#!/usr/bin/env python2
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"""Convert CLDR data to qLocaleXML

The CLDR data can be downloaded from CLDR_, which has a sub-directory
for each version; you need the ``core.zip`` file for your version of
choice (typically the latest).  This script has had updates to cope up
to v35; for later versions, we may need adaptations.  Unpack the
downloaded ``core.zip`` and check it has a common/main/ sub-directory:
pass the path of that sub-directory to this script as its single
command-line argument.  Save its standard output (but not error) to a
file for later processing by ``./qlocalexml2cpp.py``

When you update the CLDR data, be sure to also update
src/corelib/tools/qt_attribution.json's entry for unicode-cldr.  Check
this script's output for unknown language, country or script messages;
if any can be resolved, use their entry in common/main/en.xml to
append new entries to enumdata.py's lists and update documentation in
src/corelib/tools/qlocale.qdoc, adding the new entries in alphabetic
order.

.. _CLDR: ftp://unicode.org/Public/cldr/
"""

import os
import sys
import re

import enumdata
import xpathlite
from xpathlite import DraftResolution, findAlias, findEntry, findTagsInFile
from dateconverter import convert_date
from localexml import Locale

findEntryInFile = xpathlite._findEntryInFile

def parse_number_format(patterns, data):
    # this is a very limited parsing of the number format for currency only.
    def skip_repeating_pattern(x):
        p = x.replace('0', '#').replace(',', '').replace('.', '')
        seen = False
        result = ''
        for c in p:
            if c == '#':
                if seen:
                    continue
                seen = True
            else:
                seen = False
            result = result + c
        return result
    patterns = patterns.split(';')
    result = []
    for pattern in patterns:
        pattern = skip_repeating_pattern(pattern)
        pattern = pattern.replace('#', "%1")
        # according to http://www.unicode.org/reports/tr35/#Number_Format_Patterns
        # there can be doubled or trippled currency sign, however none of the
        # locales use that.
        pattern = pattern.replace(u'\xa4', "%2")
        pattern = pattern.replace("''", "###").replace("'", '').replace("###", "'")
        pattern = pattern.replace('-', data['minus'])
        pattern = pattern.replace('+', data['plus'])
        result.append(pattern)
    return result

def parse_list_pattern_part_format(pattern):
    # This is a very limited parsing of the format for list pattern part only.
    return pattern.replace("{0}", "%1").replace("{1}", "%2").replace("{2}", "%3")

def unit_quantifiers(find, path, stem, suffix, known,
                     # Stop at exa/exbi: 16 exbi = 2^{64} < zetta =
                     # 1000^7 < zebi = 2^{70}, the next quantifiers up:
                     si_quantifiers = ('kilo', 'mega', 'giga', 'tera', 'peta', 'exa')):
    """Work out the unit quantifiers.

    Unfortunately, the CLDR data only go up to terabytes and we want
    all the way to exabytes; but we can recognize the SI quantifiers
    as prefixes, strip and identify the tail as the localized
    translation for 'B' (e.g. French has 'octet' for 'byte' and uses
    ko, Mo, Go, To from which we can extrapolate Po, Eo).

    Should be called first for the SI quantifiers, with suffix = 'B',
    then for the IEC ones, with suffix = 'iB'; the list known
    (initially empty before first call) is used to let the second call
    know what the first learned about the localized unit.
    """
    if suffix == 'B': # first call, known = []
        tail = suffix
        for q in si_quantifiers:
            it = find(path, stem % q)
            # kB for kilobyte, in contrast with KiB for IEC:
            q = q[0] if q == 'kilo' else q[0].upper()
            if not it:
                it = q + tail
            elif it.startswith(q):
                rest = it[1:]
                tail = rest if all(rest == k for k in known) else suffix
                known.append(rest)
            yield it
    else: # second call, re-using first's known
        assert suffix == 'iB'
        if known:
            byte = known.pop()
            if all(byte == k for k in known):
                suffix = 'i' + byte
        for q in si_quantifiers:
            yield find(path, stem % q[:2],
                       # Those don't (yet, v31) exist in CLDR, so we always fall back to:
                       q[0].upper() + suffix)

def generateLocaleInfo(path):
    if not path.endswith(".xml"):
        return {}

    # skip legacy/compatibility ones
    alias = findAlias(path)
    if alias:
        raise xpathlite.Error('alias to "%s"' % alias)

    def code(tag):
        return findEntryInFile(path, 'identity/' + tag, attribute="type")[0]

    return _generateLocaleInfo(path, code('language'), code('script'),
                               code('territory'), code('variant'))

def getNumberSystems(cache={}):
    """Cached look-up of number system information.

