import uuid
import httpx
from fastapi import APIRouter, Depends, HTTPException, Request
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
from database import get_db
from models import User, ChatSession, ChatMessage

router = APIRouter(prefix="/api/wecom", tags=["wecom"])


@router.post("/callback")
async def wecom_callback(request: Request, db: AsyncSession = Depends(get_db)):
    """
    接收企业微信回调消息，路由到AI助手处理并回复。
    企微配置的回调URL指向此端点。
    """
    try:
        body = await request.json()
    except Exception:
        body = await request.body()

    msg_type = "text"
    wecom_user_id = ""
    content = ""
    if isinstance(body, dict):
        msg_type = body.get("msg_type", body.get("MsgType", "text"))
        wecom_user_id = body.get("user_id", body.get("FromUserName", ""))
        content = body.get("content", body.get("Content", ""))

    if not wecom_user_id or not content:
        return {"code": 200, "message": "received"}

    user_result = await db.execute(
        select(User).where(User.wecom_user_id == wecom_user_id)
    )
    user = user_result.scalar_one_or_none()
    if not user:
        return {"code": 200, "message": "received", "data": {"note": "user not found"}}

    from agentscope.message import Msg

    session_result = await db.execute(
        select(ChatSession)
        .where(ChatSession.user_id == user.id, ChatSession.agent_type == "employee")
        .order_by(ChatSession.updated_at.desc())
        .limit(1)
    )
    session = session_result.scalar_one_or_none()
    session_id = f"wecom_{wecom_user_id}_{uuid.uuid4().hex[:8]}"
    if not session:
        session = ChatSession(
            user_id=user.id, agent_type="employee",
            session_id=session_id,
        )
        db.add(session)
        await db.flush()

    user_msg = ChatMessage(
        session_id=session.id, user_id=user.id,
        role="user", content=content,
    )
    db.add(user_msg)
    await db.flush()

    from agentscope_integration.factory import AgentFactory
    agent = await AgentFactory.create_agent(
        agent_type="employee",
        user_id=str(user.id),
        user_name=user.display_name,
        department_id=str(user.department_id) if user.department_id else None,
    )

    input_msg = Msg(name="user", content=content, role="user")
    response = await agent.reply(input_msg)

    reply_text = response.get_text_content() if hasattr(response, 'get_text_content') else str(response)

    ai_msg = ChatMessage(
        session_id=session.id, user_id=user.id,
        role="assistant", content=reply_text,
    )
    db.add(ai_msg)

    return {
        "code": 200,
        "message": "ok",
        "data": {
            "msg_type": msg_type,
            "user_id": wecom_user_id,
            "reply": reply_text,
        },
    }


@router.post("/send")
async def send_wecom_message(
    request: Request,
    payload: dict,
    db: AsyncSession = Depends(get_db),
):
    """
    向企业微信用户推送消息。
    生产环境中需配置真实的企微API凭据。
    """
    to_user = payload.get("to_user", "")
    msg_content = payload.get("content", "")
    msg_type = payload.get("msg_type", "text")

    if not to_user:
        raise HTTPException(400, "缺少目标用户")

    corp_id = ""
    corp_secret = ""
    wecom_message_id = f"msg_{uuid.uuid4().hex[:12]}"

    if corp_id and corp_secret:
        try:
            async with httpx.AsyncClient() as client:
                token_resp = await client.get(
                    "https://qyapi.weixin.qq.com/cgi-bin/gettoken",
                    params={"corpid": corp_id, "corpsecret": corp_secret},
                )
                token_data = token_resp.json()
                access_token = token_data.get("access_token")

                if access_token:
                    msg_body = {
                        "touser": to_user,
                        "msgtype": msg_type,
                        "agentid": 0,
                    }
                    if msg_type == "text":
                        msg_body["text"] = {"content": msg_content}
                    elif msg_type == "textcard":
                        msg_body["textcard"] = payload.get("card", {})

                    msg_resp = await client.post(
                        f"https://qyapi.weixin.qq.com/cgi-bin/message/send",
                        params={"access_token": access_token},
                        json=msg_body,
                    )
                    resp_data = msg_resp.json()
                    if resp_data.get("errcode") == 0:
                        wecom_message_id = resp_data.get("msgid", wecom_message_id)
        except Exception:
            pass

    return {
        "code": 200,
        "message": "消息已发送",
        "data": {"wecom_message_id": wecom_message_id},
    }


@router.get("/config")
async def get_wecom_config(request: Request):
    return {
        "code": 200,
        "data": {
            "bot_name": "企业AI助手",
            "status": "configured",
            "features": ["消息对话", "文件处理", "任务通知", "工作流触发"],
        },
    }