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

var port = process.argv[2] || 8888;
var dirs = {};
dirs = [".//png//", ".//jpg//", ".//html//", ".//js//"];
exts = ["png", "jpg", "html", "js"];

var myServer = http.createServer(function (req, res) {
    console.log('request starting:' + req.method + " " + req.url);
    //var dirName = path.dirname(req.url).toLowerCase();
    //var baseName = path.basename(req.url).toLowerCase();
    //var extName = path.extname(req.url).toLowerCase();

    // handling plain files .html/.js
    if (req.method.toLowerCase() === 'get') {
        var files = []
        var dir = 0;
        for (i = 0; i < exts.length; i++) {
            console.log(exts.length);
            if (req.url.toLowerCase() === '/' + exts[i]) {
                path.exists(exts[i], function (exists) {
                    if (!exists || fs.statSync(exts[i]).isFile()) {
                        console.log('dir for request ' + req.url.toLowerCase() + " not found");
                        res.writeHead(404);
                        res.end();
                        return;
                    }
                    files = fs.readdirSync(exts[i]);
                    console.log(files.length + ' files for request ' + req.url.toLowerCase() + " read");
                    dir = i;
                    res.writeHead(200, { 'Content-Type': 'application/octet-stream' });
                    var count = 0;
                    for (file in files) {
                        console.log("sending " + path.join(dirs[dir], files[file]));
                        fs.readFile(path.join(dirs[dir], files[file]), function (error, content) {
                            //console.log(path.join(dirs[dir], files[file]) + ' file');
                            if (error) {
                                res.writeHead(500);
                                res.end();
                                console.log("error");
                            }
                            else {

                                res.write(content);
                                //res.end(content, 'utf-8');
                                console.log("success");
                                count++;
                            }

                            if (count == files.length)
                            { res.end(); }
                        });


                    }
                    res.end();
                });
                console.log(exts.length);
                break;
            }
        }
        return;
    }

    // handling "POST /ocena/1..5" requests
    //if (req.method.toLowerCase() === 'post' && dirName === '/ocena') {
    //  sum = sum + parseInt(baseName);
    //  count++;
    //  currentAverage = sum/count;
    //}

    res.writeHead(404);
    res.end();
})
myServer.listen(parseInt(port, 10));
console.log("Static file server running at\n  => http://localhost:" + port + "/\nCTRL + C to shutdown")