# -*- coding: utf-8 -*-
# Part of Odoo, Flectra. See LICENSE file for full copyright and licensing details.

from flectra import _
from flectra.exceptions import UserError

import logging

_logger = logging.getLogger(__name__)
_phonenumbers_lib_warning = False


try:
    import phonenumbers

    def phone_parse(number, country_code):
        try:
            phone_nbr = phonenumbers.parse(number, region=country_code, keep_raw_input=True)
        except phonenumbers.phonenumberutil.NumberParseException as e:
            raise UserError(_('Unable to parse %s:\n%s') % (number, e))

        if not phonenumbers.is_possible_number(phone_nbr):
            raise UserError(_('Impossible number %s: probably invalid number of digits') % number)
        if not phonenumbers.is_valid_number(phone_nbr):
            raise UserError(_('Invalid number %s: probably incorrect prefix') % number)

        return phone_nbr

    def phone_format(number, country_code, country_phone_code, always_international=True, raise_exception=True):
        """ Format the given phone number according to the localisation and international options.
            :param number: number to convert
            :param country_code: the ISO country code in two chars
            :type country_code: str
            :param country_phone_code: country dial in codes, defined by the ITU-T (Ex: 32 for Belgium)
            :type country_phone_code: int
            :rtype: str
        """
        try:
            phone_nbr = phone_parse(number, country_code)
        except (phonenumbers.phonenumberutil.NumberParseException, UserError) as e:
            if raise_exception:
                raise
            else:
                _logger.warning(_('Unable to format %s:\n%s') % number, e)
                return number
        if always_international and phone_nbr.country_code != country_phone_code:
            phone_fmt = phonenumbers.PhoneNumberFormat.INTERNATIONAL
        else:
            phone_fmt = phonenumbers.PhoneNumberFormat.NATIONAL

        return phonenumbers.format_number(phone_nbr, phone_fmt)

except ImportError:

    def phone_parse(number, country_code):
        return False

    def phone_format(number, country_code, country_phone_code, always_international=True, raise_exception=True):
        global _phonenumbers_lib_warning
        if not _phonenumbers_lib_warning:
            _logger.warning(
                "The `phonenumbers` Python module is not installed, contact numbers will not be "
                "verified. Please install the `phonenumbers` Python module."
            )
            _phonenumbers_lib_warning = True
        return number