module.exports = function (grunt) {
	
	grunt.initConfig({
		pkg: grunt.file.readJSON('package.json'),
		webpack: {
			app: {
				entry: __dirname + '/app/index.jsx',
				output: {
					filename: 'bundle.js',
					path: __dirname + '/dist/app/',
				},
				resolve: {
					extensions: ['.js', '.jsx'],
				},
				module: {
					rules: [
						{
							test: /\.jsx?$/,
							exclude: /node_modules/,
							use: [
								{
									loader: 'babel-loader',
									options: {
										sourceMap: true,
										presets: [
											['env', {
												targets: {
													browsers: ['last 2 versions'],
												},
												modules: false,
											}],
											'react',
										],
									},
								},
							],
						},
						{
							test: /\.css$/,
							use: [
								'style-loader',
								{
									loader: 'css-loader',
									options: {
										sourceMap: true,
										modules: true,
										importLoaders: 1,
										localIdentName: '[name]--[local]--[hash:base64:8]',
									},
								},
								{
									loader: 'postcss-loader',
								},
							],
						},
					],
				},
			},
		},
		copy: {
			app: {
				files: [
					{
						expand: true,
						cwd: __dirname + '/app/',
						src: ['index.html'],
						dest: __dirname + '/dist/app/',
					},
					{
						expand: true,
						cwd: __dirname + '/app/',
						src: ['assets/**'],
						dest: __dirname + '/dist/app/assets/',
					},
					{
						expand: true,
						cwd: __dirname + '/node_modules/oidc-client/',
						src: ['dist/**'],
						dest: __dirname + '/dist/app/assets/oidc-client/',
					},
				],
			},
		},
		babel: {
			options: {
				sourceMap: true,
				presets: [
					[
						'env', 
						{
							targets: {
								node: 'current',
							},
							modules: 'commonjs',
						},
					],
				],
			},
			server: {
				files: [
					{
						expand: true,
						cwd: __dirname + '/server/',
						src: ['**/*.js'],
						dest: __dirname + '/dist/server/',
					},
				],
			},
		},
		eslint: {
			app: {
				files: [
					{
						expand: true,
						cwd: __dirname + '/app/',
						src: ['**/*.js*'],
						dest: __dirname + '/dist/app/',
					},
				],
			},
			server: {
				files: [
					{
						expand: true,
						cwd: __dirname + '/server/',
						src: ['**/*.js'],
						dest: __dirname + '/dist/server/',
					},
				],
			},
		},
		watch: {
			app: {
				files: '**/*.js*',
				tasks: ['app'],
				options: {
					cwd: __dirname + '/app/',
				},
			},
			server: {
				files: '**/*.js',
				tasks: ['server'],
				options: {
					cwd: __dirname + '/server/',
				},
			},
		},
	});

	grunt.loadNpmTasks('grunt-webpack');
	grunt.loadNpmTasks('grunt-babel');
	grunt.loadNpmTasks('grunt-eslint');
	grunt.loadNpmTasks('grunt-contrib-copy');
	grunt.loadNpmTasks('grunt-contrib-watch');

	grunt.registerTask('all', ['eslint', 'webpack', 'copy', 'babel']);
	grunt.registerTask('app', ['eslint:app', 'webpack:app', 'copy:app']);
	grunt.registerTask('server', ['eslint:server', 'babel:server']);
	grunt.registerTask('default', ['all']);

};