import { readFileSync } from 'fs';
import { join } from 'path';
import { request, getOptions, postOptions } from './utils/request';

/**
 * 对象的深度克隆
 * @param {*object} obj 
 */
const clone = (obj) => {
 // Handle the 3 simple types, and null or undefined
 if (null == obj || "object" != typeof obj) return obj;
 
 // Handle Date
 if (obj instanceof Date) {
 const copy = new Date();
 copy.setTime(obj.getTime());
 return copy;
 }
 
 // Handle Array
 if (obj instanceof Array) {
 const copy = [];
 for (let i = 0; i < obj.length; i++) {
 copy[i] = clone(obj[i]);
 }
 return copy;
 }
 
 // Handle Object
 if (obj instanceof Object) {
 var copy = {};
 for (var attr in obj) {
 if (obj.hasOwnProperty(attr)) copy[attr] = clone(obj[attr]);
 }
 return copy;
 }
 
 throw new Error("Unable to copy obj! Its type isn't supported.");
}

export default function (req, res, next) {
 switch (req.url) {
 case '/api/account/login':
 doapi(req.url, postOptions(req), (data) => {
 // 克隆对象用于返回调用方
 var copy = clone(data);
 if (data.success) {
 var user = data.data;
 user.menus = null; //将菜单信息清除然后保存到session
 req.session.user = user;
 }
 res.send(copy);
 });
 break;
 case '/api/account/logout':
 if (req.session.user) {
 req.body.guid = req.session.user.guid;
 doapi(req.url, postOptions(req), (data) => {
 if (data.success) {
 req.session.user = undefined;
 }
 res.send(data);
 });
 } else {
 res.send({ message: '注销成功.', success: true });
 }
 break;
 case '/api/user/getloginuser':
 if (req.session.user) {
 res.send({ success: true, message: '获取成功!', data: req.session.user });
 } else {
 res.send({ message: '未登录!', success: false });
 }
 break;
 case '/api/article/savearticle':
 if (req.session.user) {
 req.body.UserGuid = req.session.user.userGuid;
 doapi(req.url, postOptions(req), (data) => {
 res.send(data);
 });
 } else {
 res.send({ message: '未登录!', code: -1, success: false });
 }
 break;
 default:
 const user = req.session.user;
 // 如果身份过期则跳转至登录页
 if (user === undefined && req.url.indexOf('/login') === -1) {
 res.redirect(`/login?from=${req.url}`);
 } else {
 if (req.url.indexOf('/api') > -1) {
 if (req.url.indexOf('/login') > -1) {
 res.send({
 statusCode: 401,
 message: '身份过期,请重新登录.',
 success: false,
 data: req.url
 });
 return;
 }
 if (req.method == "POST") {
 doapi(req.url, postOptions(req), (data) => {
 res.send(data);
 });
 }
 if (req.method == "GET") {
 doapi(req.url, getOptions(req), (data) => {
 res.send(data);
 });
 }
 } else {
 next();
 }
 }
 break;
 }
}

function doapi(url, options, callback) {
 request(url, options)
 .then(data => {
 callback(data);
 });
}