from __future__ import annotations
import time
import uuid

import quart
import asyncio

import sqlalchemy

from pkg.entity.persistence.mcp import MCPServer

from .....core import taskmgr
from .. import group

from sqlalchemy import insert

@group.group_class('mcp', '/api/v1/mcp')
class MCPRouterGroup(group.RouterGroup):
    async def initialize(self) -> None:
        @self.route('/servers', methods=['GET', 'POST'], auth_type=group.AuthType.USER_TOKEN)
        async def _() -> str:
            """获取MCP服务器列表"""
            if quart.request.method == 'GET':
                result = await self.ap.persistence_mgr.execute_async(
                    sqlalchemy.select(MCPServer).order_by(MCPServer.created_at.desc())
                )
                servers = [self.ap.persistence_mgr.serialize_model(MCPServer, row) for row in result.scalars().all()]
                
                servers_with_status = []
                for server in servers:
                    if servers['enable']:
                        status = 'enabled'
                    else:
                        status = 'disabled'

                    #   这里先写成开关状态，先不写连接状态
                    server_info = {
                        'name': server['name'],
                        'mode': server['mode'],
                        'enable': server['enable'],
                        'description': server.get('description',''),
                        'extra_args': server.get('extra_args',{}),
                        'status': status,
                    }
                    servers_with_status.append(server_info)

                return self.success(data={'servers': servers_with_status})
            
            elif quart.request.method == 'POST':
                data = await quart.request.json

                # 检查服务器名称是否重复
                result = await self.ap.persistence_mgr.execute_async(
                    sqlalchemy.select(MCPServer).where(MCPServer.name == data['name'])
                )
                if result.first() is not None:
                    return self.http_status(400, -1, 'Server name already exists')
                
                # 创建新服务器配置
                new_server = {
                    'uuid': str(uuid.uuid4()),
                    'name': data['name'],
                    'mode': data['mode'],
                    'enable': data.get('enable', False),
                    'description': data.get('description',''),
                    'extra_args': {
                        'url':data.get('url',''),
                        'headers':data.get('headers',{}),
                        'timeout':data.get('timeout',60),
                    },
                }

                await self.ap.persistence_mgr.execute_async(
                    sqlalchemy.insert(MCPServer).values(new_server)
                )

        @self.route('/servers/<server_name>', methods=['GET', 'PUT', 'DELETE'], auth_type=group.AuthType.USER_TOKEN)
        async def _(server_name: str) -> str:
            """获取、更新或删除MCP服务器配置"""
            result = await self.ap.persistence_mgr.execute_async(
                sqlalchemy.select(MCPServer).where(MCPServer.name == server_name)
            )
            server = result.first()
            if server is None:
                return self.http_status(404, -1, 'Server not found')
            
            if quart.request.method == 'GET':
                server_data = self.ap.persistence_mgr.serialize_model(MCPServer, server)
                return self.success(data={'server': server_data})
            
            elif quart.request.method == 'PUT':
                data = await quart.request.json
                update_data = {
                    'enable': data.get('enable', server.enable),
                    'description': data.get('description', server.description),
                }

                extra_args = server.extra_args or {}
                if server.mode == 'sse':
                    extra_args.update({
                        'url': data.get('url', extra_args.get('url','')),
                        'headers': data.get('headers', extra_args.get('headers',{})),
                        'timeout': data.get('timeout', extra_args.get('timeout',60)),
                    })
                update_data['extra_args'] = extra_args

                await self.ap.persistence_mgr.execute_async(
                    sqlalchemy.update(MCPServer).where(MCPServer.name == server_name).values(update_data)
                )

                return self.success()
            
            elif quart.request.method == 'DELETE':
                await self.ap.persistence_mgr.execute_async(
                    sqlalchemy.delete(MCPServer).where(MCPServer.name == server_name)
                )
                return self.success()
            
        @self.route('/servers/<server_name>/test', methods=['POST'], auth_type=group.AuthType.USER_TOKEN)
        async def _(server_name: str) -> str:
            """测试MCP服务器连接"""
            result = await self.ap.persistence_mgr.execute_async(
                sqlalchemy.select(MCPServer).where(MCPServer.name == server_name)
            )
            server = result.first()
            if server is None:
                return self.http_status(404, -1, 'Server not found')
            
            # 创建测试任务
            ctx = taskmgr.TaskContext.new()
            wrapper = self.ap.task_mgr.create_user_task(
                self._test_mcp_server(server, ctx),
                kind='mcp-operation',
                name=f'mcp-test-{server_name}',
                label=f'Testing MCP server {server_name}',
                context=ctx,
            )
            return self.success(data={'task_id': wrapper.id})
            
    async def _test_mcp_server(self, server: MCPServer, ctx: taskmgr.TaskContext):
        """测试MCP服务器连接"""
        try:
            from .....provider.tools.loaders.mcp import RuntimeMCPSession

            ctx.current_action = f'Testing connection to {server.name}'

            # 创建临时会话进行测试
            session = RuntimeMCPSession(server.name, {
                'name': server.name,
                'mode': server.mode,
                'enable': server.enable,
                'description': server.description,
                'extra_args': server.extra_args or {},
            }, self.ap)
            await session.initialize()

            # 获取工具列表作为测试
            tools_count = len(session.functions)
            ctx.current_action = f'Successfully connected. Found {tools_count} tools.'

            # 关闭测试会话
            await session.shutdown()

            return {'status': 'success', 'tools_count': tools_count}

        except Exception as e:
            ctx.current_action = f'Connection test failed: {str(e)}'
            raise e