const webpack = require('webpack');
const merge = require('webpack-merge');
const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');

let baseConfig = require('./webpack.base.conf.js');
let config = require('./config');
let utils = require('./utils');

let webpackConfig = merge(baseConfig, {
    module: {
        rules: utils.styleLoaders({
            sourceMap: config.build.productionSourceMap,
            extract: true
        })
    },
    devtool: config.build.productionSourceMap ? '#source-map' : false,
    output: {
        filename: utils.assetsPath('js/[name].[chunkhash].js'),
        chunkFilename: utils.assetsPath('js/[name].[chunkhash].js')
    },
    plugins: [
        new webpack.DefinePlugin({
            'process.env': config.build.env
        }),
        new webpack.optimize.UglifyJsPlugin({
            parallel: true,
            sourceMap: true
        }),
        new ExtractTextPlugin({
            filename: utils.assetsPath('css/[name].[chunkhash].css')
        }),
        new OptimizeCSSPlugin({
            cssProcessorOptions: {
                safe: true
            }
        }),
        new HtmlWebpackPlugin({
            filename: 'index.html',
            template: './src/index.html',
            inject: true,
            minify: {
                removeComments: true,
                collapseWhitespace: true,
                removeAttributeQuotes: true
            }
        })
    ]
});



module.exports = webpackConfig;