#!/usr/bin/env python3
"""从 /opt/live/config（或 LIVE_CONFIG_ROOT）JSON 配置生成 system-stack.env，供现有 service_ctl / install 脚本读取。"""
from __future__ import annotations

import json
import os
import sys
from pathlib import Path


def config_root() -> Path:
    env = os.environ.get("LIVE_CONFIG_ROOT", "").strip()
    if env:
        return Path(env)
    if Path("/opt/live/config/system.json").is_file():
        return Path("/opt/live/config")
    here = Path(__file__).resolve()
    return here.parent.parent / "config" / "defaults"


def load_json(path: Path) -> dict:
    if not path.is_file():
        return {}
    return json.loads(path.read_text(encoding="utf-8"))


def collect_env(root: Path) -> dict[str, str]:
    lines: dict[str, str] = {}

    sys_j = load_json(root / "system.json")
    web = sys_j.get("web_console") or {}
    ident = sys_j.get("identity") or {}
    if ident.get("hostname_alias"):
        lines["HOSTNAME_ALIAS"] = str(ident["hostname_alias"])
    if web.get("api_port") is not None:
        lines["PORT"] = str(web["api_port"])

    net = load_json(root / "network.json")
    wifi = net.get("wifi") or {}
    if wifi.get("connection_name"):
        lines["WIFI_CONNECTION_NAME"] = str(wifi["connection_name"])
    if wifi.get("ssid"):
        lines["WIFI_SSID"] = str(wifi["ssid"])
    if wifi.get("psk"):
        lines["WIFI_PSK"] = str(wifi["psk"])
    if net.get("ipv6", {}).get("disable"):
        lines["DISABLE_IPV6"] = "1"

    svc_dir = root / "services"
    if svc_dir.is_dir():
        for f in sorted(svc_dir.glob("*.json")):
            data = load_json(f)
            env = data.get("env") or {}
            if not isinstance(env, dict):
                continue
            for k, v in env.items():
                if v is not None and str(v) != "":
                    lines[str(k)] = str(v)

    ports = {}
    if svc_dir.is_dir():
        for f in sorted(svc_dir.glob("*.json")):
            data = load_json(f)
            pid = data.get("id") or f.stem
            pr = data.get("ports") or {}
            if isinstance(pr, dict) and "http" in pr:
                ports[pid] = pr["http"]
    # 固定映射：homepage 使用 HOMEPAGE_PORT
    if "homepage" in ports:
        lines.setdefault("HOMEPAGE_PORT", str(ports["homepage"]))

    lines.setdefault("ENABLE_MDNS", "1")
    lines.setdefault("ENABLE_WIFI_PROFILE", "1")
    lines.setdefault("ENABLE_BROWSER", "1")
    lines.setdefault("ENABLE_COCKPIT", "1")
    return lines


def main() -> int:
    root = config_root()
    out = Path(os.environ.get("LIVE_ENV_OUT", "/opt/live/generated/system-stack.env"))
    if len(sys.argv) > 1:
        out = Path(sys.argv[1])
    lines = collect_env(root)
    out.parent.mkdir(parents=True, exist_ok=True)
    body = "\n".join(f"{k}={v}" for k, v in sorted(lines.items())) + "\n"
    out.write_text(
        "# Generated by live-platform/tools/render_stack_env.py — do not hand-edit\n" + body,
        encoding="utf-8",
    )
    # 开发树：可选同步到仓库 config（由 install 脚本 ln -sf）
    print(str(out))
    return 0


if __name__ == "__main__":
    raise SystemExit(main())