import requests
from fastapi import HTTPException, status

from .config import settings

def update_did_routing(did: str, routing: str):
    """
    Calls the VoIP.ms API to update the routing for a specific DID.

    Args:
        did (str): The phone number (DID) to update.
        routing (str): The new routing string (e.g., 'sip:user@server' or 'fwd:15551234567').

    Raises:
        HTTPException: If the API call fails or returns an error.

    Returns:
        dict: The JSON response from the VoIP.ms API on success.
    """
    params = {
        "api_username": settings.voipms_api_username,
        "api_password": settings.voipms_api_password,
        "method": "setDIDInfo",
        "did": did,
        "routing": routing,
    }

    try:
        response = requests.get(settings.voipms_api_url, params=params)
        response.raise_for_status()  # Raises an HTTPError for bad responses (4xx or 5xx)

        data = response.json()

        # VoIP.ms API has its own status field in the JSON response
        if data.get("status") != "success":
            raise HTTPException(
                status_code=status.HTTP_400_BAD_REQUEST,
                detail=f"VoIP.ms API Error: {data.get('status')}"
            )

        return data

    except requests.exceptions.RequestException as e:
        # Handle network errors, timeouts, etc.
        raise HTTPException(
            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
            detail=f"Failed to connect to VoIP.ms API: {e}"
        )
    except Exception as e:
        # Catch any other exceptions, including the ones we raised manually
        if isinstance(e, HTTPException):
            raise e # Re-raise if it's already an HTTPException
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=f"An unexpected error occurred: {e}"
        )