"""
Storage Protocols - 存储接口定义

使用 Protocol 定义接口，允许不同的存储实现（内存、PostgreSQL、Neo4j 等）
"""

from typing import Protocol, List, Optional, Dict, Any, runtime_checkable

from agent.models.trace import Trace, Step
from agent.models.memory import Experience, Skill


@runtime_checkable
class TraceStore(Protocol):
    """Trace + Step 存储接口"""

    # ===== Trace 操作 =====

    async def create_trace(self, trace: Trace) -> str:
        """
        创建新的 Trace

        Args:
            trace: Trace 对象

        Returns:
            trace_id
        """
        ...

    async def get_trace(self, trace_id: str) -> Optional[Trace]:
        """获取 Trace"""
        ...

    async def update_trace(self, trace_id: str, **updates) -> None:
        """
        更新 Trace

        Args:
            trace_id: Trace ID
            **updates: 要更新的字段
        """
        ...

    async def list_traces(
        self,
        mode: Optional[str] = None,
        agent_type: Optional[str] = None,
        uid: Optional[str] = None,
        status: Optional[str] = None,
        limit: int = 50
    ) -> List[Trace]:
        """列出 Traces"""
        ...

    # ===== Step 操作 =====

    async def add_step(self, step: Step) -> str:
        """
        添加 Step

        Args:
            step: Step 对象

        Returns:
            step_id
        """
        ...

    async def get_step(self, step_id: str) -> Optional[Step]:
        """获取 Step"""
        ...

    async def get_trace_steps(self, trace_id: str) -> List[Step]:
        """获取 Trace 的所有 Steps（按 sequence 排序）"""
        ...

    async def get_step_children(self, step_id: str) -> List[Step]:
        """获取 Step 的子节点"""
        ...


@runtime_checkable
class MemoryStore(Protocol):
    """Experience + Skill 存储接口"""

    # ===== Experience 操作 =====

    async def add_experience(self, exp: Experience) -> str:
        """添加 Experience"""
        ...

    async def get_experience(self, exp_id: str) -> Optional[Experience]:
        """获取 Experience"""
        ...

    async def search_experiences(
        self,
        scope: str,
        context: str,
        limit: int = 10
    ) -> List[Experience]:
        """
        搜索相关 Experience

        Args:
            scope: 范围（如 "agent:researcher"）
            context: 当前上下文，用于语义匹配
            limit: 最大返回数量
        """
        ...

    async def update_experience_stats(
        self,
        exp_id: str,
        success: bool
    ) -> None:
        """更新 Experience 使用统计"""
        ...

    # ===== Skill 操作 =====

    async def add_skill(self, skill: Skill) -> str:
        """添加 Skill"""
        ...

    async def get_skill(self, skill_id: str) -> Optional[Skill]:
        """获取 Skill"""
        ...

    async def get_skill_tree(self, scope: str) -> List[Skill]:
        """获取技能树"""
        ...

    async def search_skills(
        self,
        scope: str,
        context: str,
        limit: int = 5
    ) -> List[Skill]:
        """搜索相关 Skills"""
        ...


@runtime_checkable
class StateStore(Protocol):
    """短期状态存储接口（用于 Task State，通常用 Redis）"""

    async def get(self, key: str) -> Optional[Dict[str, Any]]:
        """获取状态"""
        ...

    async def set(
        self,
        key: str,
        value: Dict[str, Any],
        ttl: Optional[int] = None
    ) -> None:
        """
        设置状态

        Args:
            key: 键
            value: 值
            ttl: 过期时间（秒）
        """
        ...

    async def update(self, key: str, **updates) -> None:
        """部分更新"""
        ...

    async def delete(self, key: str) -> None:
        """删除"""
        ...