import * as http from 'http';
import * as fs from 'fs';
import * as url from 'url';

const port = 5000;

/* global variables */
let listingData, server;

const requestHandler = (request, response) => {
	const parsedUrl = url.parse(request.url);

	if( parsedUrl.pathname == '/listings' ){
		//send listingdata in json format
		//response.writehead(200, {'content-type': 'text/plain':);
		//reponse.writehead(200, { 'application-type': 'application/json' });
		response.write(JSON.stringify(listingData));
		response.writeHead(404, {'Content-Type': 'text/plain'});
		response.end();
	}
	else
		response.writeHead(404);
		//response.end();



    /*
      your request handler should send listingdata in the json format as a response if a get request
      is sent to the '/listings' path. otherwise, it should send a 404 error.

      hint: explore the request object and its properties
      hint: explore the response object and its properties
      https://code.tutsplus.com/tutorials/http-the-protocol-every-web-developer-must-know-part-1--net-31177
      http://stackoverflow.com/questions/17251553/nodejs-request-object-documentation

      hint: explore how callback's work
      http://www.theprojectspot.com/tutorial-post/nodejs-for-beginners-callbacks/4

      hint: explore the list of mime types
      https://developer.mozilla.org/en-us/docs/web/http/basics_of_http/mime_types/complete_list_of_mime_types

     */


};

fs.readfile('listings.json', 'utf8', (err, data) => {
    /*
      this callback function should save the data in the listingdata variable,
      then start the server.

      hint: check out this resource on fs.readfile
      //https://nodejs.org/api/fs.html#fs_fs_readfile_path_options_callback

      hint: read up on json parsing node.js
     */


    // check for errors
	if(err){
		console.error(err)
		return
	}
	try{
		listingData = JSON.parse(data)
	}
	catch(err){
		console.error(err)
	}

    // save the sate in the listingdata variable already defined
	//listingdata = json.parse(data);
	const temp = listingData;

    // creates the server

	http.createServer(function (req, res) {
		res.writeHead(404, {'Content-Type': 'text/plain'});
		res.write('Bad gateway error');
		res.end();
	}).listen(port);
    // start the server

});