import logging
import os
from logging.handlers import RotatingFileHandler
from typing import Any, Dict


def setup_logging(config: Dict[str, Any]) -> None:
    """根据配置初始化日志。

    - 控制台输出
    - 可选文件轮转输出（默认启用）
    - 不重复添加 handler（幂等）
    """
    debug_cfg = (config or {}).get("debug", {})
    log_level_name = str(debug_cfg.get("log_level", "INFO")).upper()
    log_to_file = bool(debug_cfg.get("log_to_file", True))
    out_dir = debug_cfg.get("out_dir", "debug_out")
    file_name = debug_cfg.get("file_name", "txm.log")
    max_bytes = int(debug_cfg.get("max_bytes", 10 * 1024 * 1024))
    backup_count = int(debug_cfg.get("backup_count", 5))

    try:
        level = getattr(logging, log_level_name)
    except Exception:
        level = logging.INFO

    root_logger = logging.getLogger()
    if root_logger.handlers:
        # 已经初始化过
        root_logger.setLevel(level)
        return

    fmt = (
        "%(asctime)s.%(msecs)03d | %(levelname)s | %(name)s | "
        "%(message)s"
    )
    datefmt = "%Y-%m-%d %H:%M:%S"

    root_logger.setLevel(level)

    console = logging.StreamHandler()
    console.setLevel(level)
    console.setFormatter(logging.Formatter(fmt=fmt, datefmt=datefmt))
    root_logger.addHandler(console)

    if log_to_file:
        os.makedirs(out_dir, exist_ok=True)
        file_path = os.path.join(out_dir, file_name)
        file_handler = RotatingFileHandler(
            file_path, maxBytes=max_bytes, backupCount=backup_count, encoding="utf-8"
        )
        file_handler.setLevel(level)
        file_handler.setFormatter(logging.Formatter(fmt=fmt, datefmt=datefmt))
        root_logger.addHandler(file_handler)