"""

FR-specific Form helpers

"""

from django.forms import ValidationError

from django.forms.fields import Field, RegexField, Select, EMPTY_VALUES

from django.utils.encoding import smart_unicode

from django.utils.translation import ugettext_lazy as _

import re

phone_digits_re = re.compile(r'^0\d(\s|\.)?(\d{2}(\s|\.)?){3}\d{2}$')

class FRZipCodeField(RegexField):

    default_error_messages = {

        'invalid': _('Enter a zip code in the format XXXXX.'),

    }

    def __init__(self, *args, **kwargs):

        super(FRZipCodeField, self).__init__(r'^\d{5}$',

            max_length=None, min_length=None, *args, **kwargs)

class FRPhoneNumberField(Field):

    """

    Validate local French phone number (not international ones)

    The correct format is '0X XX XX XX XX'.

    '0X.XX.XX.XX.XX' and '0XXXXXXXXX' validate but are corrected to

    '0X XX XX XX XX'.

    """

    default_error_messages = {

        'invalid': u'Phone numbers must be in 0X XX XX XX XX format.',

    }

    def clean(self, value):

        super(FRPhoneNumberField, self).clean(value)

        if value in EMPTY_VALUES:

            return u''

        value = re.sub('(\.|\s)', '', smart_unicode(value))

        m = phone_digits_re.search(value)

        if m:

            return u'%s %s %s %s %s' % (value[0:2], value[2:4], value[4:6], value[6:8], value[8:10])

        raise ValidationError(self.error_messages['invalid'])

class FRDepartmentSelect(Select):

    """

    A Select widget that uses a list of FR departments as its choices.

    """

    def __init__(self, attrs=None):

        from fr_department import DEPARTMENT_ASCII_CHOICES

        super(FRDepartmentSelect, self).__init__(attrs, choices=DEPARTMENT_ASCII_CHOICES)