def _esc(text) -> str:
    return (str(text).replace("&", "&amp;").replace("<", "&lt;")
            .replace(">", "&gt;").replace('"', "&quot;"))


def _kb(value: int) -> str:
    if value < 1024:
        return f"{value} B"
    if value < 1024 * 1024:
        return f"{value / 1024:.1f} KB"
    return f"{value / 1024 / 1024:.1f} MB"


def _uptime(seconds: int) -> str:
    days, rest = divmod(int(seconds), 86400)
    hours, rest = divmod(rest, 3600)
    minutes = rest // 60
    if days:
        return f"{days} 天 {hours} 小时"
    if hours:
        return f"{hours} 小时 {minutes} 分"
    return f"{minutes} 分"


# ======================================================================
# 启动
# ======================================================================

class Server(ThreadingHTTPServer):
    daemon_threads = True
    allow_reuse_address = True
    request_queue_size = 64


def main() -> int:
    DATA_DIR.mkdir(parents=True, exist_ok=True)
    try:
        server = Server((BIND, PORT), Handler)
    except OSError as exc:
        print(f"监听 {BIND}:{PORT} 失败：{exc}")
        return 1

    log(f"中转服务器 v{VERSION} 启动，监听 {BIND}:{PORT}")
    log(f"长轮询 {POLL_SECONDS:.0f} 秒 · 队列上限 "
        f"{MAX_QUEUE_BYTES // 1024} KB · 数据目录 {DATA_DIR}")
    key = admin_key()
    log(f"管理页：http://<本机>:{PORT}/?key={key}")
    log(f"（钥匙也在 {DATA_DIR / 'admin_key.txt'}）")

    try:
        server.serve_forever()
    except KeyboardInterrupt:
        log("收到中断，退出")
    finally:
        server.server_close()
    return 0


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