// 简单的Node.js测试服务器
// 使用方法：node start-test-server.js

const http = require('http');
const fs = require('fs');
const path = require('path');
const { URL } = require('url');

// 后端地址
const BACKEND_HOST = 'localhost';
const BACKEND_PORT = 8080;

// 前端目录
const FRONTEND_DIR = path.join(__dirname, 'RuoYi-Vue3', 'dist');

// 创建HTTP服务器
const server = http.createServer((req, res) => {
    const reqUrl = new URL(req.url, `http://${req.headers.host}`);

    console.log(`${new Date().toISOString()} ${req.method} ${req.url}`);

    // API代理
    if (reqUrl.pathname.startsWith('/prod-api/')) {
        proxyRequest(req, res, reqUrl);
        return;
    }

    // 静态文件
    let filePath = path.join(FRONTEND_DIR, reqUrl.pathname === '/' ? 'index.html' : reqUrl.pathname);

    // 如果文件不存在，返回index.html（SPA路由）
    if (!fs.existsSync(filePath)) {
        filePath = path.join(FRONTEND_DIR, 'index.html');
    }

    // 读取文件
    fs.readFile(filePath, (err, data) => {
        if (err) {
            res.writeHead(404);
            res.end('File not found');
            return;
        }

        // 设置Content-Type
        const ext = path.extname(filePath);
        const contentTypes = {
            '.html': 'text/html',
            '.js': 'application/javascript',
            '.css': 'text/css',
            '.json': 'application/json',
            '.png': 'image/png',
            '.jpg': 'image/jpeg',
            '.gif': 'image/gif',
            '.svg': 'image/svg+xml',
            '.ico': 'image/x-icon'
        };

        res.setHeader('Content-Type', contentTypes[ext] || 'application/octet-stream');
        res.writeHead(200);
        res.end(data);
    });
});

// 代理请求到后端
function proxyRequest(req, res, reqUrl) {
    const options = {
        hostname: BACKEND_HOST,
        port: BACKEND_PORT,
        path: req.url,
        method: req.method,
        headers: req.headers
    };

    const proxyReq = http.request(options, (proxyRes) => {
        res.writeHead(proxyRes.statusCode, proxyRes.headers);
        proxyRes.pipe(res);
    });

    proxyReq.on('error', (err) => {
        console.error('Proxy error:', err);
        res.writeHead(502);
        res.end('Bad Gateway');
    });

    req.pipe(proxyReq);
}

// 启动服务器
const PORT = 8088;
server.listen(PORT, () => {
    console.log('========================================');
    console.log('测试服务器已启动');
    console.log('========================================');
    console.log(`前端地址: http://localhost:${PORT}`);
    console.log(`后端地址: http://${BACKEND_HOST}:${BACKEND_PORT}/prod-api`);
    console.log('========================================');
    console.log('请在浏览器中打开: http://localhost:8088');
    console.log('========================================');
    console.log('按 Ctrl+C 停止服务器');
});