from django.db.models.signals import post_save, pre_delete
from django.dispatch import receiver
from eventplanner.models import Event, EventParticipation
from eventplanner_gcal.google_sync import get_service_object, \
    create_gcal_event, delete_gcal_event, update_gcal_event, on_gcal_event_created

import logging
from django.conf import settings

logger = logging.getLogger(__name__)


# @receiver( post_save, sender=User )
# def user_changed( **kwargs ):
#    logger.info("Synchronizing with google - user information changed")
#    syncFromLocalToGoogle( getServiceObject() )


@receiver(post_save, sender=Event)
def event_post_save_handler(**kwargs):
    if not settings.GCAL_SYNC_ENABLED:
        return

    event = kwargs['instance']
    created = kwargs['created']
    try:
        if created:
            logger.info("Creating Gcal event")
            response = create_gcal_event(get_service_object(), event).execute()
            on_gcal_event_created(None, response, None)
        else:
            logger.info("Updating Gcal event")
            update_gcal_event(get_service_object(), event).execute()
    except Exception as e:
        logger.error("Error updating Gcal event" + str(e))


@receiver(pre_delete, sender=Event)
def event_pre_delete_handler(**kwargs):
    if not settings.GCAL_SYNC_ENABLED:
        return

    try:
        event = kwargs['instance']
        logger.info("Deleting Gcal event")
        delete_gcal_event(get_service_object(), event).execute()
    except Exception as e:
        logger.error("Error deleting GCAL event" + str(e))


@receiver(post_save, sender=EventParticipation)
def participation_post_save_handler(**kwargs):
    if not settings.GCAL_SYNC_ENABLED:
        return

    try:
        participation = kwargs['instance']
        logger.info("Participation post save -> update gcal")
        update_gcal_event(get_service_object(), participation.event).execute()
    except Exception as e:
        logger.error("Error deleting GCAL event" + str(e))