from __future__ import unicode_literals
import logging

logger = logging.getLogger(__name__)


class NotificationHandler(logging.Handler):
    def emit(self, record):
        from django.contrib.auth.models import User, Permission
        from django.db.models import Q
        from notifications import notify
        from notifications.models import Notification

        try:
            perm = Permission.objects.get(codename="logging_notifications")

            message = record.getMessage()
            if record.exc_text:
                message += "\n\n"
                message = message + record.exc_text

            users = User.objects.filter(Q(groups__permissions=perm) | Q(user_permissions=perm) | Q(is_superuser=True)).distinct()

            for user in users:
                notify(
                    user,
                    "%s [%s:%s]" % (record.levelname, record.funcName, record.lineno),
                    level = str([item[0] for item in Notification.LEVEL_CHOICES if item[1] == record.levelname][0]),
                    message = message
                )
        except Permission.DoesNotExist:
            pass