#!/usr/bin/env python3
"""生成 Caddy 配置：HTTP :80 → 本机 FastAPI+静态（PORT，默认 8001）。"""
from __future__ import annotations

import json
import sys
from pathlib import Path


def main() -> int:
    alias = "live"
    port = "8001"
    out = Path("/opt/live/generated/Caddyfile")

    cfg = Path("/opt/live/config/system.json")
    if cfg.is_file():
        data = json.loads(cfg.read_text(encoding="utf-8"))
        ident = data.get("identity") or {}
        web = data.get("web_console") or {}
        alias = str(ident.get("hostname_alias") or alias)
        if web.get("api_port") is not None:
            port = str(web["api_port"])

    if len(sys.argv) >= 2:
        alias = sys.argv[1]
    if len(sys.argv) >= 3:
        port = sys.argv[2]
    if len(sys.argv) >= 4:
        out = Path(sys.argv[3])

    host = f"{alias}.local"
    body = f"""# Generated by live-platform/tools/render_caddyfile.py - do not hand-edit
# http://{host}/ and http://<LAN-IP>/ -> 127.0.0.1:{port}

{host}:80, :80 {{
\treverse_proxy 127.0.0.1:{port}
}}
"""
    out.parent.mkdir(parents=True, exist_ok=True)
    out.write_text(body, encoding="utf-8")
    print(str(out))
    return 0


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