#!/usr/bin/env python3
"""启动本地静态服务并自动选择可用端口。"""

from __future__ import annotations

import argparse
import socket
import sys
import webbrowser
from functools import partial
from http.server import SimpleHTTPRequestHandler, ThreadingHTTPServer
from pathlib import Path


ROOT = Path(__file__).resolve().parents[1]


def available_port(start: int) -> int:
    for port in range(start, start + 20):
        with socket.socket() as probe:
            try:
                probe.bind(("127.0.0.1", port))
                return port
            except OSError:
                continue
    raise RuntimeError("8765 至 8784 均被占用")


def main() -> int:
    parser = argparse.ArgumentParser(description="启动三笙AI情报局本地站点")
    parser.add_argument("--port", type=int, default=8765)
    args = parser.parse_args()
    try:
        if not (ROOT / "dist" / "index.html").is_file():
            raise FileNotFoundError("dist/index.html 不存在，请先运行 update.bat")
        port = available_port(args.port)
        handler = partial(SimpleHTTPRequestHandler, directory=str(ROOT / "dist"))
        server = ThreadingHTTPServer(("127.0.0.1", port), handler)
        url = f"http://127.0.0.1:{port}/"
        print(f"[启动成功] {url}")
        webbrowser.open(url)
        server.serve_forever()
    except KeyboardInterrupt:
        print("\n[已停止] 本地服务已关闭")
        return 0
    except Exception as exc:
        print(f"[启动失败] {exc}", file=sys.stderr)
        return 1


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