import json
import logging
from io import StringIO

import structlog

from app.runtime.logging import configure_logging


def test_application_log_is_serialized_as_json() -> None:
    stream = StringIO()

    configure_logging(stream=stream)

    logging.getLogger("app.test").info("application_event")

    payload = json.loads(stream.getvalue().splitlines()[0])

    assert payload["event"] == "application_event"
    assert payload["level"] == "info"
    assert payload["logger"] == "app.test"
    assert isinstance(payload["timestamp"], str)

    _reset_logging()


def test_uvicorn_loggers_use_shared_json_logging_setup() -> None:
    stream = StringIO()

    configure_logging(stream=stream)

    logging.getLogger("uvicorn.error").error("uvicorn_error_event")
    logging.getLogger("uvicorn.access").info("uvicorn_access_event")

    records = [json.loads(line) for line in stream.getvalue().splitlines()]

    assert [record["event"] for record in records] == [
        "uvicorn_error_event",
        "uvicorn_access_event",
    ]
    assert [record["logger"] for record in records] == [
        "uvicorn.error",
        "uvicorn.access",
    ]
    assert all(record["level"] in {"error", "info"} for record in records)
    assert all(isinstance(record["timestamp"], str) for record in records)

    _reset_logging()


def _reset_logging() -> None:
    structlog.reset_defaults()
    root_logger = logging.getLogger()
    root_logger.handlers = []
    for logger_name in ("uvicorn", "uvicorn.error", "uvicorn.access"):
        logging.getLogger(logger_name).handlers = []