const createError = require('http-errors');
const express = require('express');
const cookieParser = require('cookie-parser');
const bodyParser = require('body-parser');
const path = require('path')
const handleProxy = require('./handleProxy')

function createApp(port) {
    const app = express();
    app.set('views', path.join(__dirname, './../views'));
    app.set('view engine', 'pug');
    // app.use(expressLogger)
    app.use(express.json());
    app.use(express.urlencoded({ extended: false }));
    app.use(cookieParser());
    app.use(bodyParser.urlencoded({ limit: '100mb', extended: false }), bodyParser.json({ limit: '100mb' }));
    app.use(express.static(path.join(__dirname, './public')));
    app.use(require('./routes/login')) // 登录
    app.use(require('./routes/learn')) // 学习
    handleProxy(app, port)
    /** 核心业务：反代逻辑 */
    app.use(function (req, res, next) {
        next(createError(404));
    });
    app.disabled('etag'); // turn off
    app.use(function (err, req, res, next) {
        res.locals.message = err.message;
        res.locals.error = req.app.get('env') === 'development' ? err : {};
        res.status(err.status || 500);
        res.json(err);
    });
    app.listen(port, () => {
        console.log(`App is now running at ${port}`)
    })
    return app;
}

createApp(4000)