import requests
import logging

from django.conf import settings

from .base import BaseCaptcha

logger = logging.getLogger(__name__)


class Captcha(BaseCaptcha):
    """
    Refer: https://007.qq.com/captcha/guide.html#/gettingStart
    """

    # Defined by Tecent
    PASS_FLAG = '1'

    def __init__(self, *args, **kwargs):
        self.aid = getattr(settings, 'CAPTCHA_TECENT_APP_ID')
        self.app_secret_key = getattr(settings, 'CAPTCHA_TECENT_APP_SECRET')
        self.validate_url = 'https://ssl.captcha.qq.com/ticket/verify'
        return super(Captcha, self).__init__(*args, **kwargs)

    def generate(self, *args, **kwargs):
        # This captcha was generated by tecent it's self
        pass

    def verify(self, user, ip, ticket, randstr):
        if not (ticket and randstr):
            if user and not self._active_for_user(user):
                return True
            return False

        validate_data = {
            'aid': self.aid,
            'AppSecretKey': self.app_secret_key,
            'Ticket': ticket,
            'Randstr': randstr,
            'UserIP': ip,
        }
        try:
            res = requests.post(
                self.validate_url,
                data=validate_data,
                timeout=1
            )
            if res.json().get('response') == self.PASS_FLAG:
                return True
            else:
                return False
        except Exception as e:
            # Unreliable service from Tencent
            # For better experience, assume captcha valid.
            logger.warning(e)
            return True