"""内置浏览器自动化运行时（engine/），无需单独安装 LIKE AI。"""

from __future__ import annotations

import sys
from pathlib import Path


def engine_root() -> Path:
    return Path(__file__).resolve().parent.parent / "engine"


def extension_dir() -> Path:
    return engine_root() / "extension"


def ensure_runtime_importable() -> Path:
    root = engine_root()
    if not (root / "xhs_bridge").is_dir():
        raise RuntimeError(f"内置运行时缺失: {root / 'xhs_bridge'}")
    if not (root / "scripts").is_dir():
        raise RuntimeError(f"内置脚本缺失: {root / 'scripts'}")
    if not (root / "extension").is_dir():
        raise RuntimeError(f"Chrome 扩展缺失: {root / 'extension'}")

    root_str = str(root)
    if root_str not in sys.path:
        sys.path.insert(0, root_str)
    return root