    Pass no arguments.  Returns a mapping from number system names to,
    for each system, a mapping with keys u'digits', u'type' and
    u'id'\n"""
    if not cache:
        for ns in findTagsInFile(os.path.join(cldr_dir, '..', 'supplemental',
                                              'numberingSystems.xml'),
                                 'numberingSystems'):
            # ns has form: [u'numberingSystem', [(u'digits', u'0123456789'), (u'type', u'numeric'), (u'id', u'latn')]]
            entry = dict(ns[1])
            name = entry[u'id']
            if u'digits' in entry and ord(entry[u'digits'][0]) > 0xffff:
                # FIXME: make this redundant:
                # omit number system if zero doesn't fit in single-char16 UTF-16 :-(
                sys.stderr.write('skipping number system "%s" [can\'t represent its zero, U+%X, QTBUG-69324]\n'
                                 % (name, ord(entry[u'digits'][0])))
            else:
                cache[name] = entry
    return cache

def _generateLocaleInfo(path, language_code, script_code, country_code, variant_code=""):
    if not path.endswith(".xml"):
        return {}

    if language_code == 'root':
        # just skip it
        return {}

    # we do not support variants
    # ### actually there is only one locale with variant: en_US_POSIX
    #     does anybody care about it at all?
    if variant_code:
        raise xpathlite.Error('we do not support variants ("%s")' % variant_code)

    language_id = enumdata.languageCodeToId(language_code)
    if language_id <= 0:
        raise xpathlite.Error('unknown language code "%s"' % language_code)

    script_id = enumdata.scriptCodeToId(script_code)
    if script_id == -1:
        raise xpathlite.Error('unknown script code "%s"' % script_code)

    # we should handle fully qualified names with the territory
    if not country_code:
        return {}
    country_id = enumdata.countryCodeToId(country_code)
    if country_id <= 0:
        raise xpathlite.Error('unknown country code "%s"' % country_code)

    # So we say we accept only those values that have "contributed" or
    # "approved" resolution. see http://www.unicode.org/cldr/process.html
    # But we only respect the resolution for new datas for backward
    # compatibility.
    draft = DraftResolution.contributed

    result = dict(
        language=enumdata.language_list[language_id][0],
        language_code=language_code, language_id=language_id,
        script=enumdata.script_list[script_id][0],
        script_code=script_code, script_id=script_id,
        country=enumdata.country_list[country_id][0],
        country_code=country_code, country_id=country_id,
        variant_code=variant_code)

    (dir_name, file_name) = os.path.split(path)
    def from_supplement(tag,
                        path=os.path.join(dir_name, '..', 'supplemental',
                                          'supplementalData.xml')):
        return findTagsInFile(path, tag)
    currencies = from_supplement('currencyData/region[iso3166=%s]' % country_code)
    result['currencyIsoCode'] = ''
    result['currencyDigits'] = 2
    result['currencyRounding'] = 1
    if currencies:
        for e in currencies:
            if e[0] == 'currency':
                t = [x[1] == 'false' for x in e[1] if x[0] == 'tender']
                if t and t[0]:
                    pass
                elif not any(x[0] == 'to' for x in e[1]):
                    result['currencyIsoCode'] = (x[1] for x in e[1] if x[0] == 'iso4217').next()
                    break
        if result['currencyIsoCode']:
            t = from_supplement("currencyData/fractions/info[iso4217=%s]"
                                % result['currencyIsoCode'])
            if t and t[0][0] == 'info':
                result['currencyDigits'] = (int(x[1]) for x in t[0][1] if x[0] == 'digits').next()
                result['currencyRounding'] = (int(x[1]) for x in t[0][1] if x[0] == 'rounding').next()
    numbering_system = None
    try:
        numbering_system = findEntry(path, "numbers/defaultNumberingSystem")
    except:
        pass
    def findEntryDef(path, xpath, value=''):
        try:
            return findEntry(path, xpath)
        except xpathlite.Error:
            return value
    def get_number_in_system(path, xpath, numbering_system):
        if numbering_system:
            try:
                return findEntry(path, xpath + "[numberSystem=" + numbering_system + "]")
            except xpathlite.Error:
                # in CLDR 1.9 number system was refactored for numbers (but not for currency)
                # so if previous findEntry doesn't work we should try this:
                try:
                    return findEntry(path, xpath.replace("/symbols/", "/symbols[numberSystem=" + numbering_system + "]/"))
                except xpathlite.Error:
                    # fallback to default
                    pass
        return findEntry(path, xpath)

