'use strict';

const
		webpack = require('webpack'),
		uglify = require("uglify-js"),
		path = require('path'),
		fs = require('fs'),
		MemoryFS = require('memory-fs'),

		BASE_PATHS = {
			RESOURCES: 'src/main/webapp/resources/',
			CONTROLLERS: 'src/main/webapp/resources/js/controllers/',
		},

		WEBPACK_CONFIGURATION = {
			name: 'eonline-mobile',
			entry: {
				apps: path.join(__dirname, BASE_PATHS.CONTROLLERS + 'more/apps.js'),
				gallery: path.join(__dirname, BASE_PATHS.CONTROLLERS + 'photos/gallery.js')
			},
			output: {

				pathinfo: false,
				libraryTarget: 'umd',

				path: '/' /*path.join(__dirname, BASE_PATHS.RESOURCES, 'bundle')*/,
				filename: '[name].js'
			},
			devtool: 'source-map'
		};


const mfs = new MemoryFS();

/**
 * @type {Compiler}
 */
const compiler = webpack(WEBPACK_CONFIGURATION);
compiler.outputFileSystem = mfs;

const filesInMemory = [];

const FileById = function (name, data) {
	this.name = name;
	this.data = data;
};

compiler.run((error, stats) =>
{
	console.log('webpack: bundle complete');

	console.assert((error == null), error);

	if (mfs.data) {

		Object.keys(mfs.data).forEach((item) => {

			if (item.indexOf('.map') === -1) {

				const content = mfs.readFileSync(path.join('/', item),'utf8');

				console.log('memory file sync complete for ', item);

				const ast = uglify.minify(
				{
					item: content
				},
				{
					fromString: true,
					warnings: false,
					mangleProperties: true,
					compress: {
						unsafe: true,
						collapse_vars: true,
						passes: 3,
						reduce_vars: true,
						join_vars: true,
						if_return: true,
						booleans: true
					}
				});

				console.log('uglify: compression complete for ', item);

				filesInMemory.push(new FileById(item, ast.code));
			}
		});
	}

	if (filesInMemory.length) {
		writeCodeToFile(0);
	}

});

function writeCodeToFile(index)
{
	if (filesInMemory[index])
	{
		console.log('write file #', index+1);

		var fileInMemory = filesInMemory[index];

		fs.writeFile(fileInMemory.name, fileInMemory.data, null, () => {
			writeCodeToFile(index + 1);
		});
	}
}