from django.tasks import task
from django.utils import timezone

from email_sms.channels import dispatch_message
from email_sms.models import Message
from email_sms.services import contact_may_receive, refresh_campaign_status


@task
def send_campaign_message(message_id: str) -> None:
    campaign = None
    try:
        message = Message.objects.select_related("contact", "campaign").get(
            pk=message_id
        )
    except Message.DoesNotExist:
        return

    campaign = message.campaign

    if not contact_may_receive(message.contact, message.channel):
        message.status = Message.Status.SUPPRESSED
        message.error = "Contact opted out or suppressed"
        message.save(update_fields=["status", "error", "updated_at"])
        refresh_campaign_status(campaign)
        return

    try:
        result = dispatch_message(message)
        message.status = Message.Status.SENT
        message.provider = result.provider
        message.provider_message_id = result.provider_id
        message.sent_at = timezone.now()
        message.error = ""
        message.save(
            update_fields=[
                "status",
                "provider",
                "provider_message_id",
                "sent_at",
                "error",
                "updated_at",
            ]
        )
    except Exception as exc:  # noqa: BLE001 — persist provider failures
        message.status = Message.Status.FAILED
        message.error = str(exc)[:2000]
        message.save(update_fields=["status", "error", "updated_at"])
        refresh_campaign_status(campaign)
        raise

    refresh_campaign_status(campaign)