import requests
import json
import time
import logging
from app.core.config import settings
from typing import Dict, Any, Optional, List
import aiohttp
class WecomClient:
    """企业微信客户端"""
    
    def __init__(self):
        self.corp_id = settings.WECHAT_CORP_ID
        self.corp_secret = settings.WECHAT_CORP_SECRET
        self.access_token = None
    
    async def get_access_token(self) -> str:
        """获取访问令牌"""
        try:
            url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken"
            params = {
                "corpid": self.corp_id,
                "corpsecret": self.corp_secret
            }
            
            async with aiohttp.ClientSession() as session:
                async with session.get(url, params=params) as response:
                    result = await response.json()
                    
                    if result.get("errcode") == 0:
                        self.access_token = result["access_token"]
                        return self.access_token
                    else:
                        raise Exception(f"获取access_token失败: {result}")
        except Exception as e:
            logging.error(f"获取access_token异常: {str(e)}")
            return None
        
    async def code2session(self, js_code: str) -> Optional[Dict[str, Any]]:
        """
        小程序登录凭证校验
        """
        try:
            # 1. 获取 access_token
            access_token = await self.get_access_token()
            if not access_token:
                raise Exception("获取access_token失败")

            # 2. 调用 jscode2session 接口
            url = "https://qyapi.weixin.qq.com/cgi-bin/miniprogram/jscode2session"
            params = {
                "access_token": access_token,
                "js_code": js_code,
                "grant_type": "authorization_code"
            }
            
            async with aiohttp.ClientSession() as session:
                async with session.get(url, params=params) as response:
                    result = await response.json()
                    
                    if result.get("errcode") == 0:
                        return {
                            "userid": result.get("userid"),
                            "pending_id": result.get("pending_id"),
                            "session_key": result.get("session_key")
                        }
                    else:
                        logging.error(f"code2session失败: {result}")
                        return None
                        
        except Exception as e:
            logging.error(f"code2session异常: {str(e)}")
            return None

wecom_client = WecomClient()