from flask import current_app
from flask_wtf import FlaskForm
from .form.auth import PasswordForm
from hmac import compare_digest as compare_hash
import crypt
from .model import User
import logging
from abc import ABC, abstractclassmethod, abstractmethod


logger = logging.getLogger(__name__)



class AuthProvider(ABC):

    @classmethod
    def get_name(cls):
        return cls.__name__

    @staticmethod
    @abstractmethod
    def get_form() -> FlaskForm:
        ...

    @staticmethod
    def check_auth(user: User, form) -> bool:
        '''
        checks the submited form is valid
        return true if user is allowed to auth
        '''
        return False


class PasswordAuthProvider(AuthProvider):

    @staticmethod
    def get_form() -> FlaskForm:
        return PasswordForm(prefix='password')

    @staticmethod
    def check_auth(user: User, form: FlaskForm) -> bool:
        if isinstance(form.data['password'], str):
            return PasswordAuthProvider.check_auth_internal(user, form.data['password'])
        else:
            return False
    @staticmethod
    def check_auth_internal(user: User, password: str) -> bool:
        return compare_hash(crypt.crypt(password, user.password_hashed),user.password_hashed) 


AUTH_PROVIDER_LIST = [
    PasswordAuthProvider
]

#print(LdapAuthProvider.get_name())