# -*- coding: utf-8 -*-
"""本机激活信息：通用包首次激活后写入 device.json。"""
from __future__ import annotations

import json
import os
import platform
import uuid
from pathlib import Path
from typing import Any, Optional

APP_DIR = Path(os.environ.get("GOLD_MONITOR_DATA", Path.home() / ".gold_monitor"))
DEVICE_FILE = APP_DIR / "device.json"


def ensure_dir() -> None:
    APP_DIR.mkdir(parents=True, exist_ok=True)


def machine_fingerprint() -> str:
    """相对稳定的本机指纹（非绝对防伪，够用区分机器）。"""
    node = uuid.getnode()
    name = platform.node() or "pc"
    return f"{name}-{node:012x}"


def load_device() -> dict[str, Any]:
    ensure_dir()
    if not DEVICE_FILE.is_file():
        return {
            "server": "",
            "token": "",
            "account_id": None,
            "machine_id": None,
            "fingerprint": machine_fingerprint(),
            "machine_name": platform.node() or "PC",
        }
    try:
        data = json.loads(DEVICE_FILE.read_text(encoding="utf-8"))
    except (OSError, json.JSONDecodeError):
        data = {}
    data.setdefault("fingerprint", machine_fingerprint())
    data.setdefault("machine_name", platform.node() or "PC")
    data.setdefault("server", "")
    data.setdefault("token", "")
    return data


def save_device(data: dict[str, Any]) -> None:
    ensure_dir()
    DEVICE_FILE.write_text(json.dumps(data, ensure_ascii=False, indent=2), encoding="utf-8")


def is_activated() -> bool:
    d = load_device()
    return bool(d.get("token") and d.get("server"))


def clear_activation() -> None:
    d = load_device()
    d["token"] = ""
    d["account_id"] = None
    d["machine_id"] = None
    save_device(d)