import express from 'express';
import path from 'path';
import { fileURLToPath } from 'url';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const app = express();
// 默认端口 8080，但优先遵循 Cloud Run 的 PORT 环境变量
const PORT = process.env.PORT || 8080;

// 托管构建后的静态文件目录
const distPath = path.join(__dirname, 'dist');

app.use(express.static(distPath));

// 处理 SPA 路由，将所有请求重定向到 index.html
app.get('*', (req, res) => {
  res.sendFile(path.join(distPath, 'index.html'));
});

app.listen(PORT, '0.0.0.0', () => {
  console.log(`SocioPal is running on port ${PORT}`);
  console.log(`Serving static files from: ${distPath}`);
});