// 打包 web/main.ts → web/dist/app.js（IIFE，可 file:// 直接打开）。
// --serve 时起本地服务并监听改动，手机同一 Wi-Fi 下访问启动时打印的地址。
// 端口：--port 4000 或 PORT=4000，不给就从 8100 起自动找空闲端口。
import * as esbuild from 'esbuild';
import { networkInterfaces } from 'node:os';

const argv = process.argv.slice(2);
const serve = argv.includes('--serve');
const portArg = argv[argv.indexOf('--port') + 1];
const port = argv.includes('--port') ? Number(portArg) : process.env.PORT ? Number(process.env.PORT) : 8100;

const ctx = await esbuild.context({
  entryPoints: ['web/main.ts'],
  bundle: true,
  format: 'iife',
  target: ['es2020'],
  outfile: 'web/dist/app.js',
  sourcemap: serve ? 'inline' : false,
  minify: !serve,
  logLevel: 'info',
  loader: { '.json': 'json' },
});

if (!serve) {
  await ctx.rebuild();
  await ctx.dispose();
} else {
  await ctx.watch();
  const served = await ctx.serve({ servedir: 'web', host: '0.0.0.0', port });
  let lan = [];
  try {
    lan = Object.values(networkInterfaces())
      .flat()
      .filter((i) => i && i.family === 'IPv4' && !i.internal)
      .map((i) => i.address);
  } catch {
    // 受限环境拿不到网卡列表，只打印 localhost
  }
  console.log(`\n  本机:   http://localhost:${served.port}/`);
  for (const ip of lan) console.log(`  手机:   http://${ip}:${served.port}/`);
  console.log(`  (监听 ${served.host}:${served.port}，改动自动重新打包，刷新页面即可)\n`);
}