from django.contrib.auth import authenticate, login, logout as django_logout
from django.contrib.auth.models import User
from django.http import HttpResponse, HttpResponseRedirect
from django.shortcuts import render_to_response
from django.contrib.auth.decorators import login_required
from django.conf import settings
from django.core.urlresolvers import reverse

from twython import Twython

# If you've got your own Profile setup, see the note in the models file
# about adapting this to your own setup.
from twitter_favs.models import TwitterProfile

def logout(request, redirect_url=settings.LOGOUT_REDIRECT_URL):
    """
        Nothing hilariously hidden here, logs a user out. Strip this out if your
        application already has hooks to handle this.
    """
    django_logout(request)
    return HttpResponseRedirect(request.build_absolute_uri(redirect_url))

def begin_auth(request):
    """
        The view function that initiates the entire handshake.
        For the most part, this is 100% drag and drop.
    """
    # Instantiate Twython with the first leg of our trip.
    twitter = Twython(
        twitter_token = settings.TWITTER_KEY,
        twitter_secret = settings.TWITTER_SECRET,
        callback_url = request.build_absolute_uri(reverse('twitter_favs.views.thanks'))
    )

    # Request an authorization url to send the user to...
    auth_props = twitter.get_authentication_tokens()

    # Then send them over there, durh.
    request.session['request_token'] = auth_props
    return HttpResponseRedirect(auth_props['auth_url'])

def thanks(request, redirect_url=settings.LOGIN_REDIRECT_URL):
    """
        A user gets redirected here after hitting Twitter and authorizing your
        app to use their data.

        ***
            This is the view that stores the tokens you want
            for querying data. Pay attention to this.
        ***
    """
    # Now that we've got the magic tokens back from Twitter, we need to exchange
    # for permanent ones and store them...
    twitter = Twython(
        twitter_token = settings.TWITTER_KEY,
        twitter_secret = settings.TWITTER_SECRET,
        oauth_token = request.session['request_token']['oauth_token'],
        oauth_token_secret = request.session['request_token']['oauth_token_secret'],
    )

    # Retrieve the tokens we want...
    authorized_tokens = twitter.get_authorized_tokens()

    # If they already exist, grab them, login and redirect to a page displaying stuff.
    try:
        user = User.objects.get(username = authorized_tokens['screen_name'])
    except User.DoesNotExist:
        # We mock a creation here; no email, password is just the token, etc.
        user = User.objects.create_user(authorized_tokens['screen_name'], "fjdsfn@jfndjfn.com", authorized_tokens['oauth_token_secret'])
        profile = TwitterProfile()
        profile.user = user
        profile.oauth_token = authorized_tokens['oauth_token']
        profile.oauth_secret = authorized_tokens['oauth_token_secret']
        profile.save()

    user = authenticate(
        username = authorized_tokens['screen_name'],
        password = authorized_tokens['oauth_token_secret']
    )
    login(request, user)
    return HttpResponseRedirect(redirect_url)

def user_timeline(request):
    """
        An example view with Twython/OAuth hooks/calls to fetch data about the user
        in question. Pretty self explanatory if you read through it...
    """
    user = request.user.twitterprofile
    twitter = Twython(
        twitter_token = settings.TWITTER_KEY,
        twitter_secret = settings.TWITTER_SECRET,
        oauth_token = user.oauth_token,
        oauth_token_secret = user.oauth_secret
    )
    user_tweets = twitter.getHomeTimeline()
    return render_to_response('tweets.html', {'tweets': user_tweets})