"""handle-error Lambda handler."""

from typing import Any

from src import config
from src.client import patch_transfer_job


def _job_id_from_event(event: dict[str, Any]) -> int:
    raw_job_id = event["job_id"]
    if isinstance(raw_job_id, bool):
        raise ValueError("event['job_id'] must be an integer.")

    try:
        return int(raw_job_id)
    except (TypeError, ValueError) as exc:
        raise ValueError("event['job_id'] must be an integer.") from exc


def _failure_reason_from_event(event: dict[str, Any]) -> str:
    error = event.get("error")
    if not isinstance(error, dict):
        raise ValueError("event['error'] must be an object.")

    cause = error.get("Cause")
    if isinstance(cause, str) and cause:
        return cause

    error_name = error.get("Error")
    if isinstance(error_name, str) and error_name:
        return error_name

    raise ValueError("event['error'] must include 'Cause' or 'Error'.")


def handler(event: dict[str, Any], context: object) -> dict[str, Any]:
    del context

    job_id = _job_id_from_event(event)
    failure_reason = _failure_reason_from_event(event)
    config.logger.info(f"Handling error for transfer job {job_id}")
    patch_transfer_job(job_id, {"status": "FAILED", "failure_reason": failure_reason})
    config.logger.info(f"Transfer job {job_id} marked FAILED")
    return {"statusCode": 200}