const http = require('http')
const fs = require('fs')
const url = require('url')

var res = http.ServerResponse.prototype

res.sendFile = function (file) {
	fs.readFile(file, (err, data) => {
		if (!err) {
			console.log("here")
			this.writeHead(200, {
				'content-type': 'text/html; charset=utf-8'
			})
			this.end(data)
		}
		else
		{
			this.writeHead(404)
			this.end('file not found')
		}
	})
}


class myServer {
	constructor() {
		this._gets = {};
		this._posts = {};
		this._putss = {};
		this._deletes = {};
     
		this._server = http.createServer((req, res) => {

			const pathName = url.parse(req.url).pathname;

			if (req.method === "GET" && this._gets[pathName]) {
				this._gets[pathName](req, res);
			}
			else if (req.method === "POST" && this._posts[pathName]) {
				this._posts[pathName](req, res);
			}
			else if (req.method === "PUT" && this._puts[pathName]) {
				this._puts[pathName](req, res);
			}
			else if (req.method === "DELETE" && this._deletes[pathName]) {
				this._deletes[pathName](req, res);
			} else {
				res.writeHead(404)
				res.end('not found');
			}
		})   
	}

	get(url, callback)		{ this._gets[url] = callback; }
	post(url, callback)		{ this._posts[url] = callback; }
	add(url, callback)		{ this._puts[url] = callback; }
	delete(url, callback)	{ this._deletes[url] = callback; }

	listen(port, callback)	{ this._server.listen(port, callback) }
}

const myExpress = () => { return new myServer() }

module.exports = myExpress;