"""投顾 Agent 对现有统一记忆系统的适配边界。"""
from __future__ import annotations

from typing import Protocol


class MemoryProvider(Protocol):
    async def recall(self, *, customer_id: int, query: str) -> list[dict]:
        """召回客户相关记忆，返回结构化记忆单元。"""


class EmptyMemoryProvider:
    """记忆系统未接入时的安全默认实现。"""

    async def recall(self, *, customer_id: int, query: str) -> list[dict]:
        return []


class MemoryServiceProvider:
    """将现有 MemoryService 的统一上下文转换为投顾侧记忆列表。

    投顾推荐场景**需要**长期记忆（偏好标签、投资目标），因此显式开启
    ``include_long_term=True``。客服 Agent 走默认值 False，不重复召回。
    """

    def __init__(
        self,
        memory_service,
        *,
        session_prefix: str = "advisor-agent",
        include_long_term: bool = True,
    ):
        self.memory_service = memory_service
        self.session_prefix = session_prefix
        self.include_long_term = include_long_term
        self.last_warnings: list[str] = []

    async def recall(self, *, customer_id: int, query: str) -> list[dict]:
        self.last_warnings = []
        try:
            context = await self.memory_service.recall(
                customer_id=customer_id,
                session_id=f"{self.session_prefix}:{customer_id}",
                query=query,
                include_long_term=self.include_long_term,
            )
        except Exception as exc:
            self.last_warnings = [f"advisor_memory_recall_failed:{type(exc).__name__}"]
            return []

        self.last_warnings.extend(getattr(context, "warnings", []) or [])
        memories = getattr(context, "long_term_memories", context)
        return [self._to_dict(memory) for memory in memories]

    @staticmethod
    def _to_dict(memory) -> dict:
        if hasattr(memory, "model_dump"):
            data = memory.model_dump(mode="json")
        else:
            data = dict(memory)
        return {
            "customer_id": data.get("customer_id"),
            "tag": data.get("tag"),
            "content": data.get("content"),
            "info_type": data.get("info_type", "FACT"),
            "memory_type": data.get("memory_type"),
        }


__all__ = ["EmptyMemoryProvider", "MemoryProvider", "MemoryServiceProvider"]