import logging
from fastapi import APIRouter, Depends, HTTPException

from ..models.notification import ExternalNotificationRequest
from ..services.notification_manager import NotificationManagerService
from ..dependencies import get_notification_manager


logger = logging.getLogger(__name__)
router = APIRouter(prefix="/api/v1/dialogflow", tags=["notifications"])


@router.post("/notification", status_code=200)
async def process_notification(
    request: ExternalNotificationRequest,
    notification_manager: NotificationManagerService = Depends(
        get_notification_manager
    ),
) -> None:
    """
    Process push notification from external system.

    This endpoint receives notifications (e.g., "Your card was blocked") and:
    1. Stores them in Redis/Firestore
    2. Associates them with the user's conversation session
    3. Triggers a Dialogflow event

    When the user later sends a message asking about the notification
    ("Why was it blocked?"), the message filter will classify it as
    NOTIFICATION and route to the appropriate handler.

    Args:
        request: External notification request with text, phone, and parameters

    Returns:
        None (204 No Content)

    Raises:
        HTTPException: 400 if validation fails, 500 for internal errors
    """
    try:
        logger.info("Received notification request")
        await notification_manager.process_notification(request)
        logger.info("Successfully processed notification request")
        # Match Java behavior: process but don't return response body

    except ValueError as e:
        logger.error(f"Validation error: {str(e)}", exc_info=True)
        raise HTTPException(status_code=400, detail=str(e))

    except Exception as e:
        logger.error(f"Error processing notification: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail="Internal server error")