    result['decimal'] = get_number_in_system(path, "numbers/symbols/decimal", numbering_system)
    result['group'] = get_number_in_system(path, "numbers/symbols/group", numbering_system)
    result['list'] = get_number_in_system(path, "numbers/symbols/list", numbering_system)
    result['percent'] = get_number_in_system(path, "numbers/symbols/percentSign", numbering_system)
    try:
        result['zero'] = getNumberSystems()[numbering_system][u"digits"][0]
    except Exception as e:
        sys.stderr.write("Native zero detection problem: %s\n" % repr(e))
        result['zero'] = get_number_in_system(path, "numbers/symbols/nativeZeroDigit", numbering_system)
    result['minus'] = get_number_in_system(path, "numbers/symbols/minusSign", numbering_system)
    result['plus'] = get_number_in_system(path, "numbers/symbols/plusSign", numbering_system)
    result['exp'] = get_number_in_system(path, "numbers/symbols/exponential", numbering_system).lower()
    result['quotationStart'] = findEntry(path, "delimiters/quotationStart")
    result['quotationEnd'] = findEntry(path, "delimiters/quotationEnd")
    result['alternateQuotationStart'] = findEntry(path, "delimiters/alternateQuotationStart")
    result['alternateQuotationEnd'] = findEntry(path, "delimiters/alternateQuotationEnd")
    result['listPatternPartStart'] = parse_list_pattern_part_format(findEntry(path, "listPatterns/listPattern/listPatternPart[start]"))
    result['listPatternPartMiddle'] = parse_list_pattern_part_format(findEntry(path, "listPatterns/listPattern/listPatternPart[middle]"))
    result['listPatternPartEnd'] = parse_list_pattern_part_format(findEntry(path, "listPatterns/listPattern/listPatternPart[end]"))
    result['listPatternPartTwo'] = parse_list_pattern_part_format(findEntry(path, "listPatterns/listPattern/listPatternPart[2]"))
    result['am'] = findEntry(path, "dates/calendars/calendar[gregorian]/dayPeriods/dayPeriodContext[format]/dayPeriodWidth[wide]/dayPeriod[am]", draft)
    result['pm'] = findEntry(path, "dates/calendars/calendar[gregorian]/dayPeriods/dayPeriodContext[format]/dayPeriodWidth[wide]/dayPeriod[pm]", draft)
    result['longDateFormat'] = convert_date(findEntry(path, "dates/calendars/calendar[gregorian]/dateFormats/dateFormatLength[full]/dateFormat/pattern"))
    result['shortDateFormat'] = convert_date(findEntry(path, "dates/calendars/calendar[gregorian]/dateFormats/dateFormatLength[short]/dateFormat/pattern"))
    result['longTimeFormat'] = convert_date(findEntry(path, "dates/calendars/calendar[gregorian]/timeFormats/timeFormatLength[full]/timeFormat/pattern"))
    result['shortTimeFormat'] = convert_date(findEntry(path, "dates/calendars/calendar[gregorian]/timeFormats/timeFormatLength[short]/timeFormat/pattern"))

