from django.shortcuts import  redirect
from eventplanner_gcal.google_sync import syncFromGoogleToLocal, syncFromLocalToGoogle
from django.http import HttpResponse
from django.views.decorators.csrf import csrf_exempt
from pprint import pformat
from eventplanner_gcal.google_sync import checkIfGoogleCallbackIsValid
from eventplanner_gcal.models import UserGCalCoupling
from django.shortcuts import render

import logging

logger = logging.getLogger( __name__ )


def runSync( request ):
    syncFromLocalToGoogle()
    return redirect("/")


def manage( request ):

    if request.method == 'POST':
        if request.POST['activate'] == "1":
            UserGCalCoupling.objects.filter( user=request.user ).delete()
            c = UserGCalCoupling( user=request.user, email = request.POST['email'] )
            c.save()
            syncFromLocalToGoogle()
        else:
            UserGCalCoupling.objects.filter( user=request.user ).delete()
            syncFromLocalToGoogle()

    context = {}
    userCoupling = UserGCalCoupling.objects.filter( user = request.user )
    context['enabled'] = len(userCoupling)
    assert( len(userCoupling) < 2 )
    if len(userCoupling) == 1:
        context['mail'] = userCoupling[0].email

    return render( request, 'eventplanner_gcal/management.html', context )


@csrf_exempt
def gcalApiCallback( request ):
    # TODO check channel info here
    token = ""
    if 'HTTP_X_GOOG_CHANNEL_TOKEN' in request.META: token = request.META['HTTP_X_GOOG_CHANNEL_TOKEN']
    channelID = ""
    if 'HTTP_X_GOOG_CHANNEL_ID' in request.META: channelID = request.META['HTTP_X_GOOG_CHANNEL_ID']
    resourceID = ""
    if 'HTTP_X_GOOG_RESOURCE_ID' in request.META: resourceID = request.META['HTTP_X_GOOG_RESOURCE_ID']

    valid = checkIfGoogleCallbackIsValid( token, channelID, resourceID)

    if not valid:
        return HttpResponse('<h1>Old Channel - no update triggered</h1>')


    logger.info( "Received Google Callback with the following headers Token: %s ID %s ResID %s " % ( token, channelID, resourceID ) )
    result = syncFromGoogleToLocal()
    logger.info("Finished processing callback from GCal - New Information present: %d " %(result, ) )
    return HttpResponse('<h1>Callback successful</h1>')