"""影子柜台 CLI 入口。

用法:
    python -m sanguo_trader.shadow             # 读 env(见 runner.py docstring)
    python -m sanguo_trader.shadow --auto      # 主管模式:轮询 paper 库自动拉起影子账户
"""
from __future__ import annotations

import logging
import os
import sys
from pathlib import Path

LOCK_FILE = Path(
    os.environ.get("SANGUO_SHADOW_LOCK")
    or Path.home() / ".sanguo_shadow_desk.lock"
)


def _acquire_lock() -> "object | None":
    """单实例锁(Windows/msvcrt 与 POSIX/fcntl 双兼容)。"""
    LOCK_FILE.parent.mkdir(parents=True, exist_ok=True)
    try:
        import fcntl  # POSIX

        fh = open(LOCK_FILE, "w")
        fcntl.flock(fh, fcntl.LOCK_EX | fcntl.LOCK_NB)
        return fh
    except ImportError:
        pass
    except OSError:
        return None  # 已有实例在跑
    try:
        import msvcrt  # Windows

        fh = open(LOCK_FILE, "w")
        msvcrt.locking(fh.fileno(), msvcrt.LK_NBLCK, 1)
        return fh
    except (ImportError, OSError):
        return None


def main() -> int:
    logging.basicConfig(
        level=logging.INFO,
        format="%(asctime)s %(levelname)s %(name)s: %(message)s",
    )
    if "--auto" in sys.argv:
        # supervisor 自身日志落文件(schtasks 控制台输出是黑洞,拉起/重启决策无处可查)
        try:
            _log_dir = Path(__file__).resolve().parents[2] / "logs"
            _log_dir.mkdir(parents=True, exist_ok=True)
            _fh = logging.FileHandler(_log_dir / "shadow_supervisor.log")
            _fh.setFormatter(logging.Formatter(
                "%(asctime)s %(levelname)s %(name)s: %(message)s"))
            logging.getLogger().addHandler(_fh)
        except Exception:
            pass  # 日志失败不挡主管
        from .supervisor import run_auto_supervisor

        run_auto_supervisor()
        return 0
    if "--account" in sys.argv:
        # 多账户 worker 不抢全局 solo 锁:全局锁全机只放行一个 worker,supervisor
        # 多账户并存时其余全部"锁占用"优雅退出(VPS 2026-08-16 实录 40/41 反复
        # rc=0,单账户时代从未暴露)。同账户防重复由 bullet_trade
        # runtime/shadow_{aid} 实例锁兜底,supervisor children 表保证一账户一进程。
        from .runner import run_shadow

        run_shadow()
        return 0
    lock = _acquire_lock()
    if lock is None:
        print("影子柜台已在运行(锁占用),本次启动退出。", flush=True)
        return 0
    from .runner import run_shadow

    run_shadow()
    return 0


if __name__ == "__main__":
    sys.exit(main())