    endonym = None
    if country_code and script_code:
        endonym = findEntryDef(path, "localeDisplayNames/languages/language[type=%s_%s_%s]" % (language_code, script_code, country_code))
    if not endonym and script_code:
        endonym = findEntryDef(path, "localeDisplayNames/languages/language[type=%s_%s]" % (language_code, script_code))
    if not endonym and country_code:
        endonym = findEntryDef(path, "localeDisplayNames/languages/language[type=%s_%s]" % (language_code, country_code))
    if not endonym:
        endonym = findEntryDef(path, "localeDisplayNames/languages/language[type=%s]" % (language_code))
    result['language_endonym'] = endonym
    result['country_endonym'] = findEntryDef(path, "localeDisplayNames/territories/territory[type=%s]" % (country_code))

    currency_format = get_number_in_system(path, "numbers/currencyFormats/currencyFormatLength/currencyFormat/pattern", numbering_system)
    currency_format = parse_number_format(currency_format, result)
    result['currencyFormat'] = currency_format[0]
    result['currencyNegativeFormat'] = ''
    if len(currency_format) > 1:
        result['currencyNegativeFormat'] = currency_format[1]

    result['currencySymbol'] = ''
    result['currencyDisplayName'] = ''
    if result['currencyIsoCode']:
        result['currencySymbol'] = findEntryDef(path, "numbers/currencies/currency[%s]/symbol" % result['currencyIsoCode'])
        result['currencyDisplayName'] = ';'.join(
            findEntryDef(path, 'numbers/currencies/currency[' + result['currencyIsoCode']
                         + ']/displayName' + tail)
            for tail in ['',] + [
                '[count=%s]' % x for x in ('zero', 'one', 'two', 'few', 'many', 'other')
                ]) + ';'

    def findUnitDef(path, stem, fallback=''):
        # The displayName for a quantified unit in en.xml is kByte
        # instead of kB (etc.), so prefer any unitPattern provided:
        for count in ('many', 'few', 'two', 'other', 'zero', 'one'):
            try:
                ans = findEntry(path, stem + 'unitPattern[count=%s]' % count)
            except xpathlite.Error:
                continue

            # TODO: epxloit count-handling, instead of discarding placeholders
            if ans.startswith('{0}'):
                ans = ans[3:].lstrip()
            if ans:
                return ans

        return findEntryDef(path, stem + 'displayName', fallback)

    # First without quantifier, then quantified each way:
    result['byte_unit'] = findEntryDef(
        path, 'units/unitLength[type=long]/unit[type=digital-byte]/displayName',
        'bytes')
    stem = 'units/unitLength[type=short]/unit[type=digital-%sbyte]/'
    known = [] # cases where we *do* have a given version:
    result['byte_si_quantified'] = ';'.join(unit_quantifiers(findUnitDef, path, stem, 'B', known))
    # IEC 60027-2
    # http://physics.nist.gov/cuu/Units/binary.html
    result['byte_iec_quantified'] = ';'.join(unit_quantifiers(findUnitDef, path, stem % '%sbi', 'iB', known))

    # Used for month and day data:
    namings = (
        ('standaloneLong', 'stand-alone', 'wide'),
        ('standaloneShort', 'stand-alone', 'abbreviated'),
        ('standaloneNarrow', 'stand-alone', 'narrow'),
        ('long', 'format', 'wide'),
        ('short', 'format', 'abbreviated'),
        ('narrow', 'format', 'narrow'),
        )

    # Month data:
    for cal in ('gregorian',): # We shall want to add to this
        stem = 'dates/calendars/calendar[' + cal + ']/months/'
        for (key, mode, size) in namings:
            prop = 'monthContext[' + mode + ']/monthWidth[' + size + ']/'
            result[key + 'Months'] = ';'.join(
                findEntry(path, stem + prop + "month[%d]" % i)
                for i in range(1, 13)) + ';'

