import logging

from django.core.exceptions import ValidationError

logger = logging.getLogger("bornhack.%s" % __name__)


def check_speaker_event_camp_consistency(sender, instance, **kwargs):
    if kwargs["action"] == "pre_add":
        from program.models import Speaker, Event

        if isinstance(instance, Event):
            # loop over speakers being added to this event
            for pk in kwargs["pk_set"]:
                # check if this speaker belongs to a different Camp than the event does
                speaker = Speaker.objects.get(id=pk)
                if speaker.camp != instance.camp:
                    raise ValidationError(
                        {
                            "speakers": "The speaker (%s) belongs to a different camp (%s) than the event does (%s)"
                            % (speaker, speaker.camp, instance.camp)
                        }
                    )
        elif isinstance(instance, Speaker):
            # loop over events being added to this speaker
            for pk in kwargs["pk_set"]:
                # check if this event belongs to a different Camp than the speaker does
                event = Event.objects.get(id=pk)
                if event.camp != instance.camp:
                    raise ValidationError(
                        {
                            "events": f"The event ({event}) belongs to a different camp ({event.camp}) than the speaker does ({instance.camp})"
                        }
                    )


def event_session_post_save(sender, instance, created, **kwargs):
    """ Make sure we have the number of EventSlots we need to have, adjust if not """
    instance.fixup_event_slots()