# -*- coding: utf-8 -*-

from __future__ import unicode_literals
import re

from django.utils.translation import ugettext_lazy as _
from django.forms import fields
from django.db import models

MAC_RE = r"^([0-9a-fA-F]{2}([:-]?|$)){6}$"
mac_re = re.compile(MAC_RE)


class MACAddressFormField(fields.RegexField):
    default_error_messages = {"invalid": _("Enter a valid MAC address.")}

    def __init__(self, *args, **kwargs):
        super(MACAddressFormField, self).__init__(mac_re, *args, **kwargs)


class MACAddressField(models.Field):
    empty_strings_allowed = False

    def __init__(self, *args, **kwargs):
        kwargs["max_length"] = 17
        super(MACAddressField, self).__init__(*args, **kwargs)

    def get_internal_type(self):
        return "CharField"

    def formfield(self, **kwargs):
        defaults = {"form_class": MACAddressFormField}
        defaults.update(kwargs)
        return super(MACAddressField, self).formfield(**defaults)

    # def get_db_prep_value(self, value, *args, **kwargs):
    #     return filter(lambda ch: ch not in ':-', value).upper()