# =============================================================================
# 企微IT智能服务台 — 企微 JS-SDK 签名 API (v0.5.4 应急页用)
# =============================================================================
# 说明：提供前端 wx.config / wx.agentConfig 所需的鉴权签名。
# 对应企微文档:https://developer.work.weixin.qq.com/document/path/90506
#
# 流程：
#   1. 前端调 GET /api/wecom/jsapi-config?url=xxx 拿签名
#   2. 后端用 jsapi_ticket + url 算 sha1 签名
#   3. 前端用 wx.config({...}) 鉴权后,即可调企微 JS-SDK(如 wx.agentConfig)
#
# BC/DR 设计:不依赖 session/auth,公开访问(只返回签名,不返回敏感数据)
# =============================================================================

import logging
import secrets
import time

from fastapi import APIRouter, Query

from app.config import settings
from app.dependencies import get_shared_wecom_service
from app.utils.response import AppException, success_response

logger = logging.getLogger(__name__)

router = APIRouter()


@router.get("/wecom/jsapi-config")
async def get_jsapi_config(
    url: str = Query(..., description="当前页面 URL(不含 # 及其后)"),
):
    """获取企微 JS-SDK 鉴权配置。

    供前端 wx.config 和 wx.agentConfig 使用。

    Returns:
        {
            "code": 0,
            "data": {
                "corp_id": "wwa8c87970b2011f41",
                "agent_id": "1000133",
                "timestamp": 1718500000,
                "nonce_str": "5K8264ILTKCH...",
                "signature": "f7c8e9..."
            }
        }
    """
    try:
        wecom_service = get_shared_wecom_service()

        # 1. 获取 jsapi_ticket
        ticket = await wecom_service.get_jsapi_ticket()

        # 2. 生成时间戳和随机串
        timestamp = int(time.time())
        nonce_str = secrets.token_hex(8)  # 16 字符

        # 3. 计算签名
        signature = wecom_service.generate_jsapi_signature(
            ticket=ticket,
            nonce_str=nonce_str,
            timestamp=timestamp,
            url=url,
        )

        logger.info(
            f"生成 JS-SDK 签名: url={url[:80]}... timestamp={timestamp}"
        )

        return success_response(
            {
                "corp_id": settings.wecom_corp_id,
                "agent_id": str(settings.wecom_agent_id),
                "timestamp": timestamp,
                "nonce_str": nonce_str,
                "signature": signature,
            }
        )

    except Exception as e:
        logger.error(f"生成 JS-SDK 签名失败: {e}", exc_info=True)
        raise AppException(
            code=5001,
            message=f"生成 JS-SDK 签名失败: {str(e)}",
        ) from e


# =============================================================================
# 应急页身份检测 (v0.5.4)
# =============================================================================
# 流程：
#   1. 前端用 wx.agentConfig 拿到当前 userid
#   2. 前端调 GET /api/wecom/check-role?userid=xxx
#   3. 后端用企微通讯录 API 查 userid 是否在"IT支持-咨询坐席"标签里
#   4. 返回 "user" 或 "agent"
# =============================================================================


@router.get("/wecom/check-role")
async def check_emergency_role(
    userid: str = Query(..., description="企微 userid"),
):
    """检测当前账号在应急页场景下的角色。

    实现方式(优先级递减)：
    1. 企微通讯录标签检测(若配置 WECOM_AGENT_TAG_ID)
    2. 后台硬编码名单(若配置 WECOM_AGENT_USERIDS 环境变量)
    3. 默认 "user" (兜底)

    Args:
        userid: 企微 userid(从 wx.agentConfig 拿)

    Returns:
        {
            "code": 0,
            "data": {
                "role": "user" | "agent",
                "userid": "...",
                "method": "tag" | "hardcoded" | "default"
            }
        }
    """
    wecom_service = get_shared_wecom_service()

    # 方式 1:企微标签检测
    tag_id = getattr(settings, "wecom_agent_tag_id", None)
    if tag_id:
        try:
            access_token = await wecom_service.get_access_token()
            url = f"https://qyapi.weixin.qq.com/cgi-bin/tag/get?access_token={access_token}&tagid={tag_id}"
            import httpx
            async with httpx.AsyncClient(timeout=5.0) as client:
                resp = await client.get(url)
                result = resp.json()

            if result.get("errcode", 0) == 0:
                user_list = result.get("userlist", [])
                # userlist 元素可能是 str(老版)或 dict(新版带 name)
                user_ids = [
                    u if isinstance(u, str) else u.get("userid", "")
                    for u in user_list
                ]
                if userid in user_ids:
                    logger.info(f"标签检测: userid={userid} 是坐席")
                    return success_response(
                        {"role": "agent", "userid": userid, "method": "tag"}
                    )
                else:
                    logger.info(f"标签检测: userid={userid} 是员工")
                    return success_response(
                        {"role": "user", "userid": userid, "method": "tag"}
                    )
            else:
                logger.warning(
                    f"标签 API 失败: errcode={result.get('errcode')}, "
                    f"errmsg={result.get('errmsg')}, 降级到硬编码"
                )
        except Exception as e:
            logger.warning(f"标签检测失败（降级）: {e}")

    # 方式 2:硬编码名单
    hardcoded = getattr(settings, "wecom_agent_userids", None)
    if hardcoded:
        agent_ids = [x.strip() for x in hardcoded.split(",") if x.strip()]
        if userid in agent_ids:
            logger.info(f"硬编码名单: userid={userid} 是坐席")
            return success_response(
                {"role": "agent", "userid": userid, "method": "hardcoded"}
            )
        else:
            return success_response(
                {"role": "user", "userid": userid, "method": "hardcoded"}
            )

    # 方式 3:默认 user
    logger.info(f"未配置检测方式, userid={userid} 默认 user")
    return success_response(
        {"role": "user", "userid": userid, "method": "default"}
    )