var http = require("http"),
    url = require("url"),
    path = require("path"),
    fs = require("fs"),
    port = process.argv[2] || 8888;

http.createServer(function (request, response) {
    var string = '';

    request.on('data', function (data) {
        string += data;
    });

    request.on('end', function () {
        var array = JSON.parse(string);
        if (array[0] == 'read') {
            getFile(array[1]);
            return;
        }
        if (array[0] == 'write') {
            uploadUpdateFile(array[1], array[2]);
            return;
        }
    });

    function uploadUpdateFile(file, content) {
        var path = 'public/upload/' + file + '.json',
            stringifyContent = JSON.stringify(content);

        fs.writeFile(path, stringifyContent, function (err) {
            if (err) {
                console.log(err);
            } else {
                console.log('File is saved!!!');
            }
        });
    }

    function getFile(currentFile) {
        var uri = url.parse(request.url).pathname,
            filename = path.join(process.cwd(), uri);

        path.exists(filename, function (exists) {
            if (!exists) {
                response.writeHead(404, { "Content-Type": "text/plain" });
                response.write("404 Not Found\n");
                response.end();
                return;
            }
            if (fs.statSync(filename).isDirectory()) filename += '/public/get/' + currentFile + '.json';

            fs.readFile(filename, function (err, data) {
                if (err) {
                    response.writeHead(500, { "Content-Type": "text/plain" });
                    response.write(err + "\n");
                    response.end();
                    return;
                }

                response.writeHead(200);
                response.write(data, "binary");
                response.end();
            });
        });
    }


    response.setHeader("Access-Control-Allow-Origin", "*");
    response.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");
    response.setHeader("Access-Control-Allow-Headers", "Content-Type");
    response.setHeader("Access-Control-Max-Age", "1800");//30 min


}).listen(parseInt(port, 10));


console.log("Static file server running at\n  => http://localhost:" + port + "/\nCTRL + C to shutdown");