// 环境变量
const arg = require('arg');
const args = arg({
    '--node_env': String, // 环境
});
const node_env = args['--node_env'];
process.env.NODE_ENV = node_env;


// 全局变量
global.default_config = require('./default_config');
const createError = require('http-errors');
const httpProxy = require('express-http-proxy');
const proxyConfig = require('./proxy');
const express = require('express');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
// const multer = require('./middleware/multer')
const indexRouter = require('./routes/index');
//test git caipeng
var app = express();
app.all("*",function(req,res,next){
    //设置允许跨域的域名，*代表允许任意域名跨域
    res.header("Access-Control-Allow-Origin","*");
    //允许的header类型
    res.header("Access-Control-Allow-Headers","content-type");
    //跨域允许的请求方式
    res.header("Access-Control-Allow-Methods","DELETE,PUT,POST,GET,OPTIONS");
    if (req.method.toLowerCase() === 'options')
        res.send(200);  //让options尝试请求快速结束
    else
        next();
});

// 代理静态资源
app.use('/public', express.static(default_config.public_path));
// 代理接口
for(let api in proxyConfig) {
    let config = proxyConfig[api];
    app.use(api, httpProxy(config.target, config));
}
// app.use(multer);
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

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);

// 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;