"""
Model Cleanup Hook - 轻量级模型清理事件采集 hook

该模块提供与 fileLoc 侧 model cleanup 事件收集的接口。
当 fileLoc 未安装时，该模块为空操作，不影响主流程。

被 BaseAdapter.cleanup() (通过 monkey patch 拦截) 调用，侵入量：2行。
"""

import threading
from datetime import datetime
from typing import Dict, Any, List, Optional

# 线程安全存储
_cleanup_events: List[Dict[str, Any]] = []
_cleanup_lock = threading.Lock()


def on_cleanup(adapter_name: str, model_name: str, cleanup_type: str) -> None:
    """
    模型清理回调 - 被 BaseAdapter.cleanup() 调用

    Args:
        adapter_name: 适配器名称 (如 "MinerUAdapter")
        model_name: 模型名称 (如 "layout_detector")
        cleanup_type: 清理类型 ("start" 或 "end")
    """
    if not adapter_name or not model_name:
        return

    if cleanup_type not in ("start", "end"):
        return

    event = {
        'adapter_name': adapter_name,
        'model_name': model_name,
        'cleanup_type': cleanup_type,
        'timestamp': datetime.now().isoformat()
    }

    with _cleanup_lock:
        _cleanup_events.append(event)


def get_cleanup_events() -> List[Dict[str, Any]]:
    """
    获取所有清理事件 (供 fileLoc 调用)

    Returns:
        清理事件列表
    """
    with _cleanup_lock:
        return list(_cleanup_events)


def clear_cleanup_events() -> None:
    """清除所有清理事件"""
    with _cleanup_lock:
        _cleanup_events.clear()