from django.contrib.auth.backends import BaseBackend

from accounts.models import User


class EmailWerkzeugBackend(BaseBackend):
    """Autenticação por e-mail com hash Werkzeug (compatível com banco migrado do Flask)."""

    def authenticate(self, request, username=None, password=None, **kwargs):
        email = kwargs.get("email") or username
        if not email or not password:
            return None
        try:
            user = User.objects.get(email=email.lower().strip())
        except User.DoesNotExist:
            return None
        if user.check_password(password):
            return user
        return None

    def get_user(self, user_id):
        try:
            return User.objects.get(pk=user_id)
        except User.DoesNotExist:
            return None