from django.core.validators import RegexValidator
from django.db import models
from django.utils.crypto import get_random_string


def get_random_phone():
    return '07'+ get_random_string(length=8, allowed_chars='123456789')
    
phone_pattern_validator = RegexValidator('(0|\+213|00213){1}([1-9]){1}([0-9]{8})', message='Invalid phone format')

phone = models.CharField(
    max_length=16, unique=True, default=get_random_phone, blank=True, validators=[phone_pattern_validator,]
)