var createError = require('http-errors');
// 引入express
var express = require('express');
// 引入path
var path = require('path');
// 引入cookieParser
var cookieParser = require('cookie-parser');
// 引入ogger
var logger = require('morgan');
// 引入ejs
var ejs = require("ejs");
// 创建一级路由
var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
// 实例化express
var app = express();

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

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // 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;