require('require-yaml');
const webpack = require('webpack');
const path = require('path');
const merge = require('webpack-merge');
const AssetsWebpackPlugin = require('assets-webpack-plugin');
const wpConfig = require('./webpack.config.yml');

let env = process.env.NODE_ENV ? process.env.NODE_ENV : 'development';
let devMode = env === 'development';
let outputPath = path.join(__dirname, wpConfig.buildDir);

let baseConfig = {
    entry: wpConfig.entry,
    output: {
        path: outputPath,
        publicPath: `${wpConfig.publicPath}/`
    },
    module: {
        rules: [
            {
                test: /\.js$/,
                loader: 'babel-loader',
                exclude: /node_modules/,
                query: {
                    presets: ['es2015']
                }
            }, {
                test: /\.yml$/,
                loader: 'json-loader!yaml-loader'
            }, {
                test: /\.html$/,
                loader: 'html-loader'
            }, {
                test: /\.css$/,
                loader: 'style-loader!css-loader'
            }, {
                test: /\.scss$/,
                loader: 'style-loader!css-loader!sass-loader'
            }, {
                test: /\.(svg|png|ttf|woff|woff2)$/,
                loader: 'file-loader'
            }
        ]
    },
    resolve: {
        modules: [
            `${__dirname}/client`,
            __dirname,
            'node_modules'
        ]
    },
    plugins: [
        new webpack.optimize.CommonsChunkPlugin({
            names: ['vendor', 'manifest']
        })
    ],
    devtool: 'source-map'
};

let prodConfig = {
    output: {
        filename: '[name].[chunkhash].js',
        chunkFilename: 'chunk.[id].[chunkhash].js'
    },
    plugins: [
        // FIXME: https://github.com/webpack-contrib/uglifyjs-webpack-plugin/issues/132
        new webpack.optimize.UglifyJsPlugin({
            minimize: true,
            compress: {warnings: false}
        }),
        new AssetsWebpackPlugin({
            path: outputPath
        }),
        new webpack.HashedModuleIdsPlugin()
    ]
};

let devConfig = {
    output: {
        filename: '[name].js',
        chunkFilename: 'chunk.[id].js'
    },
    plugins: [
        new webpack.NamedModulesPlugin()
    ]
};

let mrgConfig = devMode ? devConfig : prodConfig;
module.exports = merge(baseConfig, mrgConfig);