'use strict'

var http = require('http');
var fs = require('fs');
var Promise = require('es6-promise').Promise;

module.exports = {

    downloadedCount: 0,

    downloadedSize: 0,

    /**
     *
     */
    mkdir: function(path) {
        try {
            fs.mkdirSync(path);
        } catch(e) {
            if (e.code !== 'EEXIST'){
                console.log(e);
            }
        }
    },

    /**
     *
     */
    download: function(url, filename) {
        return new Promise(function(resolve, reject) {
            var file = fs.createWriteStream(filename);

            http.get(url, function(response) {
                var pipe = response.pipe(file);

                pipe.on('finish', function() {
                    module.exports.downloadedSize += pipe.bytesWritten;
                    module.exports.downloadedCount++;

                    console.log(url + ' --> ' + filename + ' --> ' + pipe.bytesWritten + ' bytes | ' + module.exports.downloadedSize + ' bytes total | ' + module.exports.downloadedCount + ' file(s)');

                    resolve(pipe.bytesWritten);
                });
            });
        });
    }
};