#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
SenseCraft HMI 设备遥测客户端 —— 读 reTerminal E1002 自身上报的电量 / 温度 / 湿度。

接口：GET {SENSECRAFT_API_BASE}/api/v1/user/device/iot_data/{SENSECRAFT_DEVICE_EUI}，头 `api-key: <SENSECRAFT_API_KEY>`
（用户在 SenseCraft 后台生成的 API key，放 .env，不入库）。响应（2026-09-14 实测）：
  {"code":200,"result":{"battery":{"charging":true,"level":100},"sensor":{"humidity":42.9,"temp":30.3},
   "dataaccess":{"interval":300},"devicestatus":{"status":1},...},"message":"success"}
取值：result.battery.level（%）/ result.battery.charging / result.sensor.temp（℃）/ result.sensor.humidity（%）。
设备本身每 dataaccess.interval（300s）上报一次，故 DEVICE_TTL 取 300 与之同步即可。直连、不走代理，超时 10s。
密钥未配置直接抛错 → 上层回退占位 "--"。
"""
import json
import urllib.error
import urllib.request

import config

TIMEOUT = 10


def get_iot_data():
    """返回 {battery(int|None), charging(bool), temp(float|None), humidity(float|None)}；网络/鉴权失败抛出。"""
    if not config.SENSECRAFT_API_KEY or not config.SENSECRAFT_DEVICE_EUI:
        raise RuntimeError("未配置 SENSECRAFT_API_KEY / SENSECRAFT_DEVICE_EUI")
    url = f"{config.SENSECRAFT_API_BASE.rstrip('/')}/api/v1/user/device/iot_data/{config.SENSECRAFT_DEVICE_EUI}"
    req = urllib.request.Request(url, headers={"api-key": config.SENSECRAFT_API_KEY, "Accept": "application/json",
                                               "User-Agent": "eink-push/sensecraft_api"})
    opener = urllib.request.build_opener(urllib.request.ProxyHandler({}))
    try:
        with opener.open(req, timeout=TIMEOUT) as resp:
            body = json.loads(resp.read().decode("utf-8"))
    except urllib.error.HTTPError as e:
        raise RuntimeError(f"HTTP {e.code}：{e.read().decode('utf-8', 'replace')[:200]}") from e
    if body.get("code") != 200:
        raise RuntimeError(f"接口返回 code={body.get('code')} message={body.get('message')}")
    r = body.get("result") or {}
    bat, sen = r.get("battery") or {}, r.get("sensor") or {}
    return {"battery": _num(bat.get("level"), int), "charging": bool(bat.get("charging")),
            "temp": _num(sen.get("temp"), float), "humidity": _num(sen.get("humidity"), float)}


def _num(v, cast):
    try:
        return cast(v) if v is not None else None
    except (TypeError, ValueError):
        return None


if __name__ == "__main__":
    print(get_iot_data())