"""并发执行辅助:线程池 + 信号量,对应 TS SDK 的 ConcurrentLimiter(默认 10)。"""

from __future__ import annotations

from collections.abc import Callable
from concurrent.futures import ThreadPoolExecutor
from typing import Any, TypeVar

T = TypeVar("T")

_DEFAULT_CONCURRENCY = 10


def run_concurrent(
    funcs: list[Callable[[], T]],
    limit: int = _DEFAULT_CONCURRENCY,
) -> list[T]:
    """并发执行一批无参 callable(每个返回一个结果),保持输入顺序返回结果。"""
    if not funcs:
        return []
    with ThreadPoolExecutor(max_workers=max(1, min(limit, len(funcs)))) as pool:
        return list(pool.map(lambda fn: fn(), funcs))