"""
QKA MCP API 模块

提供Model Context Protocol的API接口定义
"""

from typing import Dict, Any, Optional, List
import asyncio
import json
from datetime import datetime

class MCPServer:
    """MCP服务器"""
    
    def __init__(self, host: str = "localhost", port: int = 8080):
        """
        初始化MCP服务器
        
        Args:
            host: 服务器主机地址
            port: 服务器端口
        """
        self.host = host
        self.port = port
        self.clients = {}
        self.handlers = {}
        self.running = False
    
    def register_handler(self, method: str, handler):
        """注册处理器"""
        self.handlers[method] = handler
    
    async def start(self):
        """启动服务器"""
        self.running = True
        print(f"MCP服务器启动在 {self.host}:{self.port}")
    
    async def stop(self):
        """停止服务器"""
        self.running = False
        print("MCP服务器已停止")
    
    async def handle_request(self, request: Dict[str, Any]) -> Dict[str, Any]:
        """处理请求"""
        method = request.get("method")
        params = request.get("params", {})
        
        if method in self.handlers:
            result = await self.handlers[method](params)
            return {"result": result}
        else:
            return {"error": f"未知方法: {method}"}

class MCPClient:
    """MCP客户端"""
    
    def __init__(self, server_url: str):
        """
        初始化MCP客户端
        
        Args:
            server_url: 服务器URL
        """
        self.server_url = server_url
        self.session_id = None
        self.connected = False
    
    async def connect(self):
        """连接到服务器"""
        self.connected = True
        self.session_id = f"session_{datetime.now().timestamp()}"
        print(f"已连接到MCP服务器: {self.server_url}")
    
    async def disconnect(self):
        """断开连接"""
        self.connected = False
        self.session_id = None
        print("已断开MCP服务器连接")
    
    async def request(self, method: str, params: Optional[Dict[str, Any]] = None) -> Dict[str, Any]:
        """
        发送请求
        
        Args:
            method: 方法名
            params: 参数
            
        Returns:
            响应结果
        """
        if not self.connected:
            raise ConnectionError("未连接到服务器")
        
        request = {
            "method": method,
            "params": params or {},
            "session_id": self.session_id
        }
        
        # 模拟网络请求
        await asyncio.sleep(0.1)
        
        return {"result": "success", "data": params}

class ContextManager:
    """上下文管理器"""
    
    def __init__(self):
        """初始化上下文管理器"""
        self.contexts = {}
        self.current_context = None
    
    def create_context(self, context_id: str, data: Dict[str, Any]) -> str:
        """
        创建上下文
        
        Args:
            context_id: 上下文ID
            data: 上下文数据
            
        Returns:
            创建的上下文ID
        """
        self.contexts[context_id] = {
            "id": context_id,
            "data": data,
            "created_at": datetime.now(),
            "updated_at": datetime.now()
        }
        return context_id
    
    def get_context(self, context_id: str) -> Optional[Dict[str, Any]]:
        """获取上下文"""
        return self.contexts.get(context_id)
    
    def update_context(self, context_id: str, data: Dict[str, Any]):
        """更新上下文"""
        if context_id in self.contexts:
            self.contexts[context_id]["data"].update(data)
            self.contexts[context_id]["updated_at"] = datetime.now()
    
    def delete_context(self, context_id: str):
        """删除上下文"""
        if context_id in self.contexts:
            del self.contexts[context_id]
    
    def set_current_context(self, context_id: str):
        """设置当前上下文"""
        if context_id in self.contexts:
            self.current_context = context_id
    
    def get_current_context(self) -> Optional[Dict[str, Any]]:
        """获取当前上下文"""
        if self.current_context:
            return self.get_context(self.current_context)
        return None
