import fs from 'node:fs';
import path from 'node:path';
import { defineConfig } from 'vite';

const DEV_PUBLIC_HOST = 'shell.biboer.cn';
const DEV_CERT_PATH =
  '/Users/gavin/.acme.sh/shell.biboer.cn_ecc/fullchain.cer';
const DEV_KEY_PATH =
  '/Users/gavin/.acme.sh/shell.biboer.cn_ecc/shell.biboer.cn.key';
const TERMINAL_CONFIG_FILE = path.resolve(process.cwd(), 'terminal.config.json');

function readTLSFile(path: string): Buffer {
  if (!fs.existsSync(path)) {
    throw new Error(`开发证书文件不存在: ${path}`);
  }
  return fs.readFileSync(path);
}

export default defineConfig({
  plugins: [
    {
      name: 'serve-terminal-config',
      configureServer(server) {
        // 开发态从仓库根目录实时读取 terminal.config.json，避免手动复制到 public。
        server.middlewares.use((req, res, next) => {
          const reqPath = (req.url || '').split('?')[0];
          if (reqPath !== '/terminal.config.json') {
            next();
            return;
          }

          if (!fs.existsSync(TERMINAL_CONFIG_FILE)) {
            res.statusCode = 404;
            res.setHeader('Content-Type', 'application/json; charset=utf-8');
            res.end(
              JSON.stringify({
                error: 'terminal.config.json 不存在',
                path: TERMINAL_CONFIG_FILE,
              }),
            );
            return;
          }

          const content = fs.readFileSync(TERMINAL_CONFIG_FILE, 'utf8');
          res.statusCode = 200;
          res.setHeader('Cache-Control', 'no-store');
          res.setHeader('Content-Type', 'application/json; charset=utf-8');
          res.end(content);
        });
      },
    },
  ],
  server: {
    host: '0.0.0.0',
    port: 5173,
    strictPort: true,
    allowedHosts: [DEV_PUBLIC_HOST],
    https: {
      cert: readTLSFile(DEV_CERT_PATH),
      key: readTLSFile(DEV_KEY_PATH),
    },
    hmr: {
      protocol: 'wss',
      host: DEV_PUBLIC_HOST,
      port: 5173,
    },
    proxy: {
      // 浏览器通过 https://shell.biboer.cn:5173 访问时，这里将 wss 升级请求转发到本地网关。
      '/ws/terminal': {
        target: 'ws://127.0.0.1:8787',
        ws: true,
        changeOrigin: true,
      },
      '/ws/asr': {
        target: 'ws://127.0.0.1:8787',
        ws: true,
        changeOrigin: true,
      },
    },
  },
});