"""策略账户快照，供采集线程读取。"""

from copy import deepcopy
from threading import Lock

from sdk import Assets, DealItem, PositionItem


_collector_lock = Lock()
_collector_snapshot: tuple[str, Assets, list[PositionItem], list[DealItem]] | None = None


def cache_portfolio(
    account_id: str,
    assets: Assets,
    positions: list[PositionItem],
    deals: list[DealItem],
) -> None:
    """整体替换最新快照，策略线程不执行序列化和网络上报。"""
    global _collector_snapshot
    with _collector_lock:
        _collector_snapshot = (account_id, assets, positions, deals)


def get_collector_snapshot() -> tuple[str, Assets, list[PositionItem], list[DealItem]] | None:
    """供 scheduler 读取；复制在锁外执行，不阻塞下一轮缓存更新。"""
    with _collector_lock:
        snapshot = _collector_snapshot
    return deepcopy(snapshot)