    # Day data (for Gregorian, at least):
    stem = 'dates/calendars/calendar[gregorian]/days/'
    days = ('sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat')
    for (key, mode, size) in namings:
        prop = 'dayContext[' + mode + ']/dayWidth[' + size + ']/day'
        result[key + 'Days'] = ';'.join(
            findEntry(path, stem + prop + '[' + day + ']')
            for day in days) + ';'

    return Locale(result)

def addEscapes(s):
    result = ''
    for c in s:
        n = ord(c)
        if n < 128:
            result += c
        else:
            result += "\\x"
            result += "%02x" % (n)
    return result

def unicodeStr(s):
    utf8 = s.encode('utf-8')
    return "<size>" + str(len(utf8)) + "</size><data>" + addEscapes(utf8) + "</data>"

def usage():
    print "Usage: cldr2qlocalexml.py <path-to-cldr-main>"
    sys.exit()

def integrateWeekData(filePath):
    if not filePath.endswith(".xml"):
        return {}

    def lookup(key):
        return findEntryInFile(filePath, key, attribute='territories')[0].split()
    days = ('mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun')

    firstDayByCountryCode = {}
    for day in days:
        for countryCode in lookup('weekData/firstDay[day=%s]' % day):
            firstDayByCountryCode[countryCode] = day

    weekendStartByCountryCode = {}
    for day in days:
        for countryCode in lookup('weekData/weekendStart[day=%s]' % day):
            weekendStartByCountryCode[countryCode] = day

    weekendEndByCountryCode = {}
    for day in days:
        for countryCode in lookup('weekData/weekendEnd[day=%s]' % day):
            weekendEndByCountryCode[countryCode] = day

    for (key, locale) in locale_database.iteritems():
        countryCode = locale.country_code
        if countryCode in firstDayByCountryCode:
            locale.firstDayOfWeek = firstDayByCountryCode[countryCode]
        else:
            locale.firstDayOfWeek = firstDayByCountryCode["001"]

        if countryCode in weekendStartByCountryCode:
            locale.weekendStart = weekendStartByCountryCode[countryCode]
        else:
            locale.weekendStart = weekendStartByCountryCode["001"]

        if countryCode in weekendEndByCountryCode:
            locale.weekendEnd = weekendEndByCountryCode[countryCode]
        else:
            locale.weekendEnd = weekendEndByCountryCode["001"]

if len(sys.argv) != 2:
    usage()

cldr_dir = sys.argv[1]

if not os.path.isdir(cldr_dir):
    usage()

cldr_files = os.listdir(cldr_dir)

locale_database = {}

# see http://www.unicode.org/reports/tr35/tr35-info.html#Default_Content
defaultContent_locales = {}
for ns in findTagsInFile(os.path.join(cldr_dir, '..', 'supplemental',
                                      'supplementalMetadata.xml'),
                         'metadata/defaultContent'):
    for data in ns[1:][0]:
        if data[0] == u"locales":
            defaultContent_locales = data[1].split()

for file in defaultContent_locales:
    items = file.split("_")
    if len(items) == 3:
        language_code = items[0]
        script_code = items[1]
        country_code = items[2]
    else:
        if len(items) != 2:
            sys.stderr.write('skipping defaultContent locale "' + file + '" [neither lang_script_country nor lang_country]\n')
            continue
        language_code = items[0]
        script_code = ""
        country_code = items[1]
        if len(country_code) == 4:
            sys.stderr.write('skipping defaultContent locale "' + file + '" [long country code]\n')
            continue
    try:
        l = _generateLocaleInfo(cldr_dir + "/" + file + ".xml", language_code, script_code, country_code)
        if not l:
            sys.stderr.write('skipping defaultContent locale "' + file + '" [no locale info generated]\n')
            continue
    except xpathlite.Error as e:
        sys.stderr.write('skipping defaultContent locale "%s" (%s)\n' % (file, str(e)))
        continue

    locale_database[(l.language_id, l.script_id, l.country_id, l.variant_code)] = l

for file in cldr_files:
    try:
        l = generateLocaleInfo(cldr_dir + "/" + file)
        if not l:
            sys.stderr.write('skipping file "' + file + '" [no locale info generated]\n')
            continue
    except xpathlite.Error as e:
        sys.stderr.write('skipping file "%s" (%s)\n' % (file, str(e)))
        continue

    locale_database[(l.language_id, l.script_id, l.country_id, l.variant_code)] = l

integrateWeekData(cldr_dir+"/../supplemental/supplementalData.xml")
locale_keys = locale_database.keys()
locale_keys.sort()

