euskara",
    ),
    "fa": ("Persian",),
    "fi": (
        "Finnish",
        "Suomi",
    ),
    "fo": ("Faroese",),
    "fr": (
        "French",
        "Français",
    ),
    "fur": ("Friulian",),
    "ga": ("Irish",),
    "gez": ("Geez",),
    "gl": (
        "Galego",
        "Galician",
        "Gallegan",
        "gl_ES",
    ),
    "gu": ("Gujarati",),
    "haw": ("Hawaiian",),
    "he": ("Hebrew",),
    "hi": ("Hindi",),
    "hr": ("Croatian",),
    "hu": ("Hungarian",),
    "hy": ("Armenian",),
    "ia": ("Interlingua",),
    "id": (
        "Bahasa Indonesia",
        "Indonesia",
        "Indonesian",
    ),
    "ig": ("Igbo",),
    "is": ("Icelandic",),
    "it": ("Italian",),
    "ja": ("Japanese",),
    "ka": ("Georgian",),
    "kk": ("Kazakh",),
    "km": ("Khmer",),
    "kn": ("Kannada",),
    "ko": (
        "Korean",
        "Hangul",
    ),
    "kok": ("Konkani",),
    "ks": ("Kashmiri",),
    "ku": ("Kurdish",),
    "ky": (
        "Kitghiz",
        "Kirghiz",
    ),
    "lg": ("Luganda",),
    "li": ("Limburgish",),
    "lt": ("Lithuanian",),
    "lv": (
        "Latvian",
        "lv_LV",
        "Valoda",
        "Latviešu",
    ),
    "mal": ("Malayalam",),
    "mg": ("Malagasy",),
    "mi": ("Maori",),
    "mk": ("Macedonian",),
    "ml": ("Malayalam",),
    "mn": ("Mongolian",),
    "mt": ("Marathi",),
    "ms": (
        "Malay",
        "Bahasa Melayu",
    ),
    "my": ("Burmese",),
    "nb": (
        "Norwegian Bokmaal",
        "Norsk bokmål",
        "Norwegian Bokmål",
        "Norwegian bokmål",
    ),
    "nds": ("Low Saxon",),
    "nl": (
        "Dutch",
        "Nederlands",
    ),
    "nn": (
        "Norwegian nynorsk",
        "Nynorsk",
    ),
    "oc": ("Occitan",),
    "or": ("Oriya",),
    "pa": (
        "Punjabi",
        "Panjabi",
    ),
    "pl": ("Polish",),
    "ps": (
        "Pashto",
        "Pushto",
    ),
    "pt_BR": (
        "Brazilian Portuguese",
        "Português/Brasil",
        "Português do Brasil",
    ),
    "pt": ("Portuguese",),
    "rm": ("Rhaeto-Romance",),
    "ro": (
        "Romania",
        "Romanian",
        "Română",
    ),
    "ru": ("Russian",),
    "scn": (
        "Sicilian",
        "Sicilianu",
        "Siciliano",
    ),
    "si": (
        "Sinhala",
        "Sinhalese",
    ),
    "sk": ("Slovak",),
    "sl": (
        "Slovene",
        "Slovenian",
    ),
    "so": ("Somali",),
    "sq": ("Albanian",),
    "sr": ("Serbian",),
    "sv": ("Swedish",),
    "sw": ("Swahili",),
    "ta": ("Tamil",),
    "te": ("Telugu",),
    "tet": ("Tetum",),
    "tg": ("Tajik",),
    "th": ("Thai",),
    "ti": ("Tigrinya",),
    "tig": ("Tigre",),
    "tl": ("Tagalog",),
    "tr": (
        "Turkish",
        "Türkçe",
        "Türkiye",
    ),
    "tt": ("Tatarish",),
    "ug": ("Uighur",),
    "uk": ("Ukrainian",),
    "ur": ("Urdu",),
    "uz": ("Uzbek",),
    "ve": (
        "Venda",
        "Tshivenḓa",
        "Tshivenda",
    ),
    "vi": ("Vietnamese",),
    "wa": ("Walloon",),
    "wal": ("Walamo",),
    "wo": ("Wolof",),
    "xh": (
        "Xhosa",
        "IsiXhosa",
        "isiXhosa",
    ),
    "yi": ("Yiddish",),
    "yo": ("Yoruba",),
    "zh_CN": (
        "Chinese Simplified",
        "Chinese/Simplified",
        "Chinese (simplified)",
        "Simplified Chinese",
    ),
    "zh_HK": ("Chinese (Hong Kong)",),
    "zh_TW": (
        "Chinese (traditional)",
        "Chinese/Traditional",
        "Traditional Chinese",
    ),
}
"""Language codes with snippets of language names, including English, native
spelling and varients, that can be used to uniquely identify the language"""


def _regex_guesser(prefilter, regex, string, postfilter=None):
    """Use regular expressions to extract the language team

    :param prefilter: simple filter to apply before attempting the regex
    :param regex: regular expression with one group that will contain
    the language code
    :param string: the language team string that should be examined
    :param postfilter: filter to apply to reject any potential matches
    after they have been retreived by the regex
    :return: ISO language code for the found language
    """
    # TODO instead of a posfilter, have a dictionary of transform rules
    # e.g. for debian-l10n-albanian a dict of {'russian': 'ru' would allow
    # transformation.  {'default': None} would ensure that anything we
    # don't understand gets ignored.  Or {'default': 'nothing'} means to
    # nothing.
    if prefilter in string:
        found = re.search(regex, string)
        if found:
            regex_lang = found.groups()[0]
        else:
            return None
        if postfilter is not None and regex_lang in postfilter:
            return None
        if regex_lang and regex_lang != "en":
            return regex_lang
    return None


def _nofilter(text):
    """Return the supplied text unchanged"""
    return text


def _lower(text):
    """Convert the supplied text to lowercase"""
    return text.lower()


def _snippet_guesser(snippets_dict, string, filter_=_nofilter):
    """Guess the language based on a snippet of text in the language team
    string.

    :param snippets_dict: A dict of snippets that can be used to identify a
    language in the format {'lang': ('snippet1', 'snippet2'), 'lang2'...}
    :param string: The language string to be analysed
    :param filter_: a function to be applied to the string and snippets
    before examination
    """
    string = filter_(string)
    for possible_lang, snippets in snippets_dict.items():
        for snippet in snippets:
            if filter_(snippet) in string:
                return possible_lang
    return None


def guess_language(team_string):
    """Gueses the language of a PO file based on the Language-Team entry"""

    for prefilter, regex, postfilter in LANG_TEAM_REGEX:
        lang = _regex_guesser(prefilter, regex, team_string, postfilter)
        if lang:
            break

    if not lang:
        lang = _snippet_guesser(LANG_TEAM_CONTACT_SNIPPETS, team_string, _lower)

    if not lang:
        lang = _snippet_guesser(LANG_TEAM_LANGUAGE_SNIPPETS, team_string)

    # TODO Maybe clean everything and see of we have a language code only

    if not lang:
        # print ("MISSED: '%s'" % team_string).encode('utf-8')
        return None
    return lang


if __name__ == "__main__":
    from sys import argv

    from translate.storage import factory

    for fname in argv[1:]:
        store = factory.getobject(fname)
        print(fname, guess_language(store.parseheader().get("Language-Team", "")))
