from accounts.models import User
import random
import string

def random_pass():
    digits = random.sample(('0', '1', '2', '3', '4', '5', '6', '7', '8', '9'), 4)
    chars = random.sample(string.lowercase[:], 4)
    password = chars + digits
    random.shuffle(password)
    return  ''.join(password)


def load_user(strategy, details, response, uid, *args, **kwargs):
    user = None
    if details.get('email'):
        email = details.get('email')
        user = User.objects.safe_get(email=email)

    return {'user': user, 'is_new': False}

from django.contrib.sites.models import Site, RequestSite
from registration.models import RegistrationProfile


def create_user(strategy, details, response, uid, user=None, *args, **kwargs):
    if user:
        return {'user': user, 'is_new': False}
    else:
        request = strategy.request
        if Site._meta.installed:
            site = Site.objects.get_current()
        else:
            site = RequestSite(request)
        new_user = RegistrationProfile.objects.create_inactive_user(details['first_name'], details['last_name'], details['email'],
                                                            random_pass(), site or 1)
        signals.user_registered.send(sender=User, user=new_user, request=request)
        #user = User.objects.create_social_user(username, details['first_name'], details['last_name'])
        return {'user': new_user, 'is_new': True}



from django.shortcuts import redirect
from social.pipeline.partial import partial
from registration import signals

@partial
def require_email(strategy, details, user=None, is_new=False, *args, **kwargs):
    if user and user.email:
        return
    elif is_new and not details.get('email'):
        email = strategy.request_data().get('email')
        if email:
            details['email'] = email
        else:
            strategy.request.session['new_email'] = True
            return redirect('acquire_email')






from django.core import signing
from django.core.mail import EmailMultiAlternatives
from django.conf import settings
from django.core.urlresolvers import reverse

def SendVerificationEmail(strategy, backend, code):
    """
    Send an email with an embedded verification code and the necessary details to restore the required session
    elements to complete the verification and sign-in, regardless of what browser the user completes the
    verification from.
    """
    signature = signing.dumps({"session_key": strategy.session.session_key, "email": code.email},
                              key=settings.EMAIL_SECRET_KEY)
    verifyURL = "{0}?verification_code={1}&signature={2}".format(
        reverse('social:complete', args=(backend.name,)),
        code.code, signature)
    verifyURL = strategy.request.build_absolute_uri(verifyURL)

    emailHTML = ''# Include your function that returns an html string here
    emailText = """Welcome to Expomap.ru!
In order to login with your new user account, you need to verify your email address with us.
Please click on <a href='{verifyURL}'>this link</a> to continue registration.
""".format(verifyURL=verifyURL)

    kwargs = {
        "subject": "Verify Your Account",
        "body": emailText,
        "from_email": settings.CALLBACK_EMAIL,
        "to": [code.email],
    }

    email = EmailMultiAlternatives(**kwargs)
    email.attach_alternative(emailHTML, "text/html")
    email.send()