"""Utils app method."""
import random
from django.http.request import HttpRequest
from rest_framework.request import Request
import re
from django.utils.timezone import datetime
from django.conf import settings


def generate_code(digits=6, string_output=True):
    """Generate random int."""
    max_value = 10 ** digits - 1
    min_value = 10 ** (digits - 1)
    value = random.randint(min_value, max_value)
    return str(value) if string_output else value


def get_token_from_request(request):
    """Get access token from request"""
    if 'Authorization' in request.headers:
        if isinstance(request, HttpRequest):
            return request.headers.get('Authorization').split(' ')[::-1][0]
        elif isinstance(request, Request):
            return request._request.headers.get('Authorization').split(' ')[::-1][0]


def username_validator(username: str) -> bool:
    """Validate given username"""
    pattern = r'[@,]+'
    if re.search(pattern=pattern, string=username):
        return False
    else:
        return True


def image_path(instance, filename):
    """Determine avatar path method."""
    filename = '%s.jpeg' % generate_code()
    return 'image/%s/%s/%s' % (
        instance._meta.model_name,
        datetime.now().strftime(settings.REST_DATE_FORMAT),
        filename)