from django.db import models
from django.utils import timezone


class OutboxMessage(models.Model):
    queue = models.TextField()
    body = models.JSONField()
    time_created = models.DateTimeField(default=timezone.now)
    time_sent = models.DateTimeField(null=True, default=None)
    time_received = models.DateTimeField(null=True, default=None)
    time_processed = models.DateTimeField(null=True, default=None)

    class Meta:
        indexes = [
            models.Index(fields=['time_sent']),
            models.Index(fields=['time_sent', 'time_processed'])
        ]