from mem0 import MemoryClient
import os
from logging import getLogger
log = getLogger(__name__)

mem0_api_key = os.getenv("MEM0_API_KEY")
memory_client = MemoryClient(api_key=mem0_api_key)

async def mem0_search(user_id: str, chat_id: str, last_message: str) -> list[str]:
    """
    预留的 Mem0 检索接口：当前为占位实现。
    未来可替换为实际检索逻辑，返回若干相关记忆条目（字符串）。
    增加 chat_id 便于按会话窗口区分/隔离记忆。
    """
    try:
        # TODO: 接入真实 Mem0 检索
        log.info(f"mem0_search called with user_id: {user_id}, chat_id: {chat_id}, last_message: {last_message}")
        serach_rst = memory_client.search(
        query=last_message, 
       filters={"user_id": user_id}
    )
        memories=serach_rst["results"] if "results" in serach_rst else serach_rst
        log.info(f"mem0_search found {len(memories)} memories")
        return [mem["text"] for mem in memories]
    except Exception as e:
        log.debug(f"Mem0 search failed: {e}")
        return []


async def mem0_delete(user_id: str, chat_id: str) -> bool:
    """
    删除指定用户在指定 chat 窗口下的所有 Mem0 相关记忆（占位实现）。
    未来可替换为实际删除逻辑。
    """
    try:
        # TODO: 接入真实删除逻辑（如按 chat_id 过滤）
        log.info(f"mem0_delete called with user_id: {user_id}, chat_id: {chat_id}")
        memory_client.delete(
            filters={"user_id": user_id}
        )
        return True
    except Exception as e:
        log.debug(f"Mem0 delete failed: {e}")
        return False