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

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

//const server = http.createServer((req, res) => {
//
//	let pathName = url.parse(req.url).pathname
//
//	if (req.method === "GET") {
//		if (pathName === "/")
//			sendFile(__dirname + "/index.html", res)
//		else
//		{
//			res.writeHead(404)
//			res.end('wrong url')
//		}
//	}
//})

class customServer {
	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._gets[pathName](req, res);
			}
			else if (req.method === "PUT" && this._puts[pathName]) {
				this._gets[pathName](req, res);
			}
			else if (req.method === "DELETE" && this._deletes[pathName]) {
				this._gets[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 server = new customServer();
server.get("/", (req, res) => sendFile(__dirname + "/index.html", res));

const port = 3001;
//server.listen(port);
server.listen(port, console.log(`listening on port ${port}`));