from __future__ import annotations

import logging
import os
from logging.handlers import RotatingFileHandler
from pathlib import Path

_LOGGER_READY = False


def _configure_root_logger() -> None:
    global _LOGGER_READY
    if _LOGGER_READY:
        return

    log_path = Path(os.environ.get("LOG_FILE_PATH", "logs/app.log"))
    log_path.parent.mkdir(parents=True, exist_ok=True)

    root_logger = logging.getLogger("smart_career")
    root_logger.setLevel(logging.INFO)

    formatter = logging.Formatter(
        fmt="%(asctime)s | %(levelname)s | %(name)s | %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S",
    )

    file_handler = RotatingFileHandler(
        filename=log_path,
        maxBytes=2 * 1024 * 1024,
        backupCount=3,
        encoding="utf-8",
    )
    file_handler.setFormatter(formatter)

    stream_handler = logging.StreamHandler()
    stream_handler.setFormatter(formatter)

    root_logger.addHandler(file_handler)
    root_logger.addHandler(stream_handler)
    _LOGGER_READY = True


def get_logger(name: str) -> logging.Logger:
    _configure_root_logger()
    return logging.getLogger(f"smart_career.{name}")