import logging
from typing import Any, Dict

from celery import shared_task

logger = logging.getLogger("celery_tasks")
if not logger.handlers:
    _h = logging.StreamHandler()
    logger.addHandler(_h)
logger.setLevel(logging.INFO)


@shared_task(name="workers.send_email")
def send_email(payload: Dict[str, Any]) -> None:
    """Celery task to send an email.

    Expected payload schema:
    {
        "type": "email",
        "to": "recipient@example.com",
        "subject": "Subject text",
        "body": "Email body text"
    }

    This mirrors the previous queue worker contract to minimize changes upstream.
    """
    to = payload.get("to")
    subject = payload.get("subject")
    body = payload.get("body")
    if not (to and subject and body):
        logger.error("Email task missing fields. Payload: %s", payload)
        return

    # Placeholder for real email sending logic
    # Implement SMTP provider call here
    logger.info("[Celery] Email sent | to=%s | subject=%s | body_len=%d", to, subject, len(body))


@shared_task(name="workers.send_email_fields")
def send_email_fields(to: str, subject: str, body: str) -> None:
    """Alternate signature for convenience when calling from app code.
    Routes to the same implementation as send_email.
    """
    send_email({"type": "email", "to": to, "subject": subject, "body": body})