const express = require('express');
const { createProxyMiddleware } = require('http-proxy-middleware');
const app = express();
const path = require('path');
const fs = require('fs');
const config = require(path.join(__dirname, '../dist/config'));

// proxy 中间件的选择项
const options = {
    target: config.INTERFACE_SERVER_PATH, // 目标服务器 host
    changeOrigin: true, // 默认false，是否需要改变原始主机头为目标URL
    // ws: true,                         		// 是否代理websockets
    pathRewrite: {
        '^/app': '/app', // 重写请求，比如我们源访问的是api/old-path，那么请求会被解析为/api/new-path
    },
    logLevel: 'debug',
    onProxyReq: (proxyReq, req, res) => {
        console.log('fasongqingqiu')
        proxyReq.setHeader('X-Forwarded-For', getClientIp(req));
    },
    onError: (err, req, res) => {
        res.writeHead(500, {
            'Content-Type': 'text/plain',
        });
        res.end('Something went wrong. And we are reporting a custom error message.');
    }
};

const exampleProxy = createProxyMiddleware(options);
const staticPath = config.NODE_ENV == 'production' ? '../dist/prod' : config.NODE_ENV == 'test' ? '../dist/test' : '../dist/dev';
app.use(express.static(path.join(__dirname, staticPath), { index: "" }));

app.use('/app', exampleProxy);
// app.get('*', function(req, res) {
//     let PcUrlBrief = '51huishen.com';
//     let PcUrl = 'www.51huishen.com';
//     let MobileUrl = 'm.51huishen.com';
//     //获取当前url地址
//     let url = req.get('host')
//     let deviceAgent = req.headers["user-agent"].toLowerCase();
//     let agentID = deviceAgent.match(/(iphone|ipod|ipad|android)/);
//     if (agentID) {
//         //移动端
//         if (url == PcUrl || url == PcUrlBrief) {
//             res.redirect('https://' + MobileUrl + req.url);
//             return;
//         }
//     } else {
//         //pc端
//         if (url == MobileUrl) {
//             res.redirect('https://' + PcUrl + req.url);
//             return;
//         }
//     }
//     const indexPath = config.NODE_ENV == 'production' ? '../dist/prod/index.html' : config.NODE_ENV == 'test' ?
//         '../dist/test/index.html' : '../dist/dev/index.html';
//     const html = fs.readFileSync(path.resolve(__dirname, indexPath), 'utf-8');
//     res.send(html);

//     // res.sendFile(path.join(__dirname, '../dist/index.html'));
// });
app.get('*', function(req, res) {
    const indexPath = config.NODE_ENV == 'production' ? '../dist/prod/index.html' : config.NODE_ENV == 'test' ?
        '../dist/test/index.html' : '../dist/dev/index.html';
    const html = fs.readFileSync(path.resolve(__dirname, indexPath), 'utf-8');
    res.send(html);
});
app.listen(config.APP_SERVER_PORT, '0.0.0.0', function(err) {
    if (err) {
        console.log('start failed：' + err);
    } else {
        console.log('start success ...');
    }
});

let getClientIp = function(req) {
    return req.headers['X-Forwarded-For'] ||
        req.connection.remoteAddress ||
        req.socket.remoteAddress ||
        req.connection.socket.remoteAddress || '';
};