from django.core.exceptions import ValidationError
from django.utils.translation import gettext as _
import re


class UppercaseValidator(object):
    def validate(self, password, user=None):
        if not re.findall('[A-Z]', password):
            raise ValidationError(
                _("The password must contain at least 1 uppercase letter (A-Z)."))

    def get_help_text(self):
        return _("Your password must contain at least 1 uppercase letter (A-Z).")


class LowercaseValidator(object):
    def validate(self, password, user=None):
        if not re.findall('[a-z]', password):
            raise ValidationError(
                _("The password must contain at least 1 lowercase letter (a-z)."))

    def get_help_text(self):
        return _("Your password must contain at least 1 lowercase letter (a-z).")


class SpecialCharacterValidator(object):
    def validate(self, password, user=None):
        if not re.findall('[@#$%^&*()_+/\<>;:!?]', password):
            raise ValidationError(
                _("The password must contain at least 1 special character (@, #, $, etc.)."))

    def get_help_text(self):
        return _("Your password must contain at least 1 special character (@, #, $, etc.).")


class NumberValidator(object):
    def validate(self, password, user=None):
        if not any(char.isdigit() for char in password):
            raise ValidationError(
                _("The password must contain at least one numerical digit (0-9)."))

    def get_help_text(self):
        return _("Your password must contain at least numerical digit (0-9).")