cldr_version = 'unknown'
ldml = open(cldr_dir+"/../dtd/ldml.dtd", "r")
for line in ldml:
    if 'version cldrVersion CDATA #FIXED' in line:
        cldr_version = line.split('"')[1]

print "<localeDatabase>"
print "    <version>" + cldr_version + "</version>"
print "    <languageList>"
for id in enumdata.language_list:
    l = enumdata.language_list[id]
    print "        <language>"
    print "            <name>" + l[0] + "</name>"
    print "            <id>" + str(id) + "</id>"
    print "            <code>" + l[1] + "</code>"
    print "        </language>"
print "    </languageList>"

print "    <scriptList>"
for id in enumdata.script_list:
    l = enumdata.script_list[id]
    print "        <script>"
    print "            <name>" + l[0] + "</name>"
    print "            <id>" + str(id) + "</id>"
    print "            <code>" + l[1] + "</code>"
    print "        </script>"
print "    </scriptList>"

print "    <countryList>"
for id in enumdata.country_list:
    l = enumdata.country_list[id]
    print "        <country>"
    print "            <name>" + l[0] + "</name>"
    print "            <id>" + str(id) + "</id>"
    print "            <code>" + l[1] + "</code>"
    print "        </country>"
print "    </countryList>"

def _parseLocale(l):
    language = "AnyLanguage"
    script = "AnyScript"
    country = "AnyCountry"

    if l == "und":
        raise xpathlite.Error("we are treating unknown locale like C")

    items = l.split("_")
    language_code = items[0]
    if language_code != "und":
        language_id = enumdata.languageCodeToId(language_code)
        if language_id == -1:
            raise xpathlite.Error('unknown language code "%s"' % language_code)
        language = enumdata.language_list[language_id][0]

    if len(items) > 1:
        script_code = items[1]
        country_code = ""
        if len(items) > 2:
            country_code = items[2]
        if len(script_code) == 4:
            script_id = enumdata.scriptCodeToId(script_code)
            if script_id == -1:
                raise xpathlite.Error('unknown script code "%s"' % script_code)
            script = enumdata.script_list[script_id][0]
        else:
            country_code = script_code
        if country_code:
            country_id = enumdata.countryCodeToId(country_code)
            if country_id == -1:
                raise xpathlite.Error('unknown country code "%s"' % country_code)
            country = enumdata.country_list[country_id][0]

    return (language, script, country)

print "    <likelySubtags>"
for ns in findTagsInFile(cldr_dir + "/../supplemental/likelySubtags.xml", "likelySubtags"):
    tmp = {}
    for data in ns[1:][0]: # ns looks like this: [u'likelySubtag', [(u'from', u'aa'), (u'to', u'aa_Latn_ET')]]
        tmp[data[0]] = data[1]

    try:
        (from_language, from_script, from_country) = _parseLocale(tmp[u"from"])
    except xpathlite.Error as e:
        sys.stderr.write('skipping likelySubtag "%s" -> "%s" (%s)\n' % (tmp[u"from"], tmp[u"to"], str(e)))
        continue
    try:
        (to_language, to_script, to_country) = _parseLocale(tmp[u"to"])
    except xpathlite.Error as e:
        sys.stderr.write('skipping likelySubtag "%s" -> "%s" (%s)\n' % (tmp[u"from"], tmp[u"to"], str(e)))
        continue
    # substitute according to http://www.unicode.org/reports/tr35/#Likely_Subtags
    if to_country == "AnyCountry" and from_country != to_country:
        to_country = from_country
    if to_script == "AnyScript" and from_script != to_script:
        to_script = from_script

    print "        <likelySubtag>"
    print "            <from>"
    print "                <language>" + from_language + "</language>"
    print "                <script>" + from_script + "</script>"
    print "                <country>" + from_country + "</country>"
    print "            </from>"
    print "            <to>"
    print "                <language>" + to_language + "</language>"
    print "                <script>" + to_script + "</script>"
    print "                <country>" + to_country + "</country>"
    print "            </to>"
    print "        </likelySubtag>"
print "    </likelySubtags>"

print "    <localeList>"

Locale.C().toXml()
for key in locale_keys:
    locale_database[key].toXml()

print "    </localeList>"
print "</localeDatabase>"