//不建议使用，看起来不友好 。
// var createError = require('http-errors');


//express
var express = require('express');
//path
var path = require('path');

//cookie
var cookieParser = require('cookie-parser');

var logger = require('morgan');

//首页模块
var indexRouter = require('./routes/index');
//列表页
var listRouter = require('./routes/list');
//登录注册页
var loginRouter = require('./routes/login');
//详情页
var detailRouter = require('./routes/detail');
//个人中心页
var personcenterRouter = require('./routes/personcenter');


//实例化app
var app = express();

//解决跨域问题
const cors = require('cors')
app.use(cors())

// view engine setup 设置ejs
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev')); //每次请求会在控制输出一个日志

//开启post中间件
app.use(express.json());
app.use(express.urlencoded({ extended: false }));

//开启cookie
app.use(cookieParser());

//开启静态
app.use('/public', express.static(path.join(__dirname, 'public')));

//开放的后期上传文件的文件夹
app.use('/uploads', express.static(path.join(__dirname, 'uploads')));

//使用路由
app.use('/api', indexRouter);
app.use('/api', listRouter);
app.use('/api', loginRouter);
app.use('/api', detailRouter);
app.use('/api', personcenterRouter);


// catch 404 and forward to error handler
app.use(function(req, res, next) {
    //next(createError(404));
    res.status(404).send('my is 404 page')
});

// error handler 统一数据处理
app.use(function(err, req, res, next) {

    res.send('这是统一数据处理')

    // set locals, only providing error in development
    // res.locals.message = err.message;
    // res.locals.error = req.app.get('env') === 'development' ? err : {};

    // // render the error page
    // res.status(err.status || 500);
    // res.render('error');
});

module.exports = app;