var fs = require('fs');
var http = require('http');
var path = require('path');

http.createServer(function (req,res){

    var filePath = "." + req.url;
    if (filePath == './') {
        filePath = './index.html';
    }


    fs.readFile(filePath, function(error, content) {

        if (error) {
            if(error.code == 'ENOENT'){ // pusta tablica, w przypadku braku folderu lub pliku
                var array = {};
                res.writeHead(200, { 'Content-Type': 'application/json' });
                res.end(JSON.stringify(array), 'utf-8');

            }
            else {
                res.writeHead(500, {'Content-Type' : 'text/html'});
                res.end("Wystapil niespodziewany problem");
            }
        }
        else {

            var extName = path.extname(filePath); // pobranie rozszerzenia pliku
            /* var fileSize = fs.statSync(filePath).size; // pobranie rozmiaru pliku */
            var fileName = path.basename(filePath,extName); // pobranie nazwy pliku (bez rozszerzenia)
            var dir = path.dirname(filePath); // pobieranie ścieżki (bez nazwy pliku i jego rozszerzenia)


            var filePath2=[];
            var extName1=[".epub", ".mobi", ".pdf"];
            var fileSize=[];

            for (var i=0; i<3; i++){
                filePath2[i] = dir + "/" + fileName + extName1[i];
                fileSize[i] = fs.statSync(filePath2[i]).size;
            }

            /*

            var extName1 = ".epub";
            var extName2 = ".mobi";
            var extName3 = ".pdf";

            var filePath1 = dir + "/" + fileName + extName1;
            var filePath2 = dir + "/" + fileName + extName2;
            var filePath3 = dir + "/" + fileName + extName3;
            console.log(filePath1);

            var fileSize1 = fs.statSync(filePath1).size;
            var fileSize2 = fs.statSync(filePath2).size;
            var fileSize3 = fs.statSync(filePath3).size;

            */

            var array = {
                epub :
                    {
                        Name : fileName,
                        Extension : extName1[0],
                        SizeInBytes : fileSize[0],
                    },
                mobi :
                    {
                        Name : fileName,
                        Extension : extName1[1],
                        SizeInBytes : fileSize[1]
                    },
                pdf :
                    {
                        Name : fileName,
                        Extension : extName1[2],
                        SizeInBytes : fileSize[2]
                    }

            };

            res.writeHead(200, {'Content-Type': 'application/json'});
            res.end(JSON.stringify(array), 'utf-8');
        }

    });

}).listen(4444);