import httpx
import json

from app.config import settings
from app.utils.redis_client import get_json, set_json


async def get_access_token() -> str | None:
    if not settings.wx_appid or not settings.wx_secret:
        return None

    cache_key = "wx:access_token"
    cached = await get_json(cache_key)
    if cached:
        try:
            return json.loads(cached).get("access_token")
        except json.JSONDecodeError:
            pass

    url = "https://api.weixin.qq.com/cgi-bin/token"
    params = {
        "grant_type": "client_credential",
        "appid": settings.wx_appid,
        "secret": settings.wx_secret,
    }
    async with httpx.AsyncClient() as client:
        response = await client.get(url, params=params)
        data = response.json()
    access_token = data.get("access_token")
    expires_in = int(data.get("expires_in", 7200))
    if access_token:
        await set_json(cache_key, json.dumps({"access_token": access_token}), ex=max(expires_in - 300, 60))
    return access_token


async def send_audit_result(openid: str, passed: bool, remark: str = "") -> None:
    if not openid or not settings.wx_template_audit_result:
        return
    access_token = await get_access_token()
    if not access_token:
        return

    url = f"https://api.weixin.qq.com/cgi-bin/message/subscribe/send?access_token={access_token}"
    payload = {
        "touser": openid,
        "template_id": settings.wx_template_audit_result,
        "miniprogram_state": "developer",
        "lang": "zh_CN",
        "data": {
            "thing1": {"value": "资料审核结果通知"},
            "phrase2": {"value": "审核通过" if passed else "审核未通过"},
            "thing3": {"value": remark or ("恭喜，您的资料已通过审核" if passed else "请根据提示修改后重新提交")},
        },
    }
    async with httpx.AsyncClient() as client:
        await client.post(url, json=payload)


async def send_match_success(openid: str, other_nickname: str) -> None:
    if not openid or not settings.wx_template_match_success:
        return
    access_token = await get_access_token()
    if not access_token:
        return

    url = f"https://api.weixin.qq.com/cgi-bin/message/subscribe/send?access_token={access_token}"
    payload = {
        "touser": openid,
        "template_id": settings.wx_template_match_success,
        "page": "pages/my-matches/my-matches",
        "miniprogram_state": "developer",
        "lang": "zh_CN",
        "data": {
            "name3": {"value": other_nickname or "新匹配对象"},
            "thing4": {"value": "你们互相感兴趣，快去查看匹配详情吧"},
        },
    }
    async with httpx.AsyncClient() as client:
        await client.post(url, json=payload)